[commands] Added BucketType.members for cooldowns

discord/ext/commands/cooldowns.py

@@ -31,8 +31,9 @@ __all__ = ['BucketType', 'Cooldown', 'CooldownMapping']
 class BucketType(enum.Enum):
     default = 0
     user    = 1
-    guild  = 2
+    guild   = 2
     channel = 3
+    member  = 4
 
 class Cooldown:
     __slots__ = ('rate', 'per', 'type', '_window', '_tokens', '_last')
@@ -111,6 +112,8 @@ class CooldownMapping:
             return (msg.guild or msg.author).id
         elif bucket_type is BucketType.channel:
             return msg.channel.id
+        elif bucket_type is BucketType.member:
+            return ((msg.guild and msg.guild.id), msg.author.id)
 
     def _verify_cache_integrity(self):
         # we want to delete all cache objects that haven't been used