sharding (blacklists): Blacklist shard support.

Moved the `user_blacklist` and `guild_blacklist` to a client TTL cache.

bot/modules/study/stats_cmd.py

@@ -59,7 +59,7 @@ async def cmd_stats(ctx):
 
     # Leaderboard ranks
     exclude = set(m.id for m in ctx.guild_settings.unranked_roles.members)
-    exclude.update(ctx.client.objects['blacklisted_users'])
+    exclude.update(ctx.client.user_blacklist())
     exclude.update(ctx.client.objects['ignored_members'][ctx.guild.id])
     if target.id in exclude:
         time_rank = None

bot/modules/study/top_cmd.py

@@ -40,7 +40,7 @@ async def cmd_top(ctx):
 
     # Fetch the leaderboard
     exclude = set(m.id for m in ctx.guild_settings.unranked_roles.members)
-    exclude.update(ctx.client.objects['blacklisted_users'])
+    exclude.update(ctx.client.user_blacklist())
     exclude.update(ctx.client.objects['ignored_members'][ctx.guild.id])
 
     args = {

bot/modules/study/tracking/session_tracker.py

@@ -298,7 +298,7 @@ async def session_voice_tracker(client, member, before, after):
             pending.cancel()
 
         if after.channel:
-            blacklist = client.objects['blacklisted_users']
+            blacklist = client.user_blacklist()
             guild_blacklist = client.objects['ignored_members'][guild.id]
             untracked = untracked_channels.get(guild.id).data
             start_session = (

bot/modules/study/tracking/time_tracker.py

@@ -47,7 +47,7 @@ def _scan(guild):
     members = itertools.chain(*channel_members)
     # TODO filter out blacklisted users
 
-    blacklist = client.objects['blacklisted_users']
+    blacklist = client.user_blacklist()
     guild_blacklist = client.objects['ignored_members'][guild.id]
 
     for member in members: