Use aware objects when storing and reading UTC timestamps (#4017)

* Use aware objects instead of naive ones

* Use aware objects when storing and reading UTC timestamps

* Remove unneeded parentheses

* Fixed naive and aware objects unable to be compared here

* Address feedback

* Fix the newly added `modlog.create_case()` calls

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

redbot/cogs/filter/filter.py

@@ -1,5 +1,6 @@
 import discord
 import re
+from datetime import timezone
 from typing import Union, Set, Literal
 
 from redbot.core import checks, Config, modlog, commands
@@ -339,10 +340,11 @@ class Filter(commands.Cog):
         filter_time = guild_data["filterban_time"]
         user_count = member_data["filter_count"]
         next_reset_time = member_data["next_reset_time"]
+        created_at = message.created_at.replace(tzinfo=timezone.utc)
 
         if filter_count > 0 and filter_time > 0:
-            if message.created_at.timestamp() >= next_reset_time:
-                next_reset_time = message.created_at.timestamp() + filter_time
+            if created_at.timestamp() >= next_reset_time:
+                next_reset_time = created_at.timestamp() + filter_time
                 async with self.config.member(author).all() as member_data:
                     member_data["next_reset_time"] = next_reset_time
                     if user_count > 0:
@@ -361,10 +363,7 @@ class Filter(commands.Cog):
                 if filter_count > 0 and filter_time > 0:
                     user_count += 1
                     await self.config.member(author).filter_count.set(user_count)
-                    if (
-                        user_count >= filter_count
-                        and message.created_at.timestamp() < next_reset_time
-                    ):
+                    if user_count >= filter_count and created_at.timestamp() < next_reset_time:
                         reason = _("Autoban (too many filtered messages.)")
                         try:
                             await guild.ban(author, reason=reason)
@@ -374,7 +373,7 @@ class Filter(commands.Cog):
                             await modlog.create_case(
                                 self.bot,
                                 guild,
-                                message.created_at,
+                                message.created_at.replace(tzinfo=timezone.utc),
                                 "filterban",
                                 author,
                                 guild.me,

redbot/cogs/mod/events.py

@@ -1,5 +1,5 @@
 import logging
-from datetime import datetime
+from datetime import timezone
 from collections import defaultdict, deque
 
 import discord
@@ -60,7 +60,7 @@ class Events(MixinMeta):
                     await modlog.create_case(
                         self.bot,
                         guild,
-                        message.created_at,
+                        message.created_at.replace(tzinfo=timezone.utc),
                         "ban",
                         author,
                         guild.me,
@@ -84,7 +84,7 @@ class Events(MixinMeta):
                     await modlog.create_case(
                         self.bot,
                         guild,
-                        message.created_at,
+                        message.created_at.replace(tzinfo=timezone.utc),
                         "kick",
                         author,
                         guild.me,
@@ -116,7 +116,7 @@ class Events(MixinMeta):
                 await modlog.create_case(
                     self.bot,
                     guild,
-                    message.created_at,
+                    message.created_at.replace(tzinfo=timezone.utc),
                     "warning",
                     author,
                     guild.me,

redbot/cogs/mod/kickban.py

@@ -1,7 +1,7 @@
 import asyncio
 import contextlib
 import logging
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from typing import Optional, Union
 
 import discord
@@ -120,7 +120,7 @@ class KickBanMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "ban",
                 user,
                 author,
@@ -142,10 +142,11 @@ class KickBanMixin(MixinMeta):
 
                 async with self.config.guild(guild).current_tempbans() as guild_tempbans:
                     for uid in guild_tempbans.copy():
-                        unban_time = datetime.utcfromtimestamp(
-                            await self.config.member_from_ids(guild.id, uid).banned_until()
+                        unban_time = datetime.fromtimestamp(
+                            await self.config.member_from_ids(guild.id, uid).banned_until(),
+                            timezone.utc,
                         )
-                        if datetime.utcnow() > unban_time:  # Time to unban the user
+                        if datetime.now(timezone.utc) > unban_time:  # Time to unban the user
                             queue_entry = (guild.id, uid)
                             try:
                                 await guild.unban(
@@ -228,7 +229,7 @@ class KickBanMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "kick",
                 user,
                 author,
@@ -410,7 +411,7 @@ class KickBanMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "hackban",
                 user_id,
                 author,
@@ -436,7 +437,7 @@ class KickBanMixin(MixinMeta):
         """Temporarily ban a user from this server."""
         guild = ctx.guild
         author = ctx.author
-        unban_time = datetime.utcnow() + duration
+        unban_time = datetime.now(timezone.utc) + duration
 
         if author == user:
             await ctx.send(
@@ -491,7 +492,7 @@ class KickBanMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "tempban",
                 user,
                 author,
@@ -574,7 +575,7 @@ class KickBanMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "softban",
                 user,
                 author,
@@ -621,7 +622,7 @@ class KickBanMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "vkick",
                 member,
                 author,
@@ -660,7 +661,7 @@ class KickBanMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "unban",
                 user,
                 author,

redbot/cogs/mod/mutes.py

@@ -1,4 +1,5 @@
 import asyncio
+from datetime import timezone
 from typing import cast, Optional
 
 import discord
@@ -107,7 +108,7 @@ class MuteMixin(MixinMeta):
         await modlog.create_case(
             self.bot,
             guild,
-            ctx.message.created_at,
+            ctx.message.created_at.replace(tzinfo=timezone.utc),
             "voiceunban",
             user,
             author,
@@ -148,7 +149,7 @@ class MuteMixin(MixinMeta):
         await modlog.create_case(
             self.bot,
             guild,
-            ctx.message.created_at,
+            ctx.message.created_at.replace(tzinfo=timezone.utc),
             "voiceban",
             user,
             author,
@@ -188,7 +189,7 @@ class MuteMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "vmute",
                 user,
                 author,
@@ -232,7 +233,7 @@ class MuteMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "cmute",
                 user,
                 author,
@@ -262,7 +263,7 @@ class MuteMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "smute",
                 user,
                 author,
@@ -305,7 +306,7 @@ class MuteMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "vunmute",
                 user,
                 author,
@@ -349,7 +350,7 @@ class MuteMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "cunmute",
                 user,
                 author,
@@ -383,7 +384,7 @@ class MuteMixin(MixinMeta):
             await modlog.create_case(
                 self.bot,
                 guild,
-                ctx.message.created_at,
+                ctx.message.created_at.replace(tzinfo=timezone.utc),
                 "sunmute",
                 user,
                 author,

redbot/cogs/modlog/modlog.py

@@ -1,3 +1,4 @@
+from datetime import timezone
 from typing import Optional, Union
 
 import discord
@@ -181,7 +182,7 @@ class ModLog(commands.Cog):
         to_modify = {"reason": reason}
         if case_obj.moderator != author:
             to_modify["amended_by"] = author
-        to_modify["modified_at"] = ctx.message.created_at.timestamp()
+        to_modify["modified_at"] = ctx.message.created_at.replace(tzinfo=timezone.utc).timestamp()
         await case_obj.edit(to_modify)
         await ctx.send(
             _("Reason for case #{num} has been updated.").format(num=case_obj.case_number)

redbot/cogs/warnings/warnings.py

@@ -1,5 +1,6 @@
 import asyncio
 import contextlib
+from datetime import timezone
 from collections import namedtuple
 from copy import copy
 from typing import Union, Optional, Literal
@@ -494,7 +495,7 @@ class Warnings(commands.Cog):
         await modlog.create_case(
             self.bot,
             ctx.guild,
-            ctx.message.created_at,
+            ctx.message.created_at.replace(tzinfo=timezone.utc),
             "warning",
             user,
             ctx.message.author,
@@ -616,7 +617,7 @@ class Warnings(commands.Cog):
         await modlog.create_case(
             self.bot,
             ctx.guild,
-            ctx.message.created_at,
+            ctx.message.created_at.replace(tzinfo=timezone.utc),
             "unwarned",
             member,
             ctx.message.author,