Adding configurable delay to video preview

rocketbot/cogs/videopreviewcog.py

 import json
 import re
 import subprocess
+from datetime import timedelta
 
 from discord import Message
 from discord.ext.commands import Cog
 		brief='Video link previews',
 		description='Whether links to certain social media videos should show previews.',
 	)
+	SETTING_DELAY = CogSetting(
+		'delay',
+		timedelta,
+		default_value=3,
+		brief='delay before attempting to fetch a preview',
+		description='How long to wait after a message is posted to see if Discord successfully loads a video preview',
+	)
 	SETTING_INSTAGRAM = CogSetting(
 		'instagram',
 		bool,
 		)
 		Self = VideoPreviewCog
 		self.add_setting(Self.SETTING_ENABLED)
+		self.add_setting(Self.SETTING_DELAY)
 		self.add_setting(Self.SETTING_INSTAGRAM)
 		self.add_setting(Self.SETTING_FACEBOOK)
 		self.add_setting(Self.SETTING_TWITTER)
 		return links
 
 	async def _wait_for_preview(self, message: Message, links: list[MessageLink]):
-		await asyncio.sleep(3)
+		Self = VideoPreviewCog
+		delay: timedelta = self.get_guild_setting(message.guild, Self.SETTING_DELAY)
+		await asyncio.sleep(delay.total_seconds)
 		# Look for embeds already showing the video
 		self.log(message.guild, "Checking message for embeds")
 		for embed in message.embeds: