Make checks in Bank, Economy and Trivia cogs Permissions-friendly (#3672)

* Create converters.py

* Update trivia.py

* Create checks.py

* Update checks.py

* Update checks.py

* Update trivia.py

* Update checks.py

* Update checks.py

* Update trivia.py

* Update bank.py

* Update economy.py

* Update trivia.py

* Update checks.py

* Update checks.py

* Update __init__.py

redbot/cogs/trivia/checks.py

@@ -0,0 +1,25 @@
+from redbot.core import commands
+from redbot.core.i18n import Translator
+
+__all__ = ("trivia_stop_check",)
+
+_ = Translator("Trivia", __file__)
+
+
+def trivia_stop_check():
+    async def predicate(ctx: commands.GuildContext) -> bool:
+        session = ctx.cog._get_trivia_session(ctx.channel)
+        if session is None:
+            raise commands.CheckFailure(_("There is no ongoing trivia session in this channel."))
+
+        author = ctx.author
+        auth_checks = (
+            await ctx.bot.is_owner(author),
+            await ctx.bot.is_mod(author),
+            await ctx.bot.is_admin(author),
+            author == ctx.guild.owner,
+            author == session.ctx.author,
+        )
+        return any(auth_checks)
+
+    return commands.permissions_check(predicate)