Add support for "Do Not Disturb" and "Invisible" statuses.

This deprecates Client.change_status in favour of the newer and more
correct Client.change_presence.

discord/gateway.py

@@ -29,7 +29,7 @@ import websockets
 import asyncio
 import aiohttp
 from . import utils, compat
-from .enums import Status
+from .enums import Status, try_enum
 from .game import Game
 from .errors import GatewayNotFound, ConnectionClosed, InvalidArgument
 import logging
@@ -406,18 +406,25 @@ class DiscordWebSocket(websockets.client.WebSocketClientProtocol):
                 raise ConnectionClosed(e) from e
 
     @asyncio.coroutine
-    def change_presence(self, *, game=None, idle=None):
+    def change_presence(self, *, game=None, status=None, afk=False, since=0.0, idle=None):
         if game is not None and not isinstance(game, Game):
             raise InvalidArgument('game must be of Game or None')
 
-        idle_since = None if idle == False else int(time.time() * 1000)
+        if idle:
+            status = 'idle'
+
+        if status == 'idle':
+            since = int(time.time() * 1000)
+
         sent_game = dict(game) if game else None
 
         payload = {
             'op': self.PRESENCE,
             'd': {
                 'game': sent_game,
-                'idle_since': idle_since
+                'afk': afk,
+                'since': since,
+                'status': status
             }
         }
 
@@ -425,14 +432,17 @@ class DiscordWebSocket(websockets.client.WebSocketClientProtocol):
         log.debug('Sending "{}" to change status'.format(sent))
         yield from self.send(sent)
 
+        status_enum = try_enum(Status, status)
+        if status_enum is Status.invisible:
+            status_enum = Status.offline
+
         for server in self._connection.servers:
             me = server.me
             if me is None:
                 continue
 
             me.game = game
-            status = Status.idle if idle_since else Status.online
-            me.status = status
+            me.status = status_enum
 
     @asyncio.coroutine
     def request_sync(self, guild_ids):