From a17ccdb3d22d10070dfdc79077555fa840f93e96 Mon Sep 17 00:00:00 2001
From: Numerlor <25886452+Numerlor@users.noreply.github.com>
Date: Sun, 15 Mar 2020 18:06:20 +0100
Subject: Block commands until all instance vars are loaded.

---
 bot/cogs/moderation/silence.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/bot/cogs/moderation/silence.py b/bot/cogs/moderation/silence.py
index 3a3acf216..42047d0f7 100644
--- a/bot/cogs/moderation/silence.py
+++ b/bot/cogs/moderation/silence.py
@@ -60,6 +60,7 @@ class Silence(commands.Cog):
         self.bot = bot
         self.muted_channels = set()
         self._get_instance_vars_task = self.bot.loop.create_task(self._get_instance_vars())
+        self._get_instance_vars_event = asyncio.Event()
 
     async def _get_instance_vars(self) -> None:
         """Get instance variables after they're available to get from the guild."""
@@ -69,6 +70,7 @@ class Silence(commands.Cog):
         self._mod_alerts_channel = self.bot.get_channel(Channels.mod_alerts)
         self._mod_log_channel = self.bot.get_channel(Channels.mod_log)
         self.notifier = SilenceNotifier(self._mod_log_channel)
+        self._get_instance_vars_event.set()
 
     @commands.command(aliases=("hush",))
     async def silence(self, ctx: Context, duration: HushDurationConverter = 10) -> None:
@@ -78,6 +80,7 @@ class Silence(commands.Cog):
         Duration is capped at 15 minutes, passing forever makes the silence indefinite.
         Indefinitely silenced channels get added to a notifier which posts notices every 15 minutes from the start.
         """
+        await self._get_instance_vars_event.wait()
         log.debug(f"{ctx.author} is silencing channel #{ctx.channel}.")
         if not await self._silence(ctx.channel, persistent=(duration is None), duration=duration):
             await ctx.send(f"{Emojis.cross_mark} current channel is already silenced.")
@@ -99,6 +102,7 @@ class Silence(commands.Cog):
         Unsilence a previously silenced `channel`,
         remove it from notifier of indefinitely silenced channels and cancel the notifier if empty.
         """
+        await self._get_instance_vars_event.wait()
         log.debug(f"Unsilencing channel #{ctx.channel} from {ctx.author}'s command.")
         if await self._unsilence(ctx.channel):
             await ctx.send(f"{Emojis.check_mark} unsilenced current channel.")
-- 
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