Fix canonical & meta URLs. Closes #107

README.md

@@ -254,10 +254,11 @@ server {
     }
     
     location / {
-        add_header Access-Control-Allow-Origin $xssorigin;
         proxy_http_version 1.1;
         proxy_set_header Connection "";
         proxy_pass http://127.0.0.1:8080;
+        proxy_hide_header Access-Control-Allow-Origin;
+        add_header Access-Control-Allow-Origin $xssorigin;
     }
 }
 ```
@@ -266,9 +267,9 @@ One further change you might want to make to the file above is the `add_header A
 my own Spothole server to make sure that other third-party web-based software can get the data from my instance, and applies to any endpoint underneath `/api`. If you want
 *your* Spothole instance to be set up the same way, so that others can write software in JavaScript that can access it,
 leave this intact. But if you want your Spothole instance to only be usable by scripts running on the web server you write,
-you can remove this block. (Note that this doesn't stop other people writing *non-web-based* software that accesses your
+you can remove this line. (Note that this doesn't stop other people writing *non-web-based* software that accesses your
 Spothole API—the enforcement of cross-origin headers only happens within the user's browser. If you need to lock your
-instance down so that no-one else can access it with *any* software, that's an aspect of nginx config that you will need
+instance down so that no-one else can access it with *any* software, that's an aspect of nginx or firewall config that you will need
 to find help with elsewhere.)
 
 Now, make a symbolic link to enable the site:
@@ -344,6 +345,8 @@ The same approach as above is also used for alert providers.
 
 As well as being my work, I have also gratefully received feature patches from Steven, M1SDH.
 
+The project contains GeoJSON files for CQ and ITU zones, in the `/datafiles/` directory. These are MIT-licenced and, to my knowledge, created by HA8TKS for his CQ and ITU zone layers for Leaflet.
+
 The project contains a self-hosted copy of Font Awesome's free library, in the `/webassets/fa/` directory. This is subject to Font Awesome's licence and is not covered by the overall licence declared in the `LICENSE` file. This approach was taken in preference to using their hosted kits due to the popularity of this project exceeding the page view limit for their free hosted offering.
 
 The project contains a set of flag icons generated using the "Noto Color Emoji" font on a Debian system, in the `/webassets/img/flags/` directory.

alertproviders/alert_provider.py

@@ -5,46 +5,51 @@ import pytz
 from core.config import MAX_ALERT_AGE
 
 
-# Generic alert provider class. Subclasses of this query the individual APIs for alerts.
 class AlertProvider:
+    """Generic alert provider class. Subclasses of this query the individual APIs for alerts."""
 
-    # Constructor
     def __init__(self, provider_config):
+        """Constructor"""
+
         self.name = provider_config["name"]
         self.enabled = provider_config["enabled"]
         self.last_update_time = datetime.min.replace(tzinfo=pytz.UTC)
         self.status = "Not Started" if self.enabled else "Disabled"
-        self.alerts = None
+        self._alerts = None
-        self.web_server = None
+        self._web_server = None
 
-    # Set up the provider, e.g. giving it the alert list to work from
     def setup(self, alerts, web_server):
-        self.alerts = alerts
+        """Set up the provider, e.g. giving it the alert list to work from"""
-        self.web_server = web_server
+
+        self._alerts = alerts
+        self._web_server = web_server
 
-    # Start the provider. This should return immediately after spawning threads to access the remote resources
     def start(self):
+        """Start the provider. This should return immediately after spawning threads to access the remote resources"""
+
         raise NotImplementedError("Subclasses must implement this method")
 
-    # Submit a batch of alerts retrieved from the provider. There is no timestamp checking like there is for spots,
+    def _submit_batch(self, alerts):
-    # because alerts could be created at any point for any time in the future. Rely on hashcode-based id matching
+        """Submit a batch of alerts retrieved from the provider. There is no timestamp checking like there is for spots,
-    # to deal with duplicates.
+        because alerts could be created at any point for any time in the future. Rely on hashcode-based id matching
-    def submit_batch(self, alerts):
+        to deal with duplicates."""
+
         # Sort the batch so that earliest ones go in first. This helps keep the ordering correct when alerts are fired
         # off to SSE listeners.
-        alerts = sorted(alerts, key=lambda alert: (alert.start_time if alert and alert.start_time else 0))
+        alerts = sorted(alerts, key=lambda a: (a.start_time if a and a.start_time else 0))
         for alert in alerts:
             # Fill in any blanks and add to the list
             alert.infer_missing()
-            self.add_alert(alert)
+            self._add_alert(alert)
 
-    def add_alert(self, alert):
+    def _add_alert(self, alert):
         if not alert.expired():
-            self.alerts.add(alert.id, alert, expire=MAX_ALERT_AGE)
+            self._alerts.add(alert.id, alert, expire=MAX_ALERT_AGE)
             # Ping the web server in case we have any SSE connections that need to see this immediately
-            if self.web_server:
+            if self._web_server:
-                self.web_server.notify_new_alert(alert)
+                self._web_server.notify_new_alert(alert)
 
-    # Stop any threads and prepare for application shutdown
     def stop(self):
+        """Stop any threads and prepare for application shutdown"""
+
         raise NotImplementedError("Subclasses must implement this method")

alertproviders/bota.py

@@ -8,15 +8,16 @@ from data.alert import Alert
 from data.sig_ref import SIGRef
 
 
-# Alert provider for Beaches on the Air
 class BOTA(HTTPAlertProvider):
+    """Alert provider for Beaches on the Air"""
+
     POLL_INTERVAL_SEC = 1800
     ALERTS_URL = "https://www.beachesontheair.com/"
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.ALERTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_alerts(self, http_response):
+    def _http_response_to_alerts(self, http_response):
         new_alerts = []
         # Find the table of upcoming alerts
         bs = BeautifulSoup(http_response.content.decode(), features="lxml")
@@ -33,7 +34,7 @@ class BOTA(HTTPAlertProvider):
 
                     # Get the date, dealing with the fact we get no year so have to figure out if it's last year or next year
                     date_text = str(cells[2].find('span').contents[0]).strip()
-                    date_time = datetime.strptime(date_text,"%d %b - %H:%M UTC").replace(tzinfo=pytz.UTC)
+                    date_time = datetime.strptime(date_text, "%d %b - %H:%M UTC").replace(tzinfo=pytz.UTC)
                     date_time = date_time.replace(year=datetime.now(pytz.UTC).year)
                     # If this was more than a day ago, activation is actually next year
                     if date_time < datetime.now(pytz.UTC) - timedelta(days=1):

alertproviders/http_alert_provider.py

@@ -1,7 +1,6 @@
 import logging
 from datetime import datetime
-from threading import Timer, Thread
+from threading import Thread, Event
-from time import sleep
 
 import pytz
 import requests
@@ -10,54 +9,57 @@ from alertproviders.alert_provider import AlertProvider
 from core.constants import HTTP_HEADERS
 
 
-# Generic alert provider class for providers that request data via HTTP(S). Just for convenience to avoid code
-# duplication. Subclasses of this query the individual APIs for data.
 class HTTPAlertProvider(AlertProvider):
+    """Generic alert provider class for providers that request data via HTTP(S). Just for convenience to avoid code
+    duplication. Subclasses of this query the individual APIs for data."""
 
     def __init__(self, provider_config, url, poll_interval):
         super().__init__(provider_config)
-        self.url = url
+        self._url = url
-        self.poll_interval = poll_interval
+        self._poll_interval = poll_interval
-        self.poll_timer = None
+        self._thread = None
+        self._stop_event = Event()
 
     def start(self):
-        # Fire off a one-shot thread to run poll() for the first time, just to ensure start() returns immediately and
+        # Fire off the polling thread. It will poll immediately on startup, then sleep for poll_interval between
-        # the application can continue starting. The thread itself will then die, and the timer will kick in on its own
+        # subsequent polls, so start() returns immediately and the application can continue starting.
-        # thread.
+        logging.info("Set up query of " + self.name + " alert API every " + str(self._poll_interval) + " seconds.")
-        logging.info("Set up query of " + self.name + " alert API every " + str(self.poll_interval) + " seconds.")
+        self._thread = Thread(target=self._run, daemon=True)
-        thread = Thread(target=self.poll)
+        self._thread.start()
-        thread.daemon = True
-        thread.start()
 
     def stop(self):
-        if self.poll_timer:
+        self._stop_event.set()
-            self.poll_timer.cancel()
 
-    def poll(self):
+    def _run(self):
+        while True:
+            self._poll()
+            if self._stop_event.wait(timeout=self._poll_interval):
+                break
+
+    def _poll(self):
         try:
             # Request data from API
             logging.debug("Polling " + self.name + " alert API...")
-            http_response = requests.get(self.url, headers=HTTP_HEADERS)
+            http_response = requests.get(self._url, headers=HTTP_HEADERS)
             # Pass off to the subclass for processing
-            new_alerts = self.http_response_to_alerts(http_response)
+            new_alerts = self._http_response_to_alerts(http_response)
             # Submit the new alerts for processing. There might not be any alerts for the less popular programs.
             if new_alerts:
-                self.submit_batch(new_alerts)
+                self._submit_batch(new_alerts)
 
             self.status = "OK"
             self.last_update_time = datetime.now(pytz.UTC)
             logging.debug("Received data from " + self.name + " alert API.")
 
-        except Exception as e:
+        except Exception:
             self.status = "Error"
             logging.exception("Exception in HTTP JSON Alert Provider (" + self.name + ")")
-            sleep(1)
+            # Brief pause on error before the next poll, but still respond promptly to stop()
+            self._stop_event.wait(timeout=1)
 
-        self.poll_timer = Timer(self.poll_interval, self.poll)
+    def _http_response_to_alerts(self, http_response):
-        self.poll_timer.start()
+        """Convert an HTTP response returned by the API into alert data. The whole response is provided here so the subclass
+        implementations can check for HTTP status codes if necessary, and handle the response as JSON, XML, text, whatever
+        the API actually provides."""
 
-    # Convert an HTTP response returned by the API into alert data. The whole response is provided here so the subclass
-    # implementations can check for HTTP status codes if necessary, and handle the response as JSON, XML, text, whatever
-    # the API actually provides.
-    def http_response_to_alerts(self, http_response):
         raise NotImplementedError("Subclasses must implement this method")

alertproviders/ng3k.py

@@ -8,8 +8,9 @@ from alertproviders.http_alert_provider import HTTPAlertProvider
 from data.alert import Alert
 
 
-# Alert provider NG3K DXpedition list
 class NG3K(HTTPAlertProvider):
+    """Alert provider NG3K DXpedition list"""
+
     POLL_INTERVAL_SEC = 1800
     ALERTS_URL = "https://www.ng3k.com/adxo.xml"
     AS_CALL_PATTERN = re.compile("as ([a-z0-9/]+)", re.IGNORECASE)
@@ -17,7 +18,7 @@ class NG3K(HTTPAlertProvider):
     def __init__(self, provider_config):
         super().__init__(provider_config, self.ALERTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_alerts(self, http_response):
+    def _http_response_to_alerts(self, http_response):
         new_alerts = []
         rss = RSSParser.parse(http_response.content.decode())
         # Iterate through source data
@@ -48,7 +49,8 @@ class NG3K(HTTPAlertProvider):
 
             start_timestamp = datetime.strptime(start_year + " " + start_mon + " " + start_day, "%Y %b %d").replace(
                 tzinfo=pytz.UTC).timestamp()
-            end_timestamp = datetime.strptime(end_year + " " + end_mon + " " + end_day + " 23:59", "%Y %b %d %H:%M").replace(
+            end_timestamp = datetime.strptime(end_year + " " + end_mon + " " + end_day + " 23:59",
+                                              "%Y %b %d %H:%M").replace(
                 tzinfo=pytz.UTC).timestamp()
 
             # Sometimes the DX callsign is "real", sometimes you just get a prefix with the real working callsigns being
@@ -62,7 +64,7 @@ class NG3K(HTTPAlertProvider):
                 dx_calls = [parts[2].upper()]
 
             # "Calls" of TBA, TBC or TBD are not real attempts at Turkish callsigns
-            dx_calls = list(filter(lambda a: a != "TBA" and a != "TBC" and a != "TBD" , dx_calls))
+            dx_calls = list(filter(lambda a: a != "TBA" and a != "TBC" and a != "TBD", dx_calls))
 
             dx_country = parts[1]
             qsl_info = parts[3]

alertproviders/parksnpeaks.py

@@ -8,15 +8,16 @@ from data.alert import Alert
 from data.sig_ref import SIGRef
 
 
-# Alert provider for Parks n Peaks
 class ParksNPeaks(HTTPAlertProvider):
+    """Alert provider for Parks n Peaks"""
+
     POLL_INTERVAL_SEC = 1800
     ALERTS_URL = "http://parksnpeaks.org/api/ALERTS/"
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.ALERTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_alerts(self, http_response):
+    def _http_response_to_alerts(self, http_response):
         new_alerts = []
         # Iterate through source data
         for source_alert in http_response.json():
@@ -44,7 +45,7 @@ class ParksNPeaks(HTTPAlertProvider):
 
             # Log a warning for the developer if PnP gives us an unknown programme we've never seen before
             if sig and sig not in ["POTA", "SOTA", "WWFF", "SiOTA", "ZLOTA", "KRMNPA"]:
-                logging.warn("PNP alert found with sig " + sig + ", developer needs to add support for this!")
+                logging.warning("PNP alert found with sig " + sig + ", developer needs to add support for this!")
 
             # If this is POTA, SOTA or WWFF data we already have it through other means, so ignore. Otherwise, add to
             # the alert list. Note that while ZLOTA has its own spots API, it doesn't have its own alerts API. So that

alertproviders/pota.py

@@ -7,15 +7,16 @@ from data.alert import Alert
 from data.sig_ref import SIGRef
 
 
-# Alert provider for Parks on the Air
 class POTA(HTTPAlertProvider):
+    """Alert provider for Parks on the Air"""
+
     POLL_INTERVAL_SEC = 1800
     ALERTS_URL = "https://api.pota.app/activation"
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.ALERTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_alerts(self, http_response):
+    def _http_response_to_alerts(self, http_response):
         new_alerts = []
         # Iterate through source data
         for source_alert in http_response.json():
@@ -25,7 +26,8 @@ class POTA(HTTPAlertProvider):
                           dx_calls=[source_alert["activator"].upper()],
                           freqs_modes=source_alert["frequencies"],
                           comment=source_alert["comments"],
-                          sig_refs=[SIGRef(id=source_alert["reference"], sig="POTA", name=source_alert["name"], url="https://pota.app/#/park/" + source_alert["reference"])],
+                          sig_refs=[SIGRef(id=source_alert["reference"], sig="POTA", name=source_alert["name"],
+                                           url="https://pota.app/#/park/" + source_alert["reference"])],
                           start_time=datetime.strptime(source_alert["startDate"] + source_alert["startTime"],
                                                        "%Y-%m-%d%H:%M").replace(tzinfo=pytz.UTC).timestamp(),
                           end_time=datetime.strptime(source_alert["endDate"] + source_alert["endTime"],

alertproviders/sota.py

@@ -7,15 +7,16 @@ from data.alert import Alert
 from data.sig_ref import SIGRef
 
 
-# Alert provider for Summits on the Air
 class SOTA(HTTPAlertProvider):
+    """Alert provider for Summits on the Air"""
+
     POLL_INTERVAL_SEC = 1800
     ALERTS_URL = "https://api-db2.sota.org.uk/api/alerts/365/all/all"
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.ALERTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_alerts(self, http_response):
+    def _http_response_to_alerts(self, http_response):
         new_alerts = []
         # Iterate through source data
         for source_alert in http_response.json():
@@ -31,7 +32,9 @@ class SOTA(HTTPAlertProvider):
                           dx_names=[source_alert["activatorName"].upper()],
                           freqs_modes=source_alert["frequency"],
                           comment=source_alert["comments"],
-                          sig_refs=[SIGRef(id=source_alert["associationCode"] + "/" + source_alert["summitCode"], sig="SOTA", name=summit_name, activation_score=summit_points)],
+                          sig_refs=[
+                              SIGRef(id=source_alert["associationCode"] + "/" + source_alert["summitCode"], sig="SOTA",
+                                     name=summit_name, activation_score=summit_points)],
                           start_time=datetime.strptime(source_alert["dateActivated"],
                                                        "%Y-%m-%dT%H:%M:%SZ").replace(tzinfo=pytz.UTC).timestamp(),
                           is_dxpedition=False)

alertproviders/wota.py

@@ -8,8 +8,9 @@ from data.alert import Alert
 from data.sig_ref import SIGRef
 
 
-# Alert provider for Wainwrights on the Air
 class WOTA(HTTPAlertProvider):
+    """Alert provider for Wainwrights on the Air"""
+
     POLL_INTERVAL_SEC = 1800
     ALERTS_URL = "https://www.wota.org.uk/alerts_rss.php"
     RSS_DATE_TIME_FORMAT = "%a, %d %b %Y %H:%M:%S %z"
@@ -17,7 +18,7 @@ class WOTA(HTTPAlertProvider):
     def __init__(self, provider_config):
         super().__init__(provider_config, self.ALERTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_alerts(self, http_response):
+    def _http_response_to_alerts(self, http_response):
         new_alerts = []
         rss = RSSParser.parse(http_response.content.decode())
         # Iterate through source data

alertproviders/wwff.py

@@ -7,15 +7,16 @@ from data.alert import Alert
 from data.sig_ref import SIGRef
 
 
-# Alert provider for Worldwide Flora and Fauna
 class WWFF(HTTPAlertProvider):
+    """Alert provider for Worldwide Flora and Fauna"""
+
     POLL_INTERVAL_SEC = 1800
     ALERTS_URL = "https://spots.wwff.co/static/agendas.json"
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.ALERTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_alerts(self, http_response):
+    def _http_response_to_alerts(self, http_response):
         new_alerts = []
         # Iterate through source data
         for source_alert in http_response.json():

config-example.yml

@@ -6,6 +6,9 @@
 # this as "N0CALL" and it shouldn't do any harm, as we're not sending anything to the various networks, only receiving.
 server-owner-callsign: "N0CALL"
 
+# The base URL at which the software runs.
+base-url: "http://localhost:8080"
+
 # Spot providers to use. This is an example set, tailor it to your liking by commenting and uncommenting.
 # RBN and APRS-IS are supported but have such a high data rate, you probably don't want them enabled.
 # Each provider needs a class, a name, and an enabled/disabled state. Some require more config such as hostnames/IP

core/cleanup.py

@@ -1,67 +1,73 @@
 import logging
 from datetime import datetime
-from threading import Timer
+from threading import Event, Thread
-from time import sleep
 
 import pytz
 
 
-# Provides a timed cleanup of the spot list.
 class CleanupTimer:
+    """Provides a timed cleanup of the spot list."""
 
-    # Constructor
     def __init__(self, spots, alerts, web_server, cleanup_interval):
-        self.spots = spots
+        """Constructor"""
-        self.alerts = alerts
+
-        self.web_server = web_server
+        self._spots = spots
-        self.cleanup_interval = cleanup_interval
+        self._alerts = alerts
-        self.cleanup_timer = None
+        self._web_server = web_server
+        self._cleanup_interval = cleanup_interval
         self.last_cleanup_time = datetime.min.replace(tzinfo=pytz.UTC)
         self.status = "Starting"
+        self._thread = None
+        self._stop_event = Event()
 
-    # Start the cleanup timer
     def start(self):
-        self.cleanup()
+        """Start the cleanup timer"""
+
+        self._thread = Thread(target=self._run, daemon=True)
+        self._thread.start()
 
-    # Stop any threads and prepare for application shutdown
     def stop(self):
-        self.cleanup_timer.cancel()
+        """Stop any threads and prepare for application shutdown"""
+
+        self._stop_event.set()
+
+    def _run(self):
+        while not self._stop_event.wait(timeout=self._cleanup_interval):
+            self._cleanup()
+
+    def _cleanup(self):
+        """Perform cleanup and reschedule next timer"""
 
-    # Perform cleanup and reschedule next timer
-    def cleanup(self):
         try:
             # Perform cleanup via letting the data expire
-            self.spots.expire()
+            self._spots.expire()
-            self.alerts.expire()
+            self._alerts.expire()
 
             # Explicitly clean up any spots and alerts that have expired
-            for id in list(self.spots.iterkeys()):
+            for i in list(self._spots.iterkeys()):
                 try:
-                    spot = self.spots[id]
+                    spot = self._spots[i]
                     if spot.expired():
-                        self.spots.delete(id)
+                        self._spots.delete(i)
                 except KeyError:
                     # Must have already been deleted, OK with that
                     pass
-            for id in list(self.alerts.iterkeys()):
+            for i in list(self._alerts.iterkeys()):
                 try:
-                    alert = self.alerts[id]
+                    alert = self._alerts[i]
                     if alert.expired():
-                        self.alerts.delete(id)
+                        self._alerts.delete(i)
                 except KeyError:
                     # Must have already been deleted, OK with that
                     pass
 
             # Clean up web server SSE spot/alert queues
-            self.web_server.clean_up_sse_queues()
+            self._web_server.clean_up_sse_queues()
 
             self.status = "OK"
             self.last_cleanup_time = datetime.now(pytz.UTC)
 
-        except Exception as e:
+        except Exception:
             self.status = "Error"
             logging.exception("Exception in Cleanup thread")
-            sleep(1)
+            self._stop_event.wait(timeout=1)
-
-        self.cleanup_timer = Timer(self.cleanup_interval, self.cleanup)
-        self.cleanup_timer.start()

core/config.py

@@ -10,9 +10,11 @@ if not os.path.isfile("config.yml"):
     exit()
 
 # Load config
-config = yaml.safe_load(open("config.yml"))
+with open("config.yml") as f:
+    config = yaml.safe_load(f)
 logging.info("Loaded config.")
 
+BASE_URL = config["base-url"]
 MAX_SPOT_AGE = config["max-spot-age-sec"]
 MAX_ALERT_AGE = config["max-alert-age-sec"]
 SERVER_OWNER_CALLSIGN = config["server-owner-callsign"]
@@ -23,7 +25,7 @@ WEB_UI_OPTIONS = config["web-ui-options"]
 # For ease of config, each spot provider owns its own config about whether it should be enabled by default in the web UI
 # but for consistency we provide this to the front-end in web-ui-options because it has no impact outside of the web UI.
 WEB_UI_OPTIONS["spot-providers-enabled-by-default"] = [p["name"] for p in config["spot-providers"] if p["enabled"] and (
-            "enabled-by-default-in-web-ui" not in p or p["enabled-by-default-in-web-ui"] == True)]
+        "enabled-by-default-in-web-ui" not in p or p["enabled-by-default-in-web-ui"])]
 # If spotting to this server is enabled, "API" is another valid spot source even though it does not come from
 # one of our proviers. We set that to also be enabled by default.
 if ALLOW_SPOTTING:

core/constants.py

@@ -19,7 +19,7 @@ SIGS = [
     SIG(name="WWBOTA", description="Worldwide Bunkers on the Air", ref_regex=r"B\/[A-Z0-9]{1,3}\-\d{3,4}"),
     SIG(name="HEMA", description="HuMPs Excluding Marilyns Award", ref_regex=r"[A-Z0-9]{1,3}\/[A-Z]{3}\-\d{3}"),
     SIG(name="IOTA", description="Islands on the Air", ref_regex=r"[A-Z]{2}\-\d{3}"),
-   SIG(name="MOTA", description="Mills on the Air", ref_regex=r"X\d{4-6}"),
+    SIG(name="MOTA", description="Mills on the Air", ref_regex=r"X\d{4,6}"),
     SIG(name="ARLHS", description="Amateur Radio Lighthouse Society", ref_regex=r"[A-Z]{3}\-\d{3,4}"),
     SIG(name="ILLW", description="International Lighthouse & Lightship Weekend", ref_regex=r"[A-Z]{2}\d{4}"),
     SIG(name="SIOTA", description="Silos on the Air", ref_regex=r"[A-Z]{2}\-[A-Z]{3}\d"),

core/geo_utils.py

@@ -2,15 +2,172 @@ import logging
 import re
 from math import floor
 
+import geopandas
 from pyproj import Transformer
+from shapely import prepare
+from shapely.geometry import Point, Polygon
 
 TRANSFORMER_OS_GRID_TO_WGS84 = Transformer.from_crs("EPSG:27700", "EPSG:4326")
 TRANSFORMER_IRISH_GRID_TO_WGS84 = Transformer.from_crs("EPSG:29903", "EPSG:4326")
 TRANSFORMER_CI_UTM_GRID_TO_WGS84 = Transformer.from_crs("+proj=utm +zone=30 +ellps=WGS84", "EPSG:4326")
 
+cq_zone_data = geopandas.GeoDataFrame.from_features(geopandas.read_file("datafiles/cqzones.geojson"))
+itu_zone_data = geopandas.GeoDataFrame.from_features(geopandas.read_file("datafiles/ituzones.geojson"))
+for idx in cq_zone_data.index:
+    prepare(cq_zone_data.at[idx, 'geometry'])
+for idx in itu_zone_data.index:
+    prepare(itu_zone_data.at[idx, 'geometry'])
+
+
+def lat_lon_to_cq_zone(lat, lon):
+    """Finds out which CQ zone a lat/lon point is in."""
+
+    lon = ((lon + 180) % 360) - 180
+    for index, row in cq_zone_data.iterrows():
+        polygon = Polygon(row["geometry"])
+        test_point = Point(lon, lat)
+        if polygon.contains(test_point):
+            return int(row["name"])
+
+        # Might have problems around the antemeridian, so if we didn't find a match, try offsetting the point by + or -
+        # 360 degrees longitude to try the other side of the Earth
+        if lon < 0:
+            test_point = Point(lon + 360, lat)
+        else:
+            test_point = Point(lon - 360, lat)
+        if polygon.contains(test_point):
+            return int(row["name"])
+    return None
+
+
+def lat_lon_to_itu_zone(lat, lon):
+    """Finds out which ITU zone a lat/lon point is in."""
+
+    lon = ((lon + 180) % 360) - 180
+    for index, row in itu_zone_data.iterrows():
+        polygon = Polygon(row["geometry"])
+        test_point = Point(lon, lat)
+        if polygon.contains(test_point):
+            return int(row["name"])
+
+        # Might have problems around the antemeridian, so if we didn't find a match, try offsetting the point by + or -
+        # 360 degrees longitude to try the other side of the Earth
+        if lon < 0:
+            test_point = Point(lon + 360, lat)
+        else:
+            test_point = Point(lon - 360, lat)
+        if polygon.contains(test_point):
+            return int(row["name"])
+    return None
+
+
+def lat_lon_for_grid_centre(grid):
+    """Convert a Maidenhead grid reference of arbitrary precision to the lat/long of the centre point of the square.
+    Returns None if the grid format is invalid."""
+
+    lat, lon, lat_cell_size, lon_cell_size = lat_lon_for_grid_sw_corner_plus_size(grid)
+    if lat is not None and lon is not None and lat_cell_size is not None and lon_cell_size is not None:
+        return [lat + lat_cell_size / 2.0, lon + lon_cell_size / 2.0]
+    else:
+        return None
+
+
+def lat_lon_for_grid_sw_corner(grid):
+    """Convert a Maidenhead grid reference of arbitrary precision to the lat/long of the southwest corner of the square.
+    Returns None if the grid format is invalid."""
+
+    lat, lon, lat_cell_size, lon_cell_size = lat_lon_for_grid_sw_corner_plus_size(grid)
+    if lat is not None and lon is not None:
+        return [lat, lon]
+    else:
+        return None
+
+
+def lat_lon_for_grid_ne_corner(grid):
+    """Convert a Maidenhead grid reference of arbitrary precision to the lat/long of the northeast corner of the square.
+    Returns None if the grid format is invalid."""
+
+    lat, lon, lat_cell_size, lon_cell_size = lat_lon_for_grid_sw_corner_plus_size(grid)
+    if lat is not None and lon is not None and lat_cell_size is not None and lon_cell_size is not None:
+        return [lat + lat_cell_size, lon + lon_cell_size]
+    else:
+        return None
+
+
+def lat_lon_for_grid_sw_corner_plus_size(grid):
+    """Convert a Maidenhead grid reference of arbitrary precision to lat/long, including in the result the size of the
+    lowest grid square. This is a utility method used by the main methods that return the centre, southwest, and
+    northeast coordinates of a grid square.
+    The return type is always a tuple of size 4. The elements in it are None if the grid format is invalid."""
+
+    # Make sure we are in upper case so our maths works. Case is arbitrary for Maidenhead references
+    grid = grid.upper()
+
+    # Return None if our Maidenhead string is invalid or too short
+    length = len(grid)
+    if length <= 0 or (length % 2) != 0:
+        return None, None, None, None
+
+    lat = 0.0  # aggregated latitude
+    lon = 0.0  # aggregated longitude
+    lat_cell_size = 10.0  # Size in degrees latitude of the current cell. Starts at 10 and gets smaller as the calculation progresses
+    lon_cell_size = 20.0  # Size in degrees longitude of the current cell. Starts at 20 and gets smaller as the calculation progresses
+
+    # Iterate through blocks (two-character sections)
+    block = 0
+    while block * 2 < length:
+        if block % 2 == 0:
+            # Letters in this block
+            lon_cell_no = ord(grid[block * 2]) - ord('A')
+            lat_cell_no = ord(grid[block * 2 + 1]) - ord('A')
+            # Bail if the values aren't in range. Allowed values are A-R (0-17) for the first letter block, or
+            # A-X (0-23) thereafter.
+            max_cell_no = 17 if block == 0 else 23
+            if lat_cell_no < 0 or lat_cell_no > max_cell_no or lon_cell_no < 0 or lon_cell_no > max_cell_no:
+                return None, None, None, None
+        else:
+            # Numbers in this block
+            try:
+                lon_cell_no = int(grid[block * 2])
+                lat_cell_no = int(grid[block * 2 + 1])
+            except ValueError:
+                return None, None, None, None
+            # Bail if the values aren't in range 0-9
+            if lat_cell_no < 0 or lat_cell_no > 9 or lon_cell_no < 0 or lon_cell_no > 9:
+                return None, None, None, None
+
+        # Aggregate the angles
+        lat += lat_cell_no * lat_cell_size
+        lon += lon_cell_no * lon_cell_size
+
+        # Reduce the cell size for the next block, unless we are on the last cell.
+        if block * 2 < length - 2:
+            # Still have more work to do, so reduce the cell size
+            if block % 2 == 0:
+                # Just dealt with letters, next block will be numbers so cells will be 1/10 the current size
+                lat_cell_size = lat_cell_size / 10.0
+                lon_cell_size = lon_cell_size / 10.0
+            else:
+                # Just dealt with numbers, next block will be letters so cells will be 1/24 the current size
+                lat_cell_size = lat_cell_size / 24.0
+                lon_cell_size = lon_cell_size / 24.0
+
+        block += 1
+
+    # Offset back to (-180, -90) where the grid starts
+    lon -= 180.0
+    lat -= 90.0
+
+    # Return None values on maths errors
+    if any(x != x for x in [lat, lon, lat_cell_size, lon_cell_size]):  # NaN check
+        return None, None, None, None
+
+    return lat, lon, lat_cell_size, lon_cell_size
+
 
-# Convert a Worked All Britain or Worked All Ireland reference to a lat/lon point.
 def wab_wai_square_to_lat_lon(ref):
+    """Convert a Worked All Britain or Worked All Ireland reference to a lat/lon point."""
+
     # First check we have a valid grid square, and based on what it looks like, use either the Ordnance Survey, Irish,
     # or UTM grid systems to perform the conversion.
     if re.match(r"^[HNOST][ABCDEFGHJKLMNOPQRSTUVWXYZ][0-9]{2}$", ref):
@@ -20,12 +177,13 @@ def wab_wai_square_to_lat_lon(ref):
     elif re.match(r"^W[AV][0-9]{2}$", ref):
         return utm_grid_square_to_lat_lon(ref)
     else:
-        logging.warn("Invalid WAB/WAI square: " + ref)
+        logging.warning("Invalid WAB/WAI square: " + ref)
         return None
 
 
-# Get a lat/lon point for the centre of an Ordnance Survey grid square
 def os_grid_square_to_lat_lon(ref):
+    """Get a lat/lon point for the centre of an Ordnance Survey grid square"""
+
     # Convert the letters into multipliers for the 500km squares and 100km squares
     offset_500km_multiplier = ord(ref[0]) - 65
     offset_100km_multiplier = ord(ref[1]) - 65
@@ -54,8 +212,9 @@ def os_grid_square_to_lat_lon(ref):
     return lat, lon
 
 
-# Get a lat/lon point for the centre of an Irish Grid square.
 def irish_grid_square_to_lat_lon(ref):
+    """Get a lat/lon point for the centre of an Irish Grid square."""
+
     # Convert the letters into multipliers for the 100km squares
     offset_100km_multiplier = ord(ref[0]) - 65
 
@@ -81,8 +240,9 @@ def irish_grid_square_to_lat_lon(ref):
     return lat, lon
 
 
-# Get a lat/lon point for the centre of a UTM grid square (supports only squares WA & WV for the Channel Islands, nothing else implemented)
 def utm_grid_square_to_lat_lon(ref):
+    """Get a lat/lon point for the centre of a UTM grid square (supports only squares WA & WV for the Channel Islands, nothing else implemented)"""
+
     # Take the numeric parts of the grid square and multiply by 10000 to get metres from the corner of the letter-based grid square
     easting = int(ref[2]) * 10000
     northing = int(ref[3]) * 10000

core/lookup_helper.py

@@ -19,37 +19,38 @@ from core.constants import BANDS, UNKNOWN_BAND, CW_MODES, PHONE_MODES, DATA_MODE
     HTTP_HEADERS, HAMQTH_PRG, MODE_ALIASES
 
 
-# Singleton class that provides lookup functionality.
 class LookupHelper:
+    """Singleton class that provides lookup functionality."""
 
-    # Create the lookup helper. Note that nothing actually happens until the start() method is called, and that all
-    # lookup methods will fail if start() has not yet been called. This therefore needs starting before any spot or
-    # alert handlers are created.
     def __init__(self):
-        self.CLUBLOG_CALLSIGN_DATA_CACHE = None
+        """Create the lookup helper. Note that nothing actually happens until the start() method is called, and that all
-        self.LOOKUP_LIB_CLUBLOG_XML = None
+        lookup methods will fail if start() has not yet been called. This therefore needs starting before any spot or
-        self.CLUBLOG_XML_AVAILABLE = None
+        alert handlers are created."""
-        self.LOOKUP_LIB_CLUBLOG_API = None
+
-        self.CLUBLOG_XML_DOWNLOAD_LOCATION = None
+        self._clublog_callsign_data_cache = None
-        self.CLUBLOG_API_AVAILABLE = None
+        self._lookup_lib_clublog_xml = None
-        self.CLUBLOG_CTY_XML_CACHE = None
+        self._clublog_xml_available = None
-        self.CLUBLOG_API_KEY = None
+        self._lookup_lib_clublog_api = None
-        self.QRZ_CALLSIGN_DATA_CACHE = None
+        self._clublog_xml_download_location = None
-        self.LOOKUP_LIB_QRZ = None
+        self._clublog_api_available = None
-        self.QRZ_AVAILABLE = None
+        self._clublog_cty_xml_cache = None
-        self.HAMQTH_AVAILABLE = None
+        self._clublog_api_key = None
-        self.HAMQTH_CALLSIGN_DATA_CACHE = None
+        self._qrz_callsign_data_cache = None
-        self.HAMQTH_BASE_URL = "https://www.hamqth.com/xml.php"
+        self._lookup_lib_qrz = None
+        self._qrz_available = None
+        self._hamqth_available = None
+        self._hamqth_callsign_data_cache = None
+        self._hamqth_base_url = "https://www.hamqth.com/xml.php"
         # HamQTH session keys expire after an hour. Rather than working out how much time has passed manually, we cheat
         # and cache the HTTP response for 55 minutes, so when the login URL is queried within 55 minutes of the previous
         # time, you just get the cached response.
-        self.HAMQTH_SESSION_LOOKUP_CACHE = CachedSession("cache/hamqth_session_cache",
+        self._hamqth_session_lookup_cache = CachedSession("cache/hamqth_session_cache",
                                                           expire_after=timedelta(minutes=55))
-        self.CALL_INFO_BASIC = None
+        self._call_info_basic = None
-        self.LOOKUP_LIB_BASIC = None
+        self._lookup_lib_basic = None
-        self.COUNTRY_FILES_CTY_PLIST_DOWNLOAD_LOCATION = None
+        self._country_files_cty_plist_download_location = None
-        self.DXCC_JSON_DOWNLOAD_LOCATION = None
+        self._dxcc_json_download_location = None
-        self.DXCC_DATA = None
+        self._dxcc_data = None
 
     def start(self):
         # Lookup helpers from pyhamtools. We use five (!) of these. The simplest is country-files.com, which downloads
@@ -57,61 +58,66 @@ class LookupHelper:
         # If the user provides login details/API keys, we also set up helpers for QRZ.com, HamQTH, Clublog (live API
         # request), and Clublog (XML download). The lookup functions iterate through these in a sensible order, looking
         # for suitable data.
-        self.COUNTRY_FILES_CTY_PLIST_DOWNLOAD_LOCATION = "cache/cty.plist"
+        self._country_files_cty_plist_download_location = "cache/cty.plist"
-        success = self.download_country_files_cty_plist()
+        success = self._download_country_files_cty_plist()
         if success:
-            self.LOOKUP_LIB_BASIC = LookupLib(lookuptype="countryfile",
+            self._lookup_lib_basic = LookupLib(lookuptype="countryfile",
-                                              filename=self.COUNTRY_FILES_CTY_PLIST_DOWNLOAD_LOCATION)
+                                               filename=self._country_files_cty_plist_download_location)
         else:
-            self.LOOKUP_LIB_BASIC = LookupLib(lookuptype="countryfile")
+            self._lookup_lib_basic = LookupLib(lookuptype="countryfile")
-        self.CALL_INFO_BASIC = Callinfo(self.LOOKUP_LIB_BASIC)
+        self._call_info_basic = Callinfo(self._lookup_lib_basic)
 
-        self.QRZ_AVAILABLE = config["qrz-username"] != "" and config["qrz-password"] != ""
+        self._qrz_available = config["qrz-username"] != "" and config["qrz-password"] != ""
-        if self.QRZ_AVAILABLE:
+        if self._qrz_available:
-            self.LOOKUP_LIB_QRZ = LookupLib(lookuptype="qrz", username=config["qrz-username"],
+            self._lookup_lib_qrz = LookupLib(lookuptype="qrz", username=config["qrz-username"],
                                              pwd=config["qrz-password"])
-        self.QRZ_CALLSIGN_DATA_CACHE = Cache('cache/qrz_callsign_lookup_cache')
+        self._qrz_callsign_data_cache = Cache('cache/qrz_callsign_lookup_cache')
 
-        self.HAMQTH_AVAILABLE = config["hamqth-username"] != "" and config["hamqth-password"] != ""
+        self._hamqth_available = config["hamqth-username"] != "" and config["hamqth-password"] != ""
-        self.HAMQTH_CALLSIGN_DATA_CACHE = Cache('cache/hamqth_callsign_lookup_cache')
+        self._hamqth_callsign_data_cache = Cache('cache/hamqth_callsign_lookup_cache')
 
-        self.CLUBLOG_API_KEY = config["clublog-api-key"]
+        self._clublog_api_key = config["clublog-api-key"]
-        self.CLUBLOG_CTY_XML_CACHE = CachedSession("cache/clublog_cty_xml_cache", expire_after=timedelta(days=10))
+        self._clublog_cty_xml_cache = CachedSession("cache/clublog_cty_xml_cache", expire_after=timedelta(days=10))
-        self.CLUBLOG_API_AVAILABLE = self.CLUBLOG_API_KEY != ""
+        self._clublog_api_available = self._clublog_api_key != ""
-        self.CLUBLOG_XML_DOWNLOAD_LOCATION = "cache/cty.xml"
+        self._clublog_xml_download_location = "cache/cty.xml"
-        if self.CLUBLOG_API_AVAILABLE:
+        if self._clublog_api_available:
-            self.LOOKUP_LIB_CLUBLOG_API = LookupLib(lookuptype="clublogapi", apikey=self.CLUBLOG_API_KEY)
+            self._lookup_lib_clublog_api = LookupLib(lookuptype="clublogapi", apikey=self._clublog_api_key)
-            success = self.download_clublog_ctyxml()
+            success = self._download_clublog_ctyxml()
-            self.CLUBLOG_XML_AVAILABLE = success
+            self._clublog_xml_available = success
             if success:
-                self.LOOKUP_LIB_CLUBLOG_XML = LookupLib(lookuptype="clublogxml",
+                self._lookup_lib_clublog_xml = LookupLib(lookuptype="clublogxml",
-                                                        filename=self.CLUBLOG_XML_DOWNLOAD_LOCATION)
+                                                         filename=self._clublog_xml_download_location)
-        self.CLUBLOG_CALLSIGN_DATA_CACHE = Cache('cache/clublog_callsign_lookup_cache')
+        self._clublog_callsign_data_cache = Cache('cache/clublog_callsign_lookup_cache')
 
         # We also get a lookup of DXCC data from K0SWE to use for additional lookups of e.g. flags.
-        self.DXCC_JSON_DOWNLOAD_LOCATION = "cache/dxcc.json"
+        self._dxcc_json_download_location = "cache/dxcc.json"
-        success = self.download_dxcc_json()
+        success = self._download_dxcc_json()
         if success:
-            with open(self.DXCC_JSON_DOWNLOAD_LOCATION) as f:
+            with open(self._dxcc_json_download_location) as f:
                 tmp_dxcc_data = json.load(f)["dxcc"]
                 # Reformat as a map for faster lookup
-                self.DXCC_DATA = {}
+                self._dxcc_data = {}
                 for dxcc in tmp_dxcc_data:
-                    self.DXCC_DATA[dxcc["entityCode"]] = dxcc
+                    self._dxcc_data[dxcc["entityCode"]] = dxcc
         else:
             logging.error("Could not download DXCC data, flags and similar data may be missing!")
 
-    # Download the cty.plist file from country-files.com on first startup. The pyhamtools lib can actually download and use
+        # Precompile regex matches for DXCCs to improve efficiency when iterating through them
-    # this itself, but it's occasionally offline which causes it to throw an error. By downloading it separately, we can
+        for dxcc in (self._dxcc_data.values() if self._dxcc_data else []):
-    # catch errors and handle them, falling back to a previous copy of the file in the cache, and we can use the
+            dxcc["_prefixRegexCompiled"] = re.compile(dxcc["prefixRegex"])
-    # requests_cache library to prevent re-downloading too quickly if the software keeps restarting.
+
-    def download_country_files_cty_plist(self):
+    def _download_country_files_cty_plist(self):
+        """Download the cty.plist file from country-files.com on first startup. The pyhamtools lib can actually download and use
+        this itself, but it's occasionally offline which causes it to throw an error. By downloading it separately, we can
+        catch errors and handle them, falling back to a previous copy of the file in the cache, and we can use the
+        requests_cache library to prevent re-downloading too quickly if the software keeps restarting."""
+
         try:
             logging.info("Downloading Country-files.com cty.plist...")
             response = SEMI_STATIC_URL_DATA_CACHE.get("https://www.country-files.com/cty/cty.plist",
                                                       headers=HTTP_HEADERS).text
 
-            with open(self.COUNTRY_FILES_CTY_PLIST_DOWNLOAD_LOCATION, "w") as f:
+            with open(self._country_files_cty_plist_download_location, "w") as f:
                 f.write(response)
                 f.flush()
                 return True
@@ -120,14 +126,16 @@ class LookupHelper:
             logging.error("Exception when downloading Clublog cty.xml", e)
             return False
 
-    # Download the dxcc.json file on first startup.
+    def _download_dxcc_json(self):
-    def download_dxcc_json(self):
+        """Download the dxcc.json file on first startup."""
+
         try:
             logging.info("Downloading dxcc.json...")
-            response = SEMI_STATIC_URL_DATA_CACHE.get("https://raw.githubusercontent.com/k0swe/dxcc-json/refs/heads/main/dxcc.json",
+            response = SEMI_STATIC_URL_DATA_CACHE.get(
+                "https://raw.githubusercontent.com/k0swe/dxcc-json/refs/heads/main/dxcc.json",
                 headers=HTTP_HEADERS).text
 
-            with open(self.DXCC_JSON_DOWNLOAD_LOCATION, "w") as f:
+            with open(self._dxcc_json_download_location, "w") as f:
                 f.write(response)
                 f.flush()
                 return True
@@ -136,19 +144,20 @@ class LookupHelper:
             logging.error("Exception when downloading dxcc.json", e)
             return False
 
-    # Download the cty.xml (gzipped) file from Clublog on first startup, so we can use it in preference to querying the
+    def _download_clublog_ctyxml(self):
-    # database live if possible.
+        """Download the cty.xml (gzipped) file from Clublog on first startup, so we can use it in preference to querying the
-    def download_clublog_ctyxml(self):
+        database live if possible."""
+
         try:
             logging.info("Downloading Clublog cty.xml.gz...")
-            response = self.CLUBLOG_CTY_XML_CACHE.get("https://cdn.clublog.org/cty.php?api=" + self.CLUBLOG_API_KEY,
+            response = self._clublog_cty_xml_cache.get("https://cdn.clublog.org/cty.php?api=" + self._clublog_api_key,
                                                        headers=HTTP_HEADERS)
             logging.info("Caching Clublog cty.xml.gz...")
-            open(self.CLUBLOG_XML_DOWNLOAD_LOCATION + ".gz", 'wb').write(response.content)
+            open(self._clublog_xml_download_location + ".gz", 'wb').write(response.content)
-            with gzip.open(self.CLUBLOG_XML_DOWNLOAD_LOCATION + ".gz", "rb") as uncompressed:
+            with gzip.open(self._clublog_xml_download_location + ".gz", "rb") as uncompressed:
                 file_content = uncompressed.read()
             logging.info("Caching Clublog cty.xml...")
-            with open(self.CLUBLOG_XML_DOWNLOAD_LOCATION, "wb") as f:
+            with open(self._clublog_xml_download_location, "wb") as f:
                 f.write(file_content)
                 f.flush()
                 return True
@@ -157,266 +166,254 @@ class LookupHelper:
             logging.error("Exception when downloading Clublog cty.xml", e)
             return False
 
-    # Infer a mode from the comment
-    def infer_mode_from_comment(self, comment):
-        for mode in ALL_MODES:
-            if mode in comment.upper():
-                return mode
-        for mode in MODE_ALIASES.keys():
-            if mode in comment.upper():
-                return MODE_ALIASES[mode]
-        return None
-
-    # Infer a "mode family" from a mode.
-    def infer_mode_type_from_mode(self, mode):
-        if mode.upper() in CW_MODES:
-            return "CW"
-        elif mode.upper() in PHONE_MODES:
-            return "PHONE"
-        elif mode.upper() in DATA_MODES:
-            return "DATA"
-        else:
-            if mode.upper() != "OTHER":
-                logging.warn("Found an unrecognised mode: " + mode + ". Developer should categorise this.")
-            return None
-
-    # Infer a band from a frequency in Hz
-    def infer_band_from_freq(self, freq):
-        for b in BANDS:
-            if b.start_freq <= freq <= b.end_freq:
-                return b
-        return UNKNOWN_BAND
-
-    # Infer a country name from a callsign
     def infer_country_from_callsign(self, call):
+        """Infer a country name from a callsign"""
+
         try:
             # Start with the basic country-files.com-based decoder.
-            country = self.CALL_INFO_BASIC.get_country_name(call)
+            country = self._call_info_basic.get_country_name(call)
-        except (KeyError, ValueError) as e:
+        except (KeyError, ValueError):
             country = None
         # Couldn't get anything from basic call info database, try QRZ.com
         if not country:
-            qrz_data = self.get_qrz_data_for_callsign(call)
+            qrz_data = self._get_qrz_data_for_callsign(call)
             if qrz_data and "country" in qrz_data:
                 country = qrz_data["country"]
         # Couldn't get anything from QRZ.com database, try HamQTH
         if not country:
-            hamqth_data = self.get_hamqth_data_for_callsign(call)
+            hamqth_data = self._get_hamqth_data_for_callsign(call)
             if hamqth_data and "country" in hamqth_data:
                 country = hamqth_data["country"]
         # Couldn't get anything from HamQTH database, try Clublog data
         if not country:
-            clublog_data = self.get_clublog_xml_data_for_callsign(call)
+            clublog_data = self._get_clublog_xml_data_for_callsign(call)
             if clublog_data and "Name" in clublog_data:
                 country = clublog_data["Name"]
         if not country:
-            clublog_data = self.get_clublog_api_data_for_callsign(call)
+            clublog_data = self._get_clublog_api_data_for_callsign(call)
             if clublog_data and "Name" in clublog_data:
                 country = clublog_data["Name"]
         # Couldn't get anything from Clublog database, try DXCC data
         if not country:
-            dxcc_data = self.get_dxcc_data_for_callsign(call)
+            dxcc_data = self._get_dxcc_data_for_callsign(call)
             if dxcc_data and "name" in dxcc_data:
                 country = dxcc_data["name"]
         return country
 
-    # Infer a DXCC ID from a callsign
     def infer_dxcc_id_from_callsign(self, call):
+        """Infer a DXCC ID from a callsign"""
+
         try:
             # Start with the basic country-files.com-based decoder.
-            dxcc = self.CALL_INFO_BASIC.get_adif_id(call)
+            dxcc = self._call_info_basic.get_adif_id(call)
-        except (KeyError, ValueError) as e:
+        except (KeyError, ValueError):
             dxcc = None
         # Couldn't get anything from basic call info database, try QRZ.com
         if not dxcc:
-            qrz_data = self.get_qrz_data_for_callsign(call)
+            qrz_data = self._get_qrz_data_for_callsign(call)
             if qrz_data and "adif" in qrz_data:
                 dxcc = qrz_data["adif"]
         # Couldn't get anything from QRZ.com database, try HamQTH
         if not dxcc:
-            hamqth_data = self.get_hamqth_data_for_callsign(call)
+            hamqth_data = self._get_hamqth_data_for_callsign(call)
             if hamqth_data and "adif" in hamqth_data:
                 dxcc = hamqth_data["adif"]
         # Couldn't get anything from HamQTH database, try Clublog data
         if not dxcc:
-            clublog_data = self.get_clublog_xml_data_for_callsign(call)
+            clublog_data = self._get_clublog_xml_data_for_callsign(call)
             if clublog_data and "DXCC" in clublog_data:
                 dxcc = clublog_data["DXCC"]
         if not dxcc:
-            clublog_data = self.get_clublog_api_data_for_callsign(call)
+            clublog_data = self._get_clublog_api_data_for_callsign(call)
             if clublog_data and "DXCC" in clublog_data:
                 dxcc = clublog_data["DXCC"]
         # Couldn't get anything from Clublog database, try DXCC data
         if not dxcc:
-            dxcc_data = self.get_dxcc_data_for_callsign(call)
+            dxcc_data = self._get_dxcc_data_for_callsign(call)
             if dxcc_data and "entityCode" in dxcc_data:
                 dxcc = dxcc_data["entityCode"]
         return dxcc
 
-    # Infer a continent shortcode from a callsign
     def infer_continent_from_callsign(self, call):
+        """Infer a continent shortcode from a callsign"""
+
         try:
             # Start with the basic country-files.com-based decoder.
-            continent = self.CALL_INFO_BASIC.get_continent(call)
+            continent = self._call_info_basic.get_continent(call)
-        except (KeyError, ValueError) as e:
+        except (KeyError, ValueError):
             continent = None
         # Couldn't get anything from basic call info database, try HamQTH
         if not continent:
-            hamqth_data = self.get_hamqth_data_for_callsign(call)
+            hamqth_data = self._get_hamqth_data_for_callsign(call)
             if hamqth_data and "continent" in hamqth_data:
-                country = hamqth_data["continent"]
+                continent = hamqth_data["continent"]
         # Couldn't get anything from HamQTH database, try Clublog data
         if not continent:
-            clublog_data = self.get_clublog_xml_data_for_callsign(call)
+            clublog_data = self._get_clublog_xml_data_for_callsign(call)
             if clublog_data and "Continent" in clublog_data:
                 continent = clublog_data["Continent"]
         if not continent:
-            clublog_data = self.get_clublog_api_data_for_callsign(call)
+            clublog_data = self._get_clublog_api_data_for_callsign(call)
             if clublog_data and "Continent" in clublog_data:
                 continent = clublog_data["Continent"]
         # Couldn't get anything from Clublog database, try DXCC data
         if not continent:
-            dxcc_data = self.get_dxcc_data_for_callsign(call)
+            dxcc_data = self._get_dxcc_data_for_callsign(call)
             # Some DXCCs are in two continents, if so don't use the continent data as we can't be sure
             if dxcc_data and "continent" in dxcc_data and len(dxcc_data["continent"]) == 1:
                 continent = dxcc_data["continent"][0]
         return continent
 
-    # Infer a CQ zone from a callsign
     def infer_cq_zone_from_callsign(self, call):
+        """Infer a CQ zone from a callsign"""
+
         try:
             # Start with the basic country-files.com-based decoder.
-            cqz = self.CALL_INFO_BASIC.get_cqz(call)
+            cqz = self._call_info_basic.get_cqz(call)
-        except (KeyError, ValueError) as e:
+        except (KeyError, ValueError):
             cqz = None
         # Couldn't get anything from basic call info database, try QRZ.com
         if not cqz:
-            qrz_data = self.get_qrz_data_for_callsign(call)
+            qrz_data = self._get_qrz_data_for_callsign(call)
             if qrz_data and "cqz" in qrz_data:
                 cqz = qrz_data["cqz"]
         # Couldn't get anything from QRZ.com database, try HamQTH
         if not cqz:
-            hamqth_data = self.get_hamqth_data_for_callsign(call)
+            hamqth_data = self._get_hamqth_data_for_callsign(call)
             if hamqth_data and "cq" in hamqth_data:
                 cqz = hamqth_data["cq"]
         # Couldn't get anything from HamQTH database, try Clublog data
         if not cqz:
-            clublog_data = self.get_clublog_xml_data_for_callsign(call)
+            clublog_data = self._get_clublog_xml_data_for_callsign(call)
             if clublog_data and "CQZ" in clublog_data:
                 cqz = clublog_data["CQZ"]
         if not cqz:
-            clublog_data = self.get_clublog_api_data_for_callsign(call)
+            clublog_data = self._get_clublog_api_data_for_callsign(call)
             if clublog_data and "CQZ" in clublog_data:
                 cqz = clublog_data["CQZ"]
         # Couldn't get anything from Clublog database, try DXCC data
         if not cqz:
-            dxcc_data = self.get_dxcc_data_for_callsign(call)
+            dxcc_data = self._get_dxcc_data_for_callsign(call)
             # Some DXCCs are in multiple zones, if so don't use the zone data as we can't be sure
             if dxcc_data and "cq" in dxcc_data and len(dxcc_data["cq"]) == 1:
                 cqz = dxcc_data["cq"][0]
         return cqz
 
-    # Infer a ITU zone from a callsign
     def infer_itu_zone_from_callsign(self, call):
+        """Infer a ITU zone from a callsign"""
+
         try:
             # Start with the basic country-files.com-based decoder.
-            ituz = self.CALL_INFO_BASIC.get_ituz(call)
+            ituz = self._call_info_basic.get_ituz(call)
-        except (KeyError, ValueError) as e:
+        except (KeyError, ValueError):
             ituz = None
         # Couldn't get anything from basic call info database, try QRZ.com
         if not ituz:
-            qrz_data = self.get_qrz_data_for_callsign(call)
+            qrz_data = self._get_qrz_data_for_callsign(call)
             if qrz_data and "ituz" in qrz_data:
                 ituz = qrz_data["ituz"]
         # Couldn't get anything from QRZ.com database, try HamQTH
         if not ituz:
-            hamqth_data = self.get_hamqth_data_for_callsign(call)
+            hamqth_data = self._get_hamqth_data_for_callsign(call)
             if hamqth_data and "itu" in hamqth_data:
                 ituz = hamqth_data["itu"]
         # Couldn't get anything from HamQTH database, Clublog doesn't provide this, so try DXCC data
         if not ituz:
-            dxcc_data = self.get_dxcc_data_for_callsign(call)
+            dxcc_data = self._get_dxcc_data_for_callsign(call)
             # Some DXCCs are in multiple zones, if so don't use the zone data as we can't be sure
             if dxcc_data and "itu" in dxcc_data and len(dxcc_data["itu"]) == 1:
                 ituz = dxcc_data["itu"]
         return ituz
 
-    # Get an emoji flag for a given DXCC entity ID
     def get_flag_for_dxcc(self, dxcc):
-        return self.DXCC_DATA[dxcc]["flag"] if dxcc in self.DXCC_DATA else None
+        """Get an emoji flag for a given DXCC entity ID"""
+
+        return self._dxcc_data[dxcc]["flag"] if dxcc in self._dxcc_data else None
 
-    # Infer an operator name from a callsign (requires QRZ.com/HamQTH)
     def infer_name_from_callsign_online_lookup(self, call):
-        data = self.get_qrz_data_for_callsign(call)
+        """Infer an operator name from a callsign (requires QRZ.com/HamQTH)"""
+
+        data = self._get_qrz_data_for_callsign(call)
         if data and "fname" in data:
             name = data["fname"]
             if "name" in data:
                 name = name + " " + data["name"]
             return name
-        data = self.get_hamqth_data_for_callsign(call)
+        data = self._get_hamqth_data_for_callsign(call)
         if data and "nick" in data:
             return data["nick"]
         else:
             return None
 
-    # Infer a latitude and longitude from a callsign (requires QRZ.com/HamQTH)
-    # Coordinates that look default are rejected (apologies if your position really is 0,0, enjoy your voyage)
     def infer_latlon_from_callsign_online_lookup(self, call):
-        data = self.get_qrz_data_for_callsign(call)
+        """Infer a latitude and longitude from a callsign (requires QRZ.com/HamQTH)
-        if data and "latitude" in data and "longitude" in data and (float(data["latitude"]) != 0 or float(data["longitude"]) != 0) and -89.9 < float(data["latitude"]) < 89.9:
+        Coordinates that look default are rejected (apologies if your position really is 0,0, enjoy your voyage)"""
-            return [data["latitude"], data["longitude"]]
+
-        data = self.get_hamqth_data_for_callsign(call)
+        data = self._get_qrz_data_for_callsign(call)
-        if data and "latitude" in data and "longitude" in data and (float(data["latitude"]) != 0 or float(data["longitude"]) != 0) and -89.9 < float(data["latitude"]) < 89.9:
+        if data and "latitude" in data and "longitude" in data and (
-            return [data["latitude"], data["longitude"]]
+                float(data["latitude"]) != 0 or float(data["longitude"]) != 0) and -89.9 < float(
+                data["latitude"]) < 89.9:
+            return [float(data["latitude"]), float(data["longitude"])]
+        data = self._get_hamqth_data_for_callsign(call)
+        if data and "latitude" in data and "longitude" in data and (
+                float(data["latitude"]) != 0 or float(data["longitude"]) != 0) and -89.9 < float(
+                data["latitude"]) < 89.9:
+            return [float(data["latitude"]), float(data["longitude"])]
         else:
             return None
 
-    # Infer a grid locator from a callsign (requires QRZ.com/HamQTH).
-    # Grids that look default are rejected (apologies if your grid really is AA00aa, enjoy your research)
     def infer_grid_from_callsign_online_lookup(self, call):
-        data = self.get_qrz_data_for_callsign(call)
+        """Infer a grid locator from a callsign (requires QRZ.com/HamQTH).
-        if data and "locator" in data and data["locator"].upper() != "AA00" and data["locator"].upper() != "AA00AA" and data["locator"].upper() != "AA00AA00":
+        Grids that look default are rejected (apologies if your grid really is AA00aa, enjoy your research)"""
+
+        data = self._get_qrz_data_for_callsign(call)
+        if data and "locator" in data and data["locator"].upper() != "AA00" and data["locator"].upper() != "AA00AA" and \
+                data["locator"].upper() != "AA00AA00":
             return data["locator"]
-        data = self.get_hamqth_data_for_callsign(call)
+        data = self._get_hamqth_data_for_callsign(call)
-        if data and "grid" in data and data["grid"].upper() != "AA00" and data["grid"].upper() != "AA00AA" and data["grid"].upper() != "AA00AA00":
+        if data and "grid" in data and data["grid"].upper() != "AA00" and data["grid"].upper() != "AA00AA" and data[
+            "grid"].upper() != "AA00AA00":
             return data["grid"]
         else:
             return None
 
-    # Infer a textual QTH from a callsign (requires QRZ.com/HamQTH)
     def infer_qth_from_callsign_online_lookup(self, call):
-        data = self.get_qrz_data_for_callsign(call)
+        """Infer a textual QTH from a callsign (requires QRZ.com/HamQTH)"""
+
+        data = self._get_qrz_data_for_callsign(call)
         if data and "addr2" in data:
             return data["addr2"]
-        data = self.get_hamqth_data_for_callsign(call)
+        data = self._get_hamqth_data_for_callsign(call)
         if data and "qth" in data:
             return data["qth"]
         else:
             return None
 
-    # Infer a latitude and longitude from a callsign (using DXCC, probably very inaccurate)
     def infer_latlon_from_callsign_dxcc(self, call):
+        """Infer a latitude and longitude from a callsign (using DXCC, probably very inaccurate)"""
+
         try:
-            data = self.CALL_INFO_BASIC.get_lat_long(call)
+            data = self._call_info_basic.get_lat_long(call)
             if data and "latitude" in data and "longitude" in data:
-                loc = [data["latitude"], data["longitude"]]
+                loc = [float(data["latitude"]), float(data["longitude"])]
             else:
                 loc = None
         except KeyError:
             loc = None
         # Couldn't get anything from basic call info database, try Clublog data
         if not loc:
-            data = self.get_clublog_xml_data_for_callsign(call)
+            data = self._get_clublog_xml_data_for_callsign(call)
             if data and "Lat" in data and "Lon" in data:
-                loc = [data["Lat"], data["Lon"]]
+                loc = [float(data["Lat"]), float(data["Lon"])]
         if not loc:
-            data = self.get_clublog_api_data_for_callsign(call)
+            data = self._get_clublog_api_data_for_callsign(call)
             if data and "Lat" in data and "Lon" in data:
-                loc = [data["Lat"], data["Lon"]]
+                loc = [float(data["Lat"]), float(data["Lon"])]
         return loc
 
-    # Infer a grid locator from a callsign (using DXCC, probably very inaccurate)
     def infer_grid_from_callsign_dxcc(self, call):
+        """Infer a grid locator from a callsign (using DXCC, probably very inaccurate)"""
+
         latlon = self.infer_latlon_from_callsign_dxcc(call)
         grid = None
         try:
@@ -425,8 +422,180 @@ class LookupHelper:
             logging.debug("Invalid lat/lon received for DXCC")
         return grid
 
-    # Infer a mode from the frequency (in Hz) according to the band plan. Just a guess really.
+    def _get_qrz_data_for_callsign(self, call):
-    def infer_mode_from_frequency(self, freq):
+        """Utility method to get QRZ.com data from cache if possible, if not get it from the API and cache it"""
+
+        # Fetch from cache if we can, otherwise fetch from the API and cache it
+        if call in self._qrz_callsign_data_cache:
+            return self._qrz_callsign_data_cache.get(call)
+        elif self._qrz_available:
+            try:
+                data = self._lookup_lib_qrz.lookup_callsign(callsign=call)
+                self._qrz_callsign_data_cache.add(call, data, expire=604800)  # 1 week in seconds
+                return data
+            except (KeyError, ValueError):
+                # QRZ had no info for the call, but maybe it had prefixes or suffixes. Try again with the base call.
+                try:
+                    data = self._lookup_lib_qrz.lookup_callsign(callsign=callinfo.Callinfo.get_homecall(call))
+                    self._qrz_callsign_data_cache.add(call, data, expire=604800)  # 1 week in seconds
+                    return data
+                except (KeyError, ValueError):
+                    # QRZ had no info for the call, that's OK. Cache a None so we don't try to look this up again
+                    self._qrz_callsign_data_cache.add(call, None, expire=604800)  # 1 week in seconds
+                    return None
+            except Exception:
+                # General exception like a timeout when communicating with QRZ. Return None this time, but don't cache
+                # that, so we can try again next time.
+                logging.error("Exception when looking up QRZ data")
+                return None
+        else:
+            return None
+
+    def _get_hamqth_data_for_callsign(self, call):
+        """Utility method to get HamQTH data from cache if possible, if not get it from the API and cache it"""
+
+        # Fetch from cache if we can, otherwise fetch from the API and cache it
+        if call in self._hamqth_callsign_data_cache:
+            return self._hamqth_callsign_data_cache.get(call)
+        elif self._hamqth_available:
+            try:
+                # First we need to log in and get a session token.
+                session_data = self._hamqth_session_lookup_cache.get(
+                    self._hamqth_base_url + "?u=" + urllib.parse.quote_plus(config["hamqth-username"]) +
+                    "&p=" + urllib.parse.quote_plus(config["hamqth-password"]), headers=HTTP_HEADERS).content
+                dict_data = xmltodict.parse(session_data)
+                if "session_id" in dict_data["HamQTH"]["session"]:
+                    session_id = dict_data["HamQTH"]["session"]["session_id"]
+
+                    # Now look up the actual data.
+                    try:
+                        lookup_data = SEMI_STATIC_URL_DATA_CACHE.get(
+                            self._hamqth_base_url + "?id=" + session_id + "&callsign=" + urllib.parse.quote_plus(
+                                call) + "&prg=" + HAMQTH_PRG, headers=HTTP_HEADERS).content
+                        data = xmltodict.parse(lookup_data)["HamQTH"]["search"]
+                        self._hamqth_callsign_data_cache.add(call, data, expire=604800)  # 1 week in seconds
+                        return data
+                    except (KeyError, ValueError):
+                        # HamQTH had no info for the call, but maybe it had prefixes or suffixes. Try again with the base call.
+                        try:
+                            lookup_data = SEMI_STATIC_URL_DATA_CACHE.get(
+                                self._hamqth_base_url + "?id=" + session_id + "&callsign=" + urllib.parse.quote_plus(
+                                    callinfo.Callinfo.get_homecall(call)) + "&prg=" + HAMQTH_PRG,
+                                headers=HTTP_HEADERS).content
+                            data = xmltodict.parse(lookup_data)["HamQTH"]["search"]
+                            self._hamqth_callsign_data_cache.add(call, data, expire=604800)  # 1 week in seconds
+                            return data
+                        except (KeyError, ValueError):
+                            # HamQTH had no info for the call, that's OK. Cache a None so we don't try to look this up again
+                            self._hamqth_callsign_data_cache.add(call, None, expire=604800)  # 1 week in seconds
+                            return None
+
+                else:
+                    logging.warning("HamQTH login details incorrect, failed to look up with HamQTH.")
+            except:
+                logging.error("Exception when looking up HamQTH data")
+                return None
+        return None
+
+    def _get_clublog_api_data_for_callsign(self, call):
+        """Utility method to get Clublog API data from cache if possible, if not get it from the API and cache it"""
+
+        # Fetch from cache if we can, otherwise fetch from the API and cache it
+        if call in self._clublog_callsign_data_cache:
+            return self._clublog_callsign_data_cache.get(call)
+        elif self._clublog_api_available:
+            try:
+                data = self._lookup_lib_clublog_api.lookup_callsign(callsign=call)
+                self._clublog_callsign_data_cache.add(call, data, expire=604800)  # 1 week in seconds
+                return data
+            except (KeyError, ValueError):
+                # Clublog had no info for the call, but maybe it had prefixes or suffixes. Try again with the base call.
+                try:
+                    data = self._lookup_lib_clublog_api.lookup_callsign(callsign=callinfo.Callinfo.get_homecall(call))
+                    self._clublog_callsign_data_cache.add(call, data, expire=604800)  # 1 week in seconds
+                    return data
+                except (KeyError, ValueError):
+                    # Clublog had no info for the call, that's OK. Cache a None so we don't try to look this up again
+                    self._clublog_callsign_data_cache.add(call, None, expire=604800)  # 1 week in seconds
+                    return None
+            except APIKeyMissingError:
+                # User API key was wrong, warn
+                logging.error("Could not look up via Clublog API, key " + self._clublog_api_key + " was rejected.")
+                return None
+        else:
+            return None
+
+    def _get_clublog_xml_data_for_callsign(self, call):
+        """Utility method to get Clublog XML data from file"""
+
+        if self._clublog_xml_available:
+            try:
+                data = self._lookup_lib_clublog_xml.lookup_callsign(callsign=call)
+                return data
+            except (KeyError, ValueError):
+                # Clublog had no info for the call, that's OK. Cache a None so we don't try to look this up again
+                self._clublog_callsign_data_cache.add(call, None, expire=604800)  # 1 week in seconds
+                return None
+        else:
+            return None
+
+    def _get_dxcc_data_for_callsign(self, call):
+        """Utility method to get generic DXCC data from our lookup table, if we can find it"""
+
+        for entry in self._dxcc_data.values():
+            if entry["_prefixRegexCompiled"].match(call):
+                return entry
+        return None
+
+    def stop(self):
+        """Shutdown method to close down any caches neatly."""
+
+        self._qrz_callsign_data_cache.close()
+        self._clublog_callsign_data_cache.close()
+
+
+# Singleton object
+lookup_helper = LookupHelper()
+
+def infer_mode_from_comment(comment):
+    """Infer a mode from the comment"""
+
+    for mode in ALL_MODES:
+        if mode in comment.upper():
+            return mode
+    for mode in MODE_ALIASES.keys():
+        if mode in comment.upper():
+            return MODE_ALIASES[mode]
+    return None
+
+
+def infer_mode_type_from_mode(mode):
+    """Infer a "mode family" from a mode."""
+
+    if mode.upper() in CW_MODES:
+        return "CW"
+    elif mode.upper() in PHONE_MODES:
+        return "PHONE"
+    elif mode.upper() in DATA_MODES:
+        return "DATA"
+    else:
+        if mode.upper() != "OTHER":
+            logging.warning("Found an unrecognised mode: " + mode + ". Developer should categorise this.")
+        return None
+
+
+def infer_band_from_freq(freq):
+    """Infer a band from a frequency in Hz"""
+
+    for b in BANDS:
+        if b.start_freq <= freq <= b.end_freq:
+            return b
+    return UNKNOWN_BAND
+
+
+def infer_mode_from_frequency(freq):
+    """Infer a mode from the frequency (in Hz) according to the band plan. Just a guess really."""
+
     try:
         khz = freq / 1000.0
         mode = freq_to_band(khz)["mode"]
@@ -444,130 +613,3 @@ class LookupHelper:
         return mode
     except KeyError:
         return None
-
-    # Utility method to get QRZ.com data from cache if possible, if not get it from the API and cache it
-    def get_qrz_data_for_callsign(self, call):
-        # Fetch from cache if we can, otherwise fetch from the API and cache it
-        if call in self.QRZ_CALLSIGN_DATA_CACHE:
-            return self.QRZ_CALLSIGN_DATA_CACHE.get(call)
-        elif self.QRZ_AVAILABLE:
-            try:
-                data = self.LOOKUP_LIB_QRZ.lookup_callsign(callsign=call)
-                self.QRZ_CALLSIGN_DATA_CACHE.add(call, data, expire=604800)  # 1 week in seconds
-                return data
-            except (KeyError, ValueError):
-                # QRZ had no info for the call, but maybe it had prefixes or suffixes. Try again with the base call.
-                try:
-                    data = self.LOOKUP_LIB_QRZ.lookup_callsign(callsign=callinfo.Callinfo.get_homecall(call))
-                    self.QRZ_CALLSIGN_DATA_CACHE.add(call, data, expire=604800)  # 1 week in seconds
-                    return data
-                except (KeyError, ValueError):
-                    # QRZ had no info for the call, that's OK. Cache a None so we don't try to look this up again
-                    self.QRZ_CALLSIGN_DATA_CACHE.add(call, None, expire=604800)  # 1 week in seconds
-                    return None
-            except (Exception):
-                # General exception like a timeout when communicating with QRZ. Return None this time, but don't cache
-                # that, so we can try again next time.
-                logging.error("Exception when looking up QRZ data")
-                return None
-        else:
-            return None
-
-    # Utility method to get HamQTH data from cache if possible, if not get it from the API and cache it
-    def get_hamqth_data_for_callsign(self, call):
-        # Fetch from cache if we can, otherwise fetch from the API and cache it
-        if call in self.HAMQTH_CALLSIGN_DATA_CACHE:
-            return self.HAMQTH_CALLSIGN_DATA_CACHE.get(call)
-        elif self.HAMQTH_AVAILABLE:
-            try:
-                # First we need to log in and get a session token.
-                session_data = self.HAMQTH_SESSION_LOOKUP_CACHE.get(
-                    self.HAMQTH_BASE_URL + "?u=" + urllib.parse.quote_plus(config["hamqth-username"]) +
-                    "&p=" + urllib.parse.quote_plus(config["hamqth-password"]), headers=HTTP_HEADERS).content
-                dict_data = xmltodict.parse(session_data)
-                if "session_id" in dict_data["HamQTH"]["session"]:
-                    session_id = dict_data["HamQTH"]["session"]["session_id"]
-
-                    # Now look up the actual data.
-                    try:
-                        lookup_data = SEMI_STATIC_URL_DATA_CACHE.get(
-                            self.HAMQTH_BASE_URL + "?id=" + session_id + "&callsign=" + urllib.parse.quote_plus(
-                                call) + "&prg=" + HAMQTH_PRG, headers=HTTP_HEADERS).content
-                        data = xmltodict.parse(lookup_data)["HamQTH"]["search"]
-                        self.HAMQTH_CALLSIGN_DATA_CACHE.add(call, data, expire=604800)  # 1 week in seconds
-                        return data
-                    except (KeyError, ValueError):
-                        # HamQTH had no info for the call, but maybe it had prefixes or suffixes. Try again with the base call.
-                        try:
-                            lookup_data = SEMI_STATIC_URL_DATA_CACHE.get(
-                                self.HAMQTH_BASE_URL + "?id=" + session_id + "&callsign=" + urllib.parse.quote_plus(
-                                    callinfo.Callinfo.get_homecall(call)) + "&prg=" + HAMQTH_PRG, headers=HTTP_HEADERS).content
-                            data = xmltodict.parse(lookup_data)["HamQTH"]["search"]
-                            self.HAMQTH_CALLSIGN_DATA_CACHE.add(call, data, expire=604800)  # 1 week in seconds
-                            return data
-                        except (KeyError, ValueError):
-                            # HamQTH had no info for the call, that's OK. Cache a None so we don't try to look this up again
-                            self.HAMQTH_CALLSIGN_DATA_CACHE.add(call, None, expire=604800)  # 1 week in seconds
-                            return None
-
-                else:
-                    logging.warn("HamQTH login details incorrect, failed to look up with HamQTH.")
-            except:
-                logging.error("Exception when looking up HamQTH data")
-                return None
-
-    # Utility method to get Clublog API data from cache if possible, if not get it from the API and cache it
-    def get_clublog_api_data_for_callsign(self, call):
-        # Fetch from cache if we can, otherwise fetch from the API and cache it
-        if call in self.CLUBLOG_CALLSIGN_DATA_CACHE:
-            return self.CLUBLOG_CALLSIGN_DATA_CACHE.get(call)
-        elif self.CLUBLOG_API_AVAILABLE:
-            try:
-                data = self.LOOKUP_LIB_CLUBLOG_API.lookup_callsign(callsign=call)
-                self.CLUBLOG_CALLSIGN_DATA_CACHE.add(call, data, expire=604800)  # 1 week in seconds
-                return data
-            except (KeyError, ValueError):
-                # Clublog had no info for the call, but maybe it had prefixes or suffixes. Try again with the base call.
-                try:
-                    data = self.LOOKUP_LIB_CLUBLOG_API.lookup_callsign(callsign=callinfo.Callinfo.get_homecall(call))
-                    self.CLUBLOG_CALLSIGN_DATA_CACHE.add(call, data, expire=604800)  # 1 week in seconds
-                    return data
-                except (KeyError, ValueError):
-                    # Clublog had no info for the call, that's OK. Cache a None so we don't try to look this up again
-                    self.CLUBLOG_CALLSIGN_DATA_CACHE.add(call, None, expire=604800)  # 1 week in seconds
-                    return None
-            except APIKeyMissingError:
-                # User API key was wrong, warn
-                logging.error("Could not look up via Clublog API, key " + self.CLUBLOG_API_KEY + " was rejected.")
-                return None
-        else:
-            return None
-
-    # Utility method to get Clublog XML data from file
-    def get_clublog_xml_data_for_callsign(self, call):
-        if self.CLUBLOG_XML_AVAILABLE:
-            try:
-                data = self.LOOKUP_LIB_CLUBLOG_XML.lookup_callsign(callsign=call)
-                return data
-            except (KeyError, ValueError):
-                # Clublog had no info for the call, that's OK. Cache a None so we don't try to look this up again
-                self.CLUBLOG_CALLSIGN_DATA_CACHE.add(call, None, expire=604800)  # 1 week in seconds
-                return None
-        else:
-            return None
-
-    # Utility method to get generic DXCC data from our lookup table, if we can find it
-    def get_dxcc_data_for_callsign(self, call):
-        for entry in self.DXCC_DATA.values():
-            if re.match(entry["prefixRegex"], call):
-                return entry
-        return None
-
-    # Shutdown method to close down any caches neatly.
-    def stop(self):
-        self.QRZ_CALLSIGN_DATA_CACHE.close()
-        self.CLUBLOG_CALLSIGN_DATA_CACHE.close()
-
-
-# Singleton object
-lookup_helper = LookupHelper()

core/prometheus_metrics_handler.py

@@ -31,6 +31,7 @@ memory_use_gauge = Gauge(
 )
 
 
-# Get a Prometheus metrics response for the web server
 def get_metrics():
+    """Get a Prometheus metrics response for the web server"""
+
     return generate_latest(registry)

core/sig_utils.py

@@ -8,18 +8,20 @@ from core.constants import SIGS, HTTP_HEADERS
 from core.geo_utils import wab_wai_square_to_lat_lon
 
 
-# Utility function to get the regex string for a SIG reference for a named SIG. If no match is found, None will be returned.
 def get_ref_regex_for_sig(sig):
+    """Utility function to get the regex string for a SIG reference for a named SIG. If no match is found, None will be returned."""
+
     for s in SIGS:
         if s.name.upper() == sig.upper():
             return s.ref_regex
     return None
 
 
-# Look up details of a SIG reference (e.g. POTA park) such as name, lat/lon, and grid. Takes in a sig_ref object which
-# must at minimum have a "sig" and an "id". The rest of the object will be populated and returned.
-# Note there is currently no support for KRMNPA location lookup, see issue #61.
 def populate_sig_ref_info(sig_ref):
+    """Look up details of a SIG reference (e.g. POTA park) such as name, lat/lon, and grid. Takes in a sig_ref object which
+    must at minimum have a "sig" and an "id". The rest of the object will be populated and returned.
+    Note there is currently no support for KRMNPA location lookup, see issue #61."""
+
     if sig_ref.sig is None or sig_ref.id is None:
         logging.warning("Failed to look up sig_ref info, sig or id were not set.")
 
@@ -75,7 +77,8 @@ def populate_sig_ref_info(sig_ref):
                     sig_ref.url = "https://wwff.co/directory/?showRef=" + ref_id
                     sig_ref.grid = row["iaruLocator"] if "iaruLocator" in row and row["iaruLocator"] != "-" else None
                     sig_ref.latitude = float(row["latitude"]) if "latitude" in row and row["latitude"] != "-" else None
-                    sig_ref.longitude = float(row["longitude"]) if "longitude" in row and row["longitude"] != "-" else None
+                    sig_ref.longitude = float(row["longitude"]) if "longitude" in row and row[
+                        "longitude"] != "-" else None
                     break
         elif sig.upper() == "SIOTA":
             siota_csv_data = SEMI_STATIC_URL_DATA_CACHE.get("https://www.silosontheair.com/data/silos.csv",
@@ -124,7 +127,8 @@ def populate_sig_ref_info(sig_ref):
                 sig_ref.name = sig_ref.id
             sig_ref.url = "https://www.beachesontheair.com/beaches/" + sig_ref.name.lower().replace(" ", "-")
         elif sig.upper() == "LLOTA":
-            data = SEMI_STATIC_URL_DATA_CACHE.get("https://llota.app/api/public/references", headers=HTTP_HEADERS).json()
+            data = SEMI_STATIC_URL_DATA_CACHE.get("https://llota.app/api/public/references",
+                                                  headers=HTTP_HEADERS).json()
             if data:
                 for ref in data:
                     if ref["reference_code"] == ref_id:

core/status_reporter.py

@@ -1,6 +1,6 @@
 import os
 from datetime import datetime
-from threading import Timer
+from threading import Thread, Event
 
 import psutil
 import pytz
@@ -10,70 +10,82 @@ from core.constants import SOFTWARE_VERSION
 from core.prometheus_metrics_handler import memory_use_gauge, spots_gauge, alerts_gauge
 
 
-# Provides a timed update of the application's status data.
 class StatusReporter:
+    """Provides a timed update of the application's status data."""
 
-    # Constructor
     def __init__(self, status_data, run_interval, web_server, cleanup_timer, spots, spot_providers, alerts,
                  alert_providers):
-        self.status_data = status_data
+        """Constructor"""
-        self.run_interval = run_interval
-        self.web_server = web_server
-        self.cleanup_timer = cleanup_timer
-        self.spots = spots
-        self.spot_providers = spot_providers
-        self.alerts = alerts
-        self.alert_providers = alert_providers
-        self.run_timer = None
-        self.startup_time = datetime.now(pytz.UTC)
 
-        self.status_data["software-version"] = SOFTWARE_VERSION
+        self._status_data = status_data
-        self.status_data["server-owner-callsign"] = SERVER_OWNER_CALLSIGN
+        self._run_interval = run_interval
+        self._web_server = web_server
+        self._cleanup_timer = cleanup_timer
+        self._spots = spots
+        self._spot_providers = spot_providers
+        self._alerts = alerts
+        self._alert_providers = alert_providers
+        self._thread = None
+        self._stop_event = Event()
+        self._startup_time = datetime.now(pytz.UTC)
+
+        self._status_data["software-version"] = SOFTWARE_VERSION
+        self._status_data["server-owner-callsign"] = SERVER_OWNER_CALLSIGN
 
-    # Start the cleanup timer
     def start(self):
-        self.run()
+        """Start the reporter thread"""
+
+        self._thread = Thread(target=self._run, daemon=True)
+        self._thread.start()
 
-    # Stop any threads and prepare for application shutdown
     def stop(self):
-        self.run_timer.cancel()
+        """Stop any threads and prepare for application shutdown"""
 
-    # Write status information and reschedule next timer
+        self._stop_event.set()
-    def run(self):
+
-        self.status_data["uptime"] = (datetime.now(pytz.UTC) - self.startup_time).total_seconds()
+    def _run(self):
-        self.status_data["mem_use_mb"] = round(psutil.Process(os.getpid()).memory_info().rss / (1024 * 1024), 3)
+        """Thread entry point: report immediately on startup, then on each interval until stopped"""
-        self.status_data["num_spots"] = len(self.spots)
+
-        self.status_data["num_alerts"] = len(self.alerts)
+        while True:
-        self.status_data["spot_providers"] = list(
+            self._report()
+            if self._stop_event.wait(timeout=self._run_interval):
+                break
+
+    def _report(self):
+        """Write status information"""
+
+        self._status_data["uptime"] = (datetime.now(pytz.UTC) - self._startup_time).total_seconds()
+        self._status_data["mem_use_mb"] = round(psutil.Process(os.getpid()).memory_info().rss / (1024 * 1024), 3)
+        self._status_data["num_spots"] = len(self._spots)
+        self._status_data["num_alerts"] = len(self._alerts)
+        self._status_data["spot_providers"] = list(
             map(lambda p: {"name": p.name, "enabled": p.enabled, "status": p.status,
                            "last_updated": p.last_update_time.replace(
                                tzinfo=pytz.UTC).timestamp() if p.last_update_time.year > 2000 else 0,
                            "last_spot": p.last_spot_time.replace(
-                               tzinfo=pytz.UTC).timestamp() if p.last_spot_time.year > 2000 else 0}, self.spot_providers))
+                               tzinfo=pytz.UTC).timestamp() if p.last_spot_time.year > 2000 else 0},
-        self.status_data["alert_providers"] = list(
+                self._spot_providers))
+        self._status_data["alert_providers"] = list(
             map(lambda p: {"name": p.name, "enabled": p.enabled, "status": p.status,
                            "last_updated": p.last_update_time.replace(
                                tzinfo=pytz.UTC).timestamp() if p.last_update_time.year > 2000 else 0},
-                self.alert_providers))
+                self._alert_providers))
-        self.status_data["cleanup"] = {"status": self.cleanup_timer.status,
+        self._status_data["cleanup"] = {"status": self._cleanup_timer.status,
-                                       "last_ran": self.cleanup_timer.last_cleanup_time.replace(
+                                        "last_ran": self._cleanup_timer.last_cleanup_time.replace(
-                                           tzinfo=pytz.UTC).timestamp() if self.cleanup_timer.last_cleanup_time else 0}
+                                            tzinfo=pytz.UTC).timestamp() if self._cleanup_timer.last_cleanup_time else 0}
-        self.status_data["webserver"] = {"status": self.web_server.web_server_metrics["status"],
+        self._status_data["webserver"] = {"status": self._web_server.web_server_metrics["status"],
-                                         "last_api_access": self.web_server.web_server_metrics[
+                                          "last_api_access": self._web_server.web_server_metrics[
                                               "last_api_access_time"].replace(
-                                             tzinfo=pytz.UTC).timestamp() if self.web_server.web_server_metrics[
+                                              tzinfo=pytz.UTC).timestamp() if self._web_server.web_server_metrics[
                                               "last_api_access_time"] else 0,
-                                         "api_access_count": self.web_server.web_server_metrics["api_access_counter"],
+                                          "api_access_count": self._web_server.web_server_metrics["api_access_counter"],
-                                         "last_page_access": self.web_server.web_server_metrics[
+                                          "last_page_access": self._web_server.web_server_metrics[
                                               "last_page_access_time"].replace(
-                                             tzinfo=pytz.UTC).timestamp() if self.web_server.web_server_metrics[
+                                              tzinfo=pytz.UTC).timestamp() if self._web_server.web_server_metrics[
                                               "last_page_access_time"] else 0,
-                                         "page_access_count": self.web_server.web_server_metrics["page_access_counter"]}
+                                          "page_access_count": self._web_server.web_server_metrics["page_access_counter"]}
 
         # Update Prometheus metrics
-        memory_use_gauge.set(psutil.Process(os.getpid()).memory_info().rss * 1024)
+        memory_use_gauge.set(psutil.Process(os.getpid()).memory_info().rss)
-        spots_gauge.set(len(self.spots))
+        spots_gauge.set(len(self._spots))
-        alerts_gauge.set(len(self.alerts))
+        alerts_gauge.set(len(self._alerts))
-
-        self.run_timer = Timer(self.run_interval, self.run)
-        self.run_timer.start()

core/utils.py

@@ -1,5 +1,15 @@
-# Convert objects to serialisable things. Used by JSON serialiser as a default when it encounters unserializable things.
-# Just converts objects to dict. Try to avoid doing anything clever here when serialising spots, because we also need
-# to receive spots without complex handling.
 def serialize_everything(obj):
+    """Convert objects to serialisable things. Used by JSON serialiser as a default when it encounters unserializable things.
+    Just converts objects to dict. Try to avoid doing anything clever here when serialising spots, because we also need
+    to receive spots without complex handling."""
     return obj.__dict__
+
+
+def empty_queue(q):
+    """Empty a queue"""
+
+    while not q.empty():
+        try:
+            q.get_nowait()
+        except:
+            break

data/alert.py

@@ -10,9 +10,10 @@ from core.lookup_helper import lookup_helper
 from core.sig_utils import populate_sig_ref_info
 
 
-# Data class that defines an alert.
 @dataclass
 class Alert:
+    """Data class that defines an alert."""
+
     # Unique identifier for the alert
     id: str = None
     # Callsigns of the operators that has been alerted
@@ -60,8 +61,9 @@ class Alert:
     # The ID the source gave it, if any.
     source_id: str = None
 
-    # Infer missing parameters where possible
     def infer_missing(self):
+        """Infer missing parameters where possible"""
+
         # If we somehow don't have a start time, set it to zero so it sorts off the bottom of any list but
         # clients can still reliably parse it as a number.
         if not self.start_time:
@@ -79,7 +81,8 @@ class Alert:
         if self.received_time and not self.received_time_iso:
             self.received_time_iso = datetime.fromtimestamp(self.received_time, pytz.UTC).isoformat()
 
-        # DX country, continent, zones etc. from callsign
+        # DX country, continent, zones etc. from callsign. CQ/ITU zone are better looked up with a location but we don't
+        # have a real location for alerts.
         if self.dx_calls and self.dx_calls[0] and not self.dx_country:
             self.dx_country = lookup_helper.infer_country_from_callsign(self.dx_calls[0])
         if self.dx_calls and self.dx_calls[0] and not self.dx_continent:
@@ -102,7 +105,7 @@ class Alert:
 
         # If the spot itself doesn't have a SIG yet, but we have at least one SIG reference, take that reference's SIG
         # and apply it to the whole spot.
-        if self.sig_refs and len(self.sig_refs) > 0 and not self.sig:
+        if self.sig_refs and len(self.sig_refs) > 0 and self.sig_refs[0] and not self.sig:
             self.sig = self.sig_refs[0].sig
 
         # DX operator details lookup, using QRZ.com. This should be the last resort compared to taking the data from
@@ -121,14 +124,16 @@ class Alert:
         self_copy.received_time_iso = ""
         self.id = hashlib.sha256(str(self_copy).encode("utf-8")).hexdigest()
 
-    # JSON serialise
     def to_json(self):
+        """JSON serialise"""
+
         return json.dumps(self, default=lambda o: o.__dict__, sort_keys=True)
 
-    # Decide if this alert has expired (in which case it should not be added to the system in the first place, and not
-    # returned by the web server if later requested, and removed by the cleanup functions). "Expired" is defined as
-    # either having an end_time in the past, or if it only has a start_time, then that start time was more than 3 hours
-    # ago. If it somehow doesn't have a start_time either, it is considered to be expired.
     def expired(self):
+        """Decide if this alert has expired (in which case it should not be added to the system in the first place, and not
+        returned by the web server if later requested, and removed by the cleanup functions). "Expired" is defined as
+        either having an end_time in the past, or if it only has a start_time, then that start time was more than 3 hours
+        ago. If it somehow doesn't have a start_time either, it is considered to be expired."""
+
         return not self.start_time or (self.end_time and self.end_time < datetime.now(pytz.UTC).timestamp()) or (
                 not self.end_time and self.start_time < (datetime.now(pytz.UTC) - timedelta(hours=3)).timestamp())

data/band.py

@@ -1,8 +1,10 @@
 from dataclasses import dataclass
 
-# Data class that defines a band.
+
 @dataclass
 class Band:
+    """Data class that defines a band."""
+
     # Band name
     name: str
     # Start frequency, in Hz

data/sig.py

@@ -1,8 +1,10 @@
 from dataclasses import dataclass
 
-# Data class that defines a Special Interest Group.
+
 @dataclass
 class SIG:
+    """Data class that defines a Special Interest Group."""
+
     # SIG name, e.g. "POTA"
     name: str
     # Description, e.g. "Parks on the Air"

data/sig_ref.py

@@ -1,9 +1,11 @@
 from dataclasses import dataclass
 
-# Data class that defines a Special Interest Group "info" or reference. As well as the basic reference ID we include a
+
-# name and a lookup URL.
 @dataclass
 class SIGRef:
+    """Data class that defines a Special Interest Group "info" or reference. As well as the basic reference ID we include a
+    name and a lookup URL."""
+
     # Reference ID, e.g. "GB-0001".
     id: str
     # SIG that this reference is in, e.g. "POTA".

data/spot.py

@@ -11,14 +11,17 @@ from pyhamtools.locator import locator_to_latlong, latlong_to_locator
 
 from core.config import MAX_SPOT_AGE
 from core.constants import MODE_ALIASES
-from core.lookup_helper import lookup_helper
+from core.geo_utils import lat_lon_to_cq_zone, lat_lon_to_itu_zone
+from core.lookup_helper import lookup_helper, infer_band_from_freq, infer_mode_from_comment, infer_mode_from_frequency, \
+    infer_mode_type_from_mode
 from core.sig_utils import populate_sig_ref_info, ANY_SIG_REGEX, get_ref_regex_for_sig
 from data.sig_ref import SIGRef
 
 
-# Data class that defines a spot.
 @dataclass
 class Spot:
+    """Data class that defines a spot."""
+
     # Unique identifier for the spot
     id: str = None
 
@@ -128,8 +131,9 @@ class Spot:
     # The ID the source gave it, if any.
     source_id: str = None
 
-    # Infer missing parameters where possible
     def infer_missing(self):
+        """Infer missing parameters where possible"""
+
         # If we somehow don't have a spot time, set it to zero so it sorts off the bottom of any list but
         # clients can still reliably parse it as a number.
         if not self.time:
@@ -152,15 +156,11 @@ class Spot:
             if len(split) > 1 and split[1] != "#":
                 self.dx_ssid = split[1]
 
-        # DX country, continent, zones etc. from callsign
+        # DX country, continent etc. from callsign
         if self.dx_call and not self.dx_country:
             self.dx_country = lookup_helper.infer_country_from_callsign(self.dx_call)
         if self.dx_call and not self.dx_continent:
             self.dx_continent = lookup_helper.infer_continent_from_callsign(self.dx_call)
-        if self.dx_call and not self.dx_cq_zone:
-            self.dx_cq_zone = lookup_helper.infer_cq_zone_from_callsign(self.dx_call)
-        if self.dx_call and not self.dx_itu_zone:
-            self.dx_itu_zone = lookup_helper.infer_itu_zone_from_callsign(self.dx_call)
         if self.dx_call and not self.dx_dxcc_id:
             self.dx_dxcc_id = lookup_helper.infer_dxcc_id_from_callsign(self.dx_call)
         if self.dx_dxcc_id and not self.dx_flag:
@@ -189,7 +189,8 @@ class Spot:
 
         # Spotter country, continent, zones etc. from callsign.
         # DE call with no digits, or APRS servers starting "T2" are not things we can look up location for
-        if self.de_call and any(char.isdigit() for char in self.de_call) and not (self.de_call.startswith("T2") and self.source == "APRS-IS"):
+        if self.de_call and any(char.isdigit() for char in self.de_call) and not (
+                self.de_call.startswith("T2") and self.source == "APRS-IS"):
             if not self.de_country:
                 self.de_country = lookup_helper.infer_country_from_callsign(self.de_call)
             if not self.de_continent:
@@ -201,17 +202,17 @@ class Spot:
 
         # Band from frequency
         if self.freq and not self.band:
-            band = lookup_helper.infer_band_from_freq(self.freq)
+            band = infer_band_from_freq(self.freq)
             self.band = band.name
 
         # Mode from comments or bandplan
         if self.mode:
             self.mode_source = "SPOT"
         if self.comment and not self.mode:
-            self.mode = lookup_helper.infer_mode_from_comment(self.comment)
+            self.mode = infer_mode_from_comment(self.comment)
             self.mode_source = "COMMENT"
         if self.freq and not self.mode:
-            self.mode = lookup_helper.infer_mode_from_frequency(self.freq)
+            self.mode = infer_mode_from_frequency(self.freq)
             self.mode_source = "BANDPLAN"
 
         # Normalise mode if necessary.
@@ -220,7 +221,7 @@ class Spot:
 
         # Mode type from mode
         if self.mode and not self.mode_type:
-            self.mode_type = lookup_helper.infer_mode_type_from_mode(self.mode)
+            self.mode_type = infer_mode_type_from_mode(self.mode)
 
         # If we have a latitude or grid at this point, it can only have been provided by the spot itself
         if self.dx_latitude or self.dx_grid:
@@ -238,7 +239,7 @@ class Spot:
             if regex:
                 all_comment_ref_matches = re.finditer(r"(^|\W)(" + regex + r")(^|\W)", self.comment, re.IGNORECASE)
                 for ref_match in all_comment_ref_matches:
-                    self.append_sig_ref_if_missing(SIGRef(id=ref_match.group(2).upper(), sig=sig))
+                    self._append_sig_ref_if_missing(SIGRef(id=ref_match.group(2).upper(), sig=sig))
 
         # See if the comment looks like it contains any SIGs (and optionally SIG references) that we can
         # add to the spot. This should catch cluster spot comments like "POTA GB-0001 WWFF GFF-0001" and e.g. POTA
@@ -256,9 +257,10 @@ class Spot:
                 # If so, add that to the sig_refs list for this spot.
                 ref_regex = get_ref_regex_for_sig(found_sig)
                 if ref_regex:
-                    ref_matches = re.finditer(r"(^|\W)" + found_sig + r"($|\W)(" + ref_regex + r")($|\W)", self.comment, re.IGNORECASE)
+                    ref_matches = re.finditer(r"(^|\W)" + found_sig + r"($|\W)(" + ref_regex + r")($|\W)", self.comment,
+                                              re.IGNORECASE)
                     for ref_match in ref_matches:
-                        self.append_sig_ref_if_missing(SIGRef(id=ref_match.group(3).upper(), sig=found_sig))
+                        self._append_sig_ref_if_missing(SIGRef(id=ref_match.group(3).upper(), sig=found_sig))
 
         # Fetch SIG data. In case a particular API doesn't provide a full set of name, lat, lon & grid for a reference
         # in its initial call, we use this code to populate the rest of the data. This includes working out grid refs
@@ -285,7 +287,6 @@ class Spot:
         # DX Grid to lat/lon and vice versa in case one is missing
         if self.dx_grid and not self.dx_latitude:
             try:
-                print(json.dumps(self))
                 ll = locator_to_latlong(self.dx_grid)
                 self.dx_latitude = ll[0]
                 self.dx_longitude = ll[1]
@@ -332,6 +333,18 @@ class Spot:
                 self.dx_grid = lookup_helper.infer_grid_from_callsign_dxcc(self.dx_call)
                 self.dx_location_source = "DXCC"
 
+        # CQ and ITU zone lookup, preferably from location but failing that, from callsign
+        if not self.dx_cq_zone:
+            if self.dx_latitude:
+                self.dx_cq_zone = lat_lon_to_cq_zone(self.dx_latitude, self.dx_longitude)
+            elif self.dx_call:
+                self.dx_cq_zone = lookup_helper.infer_cq_zone_from_callsign(self.dx_call)
+        if not self.dx_itu_zone:
+            if self.dx_latitude:
+                self.dx_itu_zone = lat_lon_to_itu_zone(self.dx_latitude, self.dx_longitude)
+            elif self.dx_call:
+                self.dx_itu_zone = lookup_helper.infer_itu_zone_from_callsign(self.dx_call)
+
         # DX Location is "good" if it is from a spot, or from QRZ if the callsign doesn't contain a slash, so the operator
         # is likely at home.
         self.dx_location_good = self.dx_latitude and self.dx_longitude and (
@@ -340,7 +353,8 @@ class Spot:
                 or (self.dx_location_source == "HOME QTH" and not "/" in self.dx_call))
 
         # DE with no digits and APRS servers starting "T2" are not things we can look up location for
-        if self.de_call and any(char.isdigit() for char in self.de_call) and not (self.de_call.startswith("T2") and self.source == "APRS-IS"):
+        if self.de_call and any(char.isdigit() for char in self.de_call) and not (
+                self.de_call.startswith("T2") and self.source == "APRS-IS"):
             # DE operator position lookup, using QRZ.com.
             if not self.de_latitude:
                 latlon = lookup_helper.infer_latlon_from_callsign_online_lookup(self.de_call)
@@ -367,12 +381,14 @@ class Spot:
         self_copy.received_time_iso = ""
         self.id = hashlib.sha256(str(self_copy).encode("utf-8")).hexdigest()
 
-    # JSON sspoterialise
     def to_json(self):
+        """JSON serialise"""
+
         return json.dumps(self, default=lambda o: o.__dict__, sort_keys=True)
 
-    # Append a sig_ref to the list, so long as it's not already there.
+    def _append_sig_ref_if_missing(self, new_sig_ref):
-    def append_sig_ref_if_missing(self, new_sig_ref):
+        """Append a sig_ref to the list, so long as it's not already there."""
+
         if not self.sig_refs:
             self.sig_refs = []
         new_sig_ref.id = new_sig_ref.id.strip().upper()
@@ -384,9 +400,10 @@ class Spot:
                 return
         self.sig_refs.append(new_sig_ref)
 
-    # Decide if this spot has expired (in which case it should not be added to the system in the first place, and not
-    # returned by the web server if later requested, and removed by the cleanup functions). "Expired" is defined as
-    # either having a time further ago than the server's MAX_SPOT_AGE. If it somehow doesn't have a time either, it is
-    # considered to be expired.
     def expired(self):
+        """Decide if this spot has expired (in which case it should not be added to the system in the first place, and not
+        returned by the web server if later requested, and removed by the cleanup functions). "Expired" is defined as
+        either having a time further ago than the server's MAX_SPOT_AGE. If it somehow doesn't have a time either, it is
+        considered to be expired."""
+
         return not self.time or self.time < (datetime.now(pytz.UTC) - timedelta(seconds=MAX_SPOT_AGE)).timestamp()

requirements.txt

@@ -15,3 +15,4 @@ beautifulsoup4~=4.14.2
 websocket-client~=1.9.0
 tornado~=6.5.4
 tornado_eventsource~=3.0.0
+geopandas~=1.1.2

server/handlers/api/addspot.py

@@ -8,7 +8,7 @@ import tornado
 
 from core.config import ALLOW_SPOTTING, MAX_SPOT_AGE
 from core.constants import UNKNOWN_BAND
-from core.lookup_helper import lookup_helper
+from core.lookup_helper import infer_band_from_freq
 from core.prometheus_metrics_handler import api_requests_counter
 from core.sig_utils import get_ref_regex_for_sig
 from core.utils import serialize_everything
@@ -16,18 +16,19 @@ from data.sig_ref import SIGRef
 from data.spot import Spot
 
 
-# API request handler for /api/v1/spot (POST)
 class APISpotHandler(tornado.web.RequestHandler):
+    """API request handler for /api/v1/spot (POST)"""
+
     def initialize(self, spots, web_server_metrics):
-        self.spots = spots
+        self._spots = spots
-        self.web_server_metrics = web_server_metrics
+        self._web_server_metrics = web_server_metrics
 
     def post(self):
         try:
             # Metrics
-            self.web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
+            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self.web_server_metrics["api_access_counter"] += 1
+            self._web_server_metrics["api_access_counter"] += 1
-            self.web_server_metrics["status"] = "OK"
+            self._web_server_metrics["status"] = "OK"
             api_requests_counter.inc()
 
             # Reject if not allowed
@@ -40,9 +41,11 @@ class APISpotHandler(tornado.web.RequestHandler):
                 return
 
             # Reject if format not json
-            if 'Content-Type' not in self.request.headers or self.request.headers.get('Content-Type') != "application/json":
+            if 'Content-Type' not in self.request.headers or self.request.headers.get(
+                    'Content-Type') != "application/json":
                 self.set_status(415)
-                self.write(json.dumps("Error - request Content-Type must be application/json", default=serialize_everything))
+                self.write(
+                    json.dumps("Error - request Content-Type must be application/json", default=serialize_everything))
                 self.set_header("Cache-Control", "no-store")
                 self.set_header("Content-Type", "application/json")
                 return
@@ -94,7 +97,7 @@ class APISpotHandler(tornado.web.RequestHandler):
                 return
 
             # Reject if frequency not in a known band
-            if lookup_helper.infer_band_from_freq(spot.freq) == UNKNOWN_BAND:
+            if infer_band_from_freq(spot.freq) == UNKNOWN_BAND:
                 self.set_status(422)
                 self.write(json.dumps("Error - Frequency of " + str(spot.freq / 1000.0) + "kHz is not in a known band.",
                                       default=serialize_everything))
@@ -127,7 +130,7 @@ class APISpotHandler(tornado.web.RequestHandler):
             # infer missing data, and add it to our database.
             spot.source = "API"
             spot.infer_missing()
-            self.spots.add(spot.id, spot, expire=MAX_SPOT_AGE)
+            self._spots.add(spot.id, spot, expire=MAX_SPOT_AGE)
 
             self.write(json.dumps("OK", default=serialize_everything))
             self.set_status(201)

server/handlers/api/alerts.py

@@ -8,24 +8,25 @@ import tornado
 import tornado_eventsource.handler
 
 from core.prometheus_metrics_handler import api_requests_counter
-from core.utils import serialize_everything
+from core.utils import serialize_everything, empty_queue
 
 SSE_HANDLER_MAX_QUEUE_SIZE = 100
 SSE_HANDLER_QUEUE_CHECK_INTERVAL = 5000
 
 
-# API request handler for /api/v1/alerts
 class APIAlertsHandler(tornado.web.RequestHandler):
+    """API request handler for /api/v1/alerts"""
+
     def initialize(self, alerts, web_server_metrics):
-        self.alerts = alerts
+        self._alerts = alerts
-        self.web_server_metrics = web_server_metrics
+        self._web_server_metrics = web_server_metrics
 
     def get(self):
         try:
             # Metrics
-            self.web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
+            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self.web_server_metrics["api_access_counter"] += 1
+            self._web_server_metrics["api_access_counter"] += 1
-            self.web_server_metrics["status"] = "OK"
+            self._web_server_metrics["status"] = "OK"
             api_requests_counter.inc()
 
             # request.arguments contains lists for each param key because technically the client can supply multiple,
@@ -33,7 +34,7 @@ class APIAlertsHandler(tornado.web.RequestHandler):
             query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}
 
             # Fetch all alerts matching the query
-            data = get_alert_list_with_filters(self.alerts, query_params)
+            data = get_alert_list_with_filters(self._alerts, query_params)
             self.write(json.dumps(data, default=serialize_everything))
             self.set_status(200)
         except ValueError as e:
@@ -47,74 +48,82 @@ class APIAlertsHandler(tornado.web.RequestHandler):
         self.set_header("Cache-Control", "no-store")
         self.set_header("Content-Type", "application/json")
 
-# API request handler for /api/v1/alerts/stream
-class APIAlertsStreamHandler(tornado_eventsource.handler.EventSourceHandler):
-    def initialize(self, sse_alert_queues, web_server_metrics):
-        self.sse_alert_queues = sse_alert_queues
-        self.web_server_metrics = web_server_metrics
 
-    # Custom headers to avoid e.g. nginx reverse proxy from buffering SSE data
+class APIAlertsStreamHandler(tornado_eventsource.handler.EventSourceHandler):
+    """API request handler for /api/v1/alerts/stream"""
+
+    def initialize(self, sse_alert_queues, web_server_metrics):
+        self._sse_alert_queues = sse_alert_queues
+        self._web_server_metrics = web_server_metrics
+
     def custom_headers(self):
+        """Custom headers to avoid e.g. nginx reverse proxy from buffering SSE data"""
+
         return {"Cache-Control": "no-store",
                 "X-Accel-Buffering": "no"}
 
     def open(self):
         try:
             # Metrics
-            self.web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
+            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self.web_server_metrics["api_access_counter"] += 1
+            self._web_server_metrics["api_access_counter"] += 1
-            self.web_server_metrics["status"] = "OK"
+            self._web_server_metrics["status"] = "OK"
             api_requests_counter.inc()
 
             # request.arguments contains lists for each param key because technically the client can supply multiple,
             # reduce that to just the first entry, and convert bytes to string
-            self.query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}
+            self._query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}
 
             # Create a alert queue and add it to the web server's list. The web server will fill this when alerts arrive
-            self.alert_queue = Queue(maxsize=SSE_HANDLER_MAX_QUEUE_SIZE)
+            self._alert_queue = Queue(maxsize=SSE_HANDLER_MAX_QUEUE_SIZE)
-            self.sse_alert_queues.append(self.alert_queue)
+            self._sse_alert_queues.append(self._alert_queue)
 
             # Set up a timed callback to check if anything is in the queue
-            self.heartbeat = tornado.ioloop.PeriodicCallback(self._callback, SSE_HANDLER_QUEUE_CHECK_INTERVAL)
+            self._heartbeat = tornado.ioloop.PeriodicCallback(self._callback, SSE_HANDLER_QUEUE_CHECK_INTERVAL)
-            self.heartbeat.start()
+            self._heartbeat.start()
 
         except Exception as e:
-            logging.warn("Exception when serving SSE socket", e)
+            logging.warning("Exception when serving SSE socket", e)
 
-    # When the user closes the socket, empty our queue and remove it from the list so the server no longer fills it
     def close(self):
+        """When the user closes the socket, empty our queue and remove it from the list so the server no longer fills it"""
+
         try:
-            if self.alert_queue in self.sse_alert_queues:
+            if self._alert_queue in self._sse_alert_queues:
-                self.sse_alert_queues.remove(self.alert_queue)
+                self._sse_alert_queues.remove(self._alert_queue)
-            self.alert_queue.empty()
+            empty_queue(self._alert_queue)
         except:
             pass
-        self.alert_queue = None
+        try:
+            self._heartbeat.stop()
+        except:
+            pass
+        self._alert_queue = None
         super().close()
 
-    # Callback to check if anything has arrived in the queue, and if so send it to the client
     def _callback(self):
+        """Callback to check if anything has arrived in the queue, and if so send it to the client"""
+
         try:
-            if self.alert_queue:
+            if self._alert_queue:
-                while not self.alert_queue.empty():
+                while not self._alert_queue.empty():
-                    alert = self.alert_queue.get()
+                    alert = self._alert_queue.get()
                     # If the new alert matches our param filters, send it to the client. If not, ignore it.
-                    if alert_allowed_by_query(alert, self.query_params):
+                    if alert_allowed_by_query(alert, self._query_params):
                         self.write_message(msg=json.dumps(alert, default=serialize_everything))
 
-                if self.alert_queue not in self.sse_alert_queues:
+                if self._alert_queue not in self._sse_alert_queues:
                     logging.error("Web server cleared up a queue of an active connection!")
                     self.close()
         except:
-            logging.warn("Exception in SSE callback, connection will be closed.")
+            logging.warning("Exception in SSE callback, connection will be closed.")
             self.close()
 
 
-
-
-# Utility method to apply filters to the overall alert list and return only a subset. Enables query parameters in
-# the main "alerts" GET call.
 def get_alert_list_with_filters(all_alerts, query):
+    """Utility method to apply filters to the overall alert list and return only a subset. Enables query parameters in
+    the main "alerts" GET call."""
+
     # Create a shallow copy of the alert list ordered by start time, then filter the list to reduce it only to alerts
     # that match the filter parameters in the query string. Finally, apply a limit to the number of alerts returned.
     # The list of query string filters is defined in the API docs.
@@ -130,9 +139,11 @@ def get_alert_list_with_filters(all_alerts, query):
         alerts = alerts[:int(query.get("limit"))]
     return alerts
 
-# Given URL query params and an alert, figure out if the alert "passes" the requested filters or is rejected. The list
+
-# of query parameters and their function is defined in the API docs.
 def alert_allowed_by_query(alert, query):
+    """Given URL query params and an alert, figure out if the alert "passes" the requested filters or is rejected. The list
+    of query parameters and their function is defined in the API docs."""
+
     for k in query.keys():
         match k:
             case "received_since":
@@ -144,8 +155,8 @@ def alert_allowed_by_query(alert, query):
                 # Check the duration if end_time is provided. If end_time is not provided, assume the activation is
                 # "short", i.e. it always passes this check. If dxpeditions_skip_max_duration_check is true and
                 # the alert is a dxpedition, it also always passes the check.
-                if alert.is_dxpedition and (bool(query.get(
+                if alert.is_dxpedition and (query.get(
-                        "dxpeditions_skip_max_duration_check")) if "dxpeditions_skip_max_duration_check" in query.keys() else False):
+                        "dxpeditions_skip_max_duration_check").upper() == "TRUE" if "dxpeditions_skip_max_duration_check" in query.keys() else False):
                     continue
                 if alert.end_time and alert.start_time and alert.end_time - alert.start_time > max_duration:
                     return False

server/handlers/api/lookups.py

@@ -7,6 +7,7 @@ import pytz
 import tornado
 
 from core.constants import SIGS
+from core.geo_utils import lat_lon_for_grid_sw_corner_plus_size, lat_lon_to_cq_zone, lat_lon_to_itu_zone
 from core.prometheus_metrics_handler import api_requests_counter
 from core.sig_utils import get_ref_regex_for_sig, populate_sig_ref_info
 from core.utils import serialize_everything
@@ -14,17 +15,18 @@ from data.sig_ref import SIGRef
 from data.spot import Spot
 
 
-# API request handler for /api/v1/lookup/call
 class APILookupCallHandler(tornado.web.RequestHandler):
+    """API request handler for /api/v1/lookup/call"""
+
     def initialize(self, web_server_metrics):
-        self.web_server_metrics = web_server_metrics
+        self._web_server_metrics = web_server_metrics
 
     def get(self):
         try:
             # Metrics
-            self.web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
+            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self.web_server_metrics["api_access_counter"] += 1
+            self._web_server_metrics["api_access_counter"] += 1
-            self.web_server_metrics["status"] = "OK"
+            self._web_server_metrics["status"] = "OK"
             api_requests_counter.inc()
 
             # request.arguments contains lists for each param key because technically the client can supply multiple,
@@ -73,17 +75,18 @@ class APILookupCallHandler(tornado.web.RequestHandler):
         self.set_header("Content-Type", "application/json")
 
 
-# API request handler for /api/v1/lookup/sigref
 class APILookupSIGRefHandler(tornado.web.RequestHandler):
+    """API request handler for /api/v1/lookup/sigref"""
+
     def initialize(self, web_server_metrics):
-        self.web_server_metrics = web_server_metrics
+        self._web_server_metrics = web_server_metrics
 
     def get(self):
         try:
             # Metrics
-            self.web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
+            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self.web_server_metrics["api_access_counter"] += 1
+            self._web_server_metrics["api_access_counter"] += 1
-            self.web_server_metrics["status"] = "OK"
+            self._web_server_metrics["status"] = "OK"
             api_requests_counter.inc()
 
             # request.arguments contains lists for each param key because technically the client can supply multiple,
@@ -94,15 +97,15 @@ class APILookupSIGRefHandler(tornado.web.RequestHandler):
             # the provided id must match it.
             if "sig" in query_params.keys() and "id" in query_params.keys():
                 sig = query_params.get("sig").upper()
-                id = query_params.get("id").upper()
+                ref_id = query_params.get("id").upper()
                 if sig in list(map(lambda p: p.name, SIGS)):
-                    if not get_ref_regex_for_sig(sig) or re.match(get_ref_regex_for_sig(sig), id):
+                    if not get_ref_regex_for_sig(sig) or re.match(get_ref_regex_for_sig(sig), ref_id):
-                        data = populate_sig_ref_info(SIGRef(id=id, sig=sig))
+                        data = populate_sig_ref_info(SIGRef(id=ref_id, sig=sig))
                         self.write(json.dumps(data, default=serialize_everything))
 
                     else:
                         self.write(
-                            json.dumps("Error - '" + id + "' does not look like a valid reference ID for " + sig + ".",
+                            json.dumps("Error - '" + ref_id + "' does not look like a valid reference ID for " + sig + ".",
                                        default=serialize_everything))
                         self.set_status(422)
                 else:
@@ -119,3 +122,61 @@ class APILookupSIGRefHandler(tornado.web.RequestHandler):
 
         self.set_header("Cache-Control", "no-store")
         self.set_header("Content-Type", "application/json")
+
+
+class APILookupGridHandler(tornado.web.RequestHandler):
+    """API request handler for /api/v1/lookup/grid"""
+
+    def initialize(self, web_server_metrics):
+        self._web_server_metrics = web_server_metrics
+
+    def get(self):
+        try:
+            # Metrics
+            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
+            self._web_server_metrics["api_access_counter"] += 1
+            self._web_server_metrics["status"] = "OK"
+            api_requests_counter.inc()
+
+            # request.arguments contains lists for each param key because technically the client can supply multiple,
+            # reduce that to just the first entry, and convert bytes to string
+            query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}
+
+            # "grid" query param must exist.
+            if "grid" in query_params.keys():
+                grid = query_params.get("grid").upper()
+                lat, lon, lat_cell_size, lon_cell_size = lat_lon_for_grid_sw_corner_plus_size(grid)
+                if lat is not None and lon is not None and lat_cell_size is not None and lon_cell_size is not None:
+                    center_lat = lat + lat_cell_size / 2.0
+                    center_lon = lon + lon_cell_size / 2.0
+                    center_cq_zone = lat_lon_to_cq_zone(center_lat, center_lon)
+                    center_itu_zone = lat_lon_to_itu_zone(center_lat, center_lon)
+
+                    response = {
+                        "center": {
+                            "latitude": center_lat,
+                            "longitude": center_lon,
+                            "cq_zone": center_cq_zone,
+                            "itu_zone": center_itu_zone
+                        },
+                        "southwest": {
+                            "latitude": lat,
+                            "longitude": lon,
+                        },
+                        "northeast": {
+                            "latitude": lat + lat_cell_size,
+                            "longitude": lon + lon_cell_size,
+                        }}
+                    self.write(json.dumps(response, default=serialize_everything))
+
+            else:
+                self.write(json.dumps("Error - grid must be provided", default=serialize_everything))
+                self.set_status(422)
+
+        except Exception as e:
+            logging.error(e)
+            self.write(json.dumps("Error - " + str(e), default=serialize_everything))
+            self.set_status(500)
+
+        self.set_header("Cache-Control", "no-store")
+        self.set_header("Content-Type", "application/json")

server/handlers/api/options.py

@@ -4,23 +4,24 @@ from datetime import datetime
 import pytz
 import tornado
 
-from core.config import MAX_SPOT_AGE, ALLOW_SPOTTING, WEB_UI_OPTIONS
+from core.config import MAX_SPOT_AGE, ALLOW_SPOTTING
 from core.constants import BANDS, ALL_MODES, MODE_TYPES, SIGS, CONTINENTS
 from core.prometheus_metrics_handler import api_requests_counter
 from core.utils import serialize_everything
 
 
-# API request handler for /api/v1/options
 class APIOptionsHandler(tornado.web.RequestHandler):
+    """API request handler for /api/v1/options"""
+
     def initialize(self, status_data, web_server_metrics):
-        self.status_data = status_data
+        self._status_data = status_data
-        self.web_server_metrics = web_server_metrics
+        self._web_server_metrics = web_server_metrics
 
     def get(self):
         # Metrics
-        self.web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
+        self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-        self.web_server_metrics["api_access_counter"] += 1
+        self._web_server_metrics["api_access_counter"] += 1
-        self.web_server_metrics["status"] = "OK"
+        self._web_server_metrics["status"] = "OK"
         api_requests_counter.inc()
 
         options = {"bands": BANDS,
@@ -29,9 +30,9 @@ class APIOptionsHandler(tornado.web.RequestHandler):
                    "sigs": SIGS,
                    # Spot/alert sources are filtered for only ones that are enabled in config, no point letting the user toggle things that aren't even available.
                    "spot_sources": list(
-                       map(lambda p: p["name"], filter(lambda p: p["enabled"], self.status_data["spot_providers"]))),
+                       map(lambda p: p["name"], filter(lambda p: p["enabled"], self._status_data["spot_providers"]))),
                    "alert_sources": list(
-                       map(lambda p: p["name"], filter(lambda p: p["enabled"], self.status_data["alert_providers"]))),
+                       map(lambda p: p["name"], filter(lambda p: p["enabled"], self._status_data["alert_providers"]))),
                    "continents": CONTINENTS,
                    "max_spot_age": MAX_SPOT_AGE,
                    "spot_allowed": ALLOW_SPOTTING}

server/handlers/api/spots.py

@@ -8,24 +8,25 @@ import tornado
 import tornado_eventsource.handler
 
 from core.prometheus_metrics_handler import api_requests_counter
-from core.utils import serialize_everything
+from core.utils import serialize_everything, empty_queue
 
 SSE_HANDLER_MAX_QUEUE_SIZE = 1000
 SSE_HANDLER_QUEUE_CHECK_INTERVAL = 5000
 
 
-# API request handler for /api/v1/spots
 class APISpotsHandler(tornado.web.RequestHandler):
+    """API request handler for /api/v1/spots"""
+
     def initialize(self, spots, web_server_metrics):
-        self.spots = spots
+        self._spots = spots
-        self.web_server_metrics = web_server_metrics
+        self._web_server_metrics = web_server_metrics
 
     def get(self):
         try:
             # Metrics
-            self.web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
+            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self.web_server_metrics["api_access_counter"] += 1
+            self._web_server_metrics["api_access_counter"] += 1
-            self.web_server_metrics["status"] = "OK"
+            self._web_server_metrics["status"] = "OK"
             api_requests_counter.inc()
 
             # request.arguments contains lists for each param key because technically the client can supply multiple,
@@ -33,7 +34,7 @@ class APISpotsHandler(tornado.web.RequestHandler):
             query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}
 
             # Fetch all spots matching the query
-            data = get_spot_list_with_filters(self.spots, query_params)
+            data = get_spot_list_with_filters(self._spots, query_params)
             self.write(json.dumps(data, default=serialize_everything))
             self.set_status(200)
         except ValueError as e:
@@ -48,74 +49,83 @@ class APISpotsHandler(tornado.web.RequestHandler):
         self.set_header("Content-Type", "application/json")
 
 
-# API request handler for /api/v1/spots/stream
 class APISpotsStreamHandler(tornado_eventsource.handler.EventSourceHandler):
-    def initialize(self, sse_spot_queues, web_server_metrics):
+    """API request handler for /api/v1/spots/stream"""
-        self.sse_spot_queues = sse_spot_queues
+
-        self.web_server_metrics = web_server_metrics
+    def initialize(self, sse_spot_queues, web_server_metrics):
+        self._sse_spot_queues = sse_spot_queues
+        self._web_server_metrics = web_server_metrics
 
-    # Custom headers to avoid e.g. nginx reverse proxy from buffering SSE data
     def custom_headers(self):
+        """Custom headers to avoid e.g. nginx reverse proxy from buffering SSE data"""
+
         return {"Cache-Control": "no-store",
                 "X-Accel-Buffering": "no"}
 
-    # Called once on the client opening a connection, set things up
     def open(self):
+        """Called once on the client opening a connection, set things up"""
+
         try:
             # Metrics
-            self.web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
+            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self.web_server_metrics["api_access_counter"] += 1
+            self._web_server_metrics["api_access_counter"] += 1
-            self.web_server_metrics["status"] = "OK"
+            self._web_server_metrics["status"] = "OK"
             api_requests_counter.inc()
 
             # request.arguments contains lists for each param key because technically the client can supply multiple,
             # reduce that to just the first entry, and convert bytes to string
-            self.query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}
+            self._query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}
 
             # Create a spot queue and add it to the web server's list. The web server will fill this when spots arrive
-            self.spot_queue = Queue(maxsize=SSE_HANDLER_MAX_QUEUE_SIZE)
+            self._spot_queue = Queue(maxsize=SSE_HANDLER_MAX_QUEUE_SIZE)
-            self.sse_spot_queues.append(self.spot_queue)
+            self._sse_spot_queues.append(self._spot_queue)
 
             # Set up a timed callback to check if anything is in the queue
-            self.heartbeat = tornado.ioloop.PeriodicCallback(self._callback, SSE_HANDLER_QUEUE_CHECK_INTERVAL)
+            self._heartbeat = tornado.ioloop.PeriodicCallback(self._callback, SSE_HANDLER_QUEUE_CHECK_INTERVAL)
-            self.heartbeat.start()
+            self._heartbeat.start()
 
         except Exception as e:
-            logging.warn("Exception when serving SSE socket", e)
+            logging.warning("Exception when serving SSE socket", e)
 
-    # When the user closes the socket, empty our queue and remove it from the list so the server no longer fills it
     def close(self):
+        """When the user closes the socket, empty our queue and remove it from the list so the server no longer fills it"""
+
         try:
-            if self.spot_queue in self.sse_spot_queues:
+            if self._spot_queue in self._sse_spot_queues:
-                self.sse_spot_queues.remove(self.spot_queue)
+                self._sse_spot_queues.remove(self._spot_queue)
-            self.spot_queue.empty()
+            empty_queue(self._spot_queue)
         except:
             pass
-        self.spot_queue = None
+        try:
+            self._heartbeat.stop()
+        except:
+            pass
+        self._spot_queue = None
         super().close()
 
-    # Callback to check if anything has arrived in the queue, and if so send it to the client
     def _callback(self):
+        """Callback to check if anything has arrived in the queue, and if so send it to the client"""
+
         try:
-            if self.spot_queue:
+            if self._spot_queue:
-                while not self.spot_queue.empty():
+                while not self._spot_queue.empty():
-                    spot = self.spot_queue.get()
+                    spot = self._spot_queue.get()
                     # If the new spot matches our param filters, send it to the client. If not, ignore it.
-                    if spot_allowed_by_query(spot, self.query_params):
+                    if spot_allowed_by_query(spot, self._query_params):
                         self.write_message(msg=json.dumps(spot, default=serialize_everything))
 
-                if self.spot_queue not in self.sse_spot_queues:
+                if self._spot_queue not in self._sse_spot_queues:
                     logging.error("Web server cleared up a queue of an active connection!")
                     self.close()
         except:
-            logging.warn("Exception in SSE callback, connection will be closed.")
+            logging.warning("Exception in SSE callback, connection will be closed.")
             self.close()
 
 
-
-# Utility method to apply filters to the overall spot list and return only a subset. Enables query parameters in
-# the main "spots" GET call.
 def get_spot_list_with_filters(all_spots, query):
+    """Utility method to apply filters to the overall spot list and return only a subset. Enables query parameters in
+    the main "spots" GET call."""
+
     # Create a shallow copy of the spot list, ordered by spot time, then filter the list to reduce it only to spots
     # that match the filter parameters in the query string. Finally, apply a limit to the number of spots returned.
     # The list of query string filters is defined in the API docs.
@@ -151,9 +161,11 @@ def get_spot_list_with_filters(all_spots, query):
 
     return spots
 
-# Given URL query params and a spot, figure out if the spot "passes" the requested filters or is rejected. The list
+
-# of query parameters and their function is defined in the API docs.
 def spot_allowed_by_query(spot, query):
+    """Given URL query params and a spot, figure out if the spot "passes" the requested filters or is rejected. The list
+    of query parameters and their function is defined in the API docs."""
+
     for k in query.keys():
         match k:
             case "since":
@@ -229,7 +241,7 @@ def spot_allowed_by_query(spot, query):
             case "allow_qrt":
                 # If false, spots that are flagged as QRT are not returned.
                 prevent_qrt = query.get(k).upper() == "FALSE"
-                if prevent_qrt and spot.qrt and spot.qrt == True:
+                if prevent_qrt and spot.qrt:
                     return False
             case "needs_good_location":
                 # If true, spots require a "good" location to be returned

server/handlers/api/status.py

@@ -8,20 +8,21 @@ from core.prometheus_metrics_handler import api_requests_counter
 from core.utils import serialize_everything
 
 
-# API request handler for /api/v1/status
 class APIStatusHandler(tornado.web.RequestHandler):
+    """API request handler for /api/v1/status"""
+
     def initialize(self, status_data, web_server_metrics):
-        self.status_data = status_data
+        self._status_data = status_data
-        self.web_server_metrics = web_server_metrics
+        self._web_server_metrics = web_server_metrics
 
     def get(self):
         # Metrics
-        self.web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
+        self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-        self.web_server_metrics["api_access_counter"] += 1
+        self._web_server_metrics["api_access_counter"] += 1
-        self.web_server_metrics["status"] = "OK"
+        self._web_server_metrics["status"] = "OK"
         api_requests_counter.inc()
 
-        self.write(json.dumps(self.status_data, default=serialize_everything))
+        self.write(json.dumps(self._status_data, default=serialize_everything))
         self.set_status(200)
         self.set_header("Cache-Control", "no-store")
         self.set_header("Content-Type", "application/json")

server/handlers/metrics.py

@@ -4,8 +4,9 @@ from prometheus_client import CONTENT_TYPE_LATEST
 from core.prometheus_metrics_handler import get_metrics
 
 
-# Handler for Prometheus metrics endpoint
 class PrometheusMetricsHandler(tornado.web.RequestHandler):
+    """Handler for Prometheus metrics endpoint"""
+
     def get(self):
         self.write(get_metrics())
         self.set_status(200)

server/handlers/pagetemplate.py

@@ -3,25 +3,25 @@ from datetime import datetime
 import pytz
 import tornado
 
-from core.config import ALLOW_SPOTTING, WEB_UI_OPTIONS
+from core.config import ALLOW_SPOTTING, WEB_UI_OPTIONS, BASE_URL
 from core.constants import SOFTWARE_VERSION
 from core.prometheus_metrics_handler import page_requests_counter
 
 
-# Handler for all HTML pages generated from templates
 class PageTemplateHandler(tornado.web.RequestHandler):
+    """Handler for all HTML pages generated from templates"""
+
     def initialize(self, template_name, web_server_metrics):
-        self.template_name = template_name
+        self._template_name = template_name
-        self.web_server_metrics = web_server_metrics
+        self._web_server_metrics = web_server_metrics
 
     def get(self):
         # Metrics
-        self.web_server_metrics["last_page_access_time"] = datetime.now(pytz.UTC)
+        self._web_server_metrics["last_page_access_time"] = datetime.now(pytz.UTC)
-        self.web_server_metrics["page_access_counter"] += 1
+        self._web_server_metrics["page_access_counter"] += 1
-        self.web_server_metrics["status"] = "OK"
+        self._web_server_metrics["status"] = "OK"
         page_requests_counter.inc()
 
         # Load named template, and provide variables used in templates
-        self.render(self.template_name + ".html", software_version=SOFTWARE_VERSION, allow_spotting=ALLOW_SPOTTING,
+        self.render(self._template_name + ".html", software_version=SOFTWARE_VERSION, allow_spotting=ALLOW_SPOTTING,
-                    web_ui_options=WEB_UI_OPTIONS)
+                    web_ui_options=WEB_UI_OPTIONS, baseurl = BASE_URL, current_path=self.request.path)
-

server/webserver.py

@@ -5,9 +5,10 @@ import os
 import tornado
 from tornado.web import StaticFileHandler
 
+from core.utils import empty_queue
 from server.handlers.api.addspot import APISpotHandler
 from server.handlers.api.alerts import APIAlertsHandler, APIAlertsStreamHandler
-from server.handlers.api.lookups import APILookupCallHandler, APILookupSIGRefHandler
+from server.handlers.api.lookups import APILookupCallHandler, APILookupSIGRefHandler, APILookupGridHandler
 from server.handlers.api.options import APIOptionsHandler
 from server.handlers.api.spots import APISpotsHandler, APISpotsStreamHandler
 from server.handlers.api.status import APIStatusHandler
@@ -15,17 +16,19 @@ from server.handlers.metrics import PrometheusMetricsHandler
 from server.handlers.pagetemplate import PageTemplateHandler
 
 
-# Provides the public-facing web server.
 class WebServer:
-    # Constructor
+    """Provides the public-facing web server."""
+
     def __init__(self, spots, alerts, status_data, port):
-        self.spots = spots
+        """Constructor"""
-        self.alerts = alerts
+
-        self.sse_spot_queues = []
+        self._spots = spots
-        self.sse_alert_queues = []
+        self._alerts = alerts
-        self.status_data = status_data
+        self._sse_spot_queues = []
-        self.port = port
+        self._sse_alert_queues = []
-        self.shutdown_event = asyncio.Event()
+        self._status_data = status_data
+        self._port = port
+        self._shutdown_event = asyncio.Event()
         self.web_server_metrics = {
             "last_page_access_time": None,
             "last_api_access_time": None,
@@ -34,36 +37,49 @@ class WebServer:
             "status": "Starting"
         }
 
-    # Start the web server
     def start(self):
-        asyncio.run(self.start_inner())
+        """Start the web server"""
+
+        asyncio.run(self._start_inner())
 
-    # Stop the web server
     def stop(self):
-        self.shutdown_event.set()
+        """Stop the web server"""
+
+        self._shutdown_event.set()
+
+    async def _start_inner(self):
+        """Start method (async). Sets up the Tornado application."""
 
-    # Start method (async). Sets up the Tornado application.
-    async def start_inner(self):
         app = tornado.web.Application([
             # Routes for API calls
-            (r"/api/v1/spots", APISpotsHandler, {"spots": self.spots, "web_server_metrics": self.web_server_metrics}),
+            (r"/api/v1/spots", APISpotsHandler, {"spots": self._spots, "web_server_metrics": self.web_server_metrics}),
-            (r"/api/v1/alerts", APIAlertsHandler, {"alerts": self.alerts, "web_server_metrics": self.web_server_metrics}),
+            (r"/api/v1/alerts", APIAlertsHandler,
-            (r"/api/v1/spots/stream", APISpotsStreamHandler, {"sse_spot_queues": self.sse_spot_queues, "web_server_metrics": self.web_server_metrics}),
+             {"alerts": self._alerts, "web_server_metrics": self.web_server_metrics}),
-            (r"/api/v1/alerts/stream", APIAlertsStreamHandler, {"sse_alert_queues": self.sse_alert_queues, "web_server_metrics": self.web_server_metrics}),
+            (r"/api/v1/spots/stream", APISpotsStreamHandler,
-            (r"/api/v1/options", APIOptionsHandler, {"status_data": self.status_data, "web_server_metrics": self.web_server_metrics}),
+             {"sse_spot_queues": self._sse_spot_queues, "web_server_metrics": self.web_server_metrics}),
-            (r"/api/v1/status", APIStatusHandler, {"status_data": self.status_data, "web_server_metrics": self.web_server_metrics}),
+            (r"/api/v1/alerts/stream", APIAlertsStreamHandler,
+             {"sse_alert_queues": self._sse_alert_queues, "web_server_metrics": self.web_server_metrics}),
+            (r"/api/v1/options", APIOptionsHandler,
+             {"status_data": self._status_data, "web_server_metrics": self.web_server_metrics}),
+            (r"/api/v1/status", APIStatusHandler,
+             {"status_data": self._status_data, "web_server_metrics": self.web_server_metrics}),
             (r"/api/v1/lookup/call", APILookupCallHandler, {"web_server_metrics": self.web_server_metrics}),
             (r"/api/v1/lookup/sigref", APILookupSIGRefHandler, {"web_server_metrics": self.web_server_metrics}),
-            (r"/api/v1/spot", APISpotHandler, {"spots": self.spots, "web_server_metrics": self.web_server_metrics}),
+            (r"/api/v1/lookup/grid", APILookupGridHandler, {"web_server_metrics": self.web_server_metrics}),
+            (r"/api/v1/spot", APISpotHandler, {"spots": self._spots, "web_server_metrics": self.web_server_metrics}),
             # Routes for templated pages
             (r"/", PageTemplateHandler, {"template_name": "spots", "web_server_metrics": self.web_server_metrics}),
             (r"/map", PageTemplateHandler, {"template_name": "map", "web_server_metrics": self.web_server_metrics}),
             (r"/bands", PageTemplateHandler, {"template_name": "bands", "web_server_metrics": self.web_server_metrics}),
-            (r"/alerts", PageTemplateHandler, {"template_name": "alerts", "web_server_metrics": self.web_server_metrics}),
+            (r"/alerts", PageTemplateHandler,
-            (r"/add-spot", PageTemplateHandler, {"template_name": "add_spot", "web_server_metrics": self.web_server_metrics}),
+             {"template_name": "alerts", "web_server_metrics": self.web_server_metrics}),
-            (r"/status", PageTemplateHandler, {"template_name": "status", "web_server_metrics": self.web_server_metrics}),
+            (r"/add-spot", PageTemplateHandler,
+             {"template_name": "add_spot", "web_server_metrics": self.web_server_metrics}),
+            (r"/status", PageTemplateHandler,
+             {"template_name": "status", "web_server_metrics": self.web_server_metrics}),
             (r"/about", PageTemplateHandler, {"template_name": "about", "web_server_metrics": self.web_server_metrics}),
-            (r"/apidocs", PageTemplateHandler, {"template_name": "apidocs", "web_server_metrics": self.web_server_metrics}),
+            (r"/apidocs", PageTemplateHandler,
+             {"template_name": "apidocs", "web_server_metrics": self.web_server_metrics}),
             # Route for Prometheus metrics
             (r"/metrics", PrometheusMetricsHandler),
             # Default route to serve from "webassets"
@@ -71,13 +87,14 @@ class WebServer:
         ],
             template_path=os.path.join(os.path.dirname(__file__), "../templates"),
             debug=False)
-        app.listen(self.port)
+        app.listen(self._port)
-        await self.shutdown_event.wait()
+        await self._shutdown_event.wait()
 
-    # Internal method called when a new spot is added to the system. This is used to ping any SSE clients that are
-    # awaiting a server-sent message with new spots.
     def notify_new_spot(self, spot):
-        for queue in self.sse_spot_queues:
+        """Internal method called when a new spot is added to the system. This is used to ping any SSE clients that are
+        awaiting a server-sent message with new spots."""
+
+        for queue in self._sse_spot_queues:
             try:
                 queue.put(spot)
             except:
@@ -85,10 +102,11 @@ class WebServer:
                 pass
         pass
 
-    # Internal method called when a new alert is added to the system. This is used to ping any SSE clients that are
-    # awaiting a server-sent message with new spots.
     def notify_new_alert(self, alert):
-        for queue in self.sse_alert_queues:
+        """Internal method called when a new alert is added to the system. This is used to ping any SSE clients that are
+        awaiting a server-sent message with new spots."""
+
+        for queue in self._sse_alert_queues:
             try:
                 queue.put(alert)
             except:
@@ -96,24 +114,27 @@ class WebServer:
                 pass
         pass
 
-    # Clean up any SSE queues that are growing too large; probably their client disconnected and we didn't catch it
-    # properly for some reason.
     def clean_up_sse_queues(self):
-        for q in self.sse_spot_queues:
+        """Clean up any SSE queues that are growing too large; probably their client disconnected and we didn't catch it
+        properly for some reason."""
+
+        for q in self._sse_spot_queues:
             try:
                 if q.full():
-                    logging.warn("A full SSE spot queue was found, presumably because the client disconnected strangely. It has been removed.")
+                    logging.warning(
-                    self.sse_spot_queues.remove(q)
+                        "A full SSE spot queue was found, presumably because the client disconnected strangely. It has been removed.")
-                    q.empty()
+                    self._sse_spot_queues.remove(q)
+                    empty_queue(q)
             except:
                 # Probably got deleted already on another thread
                 pass
-        for q in self.sse_alert_queues:
+        for q in self._sse_alert_queues:
             try:
                 if q.full():
-                    logging.warn("A full SSE alert queue was found, presumably because the client disconnected strangely. It has been removed.")
+                    logging.warning(
-                    self.sse_alert_queues.remove(q)
+                        "A full SSE alert queue was found, presumably because the client disconnected strangely. It has been removed.")
-                    q.empty()
+                    self._sse_alert_queues.remove(q)
+                    empty_queue(q)
             except:
                 # Probably got deleted already on another thread
                 pass

spothole.py

@@ -25,18 +25,19 @@ cleanup_timer = None
 run = True
 
 
-# Shutdown function
 def shutdown(sig, frame):
+    """Shutdown function"""
+
     global run
 
     logging.info("Stopping program...")
     web_server.stop()
-    for p in spot_providers:
+    for sp in spot_providers:
-        if p.enabled:
+        if sp.enabled:
-            p.stop()
+            sp.stop()
-    for p in alert_providers:
+    for ap in alert_providers:
-        if p.enabled:
+        if ap.enabled:
-            p.stop()
+            ap.stop()
     cleanup_timer.stop()
     lookup_helper.stop()
     spots.close()
@@ -44,15 +45,17 @@ def shutdown(sig, frame):
     os._exit(0)
 
 
-# Utility method to get a spot provider based on the class specified in its config entry.
 def get_spot_provider_from_config(config_providers_entry):
+    """Utility method to get a spot provider based on the class specified in its config entry."""
+
     module = importlib.import_module('spotproviders.' + config_providers_entry["class"].lower())
     provider_class = getattr(module, config_providers_entry["class"])
     return provider_class(config_providers_entry)
 
 
-# Utility method to get an alert provider based on the class specified in its config entry.
 def get_alert_provider_from_config(config_providers_entry):
+    """Utility method to get an alert provider based on the class specified in its config entry."""
+
     module = importlib.import_module('alertproviders.' + config_providers_entry["class"].lower())
     provider_class = getattr(module, config_providers_entry["class"])
     return provider_class(config_providers_entry)

spotproviders/aprsis.py

@@ -10,32 +10,32 @@ from data.spot import Spot
 from spotproviders.spot_provider import SpotProvider
 
 
-# Spot provider for the APRS-IS.
 class APRSIS(SpotProvider):
+    """Spot provider for the APRS-IS."""
 
     def __init__(self, provider_config):
         super().__init__(provider_config)
-        self.thread = Thread(target=self.connect)
+        self._thread = Thread(target=self._connect)
-        self.thread.daemon = True
+        self._thread.daemon = True
-        self.aprsis = None
+        self._aprsis = None
 
     def start(self):
-        self.thread.start()
+        self._thread.start()
 
-    def connect(self):
+    def _connect(self):
-        self.aprsis = aprslib.IS(SERVER_OWNER_CALLSIGN)
+        self._aprsis = aprslib.IS(SERVER_OWNER_CALLSIGN)
         self.status = "Connecting"
         logging.info("APRS-IS connecting...")
-        self.aprsis.connect()
+        self._aprsis.connect()
-        self.aprsis.consumer(self.handle)
+        self._aprsis.consumer(self._handle)
         logging.info("APRS-IS connected.")
 
     def stop(self):
         self.status = "Shutting down"
-        self.aprsis.close()
+        self._aprsis.close()
-        self.thread.join()
+        self._thread.join()
 
-    def handle(self, data):
+    def _handle(self, data):
         # Split SSID in "from" call and store separately
         from_parts = data["from"].split("-").upper()
         dx_call = from_parts[0]
@@ -51,10 +51,11 @@ class APRSIS(SpotProvider):
                     comment=data["comment"] if "comment" in data else None,
                     dx_latitude=data["latitude"] if "latitude" in data else None,
                     dx_longitude=data["longitude"] if "longitude" in data else None,
-                    time=datetime.now(pytz.UTC).timestamp()) # APRS-IS spots are live so we can assume spot time is "now"
+                    time=datetime.now(
+                        pytz.UTC).timestamp())  # APRS-IS spots are live so we can assume spot time is "now"
 
         # Add to our list
-        self.submit(spot)
+        self._submit(spot)
 
         self.status = "OK"
         self.last_update_time = datetime.now(pytz.UTC)

spotproviders/dxcluster.py

@@ -12,66 +12,67 @@ from data.spot import Spot
 from spotproviders.spot_provider import SpotProvider
 
 
-# Spot provider for a DX Cluster. Hostname, port, login_prompt, login_callsign and allow_rbn_spots are provided in config.
-# See config-example.yml for examples.
 class DXCluster(SpotProvider):
-    CALLSIGN_PATTERN = "([a-z|0-9|/]+)"
+    """Spot provider for a DX Cluster. Hostname, port, login_prompt, login_callsign and allow_rbn_spots are provided in config.
-    FREQUENCY_PATTERN = "([0-9|.]+)"
+    See config-example.yml for examples."""
-    LINE_PATTERN_EXCLUDE_RBN = re.compile(
+
-        "^DX de " + CALLSIGN_PATTERN + ":\\s+" + FREQUENCY_PATTERN + "\\s+" + CALLSIGN_PATTERN + "\\s+(.*)\\s+(\\d{4}Z)",
+    _LINE_PATTERN_EXCLUDE_RBN = re.compile(
+        r"^DX de ([a-z0-9/]+):\s+([0-9.]+)\s+([a-z0-9/]+)\s+(.*)\s+(\d{4}Z)",
         re.IGNORECASE)
-    LINE_PATTERN_ALLOW_RBN = re.compile(
+    _LINE_PATTERN_ALLOW_RBN = re.compile(
-        "^DX de " + CALLSIGN_PATTERN + "-?#?:\\s+" + FREQUENCY_PATTERN + "\\s+" + CALLSIGN_PATTERN + "\\s+(.*)\\s+(\\d{4}Z)",
+        r"^DX de ([a-z0-9/]+)-?#?:\s+([0-9.]+)\s+([a-z0-9/]+)\s+(.*)\s+(\d{4}Z)",
         re.IGNORECASE)
 
-    # Constructor requires hostname and port
     def __init__(self, provider_config):
+        """Constructor requires hostname and port"""
+
         super().__init__(provider_config)
-        self.hostname = provider_config["host"]
+        self._hostname = provider_config["host"]
-        self.port = provider_config["port"]
+        self._port = provider_config["port"]
-        self.login_prompt = provider_config["login_prompt"] if "login_prompt" in provider_config else "login:"
+        self._login_prompt = provider_config["login_prompt"] if "login_prompt" in provider_config else "login:"
-        self.login_callsign = provider_config["login_callsign"] if "login_callsign" in provider_config else SERVER_OWNER_CALLSIGN
+        self._login_callsign = provider_config[
-        self.allow_rbn_spots = provider_config["allow_rbn_spots"] if "allow_rbn_spots" in provider_config else False
+            "login_callsign"] if "login_callsign" in provider_config else SERVER_OWNER_CALLSIGN
-        self.spot_line_pattern = self.LINE_PATTERN_ALLOW_RBN if self.allow_rbn_spots else self.LINE_PATTERN_EXCLUDE_RBN
+        self._allow_rbn_spots = provider_config["allow_rbn_spots"] if "allow_rbn_spots" in provider_config else False
-        self.telnet = None
+        self._spot_line_pattern = self._LINE_PATTERN_ALLOW_RBN if self._allow_rbn_spots else self._LINE_PATTERN_EXCLUDE_RBN
-        self.thread = Thread(target=self.handle)
+        self._telnet = None
-        self.thread.daemon = True
+        self._thread = Thread(target=self._handle)
-        self.run = True
+        self._thread.daemon = True
+        self._running = True
 
     def start(self):
-        self.thread.start()
+        self._thread.start()
 
     def stop(self):
-        self.run = False
+        self._running = False
-        self.telnet.close()
+        self._telnet.close()
-        self.thread.join()
+        self._thread.join()
 
-    def handle(self):
+    def _handle(self):
-        while self.run:
+        while self._running:
             connected = False
-            while not connected and self.run:
+            while not connected and self._running:
                 try:
                     self.status = "Connecting"
-                    logging.info("DX Cluster " + self.hostname + " connecting...")
+                    logging.info("DX Cluster " + self._hostname + " connecting...")
-                    self.telnet = telnetlib3.Telnet(self.hostname, self.port)
+                    self._telnet = telnetlib3.Telnet(self._hostname, self._port)
-                    self.telnet.read_until(self.login_prompt.encode("latin-1"))
+                    self._telnet.read_until(self._login_prompt.encode("latin-1"))
-                    self.telnet.write((self.login_callsign + "\n").encode("latin-1"))
+                    self._telnet.write((self._login_callsign + "\n").encode("latin-1"))
                     connected = True
-                    logging.info("DX Cluster " + self.hostname + " connected.")
+                    logging.info("DX Cluster " + self._hostname + " connected.")
-                except Exception as e:
+                except Exception:
                     self.status = "Error"
-                    logging.exception("Exception while connecting to DX Cluster Provider (" + self.hostname + ").")
+                    logging.exception("Exception while connecting to DX Cluster Provider (" + self._hostname + ").")
                     sleep(5)
 
             self.status = "Waiting for Data"
-            while connected and self.run:
+            while connected and self._running:
                 try:
                     # Check new telnet info against regular expression
-                    telnet_output = self.telnet.read_until("\n".encode("latin-1"))
+                    telnet_output = self._telnet.read_until("\n".encode("latin-1"))
-                    match = self.spot_line_pattern.match(telnet_output.decode("latin-1"))
+                    match = self._spot_line_pattern.match(telnet_output.decode("latin-1"))
                     if match:
                         spot_time = datetime.strptime(match.group(5), "%H%MZ")
-                        spot_datetime = datetime.combine(datetime.today(), spot_time.time()).replace(tzinfo=pytz.UTC)
+                        spot_datetime = datetime.combine(datetime.now(pytz.UTC).date(), spot_time.time(), tzinfo=pytz.UTC)
                         spot = Spot(source=self.name,
                                     dx_call=match.group(3),
                                     de_call=match.group(1),
@@ -80,20 +81,20 @@ class DXCluster(SpotProvider):
                                     time=spot_datetime.timestamp())
 
                         # Add to our list
-                        self.submit(spot)
+                        self._submit(spot)
 
                         self.status = "OK"
                         self.last_update_time = datetime.now(pytz.UTC)
-                        logging.debug("Data received from DX Cluster " + self.hostname + ".")
+                        logging.debug("Data received from DX Cluster " + self._hostname + ".")
 
-                except Exception as e:
+                except Exception:
                     connected = False
-                    if self.run:
+                    if self._running:
                         self.status = "Error"
-                        logging.exception("Exception in DX Cluster Provider (" + self.hostname + ")")
+                        logging.exception("Exception in DX Cluster Provider (" + self._hostname + ")")
                         sleep(5)
                     else:
-                        logging.info("DX Cluster " + self.hostname + " shutting down...")
+                        logging.info("DX Cluster " + self._hostname + " shutting down...")
                         self.status = "Shutting down"
 
             self.status = "Disconnected"

spotproviders/gma.py

@@ -10,8 +10,9 @@ from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-# Spot provider for General Mountain Activity
 class GMA(HTTPSpotProvider):
+    """Spot provider for General Mountain Activity"""
+
     POLL_INTERVAL_SEC = 120
     SPOTS_URL = "https://www.cqgma.org/api/spots/25/"
     # GMA spots don't contain the details of the programme they are for, we need a separate lookup for that
@@ -20,7 +21,7 @@ class GMA(HTTPSpotProvider):
     def __init__(self, provider_config):
         super().__init__(provider_config, self.SPOTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_spots(self, http_response):
+    def _http_response_to_spots(self, http_response):
         new_spots = []
         # Iterate through source data
         for source_spot in http_response.json()["RCD"]:
@@ -36,9 +37,11 @@ class GMA(HTTPSpotProvider):
                         sig_refs=[SIGRef(id=source_spot["REF"], sig="", name=source_spot["NAME"])],
                         time=datetime.strptime(source_spot["DATE"] + source_spot["TIME"], "%Y%m%d%H%M").replace(
                             tzinfo=pytz.UTC).timestamp(),
-                        dx_latitude=float(source_spot["LAT"]) if (source_spot["LAT"] and source_spot["LAT"] != "") else None,
+                        dx_latitude=float(source_spot["LAT"]) if (
+                                    source_spot["LAT"] and source_spot["LAT"] != "") else None,
                         # Seen GMA spots with no (or empty) lat/lon
-                        dx_longitude=float(source_spot["LON"]) if (source_spot["LON"] and source_spot["LON"] != "") else None)
+                        dx_longitude=float(source_spot["LON"]) if (
+                                    source_spot["LON"] and source_spot["LON"] != "") else None)
 
             # GMA doesn't give what programme (SIG) the reference is for until we separately look it up.
             if "REF" in source_spot:
@@ -74,7 +77,7 @@ class GMA(HTTPSpotProvider):
                                     spot.sig_refs[0].sig = "MOTA"
                                     spot.sig = "MOTA"
                                 case _:
-                                    logging.warn("GMA spot found with ref type " + ref_info[
+                                    logging.warning("GMA spot found with ref type " + ref_info[
                                         "reftype"] + ", developer needs to add support for this!")
                                     spot.sig_refs[0].sig = ref_info["reftype"]
                                     spot.sig = ref_info["reftype"]
@@ -83,5 +86,6 @@ class GMA(HTTPSpotProvider):
                             # that for us.
                             new_spots.append(spot)
                 except:
-                    logging.warn("Exception when looking up " + self.REF_INFO_URL_ROOT + source_spot["REF"] + ", ignoring this spot for now")
+                    logging.warning("Exception when looking up " + self.REF_INFO_URL_ROOT + source_spot[
+                        "REF"] + ", ignoring this spot for now")
         return new_spots

spotproviders/hema.py

@@ -10,8 +10,9 @@ from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-# Spot provider for HuMPs Excluding Marilyns Award
 class HEMA(HTTPSpotProvider):
+    """Spot provider for HuMPs Excluding Marilyns Award"""
+
     POLL_INTERVAL_SEC = 300
     # HEMA wants us to check for a "spot seed" from the API and see if it's actually changed before querying the main
     # data API. So it's actually the SPOT_SEED_URL that we pass into the constructor and get the superclass to call on a
@@ -23,13 +24,13 @@ class HEMA(HTTPSpotProvider):
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.SPOT_SEED_URL, self.POLL_INTERVAL_SEC)
-        self.spot_seed = ""
+        self._spot_seed = ""
 
-    def http_response_to_spots(self, http_response):
+    def _http_response_to_spots(self, http_response):
         # OK, source data is actually just the spot seed at this point. We'll then go on to fetch real data if we know
         # this has changed.
-        spot_seed_changed = http_response.text != self.spot_seed
+        spot_seed_changed = http_response.text != self._spot_seed
-        self.spot_seed = http_response.text
+        self._spot_seed = http_response.text
 
         new_spots = []
         # OK, if the spot seed actually changed, now we make the real request for data.
@@ -54,7 +55,8 @@ class HEMA(HTTPSpotProvider):
                                 comment=spotter_comment_match.group(2),
                                 sig="HEMA",
                                 sig_refs=[SIGRef(id=spot_items[3].upper(), sig="HEMA", name=spot_items[4])],
-                                time=datetime.strptime(spot_items[0], "%d/%m/%Y %H:%M").replace(tzinfo=pytz.UTC).timestamp(),
+                                time=datetime.strptime(spot_items[0], "%d/%m/%Y %H:%M").replace(
+                                    tzinfo=pytz.UTC).timestamp(),
                                 dx_latitude=float(spot_items[7]),
                                 dx_longitude=float(spot_items[8]))
 

spotproviders/http_spot_provider.py

@@ -1,7 +1,6 @@
 import logging
 from datetime import datetime
-from threading import Timer, Thread
+from threading import Thread, Event
-from time import sleep
 
 import pytz
 import requests
@@ -10,54 +9,56 @@ from core.constants import HTTP_HEADERS
 from spotproviders.spot_provider import SpotProvider
 
 
-# Generic spot provider class for providers that request data via HTTP(S). Just for convenience to avoid code
-# duplication. Subclasses of this query the individual APIs for data.
 class HTTPSpotProvider(SpotProvider):
+    """Generic spot provider class for providers that request data via HTTP(S). Just for convenience to avoid code
+    duplication. Subclasses of this query the individual APIs for data."""
 
     def __init__(self, provider_config, url, poll_interval):
         super().__init__(provider_config)
-        self.url = url
+        self._url = url
-        self.poll_interval = poll_interval
+        self._poll_interval = poll_interval
-        self.poll_timer = None
+        self._thread = None
+        self._stop_event = Event()
 
     def start(self):
-        # Fire off a one-shot thread to run poll() for the first time, just to ensure start() returns immediately and
+        # Fire off the polling thread. It will poll immediately on startup, then sleep for poll_interval between
-        # the application can continue starting. The thread itself will then die, and the timer will kick in on its own
+        # subsequent polls, so start() returns immediately and the application can continue starting.
-        # thread.
+        logging.info("Set up query of " + self.name + " spot API every " + str(self._poll_interval) + " seconds.")
-        logging.info("Set up query of " + self.name + " spot API every " + str(self.poll_interval) + " seconds.")
+        self._thread = Thread(target=self._run, daemon=True)
-        thread = Thread(target=self.poll)
+        self._thread.start()
-        thread.daemon = True
-        thread.start()
 
     def stop(self):
-        if self.poll_timer:
+        self._stop_event.set()
-            self.poll_timer.cancel()
 
-    def poll(self):
+    def _run(self):
+        while True:
+            self._poll()
+            if self._stop_event.wait(timeout=self._poll_interval):
+                break
+
+    def _poll(self):
         try:
             # Request data from API
             logging.debug("Polling " + self.name + " spot API...")
-            http_response = requests.get(self.url, headers=HTTP_HEADERS)
+            http_response = requests.get(self._url, headers=HTTP_HEADERS)
             # Pass off to the subclass for processing
-            new_spots = self.http_response_to_spots(http_response)
+            new_spots = self._http_response_to_spots(http_response)
             # Submit the new spots for processing. There might not be any spots for the less popular programs.
             if new_spots:
-                self.submit_batch(new_spots)
+                self._submit_batch(new_spots)
 
             self.status = "OK"
             self.last_update_time = datetime.now(pytz.UTC)
             logging.debug("Received data from " + self.name + " spot API.")
 
-        except Exception as e:
+        except Exception:
             self.status = "Error"
             logging.exception("Exception in HTTP JSON Spot Provider (" + self.name + ")")
-            sleep(1)
+            self._stop_event.wait(timeout=1)
 
-        self.poll_timer = Timer(self.poll_interval, self.poll)
+    def _http_response_to_spots(self, http_response):
-        self.poll_timer.start()
+        """Convert an HTTP response returned by the API into spot data. The whole response is provided here so the subclass
+        implementations can check for HTTP status codes if necessary, and handle the response as JSON, XML, text, whatever
+        the API actually provides."""
 
-    # Convert an HTTP response returned by the API into spot data. The whole response is provided here so the subclass
-    # implementations can check for HTTP status codes if necessary, and handle the response as JSON, XML, text, whatever
-    # the API actually provides.
-    def http_response_to_spots(self, http_response):
         raise NotImplementedError("Subclasses must implement this method")

spotproviders/llota.py

@@ -5,15 +5,16 @@ from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-# Spot provider for Lagos y Lagunas On the Air
 class LLOTA(HTTPSpotProvider):
+    """Spot provider for Lagos y Lagunas On the Air"""
+
     POLL_INTERVAL_SEC = 120
     SPOTS_URL = "https://llota.app/api/public/spots"
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.SPOTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_spots(self, http_response):
+    def _http_response_to_spots(self, http_response):
         new_spots = []
         # Iterate through source data
         for source_spot in http_response.json():

spotproviders/parksnpeaks.py

@@ -9,8 +9,9 @@ from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-# Spot provider for Parks n Peaks
 class ParksNPeaks(HTTPSpotProvider):
+    """Spot provider for Parks n Peaks"""
+
     POLL_INTERVAL_SEC = 120
     SPOTS_URL = "https://www.parksnpeaks.org/api/ALL"
     SIOTA_LIST_URL = "https://www.silosontheair.com/data/silos.csv"
@@ -18,7 +19,7 @@ class ParksNPeaks(HTTPSpotProvider):
     def __init__(self, provider_config):
         super().__init__(provider_config, self.SPOTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_spots(self, http_response):
+    def _http_response_to_spots(self, http_response):
         new_spots = []
         # Iterate through source data
         for source_spot in http_response.json():
@@ -26,32 +27,37 @@ class ParksNPeaks(HTTPSpotProvider):
             spot = Spot(source=self.name,
                         source_id=source_spot["actID"],
                         dx_call=source_spot["actCallsign"].upper(),
-                        de_call=source_spot["actSpoter"].upper() if source_spot["actSpoter"] != "" else None,  # typo exists in API
+                        de_call=source_spot["actSpoter"].upper() if source_spot["actSpoter"] != "" else None,
+                        # typo exists in API
                         freq=float(source_spot["actFreq"].replace(",", "")) * 1000000 if (
                                 source_spot["actFreq"] != "") else None,
                         # Seen PNP spots with empty frequency, and with comma-separated thousands digits
                         mode=source_spot["actMode"].upper(),
                         comment=source_spot["actComments"],
-                        sig=source_spot["actClass"].upper(),
-                        sig_refs=[SIGRef(id=source_spot["actSiteID"], sig=source_spot["actClass"].upper())],
                         time=datetime.strptime(source_spot["actTime"], "%Y-%m-%d %H:%M:%S").replace(
                             tzinfo=pytz.UTC).timestamp())
 
-            # Free text location is not present in all spots, so only add it if it's set
-            if "actLocation" in source_spot and source_spot["actLocation"] != "":
-                spot.sig_refs[0].name = source_spot["actLocation"]
-
             # Extract a de_call if it's in the comment but not in the "actSpoter" field
             m = re.search(r"\(de ([A-Za-z0-9]*)\)", spot.comment)
             if not spot.de_call and m:
                 spot.de_call = m.group(1)
 
-            # Log a warning for the developer if PnP gives us an unknown programme we've never seen before
+            # Record SIG information. Sometimes we get a "SIG" of "QRP", which we ignore as it's not a programme with a
-            if spot.sig_refs[0].sig not in ["POTA", "SOTA", "WWFF", "SIOTA", "ZLOTA", "KRMNPA"]:
+            # defined set of references
-                logging.warn("PNP spot found with sig " + spot.sig + ", developer needs to add support for this!")
+            sig = source_spot["actClass"].upper()
+            sig_ref = source_spot["actSiteID"]
+            if sig and sig != "" and sig != "QRP" and sig_ref and sig_ref != "":
+                spot.sig = sig
+                spot.sig_refs = [SIGRef(id=source_spot["actSiteID"], sig=source_spot["actClass"].upper())]
 
-            # If this is POTA, SOTA, WWFF or ZLOTA data we already have it through other means, so ignore. Otherwise,
+                # Free text location is not present in all spots, so only add it if it's set
-            # add to the spot list.
+                if "actLocation" in source_spot and source_spot["actLocation"] != "":
-            if spot.sig_refs[0].sig not in ["POTA", "SOTA", "WWFF", "ZLOTA"]:
+                    spot.sig_refs[0].name = source_spot["actLocation"]
+
+                # Log a warning for the developer if PnP gives us an unknown programme we've never seen before
+                if sig not in ["POTA", "SOTA", "WWFF", "SIOTA", "ZLOTA", "KRMNPA"]:
+                    logging.warning("PNP spot found with sig " + sig + ", developer needs to add support for this!")
+
+            # Add new spot to the list
             new_spots.append(spot)
         return new_spots

spotproviders/pota.py

@@ -7,15 +7,16 @@ from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-# Spot provider for Parks on the Air
 class POTA(HTTPSpotProvider):
+    """Spot provider for Parks on the Air"""
+
     POLL_INTERVAL_SEC = 120
     SPOTS_URL = "https://api.pota.app/spot/activator"
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.SPOTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_spots(self, http_response):
+    def _http_response_to_spots(self, http_response):
         new_spots = []
         # Iterate through source data
         for source_spot in http_response.json():

spotproviders/rbn.py

@@ -12,59 +12,58 @@ from data.spot import Spot
 from spotproviders.spot_provider import SpotProvider
 
 
-# Spot provider for the Reverse Beacon Network. Connects to a single port, if you want both CW/RTTY (port 7000) and FT8
-# (port 7001) you need to instantiate two copies of this. The port is provided as an argument to the constructor.
 class RBN(SpotProvider):
-    CALLSIGN_PATTERN = "([a-z|0-9|/]+)"
+    """Spot provider for the Reverse Beacon Network. Connects to a single port, if you want both CW/RTTY (port 7000) and FT8
-    FREQUENCY_PATTERM = "([0-9|.]+)"
+    (port 7001) you need to instantiate two copies of this. The port is provided as an argument to the constructor."""
-    LINE_PATTERN = re.compile(
+
-        "^DX de " + CALLSIGN_PATTERN + "-.*:\\s+" + FREQUENCY_PATTERM + "\\s+" + CALLSIGN_PATTERN + "\\s+(.*)\\s+(\\d{4}Z)",
+    _LINE_PATTERN = re.compile(
+        r"^DX de ([a-z0-9/]+)-.*:\s+([0-9.]+)\s+([a-z0-9/]+)\s+(.*)\s+(\d{4}Z)",
         re.IGNORECASE)
 
-    # Constructor requires port number.
     def __init__(self, provider_config):
-        super().__init__(provider_config)
+        """Constructor requires port number."""
-        self.port = provider_config["port"]
-        self.telnet = None
-        self.thread = Thread(target=self.handle)
-        self.thread.daemon = True
-        self.run = True
 
+        super().__init__(provider_config)
+        self._port = provider_config["port"]
+        self._telnet = None
+        self._thread = Thread(target=self._handle)
+        self._thread.daemon = True
+        self._running = True
 
     def start(self):
-        self.thread.start()
+        self._thread.start()
 
     def stop(self):
-        self.run = False
+        self._running = False
-        self.telnet.close()
+        self._telnet.close()
-        self.thread.join()
+        self._thread.join()
 
-    def handle(self):
+    def _handle(self):
-        while self.run:
+        while self._running:
             connected = False
-            while not connected and self.run:
+            while not connected and self._running:
                 try:
                     self.status = "Connecting"
-                    logging.info("RBN port " + str(self.port) + " connecting...")
+                    logging.info("RBN port " + str(self._port) + " connecting...")
-                    self.telnet = telnetlib3.Telnet("telnet.reversebeacon.net", self.port)
+                    self._telnet = telnetlib3.Telnet("telnet.reversebeacon.net", self._port)
-                    telnet_output = self.telnet.read_until("Please enter your call: ".encode("latin-1"))
+                    telnet_output = self._telnet.read_until("Please enter your call: ".encode("latin-1"))
-                    self.telnet.write((SERVER_OWNER_CALLSIGN + "\n").encode("latin-1"))
+                    self._telnet.write((SERVER_OWNER_CALLSIGN + "\n").encode("latin-1"))
                     connected = True
-                    logging.info("RBN port " + str(self.port) + " connected.")
+                    logging.info("RBN port " + str(self._port) + " connected.")
-                except Exception as e:
+                except Exception:
                     self.status = "Error"
-                    logging.exception("Exception while connecting to RBN (port " + str(self.port) + ").")
+                    logging.exception("Exception while connecting to RBN (port " + str(self._port) + ").")
                     sleep(5)
 
             self.status = "Waiting for Data"
-            while connected and self.run:
+            while connected and self._running:
                 try:
                     # Check new telnet info against regular expression
-                    telnet_output = self.telnet.read_until("\n".encode("latin-1"))
+                    telnet_output = self._telnet.read_until("\n".encode("latin-1"))
-                    match = self.LINE_PATTERN.match(telnet_output.decode("latin-1"))
+                    match = self._LINE_PATTERN.match(telnet_output.decode("latin-1"))
                     if match:
                         spot_time = datetime.strptime(match.group(5), "%H%MZ")
-                        spot_datetime = datetime.combine(datetime.today(), spot_time.time()).replace(tzinfo=pytz.UTC)
+                        spot_datetime = datetime.combine(datetime.now(pytz.UTC).date(), spot_time.time(), tzinfo=pytz.UTC)
                         spot = Spot(source=self.name,
                                     dx_call=match.group(3),
                                     de_call=match.group(1),
@@ -73,20 +72,20 @@ class RBN(SpotProvider):
                                     time=spot_datetime.timestamp())
 
                         # Add to our list
-                        self.submit(spot)
+                        self._submit(spot)
 
                         self.status = "OK"
                         self.last_update_time = datetime.now(pytz.UTC)
-                        logging.debug("Data received from RBN on port " + str(self.port) + ".")
+                        logging.debug("Data received from RBN on port " + str(self._port) + ".")
 
-                except Exception as e:
+                except Exception:
                     connected = False
-                    if self.run:
+                    if self._running:
                         self.status = "Error"
-                        logging.exception("Exception in RBN provider (port " + str(self.port) + ")")
+                        logging.exception("Exception in RBN provider (port " + str(self._port) + ")")
                         sleep(5)
                     else:
-                        logging.info("RBN provider (port " + str(self.port) + ") shutting down...")
+                        logging.info("RBN provider (port " + str(self._port) + ") shutting down...")
                         self.status = "Shutting down"
 
             self.status = "Disconnected"

spotproviders/sota.py

@@ -8,8 +8,9 @@ from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-# Spot provider for Summits on the Air
 class SOTA(HTTPSpotProvider):
+    """Spot provider for Summits on the Air"""
+
     POLL_INTERVAL_SEC = 120
     # SOTA wants us to check for an "epoch" from the API and see if it's actually changed before querying the main data
     # APIs. So it's actually the EPOCH_URL that we pass into the constructor and get the superclass to call on a timer.
@@ -21,13 +22,13 @@ class SOTA(HTTPSpotProvider):
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.EPOCH_URL, self.POLL_INTERVAL_SEC)
-        self.api_epoch = ""
+        self._api_epoch = ""
 
-    def http_response_to_spots(self, http_response):
+    def _http_response_to_spots(self, http_response):
         # OK, source data is actually just the epoch at this point. We'll then go on to fetch real data if we know this
         # has changed.
-        epoch_changed = http_response.text != self.api_epoch
+        epoch_changed = http_response.text != self._api_epoch
-        self.api_epoch = http_response.text
+        self._api_epoch = http_response.text
 
         new_spots = []
         # OK, if the epoch actually changed, now we make the real request for data.
@@ -41,11 +42,14 @@ class SOTA(HTTPSpotProvider):
                             dx_call=source_spot["activatorCallsign"].upper(),
                             dx_name=source_spot["activatorName"],
                             de_call=source_spot["callsign"].upper(),
-                            freq=(float(source_spot["frequency"]) * 1000000) if (source_spot["frequency"] is not None) else None, # Seen SOTA spots with no frequency!
+                            freq=(float(source_spot["frequency"]) * 1000000) if (
+                                        source_spot["frequency"] is not None) else None,
+                            # Seen SOTA spots with no frequency!
                             mode=source_spot["mode"].upper(),
                             comment=source_spot["comments"],
                             sig="SOTA",
-                            sig_refs=[SIGRef(id=source_spot["summitCode"], sig="SOTA", name=source_spot["summitName"], activation_score=source_spot["points"])],
+                            sig_refs=[SIGRef(id=source_spot["summitCode"], sig="SOTA", name=source_spot["summitName"],
+                                             activation_score=source_spot["points"])],
                             time=datetime.fromisoformat(source_spot["timeStamp"].replace("Z", "+00:00")).timestamp())
 
                 # Add to our list. Don't worry about de-duping, removing old spots etc. at this point; other code will do

spotproviders/spot_provider.py

@@ -5,59 +5,66 @@ import pytz
 from core.config import MAX_SPOT_AGE
 
 
-# Generic spot provider class. Subclasses of this query the individual APIs for data.
 class SpotProvider:
+    """Generic spot provider class. Subclasses of this query the individual APIs for data."""
 
-    # Constructor
     def __init__(self, provider_config):
+        """Constructor"""
+
         self.name = provider_config["name"]
         self.enabled = provider_config["enabled"]
         self.last_update_time = datetime.min.replace(tzinfo=pytz.UTC)
         self.last_spot_time = datetime.min.replace(tzinfo=pytz.UTC)
         self.status = "Not Started" if self.enabled else "Disabled"
-        self.spots = None
+        self._spots = None
-        self.web_server = None
+        self._web_server = None
 
-    # Set up the provider, e.g. giving it the spot list to work from
     def setup(self, spots, web_server):
-        self.spots = spots
+        """Set up the provider, e.g. giving it the spot list to work from"""
-        self.web_server = web_server
+
+        self._spots = spots
+        self._web_server = web_server
 
-    # Start the provider. This should return immediately after spawning threads to access the remote resources
     def start(self):
+        """Start the provider. This should return immediately after spawning threads to access the remote resources"""
+
         raise NotImplementedError("Subclasses must implement this method")
 
-    # Submit a batch of spots retrieved from the provider. Only spots that are newer than the last spot retrieved
+    def _submit_batch(self, spots):
-    # by this provider will be added to the spot list, to prevent duplications. Spots passing the check will also have
+        """Submit a batch of spots retrieved from the provider. Only spots that are newer than the last spot retrieved
-    # their infer_missing() method called to complete their data set. This is called by the API-querying
+        by this provider will be added to the spot list, to prevent duplications. Spots passing the check will also have
-    # subclasses on receiving spots.
+        their infer_missing() method called to complete their data set. This is called by the API-querying
-    def submit_batch(self, spots):
+        subclasses on receiving spots."""
+
         # Sort the batch so that earliest ones go in first. This helps keep the ordering correct when spots are fired
         # off to SSE listeners.
-        spots = sorted(spots, key=lambda spot: (spot.time if spot and spot.time else 0))
+        spots = sorted(spots, key=lambda s: (s.time if s and s.time else 0))
         for spot in spots:
             if datetime.fromtimestamp(spot.time, pytz.UTC) > self.last_spot_time:
                 # Fill in any blanks and add to the list
                 spot.infer_missing()
-                self.add_spot(spot)
+                self._add_spot(spot)
+        if spots:
             self.last_spot_time = datetime.fromtimestamp(max(map(lambda s: s.time, spots)), pytz.UTC)
 
-    # Submit a single spot retrieved from the provider. This will be added to the list regardless of its age. Spots
+    def _submit(self, spot):
-    # passing the check will also have their infer_missing() method called to complete their data set. This is called by
+        """Submit a single spot retrieved from the provider. This will be added to the list regardless of its age. Spots
-    # the data streaming subclasses, which can be relied upon not to re-provide old spots.
+        passing the check will also have their infer_missing() method called to complete their data set. This is called by
-    def submit(self, spot):
+        the data streaming subclasses, which can be relied upon not to re-provide old spots."""
+
         # Fill in any blanks and add to the list
         spot.infer_missing()
-        self.add_spot(spot)
+        self._add_spot(spot)
         self.last_spot_time = datetime.fromtimestamp(spot.time, pytz.UTC)
 
-    def add_spot(self, spot):
+    def _add_spot(self, spot):
         if not spot.expired():
-            self.spots.add(spot.id, spot, expire=MAX_SPOT_AGE)
+            self._spots.add(spot.id, spot, expire=MAX_SPOT_AGE)
             # Ping the web server in case we have any SSE connections that need to see this immediately
-            if self.web_server:
+            if self._web_server:
-                self.web_server.notify_new_spot(spot)
+                self._web_server.notify_new_spot(spot)
 
-    # Stop any threads and prepare for application shutdown
     def stop(self):
+        """Stop any threads and prepare for application shutdown"""
+
         raise NotImplementedError("Subclasses must implement this method")

spotproviders/sse_spot_provider.py

@@ -10,30 +10,30 @@ from core.constants import HTTP_HEADERS
 from spotproviders.spot_provider import SpotProvider
 
 
-# Spot provider using Server-Sent Events.
 class SSESpotProvider(SpotProvider):
+    """Spot provider using Server-Sent Events."""
 
     def __init__(self, provider_config, url):
         super().__init__(provider_config)
-        self.url = url
+        self._url = url
-        self.event_source = None
+        self._event_source = None
-        self.thread = None
+        self._thread = None
-        self.stopped = False
+        self._stopped = False
-        self.last_event_id = None
+        self._last_event_id = None
 
     def start(self):
         logging.info("Set up SSE connection to " + self.name + " spot API.")
-        self.stopped = False
+        self._stopped = False
-        self.thread = Thread(target=self.run)
+        self._thread = Thread(target=self._run)
-        self.thread.daemon = True
+        self._thread.daemon = True
-        self.thread.start()
+        self._thread.start()
 
     def stop(self):
-        self.stopped = True
+        self._stopped = True
-        if self.event_source:
+        if self._event_source:
-            self.event_source.close()
+            self._event_source.close()
-        if self.thread:
+        if self._thread:
-            self.thread.join()
+            self._thread.join()
 
     def _on_open(self):
         self.status = "Waiting for Data"
@@ -41,37 +41,39 @@ class SSESpotProvider(SpotProvider):
     def _on_error(self):
         self.status = "Connecting"
 
-    def run(self):
+    def _run(self):
-        while not self.stopped:
+        while not self._stopped:
             try:
                 logging.debug("Connecting to " + self.name + " spot API...")
                 self.status = "Connecting"
-                with EventSource(self.url, headers=HTTP_HEADERS, latest_event_id=self.last_event_id, timeout=30,
+                with EventSource(self._url, headers=HTTP_HEADERS, latest_event_id=self._last_event_id, timeout=30,
                                  on_open=self._on_open, on_error=self._on_error) as event_source:
-                    self.event_source = event_source
+                    self._event_source = event_source
-                    for event in self.event_source:
+                    for event in self._event_source:
                         if event.type == 'message':
                             try:
-                                self.last_event_id = event.last_event_id
+                                self._last_event_id = event.last_event_id
-                                new_spot = self.sse_message_to_spot(event.data)
+                                new_spot = self._sse_message_to_spot(event.data)
                                 if new_spot:
-                                    self.submit(new_spot)
+                                    self._submit(new_spot)
 
                                 self.status = "OK"
                                 self.last_update_time = datetime.now(pytz.UTC)
                                 logging.debug("Received data from " + self.name + " spot API.")
 
-                            except Exception as e:
+                            except Exception:
-                                logging.exception("Exception processing message from SSE Spot Provider (" + self.name + ")")
+                                logging.exception(
+                                    "Exception processing message from SSE Spot Provider (" + self.name + ")")
 
-            except Exception as e:
+            except Exception:
                 self.status = "Error"
                 logging.exception("Exception in SSE Spot Provider (" + self.name + ")")
             else:
                 self.status = "Disconnected"
             sleep(5)  # Wait before trying to reconnect
 
-    # Convert an SSE message received from the API into a spot. The whole message data is provided here so the subclass
+    def _sse_message_to_spot(self, message_data):
-    # implementations can handle the message as JSON, XML, text, whatever the API actually provides.
+        """Convert an SSE message received from the API into a spot. The whole message data is provided here so the subclass
-    def sse_message_to_spot(self, message_data):
+        implementations can handle the message as JSON, XML, text, whatever the API actually provides."""
+
         raise NotImplementedError("Subclasses must implement this method")

spotproviders/ukpacketnet.py

@@ -7,15 +7,16 @@ from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-# Spot provider for UK Packet Radio network API
 class UKPacketNet(HTTPSpotProvider):
+    """Spot provider for UK Packet Radio network API"""
+
     POLL_INTERVAL_SEC = 600
     SPOTS_URL = "https://nodes.ukpacketradio.network/api/nodedata"
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.SPOTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_spots(self, http_response):
+    def _http_response_to_spots(self, http_response):
         new_spots = []
         # Iterate through source data
         nodes = http_response.json()["nodes"]
@@ -35,20 +36,26 @@ class UKPacketNet(HTTPSpotProvider):
                                 # First build a "full" comment combining some of the extra info
                                 comment = listed_port["comment"] if "comment" in listed_port else ""
                                 comment = (comment + " " + listed_port["mode"]) if "mode" in listed_port else comment
-                                comment = (comment + " " + listed_port["modulation"]) if "modulation" in listed_port else comment
+                                comment = (comment + " " + listed_port[
-                                comment = (comment + " " + str(listed_port["baud"]) + " baud") if "baud" in listed_port and listed_port["baud"] > 0 else comment
+                                    "modulation"]) if "modulation" in listed_port else comment
+                                comment = (comment + " " + str(
+                                    listed_port["baud"]) + " baud") if "baud" in listed_port and listed_port[
+                                    "baud"] > 0 else comment
 
                                 # Get frequency from the comment if it's not set properly in the data structure. This is
                                 # very hacky but a lot of node comments contain their frequency as the first or second
                                 # word of their comment, but not in the proper data structure field.
-                                freq = listed_port["freq"] if "freq" in listed_port and listed_port["freq"] > 0 else None
+                                freq = listed_port["freq"] if "freq" in listed_port and listed_port[
+                                    "freq"] > 0 else None
                                 if not freq and comment:
                                     possible_freq = comment.split(" ")[0].upper().replace("MHZ", "")
-                                    if re.match(r"^[0-9.]+$", possible_freq) and possible_freq != "1200" and possible_freq != "9600":
+                                    if re.match(r"^[0-9.]+$",
+                                                possible_freq) and possible_freq != "1200" and possible_freq != "9600":
                                         freq = float(possible_freq) * 1000000
                                     if not freq and len(comment.split(" ")) > 1:
                                         possible_freq = comment.split(" ")[1].upper().replace("MHZ", "")
-                                        if re.match(r"^[0-9.]+$", possible_freq) and possible_freq != "1200" and possible_freq != "9600":
+                                        if re.match(r"^[0-9.]+$",
+                                                    possible_freq) and possible_freq != "1200" and possible_freq != "9600":
                                             freq = float(possible_freq) * 1000000
                                     # Check for a found frequency likely having been in kHz, sorry to all GHz packet folks
                                     if freq and freq > 1000000000:
@@ -61,8 +68,10 @@ class UKPacketNet(HTTPSpotProvider):
                                             freq=freq,
                                             mode="PKT",
                                             comment=comment,
-                                            time=datetime.strptime(heard["lastHeard"], "%Y-%m-%d %H:%M:%S").replace(tzinfo=pytz.UTC).timestamp(),
+                                            time=datetime.strptime(heard["lastHeard"], "%Y-%m-%d %H:%M:%S").replace(
-                                            de_grid=node["location"]["locator"] if "locator" in node["location"] else None,
+                                                tzinfo=pytz.UTC).timestamp(),
+                                            de_grid=node["location"]["locator"] if "locator" in node[
+                                                "location"] else None,
                                             de_latitude=node["location"]["coords"]["lat"],
                                             de_longitude=node["location"]["coords"]["lon"])
 
@@ -77,7 +86,8 @@ class UKPacketNet(HTTPSpotProvider):
         # data, and we can use that to look these up.
         for spot in new_spots:
             if spot.dx_call in nodes:
-                spot.dx_grid = nodes[spot.dx_call]["location"]["locator"] if "locator" in nodes[spot.dx_call]["location"] else None
+                spot.dx_grid = nodes[spot.dx_call]["location"]["locator"] if "locator" in nodes[spot.dx_call][
+                    "location"] else None
                 spot.dx_latitude = nodes[spot.dx_call]["location"]["coords"]["lat"]
                 spot.dx_longitude = nodes[spot.dx_call]["location"]["coords"]["lon"]
 

spotproviders/websocket_spot_provider.py

@@ -10,30 +10,30 @@ from core.constants import HTTP_HEADERS
 from spotproviders.spot_provider import SpotProvider
 
 
-# Spot provider using websockets.
 class WebsocketSpotProvider(SpotProvider):
+    """Spot provider using websockets."""
 
     def __init__(self, provider_config, url):
         super().__init__(provider_config)
-        self.url = url
+        self._url = url
-        self.ws = None
+        self._ws = None
-        self.thread = None
+        self._thread = None
-        self.stopped = False
+        self._stopped = False
-        self.last_event_id = None
+        self._last_event_id = None
 
     def start(self):
         logging.info("Set up websocket connection to " + self.name + " spot API.")
-        self.stopped = False
+        self._stopped = False
-        self.thread = Thread(target=self.run)
+        self._thread = Thread(target=self._run)
-        self.thread.daemon = True
+        self._thread.daemon = True
-        self.thread.start()
+        self._thread.start()
 
     def stop(self):
-        self.stopped = True
+        self._stopped = True
-        if self.ws:
+        if self._ws:
-            self.ws.close()
+            self._ws.close()
-        if self.thread:
+        if self._thread:
-            self.thread.join()
+            self._thread.join()
 
     def _on_open(self):
         self.status = "Waiting for Data"
@@ -41,26 +41,27 @@ class WebsocketSpotProvider(SpotProvider):
     def _on_error(self):
         self.status = "Connecting"
 
-    def run(self):
+    def _run(self):
-        while not self.stopped:
+        while not self._stopped:
             try:
                 logging.debug("Connecting to " + self.name + " spot API...")
                 self.status = "Connecting"
-                self.ws = create_connection(self.url, header=HTTP_HEADERS)
+                self._ws = create_connection(self._url, header=HTTP_HEADERS)
                 self.status = "Connected"
-                data = self.ws.recv()
+                data = self._ws.recv()
                 if data:
                     try:
-                        new_spot = self.ws_message_to_spot(data)
+                        new_spot = self._ws_message_to_spot(data)
                         if new_spot:
-                            self.submit(new_spot)
+                            self._submit(new_spot)
 
                         self.status = "OK"
                         self.last_update_time = datetime.now(pytz.UTC)
                         logging.debug("Received data from " + self.name + " spot API.")
 
-                    except Exception as e:
+                    except Exception:
-                        logging.exception("Exception processing message from Websocket Spot Provider (" + self.name + ")")
+                        logging.exception(
+                            "Exception processing message from Websocket Spot Provider (" + self.name + ")")
 
             except Exception as e:
                 self.status = "Error"
@@ -69,7 +70,8 @@ class WebsocketSpotProvider(SpotProvider):
                 self.status = "Disconnected"
             sleep(5)  # Wait before trying to reconnect
 
-    # Convert a WS message received from the API into a spot. The exact message data (in bytes) is provided here so the
+    def _ws_message_to_spot(self, b):
-    # subclass implementations can handle the message as string, JSON, XML, whatever the API actually provides.
+        """Convert a WS message received from the API into a spot. The exact message data (in bytes) is provided here so the
-    def ws_message_to_spot(self, bytes):
+        subclass implementations can handle the message as string, JSON, XML, whatever the API actually provides."""
+
         raise NotImplementedError("Subclasses must implement this method")

spotproviders/wota.py

@@ -10,8 +10,9 @@ from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-# Spot provider for Wainwrights on the Air
 class WOTA(HTTPSpotProvider):
+    """Spot provider for Wainwrights on the Air"""
+
     POLL_INTERVAL_SEC = 120
     SPOTS_URL = "https://www.wota.org.uk/spots_rss.php"
     LIST_URL = "https://www.wota.org.uk/mapping/data/summits.json"
@@ -20,7 +21,7 @@ class WOTA(HTTPSpotProvider):
     def __init__(self, provider_config):
         super().__init__(provider_config, self.SPOTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_spots(self, http_response):
+    def _http_response_to_spots(self, http_response):
         new_spots = []
         rss = RSSParser.parse(http_response.content.decode())
         # Iterate through source data
@@ -47,6 +48,7 @@ class WOTA(HTTPSpotProvider):
                 freq_mode = desc_split[0].replace("Frequencies/modes:", "").strip()
                 freq_mode_split = re.split(r'[\-\s]+', freq_mode)
                 freq_hz = float(freq_mode_split[0]) * 1000000
+                mode = None
                 if len(freq_mode_split) > 1:
                     mode = freq_mode_split[1].upper()
 

spotproviders/wwbota.py

@@ -6,14 +6,15 @@ from data.spot import Spot
 from spotproviders.sse_spot_provider import SSESpotProvider
 
 
-# Spot provider for Worldwide Bunkers on the Air
 class WWBOTA(SSESpotProvider):
+    """Spot provider for Worldwide Bunkers on the Air"""
+
     SPOTS_URL = "https://api.wwbota.net/spots/"
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.SPOTS_URL)
 
-    def sse_message_to_spot(self, message):
+    def _sse_message_to_spot(self, message):
         source_spot = json.loads(message)
         # Convert to our spot format. First we unpack references, because WWBOTA spots can have more than one for
         # n-fer activations.

spotproviders/wwff.py

@@ -7,15 +7,16 @@ from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-# Spot provider for Worldwide Flora & Fauna
 class WWFF(HTTPSpotProvider):
+    """Spot provider for Worldwide Flora & Fauna"""
+
     POLL_INTERVAL_SEC = 120
     SPOTS_URL = "https://spots.wwff.co/static/spots.json"
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.SPOTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_spots(self, http_response):
+    def _http_response_to_spots(self, http_response):
         new_spots = []
         # Iterate through source data
         for source_spot in http_response.json():

spotproviders/wwtota.py

@@ -1,22 +1,22 @@
 from datetime import datetime
 
 import json
-import pytz
 
 from data.sig_ref import SIGRef
 from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-# Spot provider for Towers on the Air
 class WWTOTA(HTTPSpotProvider):
+    """Spot provider for Towers on the Air"""
+
     POLL_INTERVAL_SEC = 120
     SPOTS_URL = "https://wwtota.com/api/cluster_live.php"
 
     def __init__(self, provider_config):
         super().__init__(provider_config, self.SPOTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_spots(self, http_response):
+    def _http_response_to_spots(self, http_response):
         new_spots = []
         response_fixed = http_response.text.replace("\\/", "/")
         response_json = json.loads(response_fixed)
@@ -33,7 +33,8 @@ class WWTOTA(HTTPSpotProvider):
                         comment=source_spot["comment"],
                         sig="WWTOTA",
                         sig_refs=[SIGRef(id=source_spot["ref"], sig="WWTOTA")],
-                        time=datetime.strptime(response_json["updated"][:10] + source_spot["time"], "%Y-%m-%d%H:%M").timestamp())
+                        time=datetime.strptime(response_json["updated"][:10] + source_spot["time"],
+                                               "%Y-%m-%d%H:%M").timestamp())
 
             # Add to our list. Don't worry about de-duping, removing old spots etc. at this point; other code will do
             # that for us.

spotproviders/xota.py

@@ -10,12 +10,13 @@ from data.spot import Spot
 from spotproviders.websocket_spot_provider import WebsocketSpotProvider
 
 
-# Spot provider for servers based on the "xOTA" software at https://github.com/nischu/xOTA/
-# The provider typically doesn't give us a lat/lon or SIG explicitly, so our own config provides a SIG and a reference
-# to a local CSV file with location information. This functionality is implemented for TOTA events, of which there are
-# several - so a plain lookup of a "TOTA reference" doesn't make sense, it depends on which TOTA and hence which server
-# supplied the data, which is why the CSV location lookup is here and not in sig_utils.
 class XOTA(WebsocketSpotProvider):
+    """Spot provider for servers based on the "xOTA" software at https://github.com/nischu/xOTA/
+    The provider typically doesn't give us a lat/lon or SIG explicitly, so our own config provides a SIG and a reference
+    to a local CSV file with location information. This functionality is implemented for TOTA events, of which there are
+    several - so a plain lookup of a "TOTA reference" doesn't make sense, it depends on which TOTA and hence which server
+    supplied the data, which is why the CSV location lookup is here and not in sig_utils."""
+
     LOCATION_DATA = {}
     SIG = None
 
@@ -35,8 +36,8 @@ class XOTA(WebsocketSpotProvider):
             except:
                 logging.exception("Could not look up location data for XOTA source.")
 
-    def ws_message_to_spot(self, bytes):
+    def _ws_message_to_spot(self, b):
-        string = bytes.decode("utf-8")
+        string = b.decode("utf-8")
         source_spot = json.loads(string)
         ref_id = source_spot["reference"]["title"]
         lat = float(self.LOCATION_DATA[ref_id]["lat"]) if ref_id in self.LOCATION_DATA else None
@@ -47,7 +48,8 @@ class XOTA(WebsocketSpotProvider):
                     freq=float(source_spot["freq"]) * 1000,
                     mode=source_spot["mode"].upper(),
                     sig=self.SIG,
-                    sig_refs=[SIGRef(id=ref_id, sig=self.SIG, url=source_spot["reference"]["website"], latitude=lat, longitude=lon)],
+                    sig_refs=[SIGRef(id=ref_id, sig=self.SIG, url=source_spot["reference"]["website"], latitude=lat,
+                                     longitude=lon)],
                     time=datetime.now(pytz.UTC).timestamp(),
                     dx_latitude=lat,
                     dx_longitude=lon,

spotproviders/zlota.py

@@ -7,8 +7,9 @@ from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-# Spot provider for ZLOTA
 class ZLOTA(HTTPSpotProvider):
+    """Spot provider for ZLOTA"""
+
     POLL_INTERVAL_SEC = 120
     SPOTS_URL = "https://ontheair.nz/api/spots?zlota_only=true"
     LIST_URL = "https://ontheair.nz/assets/assets.json"
@@ -16,7 +17,7 @@ class ZLOTA(HTTPSpotProvider):
     def __init__(self, provider_config):
         super().__init__(provider_config, self.SPOTS_URL, self.POLL_INTERVAL_SEC)
 
-    def http_response_to_spots(self, http_response):
+    def _http_response_to_spots(self, http_response):
         new_spots = []
         # Iterate through source data
         for source_spot in http_response.json():
@@ -35,7 +36,8 @@ class ZLOTA(HTTPSpotProvider):
                         comment=source_spot["comments"],
                         sig="ZLOTA",
                         sig_refs=[SIGRef(id=source_spot["reference"], sig="ZLOTA", name=source_spot["name"])],
-                        time=datetime.fromisoformat(source_spot["referenced_time"].replace("Z", "+00:00")).astimezone(pytz.UTC).timestamp())
+                        time=datetime.fromisoformat(source_spot["referenced_time"].replace("Z", "+00:00")).astimezone(
+                            pytz.UTC).timestamp())
 
             new_spots.append(spot)
         return new_spots

templates/about.html

@@ -62,11 +62,11 @@
     <p>Spothole is open source, so you can audit <a href="https://git.ianrenton.com/ian/spothole">the code</a> if you like.</p>
     <h2 class="mt-4">Thanks</h2>
     <p>This project would not have been possible without those volunteers who have taken it upon themselves to run DX clusters, xOTA programmes, DXpedition lists, callsign lookup databases, and other online tools on which Spothole's data is based.</p>
-    <p>Spothole is also dependent on a number of Python libraries, in particular pyhamtools, and many JavaScript libraries, as well as the Font Awesome icon set and flag icons from the Noto Color Emoji set.</p>
+    <p>Spothole is also dependent on a number of Python libraries, in particular pyhamtools, and many JavaScript libraries, as well as the Font Awesome icon set and flag icons from the Noto Color Emoji set, and MIT-licenced GeoJSON files for CQ and ITU zones from HA8TKS.</p>
     <p>This software is dedicated to the memory of Tom G1PJB, SK, a friend and colleague who sadly passed away around the time I started writing it in Autumn 2025. I was looking forward to showing it to you when it was done.</p>
 </div>
 
-<script src="/js/common.js?v=8"></script>
+<script src="/js/common.js?v=1773090023"></script>
 <script>$(document).ready(function() { $("#nav-link-about").addClass("active"); }); <!-- highlight active page in nav --></script>
 
 {% end %}

templates/add_spot.html

@@ -69,8 +69,8 @@
 
 </div>
 
-<script src="/js/common.js?v=8"></script>
+<script src="/js/common.js?v=1773090023"></script>
-<script src="/js/add-spot.js?v=8"></script>
+<script src="/js/add-spot.js?v=1773090023"></script>
 <script>$(document).ready(function() { $("#nav-link-add-spot").addClass("active"); }); <!-- highlight active page in nav --></script>
 
 {% end %}

templates/alerts.html

@@ -56,8 +56,8 @@
 
 </div>
 
-<script src="/js/common.js?v=8"></script>
+<script src="/js/common.js?v=1773090023"></script>
-<script src="/js/alerts.js?v=8"></script>
+<script src="/js/alerts.js?v=1773090023"></script>
 <script>$(document).ready(function() { $("#nav-link-alerts").addClass("active"); }); <!-- highlight active page in nav --></script>
 
 {% end %}

templates/bands.html

@@ -62,9 +62,9 @@
 <script>
     let spotProvidersEnabledByDefault = {% raw json_encode(web_ui_options["spot-providers-enabled-by-default"]) %};
 </script>
-<script src="/js/common.js?v=8"></script>
+<script src="/js/common.js?v=1773090023"></script>
-<script src="/js/spotsbandsandmap.js?v=8"></script>
+<script src="/js/spotsbandsandmap.js?v=1773090023"></script>
-<script src="/js/bands.js?v=8"></script>
+<script src="/js/bands.js?v=1773090023"></script>
 <script>$(document).ready(function() { $("#nav-link-bands").addClass("active"); }); <!-- highlight active page in nav --></script>
 
 {% end %}

templates/base.html

@@ -13,10 +13,10 @@
     <meta property="twitter:title" content="Spothole"/>
     <meta name="description" content="An Amateur Radio spotting tool bringing together DX clusters and outdoor programmes, providing a universal JSON API and web interface."/>
     <meta property="og:description" content="An Amateur Radio spotting tool bringing together DX clusters and outdoor programmes, providing a universal JSON API and web interface."/>
-    <link rel="canonical" href="https://spothole.app/"/>
+    <link rel="canonical" href="{{ baseurl }}{{ current_path }}"/>
-    <meta property="og:url" content="https://spothole.app/"/>
+    <meta property="og:url" content="{{ baseurl }}{{ current_path }}"/>
-    <meta property="og:image" content="https://spothole.app/img/banner.png"/>
+    <meta property="og:image" content="{{ baseurl }}/img/banner.png"/>
-    <meta property="twitter:image" content="https://spothole.app/img/banner.png"/>
+    <meta property="twitter:image" content="{{ baseurl }}/img/banner.png"/>
     <meta name="twitter:card" content="summary_large_image"/>
     <meta name="author" content="Ian Renton"/>
     <meta property="og:locale" content="en_GB"/>
@@ -46,10 +46,10 @@
             crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/tinycolor2@1.6.0/cjs/tinycolor.min.js"></script>
 
-    <script src="https://misc.ianrenton.com/jsutils/utils.js?v=8"></script>
+    <script src="https://misc.ianrenton.com/jsutils/utils.js?v=1773090023"></script>
-    <script src="https://misc.ianrenton.com/jsutils/storage.js?v=8"></script>
+    <script src="https://misc.ianrenton.com/jsutils/storage.js?v=1773090023"></script>
-    <script src="https://misc.ianrenton.com/jsutils/ui-ham.js?v=8"></script>
+    <script src="https://misc.ianrenton.com/jsutils/ui-ham.js?v=1773090023"></script>
-    <script src="https://misc.ianrenton.com/jsutils/geo.js?v=8"></script>
+    <script src="https://misc.ianrenton.com/jsutils/geo.js?v=1773090023"></script>
 
 </head>
 <body>

templates/map.html

@@ -70,9 +70,9 @@
 <script>
     let spotProvidersEnabledByDefault = {% raw json_encode(web_ui_options["spot-providers-enabled-by-default"]) %};
 </script>
-<script src="/js/common.js?v=8"></script>
+<script src="/js/common.js?v=1773090023"></script>
-<script src="/js/spotsbandsandmap.js?v=8"></script>
+<script src="/js/spotsbandsandmap.js?v=1773090023"></script>
-<script src="/js/map.js?v=8"></script>
+<script src="/js/map.js?v=1773090023"></script>
 <script>$(document).ready(function() { $("#nav-link-map").addClass("active"); }); <!-- highlight active page in nav --></script>
 
 {% end %}

templates/spots.html

@@ -87,9 +87,9 @@
 <script>
     let spotProvidersEnabledByDefault = {% raw json_encode(web_ui_options["spot-providers-enabled-by-default"]) %};
 </script>
-<script src="/js/common.js?v=8"></script>
+<script src="/js/common.js?v=1773090023"></script>
-<script src="/js/spotsbandsandmap.js?v=8"></script>
+<script src="/js/spotsbandsandmap.js?v=1773090023"></script>
-<script src="/js/spots.js?v=8"></script>
+<script src="/js/spots.js?v=1773090023"></script>
 <script>$(document).ready(function() { $("#nav-link-spots").addClass("active"); }); <!-- highlight active page in nav --></script>
 
 {% end %}

templates/status.html

@@ -3,8 +3,8 @@
 
 <div id="status-container" class="row row-cols-1 row-cols-md-4 g-4 mt-4"></div>
 
-<script src="/js/common.js?v=8"></script>
+<script src="/js/common.js?v=1773090023"></script>
-<script src="/js/status.js?v=8"></script>
+<script src="/js/status.js?v=1773090023"></script>
 <script>$(document).ready(function() { $("#nav-link-status").addClass("active"); }); <!-- highlight active page in nav --></script>
 
 {% end %}

webassets/.idea/.gitignore

@@ -1,10 +0,0 @@
-# Default ignored files
-/shelf/
-/workspace.xml
-# Ignored default folder with query files
-/queries/
-# Datasource local storage ignored files
-/dataSources/
-/dataSources.local.xml
-# Editor-based HTTP Client requests
-/httpRequests/

webassets/.idea/vcs.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
-  </component>
-</project>

webassets/apidocs/openapi.yml

@@ -653,6 +653,80 @@ paths:
                 example: "Failed"
 
 
+
+
+  /lookup/grid:
+    get:
+      tags:
+        - Utilities
+      summary: Look up grid details
+      description: Perform a lookup of data about a Maidenhead grid square.
+      operationId: grid
+      parameters:
+        - name: grid
+          in: query
+          description: Maidenhead grid, to any accuracy
+          required: true
+          type: string
+          example: "AA00aa"
+      responses:
+        '200':
+          description: Success
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  center:
+                    type: object
+                    properties:
+                      latitude:
+                        type: number
+                        description: Latitude of the centre of the grid reference.
+                        example: 0.0
+                      longitude:
+                        type: number
+                        description: Latitude of the centre of the grid reference.
+                        example: 0.0
+                      cq_zone:
+                        type: number
+                        description: CQ zone of the centre of the grid reference.
+                        example: 1
+                      itu_zone:
+                        type: number
+                        description: ITU zone of the centre of the grid reference.
+                        example: 1
+                  southwest:
+                    type: object
+                    properties:
+                      latitude:
+                        type: number
+                        description: Latitude of the south-west corner of the grid square.
+                        example: 0.0
+                      longitude:
+                        type: number
+                        description: Latitude of the south-west corner of the grid square.
+                        example: 0.0
+                  northeast:
+                    type: object
+                    properties:
+                      latitude:
+                        type: number
+                        description: Latitude of the north-east corner of the grid square.
+                        example: 0.0
+                      longitude:
+                        type: number
+                        description: Latitude of the north-east corner of the grid square.
+                        example: 0.0
+        '422':
+          description: Validation error e.g. reference format incorrect
+          content:
+            application/json:
+              schema:
+                type: string
+                example: "Failed"
+
+
   /spot:
     post:
       tags:

webassets/img/flags/generate.py

@@ -13,12 +13,13 @@ cache = CachedSession("/tmp/cache", expire_after=timedelta(days=30))
 data = cache.get("https://raw.githubusercontent.com/k0swe/dxcc-json/refs/heads/main/dxcc.json").json()
 
 for dxcc in data["dxcc"]:
-    id = dxcc["entityCode"]
+    dxcc_id = dxcc["entityCode"]
     flag = dxcc["flag"]
     image = Image.new("RGBA", (140, 110), (255, 0, 0, 0))
     draw = ImageDraw.Draw(image)
-    draw.text((0, -10), flag, font=ImageFont.truetype("/usr/share/fonts/truetype/noto/NotoColorEmoji.ttf", 109), embedded_color=True)
+    draw.text((0, -10), flag, font=ImageFont.truetype("/usr/share/fonts/truetype/noto/NotoColorEmoji.ttf", 109),
-    outfile = str(id) + ".png"
+              embedded_color=True)
+    outfile = str(dxcc_id) + ".png"
     image.save(outfile, "PNG")
 
 image = Image.new("RGBA", (140, 110), (255, 0, 0, 0))