Add ability to add tracked stations via a message to TACTICAL

As per:
http://xastir.org/index.php/Search_and_Rescue_(SAR)#Tactical_Callsigns,
also compatible with APRSISCE/32

src/StatusScreen.vue

@@ -10,7 +10,7 @@
       </tr>
 
       <StationRow
-        v-for="(tactical, callsign) in config.trackedStations"
+        v-for="(tactical, callsign) in trackedStations"
         :key="callsign"
         :callsign="callsign"
         :tactical="tactical"
@@ -34,12 +34,12 @@ export default {
   components: { StationRow },
   data() {
     return {
-      config: config,
       aprsStream: null,
       parser: new aprs.APRSParser(),
       messages: [],
       messagesFromStation: {},
-      now: new Date()
+      now: new Date(),
+      trackedStations: config.trackedStations
     };
   },
 
@@ -86,6 +86,20 @@ export default {
       } else {
         this.$set(this.messagesFromStation, callsign, [message]);
       }
+
+      // message to TACTICAL setting a tactical nickname from an
+      // authorized call, so add/update it in trackedStations
+      if (
+        message.data &&
+        message.data.addressee &&
+        message.data.addressee.call === "TACTICAL" &&
+        config.TACTICAL_whitelist.includes(message.from.toString())
+      ) {
+        message.data.text.split(";").map(tac_assoc => {
+          let [call, tac] = tac_assoc.split("=", 2);
+          this.trackedStations[call] = tac;
+        });
+      }
     }
   }
 };

src/status_config.yaml

@@ -1,6 +1,10 @@
 timeoutLength: 600000 # 10 * 60 * 1000 = 10 minutes
 lowVoltage: 11.9
 
+TACTICAL_whitelist:
+  - KC1GDW-7
+  - W1FN
+
 trackedStations:
   # Digis/iGates
   W1FN-1: