display locations parsed from ysf on map

htdocs/map.js

@@ -12,6 +12,33 @@
         ws.send("SERVER DE CLIENT client=map.js type=map");
     };
 
+    var map;
+    var markers = {};
+    var updateQueue = [];
+
+    var processUpdates = function(updates) {
+        if (!map) {
+            updateQueue = updateQueue.concat(updates);
+            return;
+        }
+        updates.forEach(function(update){
+            // TODO maidenhead locator implementation
+            if (update.location.type != 'latlon') return;
+            var pos = new google.maps.LatLng(update.location.lat, update.location.lon)
+            if (markers[update.callsign]) {
+                console.info("updating");
+                markers[update.callsign].setPosition(pos);
+            } else {
+                console.info("initializing");
+                markers[update.callsign] = new google.maps.Marker({
+                    position: pos,
+                    map: map,
+                    title: update.callsign
+                });
+            }
+        });
+    }
+
     ws.onmessage = function(e){
         if (typeof e.data != 'string') {
             console.error("unsupported binary data on websocket; ignoring");
@@ -27,15 +54,19 @@
                 case "config":
                     var config = json.value;
                     $.getScript("https://maps.googleapis.com/maps/api/js?key=" + config.google_maps_api_key).done(function(){
-                        var map = new google.maps.Map($('body')[0], {
+                        map = new google.maps.Map($('body')[0], {
                             center: {
                                 lat: config.receiver_gps[0],
                                 lng: config.receiver_gps[1]
                             },
                             zoom: 8
                         });
+                        processUpdates(updateQueue);
                     })
                 break
+                case "update":
+                    processUpdates(json.value);
+                break
             }
         } catch (e) {
             // don't lose exception

owrx/connection.py

@@ -3,10 +3,12 @@ from owrx.source import DspManager, CpuUsageThread, SdrService, ClientRegistry
 from owrx.feature import FeatureDetector
 from owrx.version import openwebrx_version
 import json
+from owrx.map import Map
 
 import logging
 logger = logging.getLogger(__name__)
 
+
 class Client(object):
     def __init__(self, conn):
         self.conn = conn
@@ -165,9 +167,17 @@ class MapConnection(Client):
         pm = PropertyManager.getSharedInstance()
         self.write_config(pm.collect("google_maps_api_key", "receiver_gps").__dict__())
 
+        Map.getSharedInstance().addClient(self)
+
+    def close(self):
+        Map.getSharedInstance().removeClient(self)
+        super().close()
+
     def write_config(self, cfg):
         self.protected_send({"type":"config","value":cfg})
 
+    def write_update(self, update):
+        self.protected_send({"type":"update","value":update})
 
 class WebSocketMessageHandler(object):
     def __init__(self):

owrx/map.py

@@ -0,0 +1,62 @@
+from datetime import datetime
+
+
+class Location(object):
+    def __dict__(self):
+        return {}
+
+
+class Map(object):
+    sharedInstance = None
+    @staticmethod
+    def getSharedInstance():
+        if Map.sharedInstance is None:
+            Map.sharedInstance = Map()
+        return Map.sharedInstance
+
+    def __init__(self):
+        self.clients = []
+        self.positions = {}
+        super().__init__()
+
+    def broadcast(self, update):
+        for c in self.clients:
+            c.write_update(update)
+
+    def addClient(self, client):
+        self.clients.append(client)
+        client.write_update([{"callsign": callsign, "location": record["loc"].__dict__()} for (callsign, record) in self.positions.items()])
+
+    def removeClient(self, client):
+        try:
+            self.clients.remove(client)
+        except ValueError:
+            pass
+
+    def updateLocation(self, callsign, loc: Location):
+        self.positions[callsign] = {"loc": loc, "updated": datetime.now()}
+        self.broadcast([{"callsign": callsign, "location": loc.__dict__()}])
+
+
+class LatLngLocation(Location):
+    def __init__(self, lat: float, lon: float):
+        self.lat = lat
+        self.lon = lon
+
+    def __dict__(self):
+        return {
+            "type":"latlon",
+            "lat":self.lat,
+            "lon":self.lon
+        }
+
+
+class LocatorLocation(Location):
+    def __init__(self, locator: str):
+        self.locator = locator
+
+    def __dict__(self):
+        return {
+            "type":"locator",
+            "locator":self.locator
+        }

owrx/meta.py

@@ -4,6 +4,7 @@ import json
 from datetime import datetime, timedelta
 import logging
 import threading
+from owrx.map import Map, LatLngLocation
 
 logger = logging.getLogger(__name__)
 
@@ -14,18 +15,22 @@ class DmrCache(object):
         if DmrCache.sharedInstance is None:
             DmrCache.sharedInstance = DmrCache()
         return DmrCache.sharedInstance
+
     def __init__(self):
         self.cache = {}
         self.cacheTimeout = timedelta(seconds = 86400)
+
     def isValid(self, key):
         if not key in self.cache: return False
         entry = self.cache[key]
         return entry["timestamp"] + self.cacheTimeout > datetime.now()
+
     def put(self, key, value):
         self.cache[key] = {
             "timestamp": datetime.now(),
             "data": value
         }
+
     def get(self, key):
         if not self.isValid(key): return None
         return self.cache[key]["data"]
@@ -34,6 +39,7 @@ class DmrCache(object):
 class DmrMetaEnricher(object):
     def __init__(self):
         self.threads = {}
+
     def downloadRadioIdData(self, id):
         cache = DmrCache.getSharedInstance()
         try:
@@ -44,6 +50,7 @@ class DmrMetaEnricher(object):
         except json.JSONDecodeError:
             cache.put(id, None)
         del self.threads[id]
+
     def enrich(self, meta):
         if not PropertyManager.getSharedInstance()["digital_voice_dmr_id_lookup"]: return None
         if not "source" in meta: return None
@@ -60,9 +67,18 @@ class DmrMetaEnricher(object):
         return None
 
 
+class YsfMetaEnricher(object):
+    def enrich(self, meta):
+        if "source" in meta and "lat" in meta and "lon" in meta:
+            # TODO parsing the float values should probably happen earlier
+            Map.getSharedInstance().updateLocation(meta["source"], LatLngLocation(float(meta["lat"]), float(meta["lon"])))
+        return None
+
+
 class MetaParser(object):
     enrichers = {
-        "DMR": DmrMetaEnricher()
+        "DMR": DmrMetaEnricher(),
+        "YSF": YsfMetaEnricher()
     }
 
     def __init__(self, handler):