Change Messageable channel getter to be a coroutine.

discord/abc.py

@@ -467,6 +467,7 @@ class GuildChannel:
 class Messageable(metaclass=abc.ABCMeta):
     __slots__ = ()
 
+    @asyncio.coroutine
     @abc.abstractmethod
     def _get_channel(self):
         raise NotImplementedError
@@ -534,7 +535,7 @@ class Messageable(metaclass=abc.ABCMeta):
             The message that was sent.
         """
 
-        channel = self._get_channel()
+        channel = yield from self._get_channel()
         guild_id = self._get_guild_id()
         state = self._state
         content = str(content) if content else None
@@ -576,7 +577,7 @@ class Messageable(metaclass=abc.ABCMeta):
         *Typing* indicator will go away after 10 seconds, or after a message is sent.
         """
 
-        channel = self._get_channel()
+        channel = yield from self._get_channel()
         yield from self._state.http.send_typing(channel.id)
 
     def typing(self):
@@ -596,7 +597,8 @@ class Messageable(metaclass=abc.ABCMeta):
                 await channel.send_message('done!')
 
         """
-        return Typing(self._get_channel())
+        channel = yield from self._get_channel()
+        return Typing(channel)
 
     @asyncio.coroutine
     def get_message(self, id):
@@ -626,7 +628,7 @@ class Messageable(metaclass=abc.ABCMeta):
             Retrieving the message failed.
         """
 
-        channel = self._get_channel()
+        channel = yield from self._get_channel()
         data = yield from self._state.http.get_message(channel.id, id)
         return state.create_message(channel=channel, data=data)
 
@@ -660,7 +662,7 @@ class Messageable(metaclass=abc.ABCMeta):
             raise ClientException('Can only delete messages in the range of [2, 100]')
 
         message_ids = [m.id for m in messages]
-        channel = self._get_channel()
+        channel = yield from self._get_channel()
         guild_id = self._get_guild_id()
 
         yield from self._state.http.delete_messages(channel.id, message_ids, guild_id)
@@ -677,7 +679,7 @@ class Messageable(metaclass=abc.ABCMeta):
             Retrieving the pinned messages failed.
         """
 
-        channel = self._get_channel()
+        channel = yield from self._get_channel()
         state = self._state
         data = yield from state.http.pins_from(channel.id)
         return [state.create_message(channel=channel, data=m) for m in data]
@@ -745,7 +747,7 @@ class Messageable(metaclass=abc.ABCMeta):
                     if message.author == client.user:
                         counter += 1
         """
-        return LogsFromIterator(self._get_channel(), limit=limit, before=before, after=after, around=around, reverse=reverse)
+        return LogsFromIterator(self, limit=limit, before=before, after=after, around=around, reverse=reverse)
 
     @asyncio.coroutine
     def purge(self, *, limit=100, check=None, before=None, after=None, around=None):

discord/channel.py

@@ -88,6 +88,7 @@ class TextChannel(discord.abc.Messageable, discord.abc.GuildChannel, Hashable):
         self.position = data['position']
         self._fill_overwrites(data)
 
+    @asyncio.coroutine
     def _get_channel(self):
         return self
 
@@ -262,6 +263,7 @@ class DMChannel(discord.abc.Messageable, Hashable):
         self.me = me
         self.id = int(data['id'])
 
+    @asyncio.coroutine
     def _get_channel(self):
         return self
 
@@ -360,6 +362,7 @@ class GroupChannel(discord.abc.Messageable, Hashable):
         else:
             self.owner = utils.find(lambda u: u.id == owner_id, self.recipients)
 
+    @asyncio.coroutine
     def _get_channel(self):
         return self
 

discord/ext/commands/context.py

@@ -117,6 +117,7 @@ class Context(discord.abc.Messageable):
         ret = yield from command.callback(*arguments, **kwargs)
         return ret
 
+    @asyncio.coroutine
     def _get_channel(self):
         return self.channel
 

discord/iterators.py

@@ -70,7 +70,7 @@ class LogsFromIterator:
         will be out of order.
     """
 
-    def __init__(self, channel, limit,
+    def __init__(self, messageable, limit,
                  before=None, after=None, around=None, reverse=None):
 
         if isinstance(before, datetime.datetime):
@@ -80,9 +80,7 @@ class LogsFromIterator:
         if isinstance(around, datetime.datetime):
             around = Object(id=time_snowflake(around))
 
-        self.channel = channel
-        self.ctx = channel._state
-        self.logs_from = channel._state.http.logs_from
+        self.messageable = messageable
         self.limit = limit
         self.before = before
         self.after = after
@@ -135,6 +133,13 @@ class LogsFromIterator:
 
     @asyncio.coroutine
     def fill_messages(self):
+        if not hasattr(self, 'channel'):
+            # do the required set up
+            channel = yield from self.messageable._get_channel()
+            self.channel = channel
+            self.state = channel._state
+            self.logs_from = channel._state.http.logs_from
+
         if self.limit > 0:
             retrieve = self.limit if self.limit <= 100 else 100
             data = yield from self._retrieve_messages(retrieve)
@@ -144,9 +149,8 @@ class LogsFromIterator:
                 data = filter(self._filter, data)
 
             channel = self.channel
-            state = self.ctx
             for element in data:
-                yield from self.messages.put(state.create_message(channel=channel, data=element))
+                yield from self.messages.put(self.state.create_message(channel=channel, data=element))
 
     @asyncio.coroutine
     def _retrieve_messages(self, retrieve):