Send GPS Beacon from webchat interface

This patchset allow getting the GPS coordinates from the browser's
geolocation API (which can be denied by user), then send's the GPS
coordinates to aprsd via socketio and then aprsd sends a beacon.

This allows the APRS network to know the location of the person running
the webchat app via browser so packets can get routed back to it.

aprsd/clients/kiss.py

@@ -91,21 +91,29 @@ class KISS3Client:
         #     payload
         # )).encode('US-ASCII'),
         # payload = str(msg).encode('US-ASCII')
+        payload = None
+        path = ["WIDE1-1", "WIDE2-1"]
         if isinstance(msg, messaging.AckMessage):
             msg_payload = f"ack{msg.id}"
+        elif isinstance(msg, messaging.RawMessage):
+            payload = msg.message.encode("US-ASCII")
+            path = ["WIDE2-1"]
         else:
             msg_payload = f"{msg.message}{{{str(msg.id)}"
-        payload = (
-            ":{:<9}:{}".format(
-                msg.tocall,
-                msg_payload,
-            )
-        ).encode("US-ASCII")
+
+        if not payload:
+            payload = (
+                ":{:<9}:{}".format(
+                    msg.tocall,
+                    msg_payload,
+                )
+            ).encode("US-ASCII")
+
         LOG.debug(f"Send '{payload}' TO KISS")
         frame = Frame.ui(
             destination=msg.tocall,
             source=msg.fromcall,
-            path=["WIDE1-1", "WIDE2-1"],
+            path=path,
             info=payload,
         )
         self.kiss.write(frame)

aprsd/cmds/webchat.py

@@ -9,6 +9,7 @@ import threading
 import time
 
 import aprslib
+from aprslib import util as aprslib_util
 import click
 import flask
 from flask import request
@@ -433,6 +434,32 @@ class SendMessageNamespace(Namespace):
         msg.send()
         # self._msg_queues["tx"].put(msg)
 
+    def on_gps(self, data):
+        LOG.debug(f"WS on_GPS: {data}")
+        lat = aprslib_util.latitude_to_ddm(data["latitude"])
+        long = aprslib_util.longitude_to_ddm(data["longitude"])
+        LOG.debug(f"Lat DDM {lat}")
+        LOG.debug(f"Long DDM {long}")
+
+        local_datetime = datetime.datetime.now()
+        utc_offset_timedelta = datetime.datetime.utcnow() - local_datetime
+        result_utc_datetime = local_datetime + utc_offset_timedelta
+        time_zulu = result_utc_datetime.strftime("%d%H%M")
+
+        # now construct a beacon to send over the client connection
+        txt = (
+            f"{self._config['aprs']['login']}>APZ100,WIDE2-1"
+            f":!{lat}{long}#PHG7260 APRSD WebChat Beacon"
+        )
+
+        txt = f"@{time_zulu}z{lat}1{long}$APRSD WebChat Beacon"
+
+        LOG.debug(f"Sending {txt}")
+        beacon_msg = messaging.RawMessage(txt)
+        beacon_msg.fromcall = self._config["aprs"]["login"]
+        beacon_msg.tocall = "APDW16"
+        beacon_msg.send_direct()
+
     def handle_message(self, data):
         LOG.debug(f"WS Data {data}")
 

aprsd/web/chat/static/js/send-message.js

@@ -1,11 +1,11 @@
 var cleared = false;
 var callsign_list = {};
 var message_list = {};
+const socket = io("/sendmsg");
 
 function size_dict(d){c=0; for (i in d) ++c; return c}
 
 function init_chat() {
-   const socket = io("/sendmsg");
    socket.on('connect', function () {
        console.log("Connected to socketio");
    });
@@ -44,6 +44,54 @@ function init_chat() {
        socket.emit("send", msg);
        $('#message').val('');
    });
+
+   $("#send_beacon").click(function() {
+       console.log("Send a beacon!")
+       getLocation();
+   });
+}
+
+function getLocation() {
+    if (navigator.geolocation) {
+        console.log("getCurrentPosition");
+        navigator.geolocation.getCurrentPosition(showPosition, showError);
+    } else {
+        var msg = "Geolocation is not supported by this browser."
+        console.log(msg);
+        alert(msg)
+    }
+}
+
+function showError(error) {
+    console.log("showError");
+    console.log(error);
+    var msg = "";
+      switch(error.code) {
+        case error.PERMISSION_DENIED:
+          msg = "User denied the request for Geolocation."
+          break;
+        case error.POSITION_UNAVAILABLE:
+          msg = "Location information is unavailable."
+          break;
+        case error.TIMEOUT:
+          msg = "The request to get user location timed out."
+          break;
+        case error.UNKNOWN_ERROR:
+          msg = "An unknown error occurred."
+          break;
+      }
+      console.log(msg);
+      alert(msg);
+}
+
+function showPosition(position) {
+  console.log("showPosition Called");
+  msg = {
+      'latitude': position.coords.latitude,
+      'longitude': position.coords.longitude
+  }
+  console.log(msg);
+  socket.emit("gps", msg);
 }
 
 

aprsd/web/chat/templates/index.html

@@ -63,6 +63,7 @@
                         <input type="text" name="message" id="message" size="40" maxlength="40">
                     </div>
                     <input type="submit" name="submit" class="ui button" id="send_msg" value="Send" />
+                    <button type="button" class="ui button" id="send_beacon" value="Send GPS Beacon">Send GPS Beacon</button>
                 </form>
             </div>
             </div>

docker/Dockerfile

@@ -16,7 +16,7 @@ ENV LANG=C.UTF-8
 
 ENV DEBIAN_FRONTEND=noninteractive
 RUN apt update
-RUN apt install -y git build-essential rustc cargo
+RUN apt install -y git build-essential
 RUN apt install -y libffi-dev python3-dev libssl-dev libxml2-dev libxslt-dev
 RUN apt install -y python3 python3-pip python3-dev python3-lxml