Starting to implement alerts #17

spotproviders/aprsis.py

@@ -0,0 +1,58 @@
+import logging
+from datetime import datetime, timezone
+from threading import Thread
+
+import aprslib
+import pytz
+
+from core.config import SERVER_OWNER_CALLSIGN
+from data.spot import Spot
+from spotproviders.spot_provider import SpotProvider
+
+
+# Spot provider for the APRS-IS.
+class APRSIS(SpotProvider):
+
+    def __init__(self, provider_config):
+        super().__init__(provider_config)
+        self.thread = Thread(target=self.connect)
+        self.thread.daemon = True
+        self.aprsis = None
+
+    def start(self):
+        self.thread.start()
+
+    def connect(self):
+        self.aprsis = aprslib.IS(SERVER_OWNER_CALLSIGN)
+        self.status = "Connecting"
+        logging.info("APRS-IS connecting...")
+        self.aprsis.connect()
+        self.aprsis.consumer(self.handle)
+        logging.info("APRS-IS connected.")
+
+    def stop(self):
+        self.status = "Shutting down"
+        self.aprsis.close()
+        self.thread.join()
+
+    def handle(self, data):
+        # Split SSID in "from" call and store separately
+        from_parts = data["from"].split("-")
+        dx_call = from_parts[0]
+        dx_aprs_ssid = from_parts[1] if len(from_parts) > 1 else None
+        spot = Spot(source="APRS-IS",
+                    dx_call=dx_call,
+                    dx_aprs_ssid=dx_aprs_ssid,
+                    de_call=data["via"],
+                    comment=data["comment"] if "comment" in data else None,
+                    latitude=data["latitude"] if "latitude" in data else None,
+                    longitude=data["longitude"] if "longitude" in data else None,
+                    icon="tower-cell",
+                    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.status = "OK"
+        self.last_update_time = datetime.now(timezone.utc)
+        logging.debug("Data received from APRS-IS.")