Nomination: pin nomination announcements

2 files changed, 23 insertions, 4 deletions

diff --git a/bot/exts/recruitment/talentpool/_review.py b/bot/exts/recruitment/talentpool/_review.py
index 04581ec13..ddad5c9c0 100644
--- a/bot/exts/recruitment/talentpool/_review.py
+++ b/bot/exts/recruitment/talentpool/_review.py
@@ -16,7 +16,7 @@ from discord.ext.commands import Context
 from bot.api import ResponseCodeError
 from bot.bot import Bot
 from bot.constants import Channels, Colours, Emojis, Guild, Roles
-from bot.utils.messages import count_unique_users_reaction
+from bot.utils.messages import count_unique_users_reaction, pin_no_system_message
 from bot.utils.scheduling import Scheduler
 from bot.utils.time import get_time_delta, humanize_delta, time_since
 
@@ -77,10 +77,14 @@ class Reviewer:
         channel = guild.get_channel(Channels.nomination_voting)
 
         log.trace(f"Posting the review of {user_id}")
-        message = (await self._bulk_send(channel, review))[-1]
+        messages = await self._bulk_send(channel, review)
+
+        await pin_no_system_message(messages[0])
+
+        last_message = messages[-1]
         if seen_emoji:
             for reaction in (seen_emoji, "\N{THUMBS UP SIGN}", "\N{THUMBS DOWN SIGN}"):
-                await message.add_reaction(reaction)
+                await last_message.add_reaction(reaction)
 
         if update_database:
             nomination = self._pool.watched_users[user_id]
diff --git a/bot/utils/messages.py b/bot/utils/messages.py
index 2fcc5a01f..d0d56e273 100644
--- a/bot/utils/messages.py
+++ b/bot/utils/messages.py
@@ -8,7 +8,7 @@ from io import BytesIO
 from typing import Callable, List, Optional, Sequence, Union
 
 import discord
-from discord import Reaction
+from discord import Message, MessageType, Reaction
 from discord.errors import HTTPException
 from discord.ext.commands import Context
 
@@ -186,6 +186,21 @@ async def count_unique_users_reaction(
     return len(unique_users)
 
 
+async def pin_no_system_message(message: Message) -> bool:
+    """Pin the given message, wait a couple of seconds and try to delete the system message."""
+    await message.pin()
+
+    # Make sure that we give it enough time to deliver the message
+    await asyncio.sleep(2)
+    # Search for the system message in the last 10 messages
+    async for historical_message in message.channel.history(limit=10):
+        if historical_message.type == MessageType.pins_add:
+            await historical_message.delete()
+            return True
+
+    return False
+
+
 def sub_clyde(username: Optional[str]) -> Optional[str]:
     """
     Replace "e"/"E" in any "clyde" in `username` with a Cyrillic "е"/"E" and return the new string.