Deseasonify: season-lock commands where appropriate

I left as many available as possible. Some of the commands also handle
being outside of their original season, e.g. by showing the amount of
time until Hacktoberfest begins, if not currently active. These were
left available as well.

If a group is to be locked, the `invoke_without_command` param must
be False (default), otherwise the group's callback will be circumvented
if a valid subcommand is invoked.

I adjusted these where necessary, except for the `HacktoberStats` cog,
whose cmd group takes an arg, which would require a more involved
adjustment - I decided to leave it as is, and instead manually lock
both subcommands.

1 files changed, 6 insertions, 4 deletions

diff --git a/bot/seasons/christmas/adventofcode.py b/bot/seasons/christmas/adventofcode.py
index 8caf43bd..e6100056 100644
--- a/bot/seasons/christmas/adventofcode.py
+++ b/bot/seasons/christmas/adventofcode.py
@@ -13,8 +13,8 @@ from bs4 import BeautifulSoup
 from discord.ext import commands
 from pytz import timezone
 
-from bot.constants import AdventOfCode as AocConfig, Channels, Colours, Emojis, Tokens, WHITELISTED_CHANNELS
-from bot.decorators import override_in_channel
+from bot.constants import AdventOfCode as AocConfig, Channels, Colours, Emojis, Month, Tokens, WHITELISTED_CHANNELS
+from bot.decorators import in_month, override_in_channel
 from bot.utils import unlocked_role
 
 log = logging.getLogger(__name__)
@@ -153,11 +153,13 @@ class AdventOfCode(commands.Cog):
         status_coro = countdown_status(self.bot)
         self.status_task = self.bot.loop.create_task(status_coro)
 
-    @commands.group(name="adventofcode", aliases=("aoc",), invoke_without_command=True)
+    @in_month(Month.december)
+    @commands.group(name="adventofcode", aliases=("aoc",))
     @override_in_channel(AOC_WHITELIST)
     async def adventofcode_group(self, ctx: commands.Context) -> None:
         """All of the Advent of Code commands."""
-        await ctx.send_help(ctx.command)
+        if not ctx.invoked_subcommand:
+            await ctx.send_help(ctx.command)
 
     @adventofcode_group.command(
         name="subscribe",