Initial support for Discord timestamping (#5155)

* Initial support for Discord timestamping

* Fix timezones

* Fix userinfo for users with member.joined_at equal to None

* Simplify

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

redbot/cogs/general/general.py

@@ -254,10 +254,8 @@ class General(commands.Cog):
         Default to False.
         """
         guild = ctx.guild
-        passed = (ctx.message.created_at - guild.created_at).days
-        created_at = _("Created on {date}. That's over {num} days ago!").format(
-            date=guild.created_at.strftime("%d %b %Y %H:%M"),
-            num=humanize_number(passed),
+        created_at = _("Created on <t:{0}:D>. That's <t:{0}:R>!").format(
+            int(guild.created_at.replace(tzinfo=datetime.timezone.utc).timestamp()),
         )
         online = humanize_number(
             len([m.status for m in guild.members if m.status != discord.Status.offline])

redbot/cogs/mod/names.py

@@ -1,4 +1,4 @@
-from datetime import datetime
+import datetime
 from typing import cast
 
 import discord
@@ -176,21 +176,16 @@ class ModInfo(MixinMeta):
             member = author
 
         #  A special case for a special someone :^)
-        special_date = datetime(2016, 1, 10, 6, 8, 4, 443000)
+        special_date = datetime.datetime(2016, 1, 10, 6, 8, 4, 443000, datetime.timezone.utc)
         is_special = member.id == 96130341705637888 and guild.id == 133049272517001216
 
         roles = member.roles[-1:0:-1]
         names, nicks = await self.get_names_and_nicks(member)
 
-        joined_at = member.joined_at if not is_special else special_date
-        since_created = (ctx.message.created_at - member.created_at).days
-        if joined_at is not None:
-            since_joined = (ctx.message.created_at - joined_at).days
-            user_joined = joined_at.strftime("%d %b %Y %H:%M")
-        else:
-            since_joined = "?"
-            user_joined = _("Unknown")
-        user_created = member.created_at.strftime("%d %b %Y %H:%M")
+        joined_at = member.joined_at.replace(tzinfo=datetime.timezone.utc)
+        if is_special:
+            joined_at = special_date
+        user_created = int(member.created_at.replace(tzinfo=datetime.timezone.utc).timestamp())
         voice_state = member.voice
         member_number = (
             sorted(guild.members, key=lambda m: m.joined_at or ctx.message.created_at).index(
@@ -199,8 +194,11 @@ class ModInfo(MixinMeta):
             + 1
         )
 
-        created_on = _("{}\n({} days ago)").format(user_created, since_created)
-        joined_on = _("{}\n({} days ago)").format(user_joined, since_joined)
+        created_on = "<t:{0}:D>\n(<t:{0}:R>)".format(user_created)
+        if joined_at is not None:
+            joined_on = "<t:{0}:D>\n(<t:{0}:R>)".format(int(joined_at.timestamp()))
+        else:
+            joined_on = _("Unknown")
 
         if any(a.type is discord.ActivityType.streaming for a in member.activities):
             statusemoji = "\N{LARGE PURPLE CIRCLE}"

redbot/core/modlog.py

@@ -432,9 +432,9 @@ class Case:
         until = None
         duration = None
         if self.until:
-            start = datetime.utcfromtimestamp(self.created_at)
-            end = datetime.utcfromtimestamp(self.until)
-            end_fmt = end.strftime("%Y-%m-%d %H:%M:%S UTC")
+            start = datetime.fromtimestamp(self.created_at, tz=timezone.utc)
+            end = datetime.fromtimestamp(self.until, tz=timezone.utc)
+            end_fmt = f"<t:{int(end.timestamp())}>"
             duration = end - start
             dur_fmt = _strfdelta(duration)
             until = end_fmt
@@ -454,9 +454,7 @@ class Case:
 
         last_modified = None
         if self.modified_at:
-            last_modified = "{}".format(
-                datetime.utcfromtimestamp(self.modified_at).strftime("%Y-%m-%d %H:%M:%S UTC")
-            )
+            last_modified = f"<t:{self.modified_at}>"
 
         if isinstance(self.user, int):
             if self.user == 0xDE1: