Add finish hook to listeners.

This hook provides the counter-point for setup and provides a place
to finalize analysis and possibly store the results externally.

Author: GraylinKim

sc2reader/listeners/apm.py

@@ -22,5 +22,8 @@ def __call__(self, event, replay):
             # Count up the APS, APM
             minute =  event.second/60.0
             player.aps[event.second] += 1
-            player.apm[int(minutes)] += 1
-            player.avg_apm = sum(player.apm.values())/minutes
+            player.apm[int(minute)] += 1
+
+    def finish(self, replay):
+        for player in replay.players:
+            player.avg_apm = sum(player.apm.values())/len(player.apm.keys())

sc2reader/listeners/utils.py

@@ -4,8 +4,14 @@ class ListenerBase(object):
     def __init__(self):
         self.logger = log_utils.get_logger(self.__class__)
 
+    def setup(self, replay):
+        pass
+
     def accepts(self, event):
         return true
 
-    def setup(self, replay):
-        pass
+    def __call__(self, event, replay):
+        raise NotImplementedError()
+
+    def finish(self, replay):
+        pass

sc2reader/resources.py

@@ -363,6 +363,9 @@ def start(self):
                 if listener.accepts(event):
                     listener(event, self)
 
+        for listener in self.listeners:
+            listener.finish(self)
+
 
 class Map(Resource):
     url_template = 'http://{0}.depot.battle.net:1119/{1}.s2ma'