Get ZLOTA spots from its own API rather than PnP. Closes #37

spotproviders/zlota.py

@@ -0,0 +1,59 @@
+import csv
+import logging
+import re
+from datetime import datetime, timedelta
+
+import pytz
+from requests_cache import CachedSession
+
+from core.constants import HTTP_HEADERS
+from core.sig_utils import get_icon_for_sig
+from data.spot import Spot
+from spotproviders.http_spot_provider import HTTPSpotProvider
+
+
+# Spot provider for ZLOTA
+class ZLOTA(HTTPSpotProvider):
+    POLL_INTERVAL_SEC = 120
+    SPOTS_URL = "https://ontheair.nz/api/spots?zlota_only=true"
+    LIST_URL = "https://ontheair.nz/assets/assets.json"
+    LIST_CACHE_TIME_DAYS = 30
+    LIST_CACHE = CachedSession("cache/zlota_data_cache", expire_after=timedelta(days=LIST_CACHE_TIME_DAYS))
+
+    def __init__(self, provider_config):
+        super().__init__(provider_config, self.SPOTS_URL, self.POLL_INTERVAL_SEC)
+
+    def http_response_to_spots(self, http_response):
+        new_spots = []
+        # Iterate through source data
+        for source_spot in http_response.json():
+            # Frequency is often inconsistent as to whether it's in Hz or kHz. Make a guess.
+            freq_hz = float(source_spot["frequency"])
+            if freq_hz < 1000000:
+                freq_hz = freq_hz * 1000
+
+            # Convert to our spot format
+            spot = Spot(source=self.name,
+                        source_id=source_spot["id"],
+                        dx_call=source_spot["activator"].upper(),
+                        de_call=source_spot["spotter"].upper(),
+                        freq=freq_hz,
+                        mode=source_spot["mode"].upper().strip(),
+                        comment=source_spot["comments"],
+                        sig="ZLOTA",
+                        sig_refs=[source_spot["reference"]],
+                        sig_refs_names=[source_spot["name"]],
+                        icon=get_icon_for_sig("ZLOTA"),
+                        time=datetime.fromisoformat(source_spot["referenced_time"]).astimezone(pytz.UTC).timestamp())
+
+            # ZLOTA name/lat/lon lookup
+            zlota_data = self.LIST_CACHE.get(self.LIST_URL, headers=HTTP_HEADERS).json()
+            for asset in zlota_data:
+                if asset["code"] == spot.sig_refs[0]:
+                    spot.sig_refs_names = [asset["name"]]
+                    spot.dx_latitude = asset["y"]
+                    spot.dx_longitude = asset["x"]
+                    break
+
+            new_spots.append(spot)
+        return new_spots