Add moon tracker

telescope.ini

@@ -2,6 +2,7 @@
 HostName: consoledemo.dmz.camras.nl
 Port_Read_Status : 11020
 Port_Read_J2000  : 11030
+Port_Read_Moon   : 11080
 Port_Read_Model  : 11090
 Port_Write_J2000 : 11031
 Port_Write_AzEl  : 11041

telescope.py

@@ -125,6 +125,12 @@ class Telescope:
         thread_read_model.daemon = True
         thread_read_model.start()
 
+        self._event_moon = threading.Event()
+        thread_read_moon = threading.Thread(target=self._readmoon, args=(
+            consoleHost, config.getint('Console', 'Port_Read_Moon')))
+        thread_read_moon.daemon = True
+        thread_read_moon.start()
+
     def _readj2000(self, consoleHost, j2000_read_port):
         """
         Poll the socket with the J2000 info, store its values in class members
@@ -223,6 +229,34 @@ class Telescope:
             self.offset_el = (float(vals[2]) * u.rad).to(u.deg)
             self._event_status.set()
 
+    def _readmoon(self, host, port):
+        """
+        Poll the socket with the moon, store the values in class members
+        :param host: Hostname
+        :param port: Port at which the model is running
+        :return: None
+        """
+        try:
+            moonsocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+            moonsocket.connect((host, port))
+        except socket.error:
+            raise IOError("Cannot connect to moon server " + host + " at port " + str(port))
+
+        while True:
+            readable, writable, exceptional = select.select(
+                [moonsocket], [], [])
+            if len(exceptional) > 0:
+                raise IOError("Error with moon read socket")
+            msg = readable[0].recv(4096).decode("UTF-8")
+
+            # Read the flags, they look like "enabled=0,refraction=1,dt_model=0"
+            switches = [kv.split("=") for kv in msg.strip().split(",")]
+            if self.tracker == "console/moontracker":
+                self.tracking_enabled = bool(int(switches[0][1]))
+                self.model_enabled = bool(int(switches[1][1]))
+
+            self._event_moon.set()
+
     def _readmodel(self, host, port):
         """
         Poll the socket with the model, store the values in class members