Support for new member message types.

discord/enums.py

@@ -46,6 +46,7 @@ class MessageType(Enum):
     channel_name_change = 4
     channel_icon_change = 5
     pins_add            = 6
+    new_member          = 7
 
 class GuildRegion(Enum):
     us_west       = 'us-west'

discord/message.py

@@ -365,6 +365,34 @@ class Message:
         if self.type is MessageType.channel_icon_change:
             return '{0.author.name} changed the channel icon.'.format(self)
 
+        if self.type is MessageType.new_member:
+            formats = [
+                "%s just joined the server - glhf!",
+                "%s just joined. Everyone, look busy!",
+                "%s just joined. Can I get a heal?",
+                "%s joined your party.",
+                "%s joined. You must construct additional pylons.",
+                "Ermagherd. %s is here.",
+                "Welcome, %s. Stay awhile and listen.",
+                "Welcome, %s. We were expecting you ( ͡° ͜ʖ ͡°)",
+                "Welcome, %s. We hope you brought pizza.",
+                "Welcome %s. Leave your weapons by the door.",
+                "A wild %s appeared.",
+                "Swoooosh. %s just landed.",
+                "Brace yourselves. %s just joined the server.",
+                "%s just joined. Hide your bananas.",
+                "%s just arrived. Seems OP - please nerf.",
+                "%s just slid into the server.",
+                "A %s has spawned in the server.",
+                "Big %s showed up!",
+                "Where’s %s? In the server!",
+                "%s hopped into the server. Kangaroo!!",
+                "%s just showed up. Hold my beer.",
+            ]
+
+            index = int(self.created_at.timestamp()) % len(formats)
+            return formats[index] % self.author.name
+
         if self.type is MessageType.call:
             # we're at the call message type now, which is a bit more complicated.
             # we can make the assumption that Message.channel is a PrivateChannel