Extra search and replaces in PNP spot frequencies to cope with a weird one encountered

.idea/encodings.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/datafiles/MUNICIPIOS.csv" charset="ISO-8859-1" />
+  </component>
+</project>

.idea/spothole.iml

@@ -2,6 +2,7 @@
 <module type="PYTHON_MODULE" version="4">
   <component name="NewModuleRootManager">
     <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" />
       <excludeFolder url="file://$MODULE_DIR$/.venv" />
       <excludeFolder url="file://$MODULE_DIR$/webassets/vendor" />
     </content>

README.md

@@ -19,6 +19,8 @@ Supported data sources include DX Clusters, the Reverse Beacon Network (RBN), th
 SOTA, WWFF, GMA, WWBOTA, HEMA, Parks 'n' Peaks, ZLOTA, WOTA, BOTA, LLOTA, WWTOTA, Tiles on the Air, the UK Packet
 Repeater Network, NG3K, and any site based on the xOTA software by nischu.
 
+Additional Special Interest Groups (SIGs) without their own specific data source include WAB, WAI and DME.
+
 ![Screenshot](/images/screenshot2.png)
 
 ![Screenshot](/images/screenshot3.png)
@@ -93,9 +95,9 @@ Various approaches exist to writing your own client, but in general:
   `https://spothole.app/api/v1/spots` once every few minutes. Apply filters if necessary.
 * Call the "options" API to get an idea of which bands, modes etc. the server knows about. You might want to do that
   first before calling the spots/alerts APIs, to allow you to populate your filters correctly.
-* Refer to the provided HTML/JS interface for a reference on different approaches. For example, the "map" and "bands"
+* Refer to the provided HTML/JS interface for a reference on different approaches. For example, the "alerts"/"upcoming"
-  pages simply query the main spot API on a timer, whereas the main/spots page combines this approach with using the
+  page simply query the main spot API on a timer, whereas the spots, map and bands pages combine this approach with
-  Server-Sent Events (SSE) endpoint to update live.
+  using the Server-Sent Events (SSE) endpoint to update live.
 * Let me know if you get stuck, I'm happy to help.
 
 Please don't hammer the API with an unnecessarily high request rate. For example, Spothole only queries the POTA API
@@ -515,7 +517,11 @@ 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.
+my knowledge, created by HA8TKS for his CQ and ITU zone layers for Leaflet. `/datafiles` also contains a
+`MUNICIPIOS.csv` file, from the "Nomenclátor Geográfico de Municipios y Entidades de Población" data set sourced from
+[el Centro Nacional de Información Geográfica](https://centrodedescargas.cnig.es/CentroDescargas/home).
+`didbase-stations.csv` and the TOTA CSV files were created by me based on publicly available data from GIRO and from
+maps of conference centres.
 
 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.

config-example.yml

@@ -66,8 +66,8 @@ spot-providers:
     name: "LLOTA"
     enabled: true
 
-  - class: "WWTOTA"
+  - class: "Towers"
-    name: "WWTOTA"
+    name: "Towers"
     enabled: true
 
   - class: "Tiles"

core/constants.py

@@ -11,29 +11,29 @@ HAMQTH_PRG = ("Spothole v" + SOFTWARE_VERSION + " operated by " + SERVER_OWNER_C
 
 # Special Interest Groups
 SIGS = [
-    SIG(name="POTA", description="Parks on the Air", ref_regex=r"[A-Z]{2}\-\d{4,5}"),
+    SIG(name="POTA", comment_names=["POTA"], description="Parks on the Air", ref_regex=r"[A-Z]{2}\-\d{4,5}"),
-    SIG(name="SOTA", description="Summits on the Air", ref_regex=r"[A-Z0-9]{1,3}\/[A-Z]{2}\-\d{3}"),
+    SIG(name="SOTA", comment_names=["SOTA"], description="Summits on the Air", ref_regex=r"[A-Z0-9]{1,3}\/[A-Z]{2}\-\d{3}"),
-    SIG(name="WWFF", description="World Wide Flora & Fauna", ref_regex=r"[A-Z0-9]{1,3}FF\-\d{4}"),
+    SIG(name="WWFF", comment_names=["WWFF"], description="World Wide Flora & Fauna", ref_regex=r"[A-Z0-9]{1,3}FF\-\d{4}"),
-    SIG(name="GMA", description="Global Mountain Activity", ref_regex=r"[A-Z0-9]{1,3}\/[A-Z]{2}\-\d{3}"),
+    SIG(name="GMA", comment_names=["GMA"], description="Global Mountain Activity", ref_regex=r"[A-Z0-9]{1,3}\/[A-Z]{2}\-\d{3}"),
-    SIG(name="WWBOTA", description="Worldwide Bunkers on the Air", ref_regex=r"B\/[A-Z0-9]{1,3}\-\d{3,4}"),
+    SIG(name="WWBOTA", comment_names=["WWBOTA", "BOTA"], 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="HEMA", comment_names=["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="IOTA", comment_names=["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", comment_names=["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="ARLHS", comment_names=["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="ILLW", comment_names=["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"),
+    SIG(name="SiOTA", comment_names=["SIOTA"], description="Silos on the Air", ref_regex=r"[A-Z]{2}\-[A-Z]{3}\d"),
-    SIG(name="WCA", description="World Castles Award", ref_regex=r"[A-Z0-9]{1,3}\-\d{5}"),
+    SIG(name="WCA", comment_names=["WCA"], description="World Castles Award", ref_regex=r"[A-Z0-9]{1,3}\-\d{5}"),
-    SIG(name="ZLOTA", description="New Zealand on the Air", ref_regex=r"ZL[A-Z]/[A-Z]{2}\-\d{3,4}"),
+    SIG(name="ZLOTA", comment_names=["ZLOTA"], description="New Zealand on the Air", ref_regex=r"ZL[A-Z]/[A-Z]{2}\-\d{3,4}"),
-    SIG(name="WOTA", description="Wainwrights on the Air", ref_regex=r"[A-Z]{3}-[0-9]{2}"),
+    SIG(name="WOTA", comment_names=["WOTA"], description="Wainwrights on the Air", ref_regex=r"[A-Z]{3}-[0-9]{2}"),
-    SIG(name="BOTA", description="Beaches on the Air"),
+    SIG(name="BOTA", comment_names=[], description="Beaches on the Air"),
-    SIG(name="KRMNPA", description="Keith Roget Memorial National Parks Award"),
+    SIG(name="KRMNPA", comment_names=["KRMNPA"], description="Keith Roget Memorial National Parks Award"),
-    SIG(name="LLOTA", description="Lagos y Lagunas on the Air", ref_regex=r"[A-Z]{2}\-\d{4}"),
+    SIG(name="LLOTA", comment_names=["LLOTA"], description="Lagos y Lagunas on the Air", ref_regex=r"LL[A-Z]{2}\-\d{4}"),
-    SIG(name="WWTOTA", description="Towers on the Air", ref_regex=r"[A-Z]{2}R\-\d{4}"),
+    SIG(name="Towers", comment_names=["TOTA"], description="Towers on the Air", ref_regex=r"[A-Z]{2}R\-\d{4}"),
-    SIG(name="Tiles", description="Tiles on the Air", ref_regex=r"[A-Za-z]{2}[0-9]{2}[A-Za-z]{2}"),
+    SIG(name="Tiles", comment_names=[], description="Tiles on the Air", ref_regex=r"[A-Za-z]{2}[0-9]{2}[A-Za-z]{2}"),
-    SIG(name="WAB", description="Worked All Britain", ref_regex=r"[A-Z]{1,2}[0-9]{2}"),
+    SIG(name="WAB", comment_names=["WAB"], description="Worked All Britain", ref_regex=r"[A-Z]{1,2}[0-9]{2}"),
-    SIG(name="WAI", description="Worked All Ireland", ref_regex=r"[A-Z][0-9]{2}"),
+    SIG(name="WAI", comment_names=["WAI"], description="Worked All Ireland", ref_regex=r"[A-Z][0-9]{2}"),
-    SIG(name="DME", description="Diplomas de Municipios Españoles", ref_regex=r"\d{4,5}"),
+    SIG(name="DME", comment_names=["DME"], description="Diplomas de Municipios Españoles", ref_regex=r"\d{4,5}"),
-    SIG(name="TOTA", description="Toilets on the Air", ref_regex=r"T\-[0-9]{2}")
+    SIG(name="Toilets", comment_names=[], description="Toilets on the Air", ref_regex=r"T\-[0-9]{2}")
 ]
 
 # Modes. Note "DIGI" and "DIGITAL" are also supported but are normalised into "DATA".

core/sig_utils.py

@@ -7,8 +7,10 @@ from core.cache_utils import SEMI_STATIC_URL_DATA_CACHE
 from core.constants import SIGS, HTTP_HEADERS
 from core.geo_utils import wab_wai_square_to_lat_lon
 
-with open("datafiles/dme-geodata.csv", encoding="utf-8") as _f:
+# Load Spanish municipality data for the DME programme. There's no convenient lookup API for this, so we embed the data
-    _DME_INDEX = {row["dme"]: row for row in csv.DictReader(_f)}
+# file in Spothole and load it on startup.
+with open("datafiles/MUNICIPIOS.csv", encoding="latin-1") as _f:
+    _DME_INDEX = {row["COD_INE"][:5]: row for row in csv.DictReader(_f, delimiter=";")}
 
 
 def get_ref_regex_for_sig(sig):
@@ -20,6 +22,16 @@ def get_ref_regex_for_sig(sig):
     return None
 
 
+def get_sig_name_from_comment_name(sig):
+    """Utility function to get the name of a SIG from its "comment name". Generally these will be the same but there are
+    some cases (e.g. is "TOTA" Towers, Tiles or Toilets?) where we need to transform one to the other."""
+
+    for s in SIGS:
+        if any(n.upper() == sig.upper() for n in s.comment_names):
+            return s.name
+    return None
+
+
 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.
@@ -192,11 +204,12 @@ def populate_sig_ref_info(sig_ref):
                 except:
                     logging.debug("Invalid lat/lon received for reference")
         elif sig.upper() == "DME":
-            row = _DME_INDEX.get(ref_id)
+            # Zero-pad to 5 digits to match our source data
+            row = _DME_INDEX.get(ref_id.zfill(5))
             if row:
-                sig_ref.name = row["municipio"] + ", " + row["provincia"]
+                sig_ref.name = row["NOMBRE_ACTUAL"] + ", " + row["PROVINCIA"]
-                sig_ref.latitude = float(row["lat"]) if row.get("lat") else None
+                sig_ref.latitude = float(row["LATITUD_ETRS89_REGCAN95"].replace(",", ".")) if row.get("LATITUD_ETRS89_REGCAN95") else None
-                sig_ref.longitude = float(row["lon"]) if row.get("lon") else None
+                sig_ref.longitude = float(row["LONGITUD_ETRS89_REGCAN95"].replace(",", ".")) if row.get("LONGITUD_ETRS89_REGCAN95") else None
                 if sig_ref.latitude and sig_ref.longitude:
                     try:
                         sig_ref.grid = latlong_to_locator(sig_ref.latitude, sig_ref.longitude, 6)
@@ -207,8 +220,5 @@ def populate_sig_ref_info(sig_ref):
     return sig_ref
 
 
-# Regex matching any SIG
+# Regex matching any SIG's "comment name", i.e. how it may be referred to in spot comments
-ANY_SIG_REGEX = r"(" + r"|".join(list(map(lambda p: p.name, SIGS))) + r")"
+ANY_SIG_REGEX = r"(" + r"|".join(n for s in SIGS for n in s.comment_names) + r")"
-
-# Regex matching any SIG reference
-ANY_XOTA_SIG_REF_REGEX = r"[\w\/]+\-\d+"

core/utils.py

@@ -1,8 +1,11 @@
-def serialize_everything(obj):
+import simplejson
-    """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 safe_json_dumps(obj):
-    return obj.__dict__
+    """Safe version of json.dumps that also converts objects to dicts so they can be output, and ignores NaN floats
+    which are invalid in JSON."""
+
+    return simplejson.dumps(obj, ensure_ascii=False, ignore_nan=True, default=lambda o: o.__dict__)
 
 
 def empty_queue(q):

data/sig.py

@@ -1,13 +1,21 @@
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 
 
 @dataclass
 class SIG:
-    """Data class that defines a Special Interest Group."""
+    """Data class that defines a Special Interest Group. Each contains a name and a longer form description.
+     They also contain comment_names which attempts to separate out the way people might refer to it in
+     cluster comments from how it is referred to in the UI & API. (For example, "TOTA" in cluster spot comments
+     almost always means Towers on the Air, but no single programme is referred to in the UI as "TOTA" as
+     it's ambiguous between Towers, Toilets and Tiles. And while Beaches got the name "BOTA" first, "BOTA" spots
+     are much more likely to be bunkers.) Finally, there is a ref_regex which provides a regular expression to
+     match what references (such as parks and summits) look like for that programme."""
 
-    # SIG name, e.g. "POTA"
+    # SIG name as used in the UI and API, e.g. "Towers"
     name: str
-    # Description, e.g. "Parks on the Air"
+    # Description, e.g. "Towers on the Air"
     description: str
+    # SIG names as they might appear in cluster spot comments, e.g. ["TOTA"]
+    comment_names: list[str] = field(default_factory=list)
     # Regex matcher for references, e.g. for POTA r"[A-Z]{2}\-\d+".
-    ref_regex: str = None
+    ref_regex: str | None = None

data/spot.py

@@ -14,7 +14,7 @@ from core.constants import MODE_ALIASES, PROPAGATION_MODES
 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 core.sig_utils import populate_sig_ref_info, ANY_SIG_REGEX, get_ref_regex_for_sig, get_sig_name_from_comment_name
 from data.sig_ref import SIGRef
 
 
@@ -255,7 +255,7 @@ class Spot:
             for sig_match in sig_matches:
                 # First of all, if we haven't got a SIG for this spot set yet, now we have. This covers things like cluster
                 # spots where the comment is just "POTA".
-                found_sig = sig_match.group(2).upper()
+                found_sig = get_sig_name_from_comment_name(sig_match.group(2))
                 if not self.sig:
                     self.sig = found_sig
 
@@ -312,7 +312,7 @@ class Spot:
                         self.propagation_mode = PROPAGATION_MODES[mode_tag]
                     else:
                         self.propagation_mode = mode_tag
-                        logging.info("Seen a new propagation mode tag not yet in the system: {}", mode_tag)
+                        logging.info("Seen a new propagation mode tag not yet in the system: %s", mode_tag)
 
         # DX Grid to lat/lon and vice versa in case one is missing
         if self.dx_grid and not self.dx_latitude:

requirements.txt

@@ -17,3 +17,4 @@ websocket-client~=1.8.0
 tornado~=6.4.2
 tornado_eventsource~=3.0.0
 geopandas~=0.13.2
+simplejson~=4.1.1

server/handlers/api/addspot.py

@@ -14,7 +14,7 @@ from core.constants import UNKNOWN_BAND
 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
+from core.utils import safe_json_dumps
 from data.sig_ref import SIGRef
 from data.spot import Spot
 
@@ -42,8 +42,7 @@ class APISpotHandler(tornado.web.RequestHandler):
             # Reject if not allowed
             if not ALLOW_SPOTTING:
                 self.set_status(401)
-                self.write(json.dumps("Error - this server does not allow new spots to be added via the API.",
+                self.write(safe_json_dumps("Error - this server does not allow new spots to be added via the API."))
-                                      default=serialize_everything))
                 self.set_header("Cache-Control", "no-store")
                 self.set_header("Content-Type", "application/json")
                 return
@@ -51,8 +50,7 @@ class APISpotHandler(tornado.web.RequestHandler):
             # Reject if format not json
             if not self.request.headers.get('Content-Type', '').startswith("application/json"):
                 self.set_status(415)
-                self.write(
+                self.write(safe_json_dumps("Error - request Content-Type must be application/json"))
-                    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
@@ -61,7 +59,7 @@ class APISpotHandler(tornado.web.RequestHandler):
             post_data = self.request.body
             if not post_data:
                 self.set_status(422)
-                self.write(json.dumps("Error - request body is empty", default=serialize_everything))
+                self.write(safe_json_dumps("Error - request body is empty"))
                 self.set_header("Cache-Control", "no-store")
                 self.set_header("Content-Type", "application/json")
                 return
@@ -81,8 +79,7 @@ class APISpotHandler(tornado.web.RequestHandler):
             # Reject if no timestamp, frequency, dx_call or de_call
             if not spot.time or not spot.dx_call or not spot.freq or not spot.de_call:
                 self.set_status(422)
-                self.write(json.dumps("Error - 'time', 'dx_call', 'freq' and 'de_call' must be provided as a minimum.",
+                self.write(safe_json_dumps("Error - 'time', 'dx_call', 'freq' and 'de_call' must be provided as a minimum."))
-                                      default=serialize_everything))
                 self.set_header("Cache-Control", "no-store")
                 self.set_header("Content-Type", "application/json")
                 return
@@ -90,15 +87,13 @@ class APISpotHandler(tornado.web.RequestHandler):
             # Reject invalid-looking callsigns
             if not re.match(r"^[A-Za-z0-9/\-]*$", spot.dx_call):
                 self.set_status(422)
-                self.write(json.dumps("Error - '" + spot.dx_call + "' does not look like a valid callsign.",
+                self.write(safe_json_dumps("Error - '" + spot.dx_call + "' does not look like a valid callsign."))
-                                      default=serialize_everything))
                 self.set_header("Cache-Control", "no-store")
                 self.set_header("Content-Type", "application/json")
                 return
             if not re.match(r"^[A-Za-z0-9/\-]*$", spot.de_call):
                 self.set_status(422)
-                self.write(json.dumps("Error - '" + spot.de_call + "' does not look like a valid callsign.",
+                self.write(safe_json_dumps("Error - '" + spot.de_call + "' does not look like a valid callsign."))
-                                      default=serialize_everything))
                 self.set_header("Cache-Control", "no-store")
                 self.set_header("Content-Type", "application/json")
                 return
@@ -106,8 +101,7 @@ class APISpotHandler(tornado.web.RequestHandler):
             # Reject if frequency not in a known 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.",
+                self.write(safe_json_dumps("Error - Frequency of " + str(spot.freq / 1000.0) + "kHz is not in a known band."))
-                                      default=serialize_everything))
                 self.set_header("Cache-Control", "no-store")
                 self.set_header("Content-Type", "application/json")
                 return
@@ -117,8 +111,7 @@ class APISpotHandler(tornado.web.RequestHandler):
                     r"^([A-R]{2}[0-9]{2}[A-X]{2}[0-9]{2}[A-X]{2}|[A-R]{2}[0-9]{2}[A-X]{2}[0-9]{2}|[A-R]{2}[0-9]{2}[A-X]{2}|[A-R]{2}[0-9]{2})$",
                     spot.dx_grid.upper()):
                 self.set_status(422)
-                self.write(json.dumps("Error - '" + spot.dx_grid + "' does not look like a valid Maidenhead grid.",
+                self.write(safe_json_dumps("Error - '" + spot.dx_grid + "' does not look like a valid Maidenhead grid."))
-                                      default=serialize_everything))
                 self.set_header("Cache-Control", "no-store")
                 self.set_header("Content-Type", "application/json")
                 return
@@ -127,9 +120,8 @@ class APISpotHandler(tornado.web.RequestHandler):
             if spot.sig and spot.sig_refs and len(spot.sig_refs) > 0 and spot.sig_refs[0].id and get_ref_regex_for_sig(
                     spot.sig) and not re.match(get_ref_regex_for_sig(spot.sig), spot.sig_refs[0].id):
                 self.set_status(422)
-                self.write(json.dumps(
+                self.write(safe_json_dumps(
-                    "Error - '" + spot.sig_refs[0].id + "' does not look like a valid reference for " + spot.sig + ".",
+                    "Error - '" + spot.sig_refs[0].id + "' does not look like a valid reference for " + spot.sig + "."))
-                    default=serialize_everything))
                 self.set_header("Cache-Control", "no-store")
                 self.set_header("Content-Type", "application/json")
                 return
@@ -139,14 +131,14 @@ class APISpotHandler(tornado.web.RequestHandler):
             spot.infer_missing()
             self._spots.add(spot.id, spot, expire=MAX_SPOT_AGE)
 
-            self.write(json.dumps("OK", default=serialize_everything))
+            self.write(safe_json_dumps("OK"))
             self.set_status(201)
             self.set_header("Cache-Control", "no-store")
             self.set_header("Content-Type", "application/json")
 
         except Exception as e:
             logging.error(e)
-            self.write(json.dumps("Error - an internal server error occurred.", default=serialize_everything))
+            self.write(safe_json_dumps("Error - an internal server error occurred."))
             self.set_status(500)
             self.set_header("Cache-Control", "no-store")
             self.set_header("Content-Type", "application/json")

server/handlers/api/alerts.py

@@ -1,5 +1,4 @@
 import copy
-import json
 import logging
 from datetime import datetime
 from queue import Queue
@@ -12,7 +11,7 @@ from tornado import httputil
 from tornado.web import Application
 
 from core.prometheus_metrics_handler import api_requests_counter
-from core.utils import serialize_everything, empty_queue
+from core.utils import safe_json_dumps, empty_queue
 from data.lookup_credentials import extract_credentials
 
 SSE_HANDLER_MAX_QUEUE_SIZE = 100
@@ -57,15 +56,15 @@ class APIAlertsHandler(tornado.web.RequestHandler):
             data = get_alert_list_with_filters(self._alerts, query_params)
             if credentials:
                 data = self._enrich(data, credentials)
-            self.write(json.dumps(data, default=serialize_everything))
+            self.write(safe_json_dumps(data))
             self.set_status(200)
         except ValueError as e:
             logging.error(e)
-            self.write(json.dumps("Bad request - " + str(e), default=serialize_everything))
+            self.write(safe_json_dumps("Bad request - " + str(e)))
             self.set_status(400)
         except Exception as e:
             logging.error(e)
-            self.write(json.dumps("Error - an internal server error occurred.", default=serialize_everything))
+            self.write(safe_json_dumps("Error - an internal server error occurred."))
             self.set_status(500)
         self.set_header("Cache-Control", "no-store")
         self.set_header("Content-Type", "application/json")
@@ -150,7 +149,7 @@ class APIAlertsStreamHandler(tornado_eventsource.handler.EventSourceHandler):
                             if self._credentials:
                                 alert = copy.deepcopy(alert)
                                 alert.infer_missing(self._credentials)
-                            self.write_message(msg=json.dumps(alert, default=serialize_everything))
+                            self.write_message(msg=safe_json_dumps(alert))
 
                 else:
                     # Send a keepalive comment if the queue was empty

server/handlers/api/lookups.py

@@ -1,4 +1,3 @@
-import json
 import logging
 import re
 from datetime import datetime
@@ -13,7 +12,7 @@ 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
+from core.utils import safe_json_dumps
 from data.lookup_credentials import extract_credentials
 from data.sig_ref import SIGRef
 from data.spot import Spot
@@ -65,19 +64,18 @@ class APILookupCallHandler(tornado.web.RequestHandler):
                         "longitude": fake_spot.dx_longitude,
                         "location_source": fake_spot.dx_location_source
                     }
-                    self.write(json.dumps(data, default=serialize_everything))
+                    self.write(safe_json_dumps(data))
 
                 else:
-                    self.write(json.dumps("Error - '" + call + "' does not look like a valid callsign.",
+                    self.write(safe_json_dumps("Error - '" + call + "' does not look like a valid callsign."))
-                                          default=serialize_everything))
                     self.set_status(422)
             else:
-                self.write(json.dumps("Error - call must be provided", default=serialize_everything))
+                self.write(safe_json_dumps("Error - call must be provided"))
                 self.set_status(422)
 
         except Exception as e:
             logging.error(e)
-            self.write(json.dumps("Error - an internal server error occurred.", default=serialize_everything))
+            self.write(safe_json_dumps("Error - an internal server error occurred."))
             self.set_status(500)
 
         self.set_header("Cache-Control", "no-store")
@@ -111,27 +109,25 @@ class APILookupSIGRefHandler(tornado.web.RequestHandler):
             if "sig" in query_params.keys() and "id" in query_params.keys():
                 sig = str(query_params.get("sig")).upper()
                 ref_id = str(query_params.get("id")).upper()
-                if sig in list(map(lambda p: p.name, SIGS)):
+                if sig in list(map(lambda p: p.name.upper(), SIGS)):
                     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=ref_id, sig=sig))
-                        self.write(json.dumps(data, default=serialize_everything))
+                        self.write(safe_json_dumps(data))
 
                     else:
-                        self.write(
+                        self.write(safe_json_dumps(
-                            json.dumps(
+                                "Error - '" + ref_id + "' does not look like a valid reference ID for " + sig + "."))
-                                "Error - '" + ref_id + "' does not look like a valid reference ID for " + sig + ".",
-                                default=serialize_everything))
                         self.set_status(422)
                 else:
-                    self.write(json.dumps("Error - sig '" + sig + "' is not known.", default=serialize_everything))
+                    self.write(safe_json_dumps("Error - sig '" + sig + "' is not known."))
                     self.set_status(422)
             else:
-                self.write(json.dumps("Error - sig and id must be provided", default=serialize_everything))
+                self.write(safe_json_dumps("Error - sig and id must be provided"))
                 self.set_status(422)
 
         except Exception as e:
             logging.error(e)
-            self.write(json.dumps("Error - an internal server error occurred.", default=serialize_everything))
+            self.write(safe_json_dumps("Error - an internal server error occurred."))
             self.set_status(500)
 
         self.set_header("Cache-Control", "no-store")
@@ -185,15 +181,15 @@ class APILookupGridHandler(tornado.web.RequestHandler):
                             "latitude": lat + lat_cell_size,
                             "longitude": lon + lon_cell_size,
                         }}
-                    self.write(json.dumps(response, default=serialize_everything))
+                    self.write(safe_json_dumps(response))
 
             else:
-                self.write(json.dumps("Error - grid must be provided", default=serialize_everything))
+                self.write(safe_json_dumps("Error - grid must be provided"))
                 self.set_status(422)
 
         except Exception as e:
             logging.error(e)
-            self.write(json.dumps("Error - an internal server error occurred.", default=serialize_everything))
+            self.write(safe_json_dumps("Error - an internal server error occurred."))
             self.set_status(500)
 
         self.set_header("Cache-Control", "no-store")

server/handlers/api/options.py

@@ -1,4 +1,3 @@
-import json
 from datetime import datetime
 from typing import Any
 
@@ -10,7 +9,7 @@ from tornado.web import Application
 from core.config import MAX_SPOT_AGE, ALLOW_SPOTTING
 from core.constants import BANDS, ALL_MODES, MODE_TYPES, SIGS, CONTINENTS, PROPAGATION_MODES
 from core.prometheus_metrics_handler import api_requests_counter
-from core.utils import serialize_everything
+from core.utils import safe_json_dumps
 
 
 class APIOptionsHandler(tornado.web.RequestHandler):
@@ -50,7 +49,7 @@ class APIOptionsHandler(tornado.web.RequestHandler):
         if ALLOW_SPOTTING:
             options["spot_sources"].append("API")
 
-        self.write(json.dumps(options, default=serialize_everything))
+        self.write(safe_json_dumps(options))
         self.set_status(200)
         self.set_header("Cache-Control", "no-store")
         self.set_header("Content-Type", "application/json")

server/handlers/api/spots.py

@@ -1,5 +1,4 @@
 import copy
-import json
 import logging
 from datetime import datetime, timedelta
 from queue import Queue
@@ -12,7 +11,7 @@ from tornado import httputil
 from tornado.web import Application
 
 from core.prometheus_metrics_handler import api_requests_counter
-from core.utils import serialize_everything, empty_queue
+from core.utils import safe_json_dumps, empty_queue
 from data.lookup_credentials import extract_credentials
 
 SSE_HANDLER_MAX_QUEUE_SIZE = 1000
@@ -57,15 +56,15 @@ class APISpotsHandler(tornado.web.RequestHandler):
             data = get_spot_list_with_filters(self._spots, query_params)
             if credentials:
                 data = self._enrich(data, credentials)
-            self.write(json.dumps(data, default=serialize_everything))
+            self.write(safe_json_dumps(data))
             self.set_status(200)
         except ValueError as e:
             logging.error(e)
-            self.write(json.dumps("Bad request - " + str(e), default=serialize_everything))
+            self.write(safe_json_dumps("Bad request - " + str(e)))
             self.set_status(400)
         except Exception as e:
             logging.error(e)
-            self.write(json.dumps("Error - an internal server error occurred.", default=serialize_everything))
+            self.write(safe_json_dumps("Error - an internal server error occurred."))
             self.set_status(500)
         self.set_header("Cache-Control", "no-store")
         self.set_header("Content-Type", "application/json")
@@ -152,7 +151,7 @@ class APISpotsStreamHandler(tornado_eventsource.handler.EventSourceHandler):
                             if self._credentials:
                                 spot = copy.deepcopy(spot)
                                 spot.infer_missing(self._credentials)
-                            self.write_message(msg=json.dumps(spot, default=serialize_everything))
+                            self.write_message(msg=safe_json_dumps(spot))
 
                 else:
                     # Send a keepalive comment if the queue was empty

server/handlers/api/status.py

@@ -1,4 +1,3 @@
-import json
 from datetime import datetime
 from typing import Any
 
@@ -8,7 +7,7 @@ from tornado import httputil
 from tornado.web import Application
 
 from core.prometheus_metrics_handler import api_requests_counter
-from core.utils import serialize_everything
+from core.utils import safe_json_dumps
 
 
 class APIStatusHandler(tornado.web.RequestHandler):
@@ -30,7 +29,7 @@ class APIStatusHandler(tornado.web.RequestHandler):
         self._web_server_metrics["status"] = "OK"
         api_requests_counter.inc()
 
-        self.write(json.dumps(self._status_data, default=serialize_everything))
+        self.write(safe_json_dumps(self._status_data))
         self.set_status(200)
         self.set_header("Cache-Control", "no-store")
         self.set_header("Content-Type", "application/json")

spotproviders/gma.py

@@ -14,9 +14,9 @@ class GMA(HTTPSpotProvider):
     """Spot provider for General Mountain Activity"""
 
     POLL_INTERVAL_SEC = 120
-    SPOTS_URL = "https://www.cqgma.org/api/spots/25/"
+    SPOTS_URL = "https://www.gma.rocks/api/spots/25/"
     # GMA spots don't contain the details of the programme they are for, we need a separate lookup for that
-    REF_INFO_URL_ROOT = "https://www.cqgma.org/api/ref/?"
+    REF_INFO_URL_ROOT = "https://www.gma.rocks/api/ref/?"
 
     def __init__(self, provider_config):
         # Ensure there is an API key in our config, and set up the query URL using it. If no key is provided,
@@ -37,19 +37,21 @@ class GMA(HTTPSpotProvider):
                 spot = Spot(source=self.name,
                             dx_call=source_spot["ACTIVATOR"].upper(),
                             de_call=source_spot["SPOTTER"].upper(),
-                            freq=float(source_spot["QRG"]) * 1000 if (source_spot["QRG"] != "") else None,
+                            # Seen GMA spots with no frequency or with "QRT" in this field
-                            # Seen GMA spots with no frequency
+                            freq=float(source_spot["QRG"]) * 1000 if (
-                            mode=source_spot["MODE"].upper() if "<>" not in source_spot["MODE"] else None,
+                                        source_spot["QRG"] != "" and source_spot["QRG"] != "QRT") else None,
                             # Filter out some weird mode strings
+                            mode=source_spot["MODE"].upper() if "<>" not in source_spot["MODE"] else None,
                             comment=source_spot["TEXT"],
                             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(),
+                            # Seen GMA spots with no (or empty) lat/lon
                             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)
+                                    source_spot["LON"] and source_spot["LON"] != "") else None,
+                            qrt=source_spot["QRG"] == "QRT")
 
                 # GMA doesn't give what programme (SIG) the reference is for until we separately look it up.
                 if "REF" in source_spot:
@@ -63,8 +65,10 @@ class GMA(HTTPSpotProvider):
                             # spots come through with reftype=POTA or reftype=WWFF. SOTA is harder to figure out because both SOTA
                             # and GMA summits come through with reftype=Summit, so we must check for the presence of a "sota" entry
                             # to determine if it's a SOTA summit.
-                            if spot.sig_refs and "reftype" in ref_info and ref_info["reftype"] not in ["POTA", "WWFF"] and (
+                            if spot.sig_refs and "reftype" in ref_info and ref_info["reftype"] not in ["POTA",
-                                    ref_info["reftype"] != "Summit" or "sota" not in ref_info or ref_info["sota"] == ""):
+                                                                                                       "WWFF"] and (
+                                    ref_info["reftype"] != "Summit" or "sota" not in ref_info or ref_info[
+                                "sota"] == ""):
                                 match ref_info["reftype"]:
                                     case "Summit":
                                         spot.sig_refs[0].sig = "GMA"

spotproviders/parksnpeaks.py

@@ -30,8 +30,8 @@ class ParksNPeaks(HTTPSpotProvider):
                             dx_call=source_spot["actCallsign"].upper(),
                             de_call=source_spot["actSpoter"].upper() if source_spot["actSpoter"] != "" else None,
                             # typo exists in API
-                            freq=float(source_spot["actFreq"].replace(",", "")) * 1000000 if (
+                            freq=float(source_spot["actFreq"].replace(",", "").replace("+-", "")
-                                    source_spot["actFreq"] != "") else None,
+                                       .replace("+/-", "").strip()) * 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"],

spotproviders/towers.py

@@ -6,7 +6,7 @@ from data.spot import Spot
 from spotproviders.http_spot_provider import HTTPSpotProvider
 
 
-class WWTOTA(HTTPSpotProvider):
+class Towers(HTTPSpotProvider):
     """Spot provider for Towers on the Air"""
 
     POLL_INTERVAL_SEC = 120

templates/about.html

@@ -101,9 +101,9 @@
         (MOTA), the Amateur Radio Lighthouse Socirty (ARLHS), International Lighthouse Lightship Weekend (ILLW), Silos
         on the Air (SIOTA), World Castles Award (WCA), New Zealand on the Air (ZLOTA), Keith Roget Memorial National
         Parks Award (KRMNPA), Wainwrights on the Air (WOTA), Beaches on the Air (BOTA), Lagos y Lagunas On the Air
-        (LLOTA), Towers on the Air (WWTOTA), Tiles on the Air, Worked All Britain (WAB), Worked All Ireland (WAI), and
+        (LLOTA), Towers on the Air (WWTOTA), Tiles on the Air, Worked All Britain (WAB), Worked All Ireland (WAI), el
-        Toilets on the Air (TOTA).</p>
+        Diploma Municipios de España (DME) and Toilets on the Air (TOTA).</p>
-    <p>As of the time of writing in November 2025, I think Spothole captures essentially all outdoor radio programmes
+    <p>As of the time of writing in June 2026, I think Spothole captures essentially all outdoor radio programmes
         that have a defined reference list, and almost certainly those that have a spotting/alerting API. If you know of
         one I've missed, please let me know!</p>
     <h4 class="mt-4">Why can I filter spots by both SIG and Source? Isn't that basically the same thing?</h4>

templates/add_spot.html

@@ -76,7 +76,7 @@
 
 </div>
 
-<script src="/js/add-spot.js?v=1782076701"></script>
+<script src="/js/add-spot.js?v=1783357126"></script>
 <script>$(document).ready(function () {
     $("#nav-link-add-spot").addClass("active");
 }); <!-- highlight active page in nav --></script>

templates/alerts.html

@@ -75,7 +75,7 @@
 
 </div>
 
-<script src="/js/alerts.js?v=1782076701"></script>
+<script src="/js/alerts.js?v=1783357126"></script>
 <script>$(document).ready(function () {
     $("#nav-link-alerts").addClass("active");
 }); <!-- highlight active page in nav --></script>

templates/bands.html

@@ -3,9 +3,7 @@
 
 <div class="mt-3">
     <div id="settingsButtonRow" class="row mb-3">
-        <div class="col-auto me-auto pt-3">
+        <div class="col-auto me-auto pt-3"></div>
-            {% module Template("widgets/refresh-timer.html", web_ui_options=web_ui_options) %}
-        </div>
         <div class="col-auto">
             <div class="d-inline-flex gap-1">
                 {% module Template("widgets/filters-display-data-buttons.html", web_ui_options=web_ui_options) %}
@@ -77,8 +75,8 @@
 <script>
     let spotProvidersEnabledByDefault = {% raw json_encode(web_ui_options["spot-providers-enabled-by-default"]) %};
 </script>
-<script src="/js/spotsbandsandmap.js?v=1782076701"></script>
+<script src="/js/spotsbandsandmap.js?v=1783357126"></script>
-<script src="/js/bands.js?v=1782076701"></script>
+<script src="/js/bands.js?v=1783357126"></script>
 <script>$(document).ready(function () {
     $("#nav-link-bands").addClass("active");
 }); <!-- highlight active page in nav --></script>

templates/base.html

@@ -1,6 +1,6 @@
 {% extends "skeleton.html" %}
 {% block head_extra %}
-<link rel="stylesheet" href="/css/style.css?v=1782076701" type="text/css">
+<link rel="stylesheet" href="/css/style.css?v=1783357126" type="text/css">
 <link href="/vendor/css/bootstrap-5.3.8.min.css" rel="stylesheet">
 <link href="/vendor/css/fontawesome-6.7.2.min.css" rel="stylesheet">
 <link href="/vendor/css/solid-6.7.2.min.css" rel="stylesheet">
@@ -10,10 +10,10 @@
 <script src="/vendor/js/bootstrap-5.3.8.bundle.min.js"></script>
 <script src="/vendor/js/tinycolor2-1.6.0.min.js"></script>
 
-<script src="/js/utils.js?v=1782076701"></script>
+<script src="/js/utils.js?v=1783357126"></script>
-<script src="/js/ui-ham.js?v=1782076701"></script>
+<script src="/js/ui-ham.js?v=1783357126"></script>
-<script src="/js/geo.js?v=1782076701"></script>
+<script src="/js/geo.js?v=1783357126"></script>
-<script src="/js/common.js?v=1782076701"></script>
+<script src="/js/common.js?v=1783357126"></script>
 {% end %}
 {% block body %}
 <div class="container">

templates/conditions.html

@@ -284,7 +284,7 @@
 </div>
 
 <script src="/vendor/js/chart-4.4.9.umd.min.js"></script>
-<script src="/js/conditions.js?v=1782076701"></script>
+<script src="/js/conditions.js?v=1783357126"></script>
 <script>$(document).ready(function () {
     $("#nav-link-conditions").addClass("active");
 }); <!-- highlight active page in nav --></script>

templates/map.html

@@ -95,8 +95,8 @@
 <script>
     let spotProvidersEnabledByDefault = {% raw json_encode(web_ui_options["spot-providers-enabled-by-default"]) %};
 </script>
-<script src="/js/spotsbandsandmap.js?v=1782076701"></script>
+<script src="/js/spotsbandsandmap.js?v=1783357125"></script>
-<script src="/js/map.js?v=1782076701"></script>
+<script src="/js/map.js?v=1783357125"></script>
 <script>$(document).ready(function () {
     $("#nav-link-map").addClass("active");
 }); <!-- highlight active page in nav --></script>

templates/spots.html

@@ -116,8 +116,8 @@
 <script>
     let spotProvidersEnabledByDefault = {% raw json_encode(web_ui_options["spot-providers-enabled-by-default"]) %};
 </script>
-<script src="/js/spotsbandsandmap.js?v=1782076701"></script>
+<script src="/js/spotsbandsandmap.js?v=1783357125"></script>
-<script src="/js/spots.js?v=1782076701"></script>
+<script src="/js/spots.js?v=1783357125"></script>
 <script>$(document).ready(function () {
     $("#nav-link-spots").addClass("active");
 }); <!-- highlight active page in nav --></script>

templates/status.html

@@ -59,7 +59,7 @@
     </div>
 </div>
 
-<script src="/js/status.js?v=1782076701"></script>
+<script src="/js/status.js?v=1783357126"></script>
 <script>
     $(document).ready(function () {
         $("#nav-link-status").addClass("active");

webassets/apidocs/openapi.yml

@@ -18,6 +18,11 @@ info:
     ### 1.4
     
     * Spots can now include a "propagation_mode" field, and the `/options` call enumerates the options that can have.
+    * Added support for the Diploma de Municipios Españoles (DME) SIG
+    * Renamed some SIGs to avoid confusion between Towers, Tiles and Toilets
+    * Added `comment_names` to SIGs in the `/options`, to reflect how they might be referred to in spot comments where
+      it differs from their `name`.
+    * Added `propagation_mode` field to spots
 
     ### 1.3
 
@@ -771,7 +776,7 @@ components:
         - ZLOTA
         - WOTA
         - LLOTA
-        - WWTOTA
+        - Towers
         - Tiles
         - Cluster
         - RBN
@@ -790,7 +795,7 @@ components:
         - HEMA
         - WCA
         - MOTA
-        - SIOTA
+        - SiOTA
         - ARLHS
         - ILLW
         - ZLOTA
@@ -799,11 +804,12 @@ components:
         - WOTA
         - BOTA
         - LLOTA
-        - WWTOTA
+        - Towers
         - Tiles
         - WAB
         - WAI
-        - TOTA
+        - DME
+        - Toilets
       example: POTA
 
     SIGNameIncludingNoSIG:
@@ -1373,6 +1379,16 @@ components:
           type: string
           description: The full name of the SIG
           example: Parks on the Air
+        comment_names:
+          type: array
+          description: >
+            Names by which this SIG may be referred to in cluster spot comments. Most SIGs have a
+            single entry matching their programme name (e.g. ["POTA"]), but some have none (where
+            the name is ambiguous with other SIGs, such as Tiles and Toilets on the Air) or multiple
+            entries (e.g. WWBOTA accepts both "WWBOTA" and "BOTA" since the latter is often used).
+          items:
+            type: string
+          example: [ "TOTA" ]
         ref_regex:
           type: string
           description: >

webassets/js/alerts.js

@@ -1,5 +1,7 @@
 // How often to query the server?
 const REFRESH_INTERVAL_SEC = 60 * 10;
+// Last time the alerts list was updated on display.
+let lastUpdateTime;
 
 // Storage for the alert data that the server gives us.
 let alerts = [];
@@ -309,6 +311,27 @@ function filtersUpdated() {
     saveSettings();
 }
 
+// Update the refresh timing display
+function updateRefreshDisplay() {
+    if (lastUpdateTime != null) {
+        let secSinceUpdate = moment.duration(moment().diff(lastUpdateTime)).asSeconds();
+        let count = REFRESH_INTERVAL_SEC;
+        let updatingString = "Updating..."
+        if (secSinceUpdate < REFRESH_INTERVAL_SEC) {
+            count = REFRESH_INTERVAL_SEC - secSinceUpdate;
+            let number;
+            if (count <= 60) {
+                number = count.toFixed(0);
+                updatingString = "<span class='nowrap'>Updating in " + number + " second" + (number !== "1" ? "s" : "") + ".</span>";
+            } else {
+                number = Math.round(count / 60.0).toFixed(0);
+                updatingString = "<span class='nowrap'>Updating in " + number + " minute" + (number !== "1" ? "s" : "") + ".</span>";
+            }
+        }
+        $("#timing-container").html("Last updated at " + lastUpdateTime.format('HH:mm') + " UTC. " + updatingString);
+    }
+}
+
 // Startup
 $(document).ready(function () {
     // Call loadOptions(), this will then trigger loading alerts and setting up timers.

webassets/js/bands.js

@@ -1,5 +1,9 @@
-// How often to query the server?
+// SSE connection for live spot updates
-const REFRESH_INTERVAL_SEC = 60;
+let evtSource;
+let restartSSEOnErrorTimeoutId;
+// Debounce timer so rapid SSE bursts only trigger one updateBands() call, as these could trigger a flash of the user
+// visible content
+let updateBandsDebounceId;
 
 // A couple of constants that must match what's in CSS. We need to know them before the content actually renders, so we
 // can't just ask the elements themselves for their dimensions.
@@ -12,19 +16,62 @@ BAND_COLUMN_SPOT_DIV_HEIGHT_PX = BAND_COLUMN_FONT_SIZE * 1.6;
 
 // Load spots and populate the bands display.
 function loadSpots() {
-    $.getJSON('/api/v1/spots' + buildQueryString(false), function (jsonData) {
+    // Close any existing SSE connection before fetching fresh data
-        // Store last updated time
+    if (evtSource != null) {
-        lastUpdateTime = moment.utc();
+        evtSource.close();
-        updateRefreshDisplay();
+    }
+    $.getJSON('/api/v1/spots' + buildQueryString(), function (jsonData) {
         // Store data
         spots = jsonData;
         // Update bands display
         updateBands();
+        // Start the ongoing SSE connection
+        startSSEConnection();
     });
 }
 
-// Build a query string for the API, based on the filters that the user has selected.
+// Start an SSE connection to receive new spots as they arrive.
-function buildQueryString(includeCredentials) {
+function startSSEConnection() {
+    if (evtSource != null) {
+        evtSource.close();
+    }
+    evtSource = new EventSource('/api/v1/spots/stream' + buildQueryString());
+
+    evtSource.onmessage = function (event) {
+        const newSpot = JSON.parse(event.data);
+
+        // Replace any existing spot for this callsign
+        spots = spots.filter(s => newSpot["dx_call"] !== s["dx_call"]);
+        spots.unshift(newSpot);
+
+        // Debounce. Wait 500ms after the last message before re-rendering to avoid too many ugly flashes
+        clearTimeout(updateBandsDebounceId);
+        updateBandsDebounceId = setTimeout(updateBands, 5000);
+    };
+
+    evtSource.onerror = function () {
+        if (evtSource != null) {
+            evtSource.close();
+        }
+        clearTimeout(restartSSEOnErrorTimeoutId);
+        restartSSEOnErrorTimeoutId = setTimeout(startSSEConnection, 1000);
+    };
+}
+
+// Remove spots from the display that are older than the selected max age.
+function expireOldSpots() {
+    const maxAgeSeconds = parseInt($("#max-spot-age option:selected").val());
+    const cutoff = (Date.now() / 1000) - maxAgeSeconds;
+    const before = spots.length;
+    spots = spots.filter(s => s["time"] && s["time"] >= cutoff);
+    if (spots.length !== before) {
+        updateBands();
+    }
+}
+
+// Build a query string for the API, based on the filters that the user has selected. There's no need for credentials
+// in the bands page's version of this, because nothing QRZ.com/HamQTH can provide will affect the display.
+function buildQueryString() {
     let str = "?";
     ["dx_continent", "de_continent", "mode", "source", "band", "sig"].forEach(fn => {
         if (!allFilterOptionsSelected(fn)) {
@@ -34,9 +81,6 @@ function buildQueryString(includeCredentials) {
     str = str + "max_age=" + $("#max-spot-age option:selected").val();
     // Additional filters for the bands view: No dupes, no QRT
     str = str + "&dedupe=true&allow_qrt=false";
-    if (includeCredentials) {
-        str = str + getCredentialQueryString();
-    }
     return str;
 }
 
@@ -257,22 +301,28 @@ function loadOptions() {
         // Load settings from settings storage now all the controls are available
         loadSettings();
 
-        // Load spots and set up the timer
+        // Load spots and start SSE for live updates
         loadSpots();
-        setInterval(loadSpots, REFRESH_INTERVAL_SEC * 1000);
+        // Set up spot expiry checker
+        setInterval(expireOldSpots, 60 * 1000);
     });
 }
 
-// Method called when any display property is changed to reload the map and persist the display settings.
+// Method called when any display property is changed to reload the bands display and persist settings.
 function displayUpdated() {
-    updateMap();
+    updateBands();
     saveSettings();
 }
 
 // Startup
 $(document).ready(function () {
+    // Close SSE connection cleanly when navigating away
+    window.addEventListener('beforeunload', function () {
+        if (evtSource != null) {
+            evtSource.close();
+        }
+    });
+
     // Call loadOptions(), this will then trigger loading spots and setting up timers.
     loadOptions();
-    // Update the refresh timing display every second
-    setInterval(updateRefreshDisplay, 1000);
 });

webassets/js/common.js

@@ -1,7 +1,5 @@
 // Storage for the options that the server gives us. This will define our filters.
 let options = {};
-// Last time we updated the spots/alerts list on display.
-let lastUpdateTime;
 // Normally load user settings from local storage, unless embedded mode is in use
 let useLocalStorage = true;
 
@@ -145,27 +143,6 @@ function toggleFilterButtons(filterQuery, state) {
     filtersUpdated();
 }
 
-// Update the refresh timing display
-function updateRefreshDisplay() {
-    if (lastUpdateTime != null) {
-        let secSinceUpdate = moment.duration(moment().diff(lastUpdateTime)).asSeconds();
-        let count = REFRESH_INTERVAL_SEC;
-        let updatingString = "Updating..."
-        if (secSinceUpdate < REFRESH_INTERVAL_SEC) {
-            count = REFRESH_INTERVAL_SEC - secSinceUpdate;
-            let number;
-            if (count <= 60) {
-                number = count.toFixed(0);
-                updatingString = "<span class='nowrap'>Updating in " + number + " second" + (number !== "1" ? "s" : "") + ".</span>";
-            } else {
-                number = Math.round(count / 60.0).toFixed(0);
-                updatingString = "<span class='nowrap'>Updating in " + number + " minute" + (number !== "1" ? "s" : "") + ".</span>";
-            }
-        }
-        $("#timing-container").html("Last updated at " + lastUpdateTime.format('HH:mm') + " UTC. " + updatingString);
-    }
-}
-
 // When the "use local time" field is changed, reload the table and save settings
 function timeZoneUpdated() {
     updateTable();

webassets/js/map.js

@@ -1,6 +1,3 @@
-// How often to query the server?
-const REFRESH_INTERVAL_SEC = 60;
-
 // Colours
 const MAIDENHEAD_GRID_COLOR_LIGHT = 'rgba(200, 140, 140, 1.0)';
 const CQ_ZONES_COLOR_LIGHT = 'rgba(140, 200, 140, 1.0)';
@@ -11,6 +8,15 @@ const CQ_ZONES_COLOR_DARK = 'rgba(60, 120, 60, 1.0)';
 const ITU_ZONES_COLOR_DARK = 'rgba(120, 120, 60, 1.0)';
 const WAB_WAI_GRID_COLOR_DARK = 'rgba(60, 60, 120, 1.0)';
 
+// SSE connection for live spot updates
+let evtSource;
+let restartSSEOnErrorTimeoutId;
+// Map dx_call to a pair of marker & geodesic line, so we can de-duplicate spots as they arrive and only show
+// one marker per dx_call. The key here is actually dx_call + SSID if the spot gives us an SSID; this is mostly for
+// if APRS spots are enabled so we can ID a home and mobile station separately rather than our marker oscillating
+// between the two as updates come in.
+let spotMarkers = new Map();
+
 // Map layers
 let backgroundTileLayer;
 let markersLayer;
@@ -28,7 +34,13 @@ let firstLoad = true;
 
 // Load spots and populate the map.
 function loadSpots() {
-    $.getJSON('/api/v1/spots' + buildQueryString(true), function (jsonData) {
+    // Close any existing SSE connection before fetching fresh data
+    if (evtSource != null) {
+        evtSource.close();
+    }
+    // On first fetch, don't include QRZ/HamQTH credentials. This will cause some inaccurate
+    // marker positions but avoids having to wait a minute or more for all the lookups to fire.
+    $.getJSON('/api/v1/spots' + buildQueryString(false), function (jsonData) {
         // Store data
         spots = jsonData;
         // Update map
@@ -36,9 +48,102 @@ function loadSpots() {
         if ($("#showTerminator")[0].checked) {
             terminator.setTime();
         }
+        // Start the ongoing SSE connection
+        startSSEConnection();
     });
 }
 
+// Start the SSE connection to receive new spots as they arrive
+function startSSEConnection() {
+    if (evtSource != null) {
+        evtSource.close();
+    }
+    // SSE is going to fetch only a few spots at a time, so now we include QRZ/HamQTH credentials because the delay won't be significant.
+    evtSource = new EventSource('/api/v1/spots/stream' + buildQueryString(true));
+
+    evtSource.onmessage = function (event) {
+        const newSpot = JSON.parse(event.data);
+        const key = spotKey(newSpot);
+
+        // Remove existing marker/geodesic for this callsign if present
+        removeSpotFromMap(key);
+        spots = spots.filter(s => spotKey(s) !== key);
+
+        // Skip spots with no map coordinates
+        if (newSpot["dx_latitude"] == null || newSpot["dx_longitude"] == null) {
+            return;
+        }
+
+        // Add to data store and map
+        spots.unshift(newSpot);
+        addSpotToMap(newSpot);
+    };
+
+    evtSource.onerror = function () {
+        if (evtSource != null) {
+            evtSource.close();
+        }
+        clearTimeout(restartSSEOnErrorTimeoutId);
+        restartSSEOnErrorTimeoutId = setTimeout(startSSEConnection, 1000);
+    };
+}
+
+// Remove spots from the map that are older than the selected max age.
+function expireOldSpots() {
+    const maxAgeSeconds = parseInt($("#max-spot-age option:selected").val());
+    const cutoff = (Date.now() / 1000) - maxAgeSeconds;
+    spots = spots.filter(function (s) {
+        if (s["time"] && s["time"] < cutoff) {
+            removeSpotFromMap(spotKey(s));
+            return false;
+        }
+        return true;
+    });
+}
+
+// Returns a unique key for a spot based on its callsign and SSID. This is in case the APRS spot source is enabled and
+// we want to display all SSIDs for a given callsign, not just the latest one.
+function spotKey(s) {
+    return s["dx_call"] + (s["dx_ssid"] ? "-" + s["dx_ssid"] : "");
+}
+
+// Add a single spot's marker and geodesic to the map and to spotMarkers
+function addSpotToMap(s) {
+    const m = L.marker([s["dx_latitude"], s["dx_longitude"]], {icon: getIcon(s)});
+    m.bindPopup(getTooltipText(s));
+    markersLayer.addLayer(m);
+    oms.addMarker(m);
+
+    let geodesic = null;
+    if ($("#mapShowGeodesics")[0].checked && s["de_latitude"] != null && s["de_longitude"] != null) {
+        try {
+            geodesic = L.geodesic([[s["de_latitude"], s["de_longitude"]], m.getLatLng()], {
+                color: bandToColor(s['band']),
+                wrap: false,
+                steps: 5
+            });
+            geodesicsLayer.addLayer(geodesic);
+        } catch (e) {
+            // Not sure what causes these but better to continue than to crash out
+        }
+    }
+
+    spotMarkers.set(spotKey(s), {marker: m, geodesic: geodesic});
+}
+
+// Remove a spot's marker and geodesic from the map and from spotMarkers.
+function removeSpotFromMap(key) {
+    const entry = spotMarkers.get(key);
+    if (entry) {
+        markersLayer.removeLayer(entry.marker);
+        oms.removeMarker(entry.marker);
+        if (entry.geodesic) {
+            geodesicsLayer.removeLayer(entry.geodesic);
+        }
+        spotMarkers.delete(key);
+    }
+}
+
 // Build a query string for the API, based on the filters that the user has selected.
 function buildQueryString(includeCredentials) {
     let str = "?";
@@ -62,27 +167,14 @@ function updateMap() {
     markersLayer.clearLayers();
     geodesicsLayer.clearLayers();
     oms.clearMarkers();
+    spotMarkers.clear();
 
-    // Make new markers for all spots that match the filter
+    // Make new markers for all spots
     spots.forEach(function (s) {
-        const m = L.marker([s["dx_latitude"], s["dx_longitude"]], {icon: getIcon(s)});
+        if (s["dx_latitude"] == null || s["dx_longitude"] == null) {
-        m.bindPopup(getTooltipText(s));
+            return;
-        markersLayer.addLayer(m);
-        oms.addMarker(m);
-
-        // Create geodesics if required
-        if ($("#mapShowGeodesics")[0].checked && s["de_latitude"] != null && s["de_longitude"] != null) {
-            try {
-                const geodesic = L.geodesic([[s["de_latitude"], s["de_longitude"]], m.getLatLng()], {
-                    color: bandToColor(s['band']),
-                    wrap: false,
-                    steps: 5
-                });
-                geodesicsLayer.addLayer(geodesic);
-            } catch (e) {
-                // Not sure what causes these but better to continue than to crash out
-            }
         }
+        addSpotToMap(s);
     });
 
     // On first load, zoom to the extent of the markers
@@ -239,9 +331,10 @@ function loadOptions() {
         enableITUZones($("#showITUZones")[0].checked);
         enableWABWAIGrid($("#showWABWAIGrid")[0].checked);
 
-        // Load spots and set up the timer
+        // Load spots and start SSE for live updates
         loadSpots();
-        setInterval(loadSpots, REFRESH_INTERVAL_SEC * 1000);
+        // Set up spot expiry checker
+        setInterval(expireOldSpots, 60 * 1000);
     });
 }
 
@@ -483,6 +576,13 @@ function setUpMap() {
 
 // Startup
 $(document).ready(function () {
+    // Close SSE connection cleanly when navigating away
+    window.addEventListener('beforeunload', function () {
+        if (evtSource != null) {
+            evtSource.close();
+        }
+    });
+
     // Hide the extra things that need to be hidden on this page
     $(".hideonmap").hide();
     // Set up map

webassets/js/ui-ham.js

@@ -332,12 +332,12 @@ const SIG_ICONS = {
     "BOTA": "fa-umbrella-beach",
     "KRMNPA": "fa-earth-oceania",
     "LLOTA": "fa-water",
-    "WWTOTA": "fa-tower-observation",
+    "Towers": "fa-tower-observation",
     "WAB": "fa-table-cells-large",
     "WAI": "fa-table-cells-large",
     "DME": "fa-building",
     "Tiles": "fa-square",
-    "TOTA": "fa-toilet"
+    "Toilets": "fa-toilet"
 }
 
 // Get the Font Awesome icon for a given SIG. If the SIG is unknown, the provided default symbol will be returned