Add Messageable.ack

discord/abc.py

@@ -776,3 +776,25 @@ class Messageable(metaclass=abc.ABCMeta):
                         counter += 1
         """
         return HistoryIterator(self, limit=limit, before=before, after=after, around=around, reverse=reverse)
+
+    @asyncio.coroutine
+    def ack(self):
+        """|coro|
+
+        Marks this channel as read.
+
+        The user must not be a bot user.
+
+        Raises
+        -------
+        HTTPException
+            Acking failed.
+        ClientException
+            You must not be a bot user.
+        """
+
+        state = self._state
+        if state.is_bot:
+            raise ClientException('Must not be a bot account to ack messages.')
+        channel = yield from self._get_channel()
+        yield from state.http.ack_channel(channel.id)

discord/http.py

@@ -329,6 +329,12 @@ class HTTPClient:
         data = yield from self.request(r, json={'token': self._ack_token})
         self._ack_token = data['token']
 
+    @asyncio.coroutine
+    def ack_channel(self, channel_id):
+        r = Route('POST', '/channels/{channel_id}/ack', channel_id=channel_id)
+        data = yield from self.request(r, json={'token': self._ack_token})
+        self._ack_token = data['token']
+
     def ack_guild(self, guild_id):
         return self.request(Route('POST', '/guilds/{guild_id}/ack', guild_id=guild_id))