Weiterarbeit am Tracker

tracker.py

@@ -17,6 +17,7 @@ import os
 import time
 import paho.mqtt.client as mqtt
 import json
+import socket
 
 class Tracker():
 
@@ -26,6 +27,9 @@ class Tracker():
         if trackertype not in validtypes:
             raise TypeError(f"Invalid tracker type: '{valtype}'. Only supported: {validtypes}")
         self.ttype = trackertype
+
+        self.appdata = None
+
         self.activated = False
         self.trace = False   # Debugging
         self.trace_fh = None # File Handle der Tracedatei
@@ -38,6 +42,22 @@ class Tracker():
         self.tspos = None  # timestamp (hh:ss:mm) as datetime.time
         self.sog = None
 
+        self.hero_orgstatus = None
+        self.hero_racestatus = None # Akluelle Regatta
+
+    def is_server_active(self, hostname, port):
+        """
+        ohne Netzwerkverbindung wirft socket.gethostbyname eine Exception,
+        ggf. "Erro -3 temporary failure in name resolution"
+        """
+        try:
+            host = socket.gethostbyname(hostname) # DNS Lookup
+            s = socket.create_connection((host, port), 2)
+            s.close()
+            return True
+        except Exception:
+            pass
+        return False
 
     def is_active(self):
        return self.activated
@@ -49,12 +69,17 @@ class Tracker():
         # Positionsabfrage für die Payload
         # LAT, LON, TSPOS, SOG
         return (self.lat, self.lon, self.tspos, self.sog)
-
+    """
     def hero_add_race(self, raceid):
         self.races.add(raceid)
 
     def hero_set_races(self, newraces):
         self.races = set(newraces)
+    """
+    def hero_get_races(self):
+        if not self.hero_orgstatus:
+            return []
+        return [r for r in self.hero_orgstatus['races']]
 
     def mqtt_on_connect(self, client, userdata, flags, rc):
         print(f"MQTT connected with result code {rc}")
@@ -85,18 +110,15 @@ class Tracker():
             self.trace_fh.flush()
         if msg.topic == "regattahero/orgstatus/thomas":
             # kommt alle 10s
-            orgstatus = json.loads(msg.payload)
-            if orgstatus['allLogout']:
+            self.hero_orgstatus = json.loads(msg.payload)
+            if self.hero_orgstatus['allLogout']:
                 print("All logout received!")
                 client.disconnect()
                 sys.exit(0) # TODO nur die MQTT-Task beenden
-            if orgstatus['message']:
+            if self.hero_orgstatus['message']:
                 # TODO Alarm-Funktion nutzen?
                 print("Nachricht der Wettfahrtkeitung:")
                 print(orgstatus['message'])
-            print(orgstatus['races'])
-            #for r in orgstatus['races']:
-            #    print(f"Race: {r}")
         elif msg.topic.startswith("regattahero/racestatus/thomas"):
             # kommt alle 1s
             # dem Topic angehängt ist noch die raceid
@@ -136,6 +158,7 @@ class Tracker():
 
     def mqtt_tracker(self, cfg, boat, appdata, boatdata):
         print("MQTT tracker enabled")
+        self.appdata = appdata
         self.trace = cfg['trace']
         client = mqtt.Client()
         client.on_connect = self.mqtt_on_connect