Adding a periodic IMC2 keepalive event. Other IMC2-connected games are now aware of our presence via the keepalive. Woot.

src/imc2/events.py

@@ -0,0 +1,33 @@
+"""
+This module contains all IMC2 events that are triggered periodically.
+Most of these are used to maintain the existing connection and keep various
+lists/caches up to date.
+"""
+from src import events
+from src import scheduler
+from src.imc2 import connection as imc2_conn
+from src.imc2.packets import *
+
+class IEvt_IMC2_KeepAlive(events.IntervalEvent):
+    """
+    Event: Send periodic keepalives to network neighbors. This lets the other
+    games know that our game is still up and connected to the network. Also
+    provides some useful information about the client game.
+    """
+    name = 'IEvt_IMC2_KeepAlive'
+    # Send keep-alive packets every 15 minutes.
+    interval = 900
+    description = "Send an IMC2 keepalive packet."
+    
+    def event_function(self):
+        """
+        This is the function that is fired every self.interval seconds.
+        """
+        packet = IMC2PacketIsAlive()
+        imc2_conn.IMC2_PROTOCOL_INSTANCE.send_packet(packet)
+
+def add_events():
+    """
+    Adds the IMC2 events to the scheduler.
+    """
+    scheduler.add_event(IEvt_IMC2_KeepAlive())