Adding the delete/hangup channel system

ari.py

@@ -111,6 +111,16 @@ class Channel(object):
             return ari_call(self.config, ['channels', self.name, 'play', playback_id], 'POST', {'media': media, 'lang': lang})
         except:
             raise
+
+    def delete(self):
+        '''
+        Delete the channel (hangup)
+        '''
+        try:
+            return ari_call(self.config, ['channels', self.name], 'DEL', {})
+        except:
+            raise
+
 class Playback(object):
     '''
     This object is used to manage ARI calls for playbacks.

piphone.py

@@ -211,7 +211,8 @@ class Call(object):
     history = []
     actions = {'Created': 'call_caller'
         , 'ChannelStateChange': 'change'
-        , 'ChannelDtmfReceived': 'dtmf'}
+        , 'ChannelDtmfReceived': 'dtmf'
+        , 'Hangup': 'hangup'}
 
     def __init__(self, caller, callee, owner, callid=None, db=None):
         try:
@@ -266,6 +267,29 @@ class Call(object):
         if state in self.actions:
             getattr(self, self.actions[state])(event=event)
 
+    def hangup(self, event):
+        '''
+        There's a call which has lost connection. Probably someone who hanged up the call.
+        We need to check if the other side is still up, which can be done by checking
+        the bridge item (it is in the channels part of the bridge object) and see if there's
+        more than one channel.
+        If there's more than one, then we need to send a hangup to the other side and then delete
+        our channel, if not we need to delete ourselves and then delete the bridge.
+        '''
+        bridge_id = '-'.join(event['channel']['id'].split('-')[:-1])
+        bridge = ari.Bridge(config['asterisk'], bridge_id, 'mixed')
+        results = json.loads(bridge.status())
+        if len(results['channels']) == 0:
+            # We were the last channel standing
+            phone_logger.info('Deleting bridge {}'.format(bridge_id))
+            bridge.delete()
+        else:
+            # There's at least one channel standing
+            for channel in results['channels']:
+                chan = ari.Channel(config['asterisk'], channel)
+                phone_logger.info('Hanging up channel {}'.format(channel))
+                chan.delete()
+
     def dtmf(self, event):
         '''
         We received a DTMF sequence