Fix some issues with remindme command

cogs/extras.py

@@ -498,15 +498,19 @@ class Extras(commands.GroupCog):
     @commands.dynamic_cooldown(KurisuCooldown(1, 300.0), commands.BucketType.member)
     @commands.hybrid_command()
     async def remindme(self, ctx: KurisuContext, remind_in: int = commands.parameter(converter=DateOrTimeToSecondsConverter), *, reminder: str):
-        """Sends a reminder after a set time, just for you. Max reminder size is 800 characters.
+        """Sends a reminder after a set time, just for you.
+        Date format is only supported for slash command and date is treated as UTC.
+        Max reminder size is 800 characters.
 
         Args:
-            remind_in: Time to remind you in can be in a #d#h#m#s format or a YYYY-MM-DD HH:MM:SS format.
+            remind_in: Time to remind you in, can be in a #d#h#m#s format or a YYYY-MM-DD HH:MM format.
             reminder: Contents of the reminders. Max 800 characters.
         """
         if remind_in < 30 or remind_in > 3.154e+7:
+            ctx.command.reset_cooldown(ctx)
             return await ctx.send("You can't set a reminder for less than 30 seconds or for more than a year.")
         if len(reminder) > 800:
+            ctx.command.reset_cooldown(ctx)
             return await ctx.send("The reminder is too big! (Longer than 800 characters)")
         timestamp = datetime.now(self.bot.tz)
         delta = timedelta(seconds=remind_in)

utils/converters.py

@@ -1,6 +1,6 @@
 import discord
 
-from datetime import datetime
+from datetime import datetime, timezone
 from discord import app_commands, Member
 from discord.ext.commands import BadArgument, MemberConverter, ObjectConverter, MessageConverter, Context, Converter, ObjectNotFound, ChannelNotFound
 from utils.utils import parse_date, parse_time
@@ -43,7 +43,7 @@ class MemberOrID(Converter):
 class DateOrTimeToSecondsConverter(Converter):
     async def convert(self, ctx: Context, arg: str):
         if (datetime_obj := parse_date(arg)) is not None:
-            return int((datetime_obj - datetime.utcnow()).total_seconds())
+            return int((datetime_obj - datetime.now(timezone.utc)).total_seconds())
         elif (seconds := parse_time(arg)) != -1:
             return seconds
         raise BadArgument("Invalid date/time format")

utils/utils.py

@@ -126,6 +126,7 @@ def parse_date(date_string: str) -> Optional[datetime.datetime]:
         return None
     try:
         datetime_obj = datetime.datetime.strptime(' '.join(date_lst), "%Y-%m-%d %H:%M")
+        datetime_obj = datetime_obj.replace(tzinfo=datetime.timezone.utc)
     except ValueError:
         return None
     return datetime_obj