added fallback category

Author: DAzVise

bot.py

@@ -738,7 +738,7 @@ async def process_dm_modmail(self, message: discord.Message) -> None:
                 await self.add_reaction(message, blocked_emoji)
                 return await message.channel.send(embed=embed)
 
-            thread = self.threads.create(message.author)
+            thread = await self.threads.create(message.author)
         else:
             if self.config["dm_disabled"] == 2:
                 embed = discord.Embed(

core/config.py

@@ -27,6 +27,7 @@ class ConfigManager:
         "twitch_url": "https://www.twitch.tv/discordmodmail/",
         # bot settings
         "main_category_id": None,
+        "fallback_category_id": None,
         "prefix": "?",
         "mention": "@here",
         "main_color": str(discord.Color.blurple()),

core/config_help.json

@@ -20,6 +20,16 @@
       "If the Modmail category ended up being non-existent/invalid, Modmail will break. To fix this, run `{prefix}setup` again or set `main_category_id` to a valid category."
     ]
   },
+  "fallback_category_id": {
+    "default": "`Fallback Modmail` (created when the main category is full)",
+    "description": "This is the category that will hold the threads when the main category is full.\n\nTo change the Fallback category, you will need to find the [category’s ID](https://support.discordapp.com/hc/en-us/articles/206346498).",
+    "examples": [
+      "`{prefix}config set fallback_category_id 9234932582312` (`9234932582312` is the category ID)"
+    ],
+    "notes": [
+      "If the Fallback category ended up being non-existent/invalid, Modmail will create a new one. To fix this, set `fallback_category_id` to a valid category."
+    ]
+  },
   "prefix": {
     "default": "`?`",
     "description": "The prefix of the bot.",

core/thread.py

@@ -846,7 +846,7 @@ def _find_from_channel(self, channel):
             return thread
         return None
 
-    def create(
+    async def create(
         self,
         recipient: typing.Union[discord.Member, discord.User],
         *,
@@ -859,11 +859,27 @@ def create(
         self.cache[recipient.id] = thread
 
         # Schedule thread setup for later
+        cat = self.bot.main_category
+        if len(cat.channels) == 50:
+            fallback_id = self.bot.config["fallback_category_id"]
+            fallback = discord.utils.get(cat.guild.categories, id=int(fallback_id))
+            if fallback and len(fallback.channels) != 50:
+                self.bot.loop.create_task(thread.setup(creator=creator, category=fallback))
+                return thread
+
+            fallback = await cat.clone(name="Fallback Modmail")
+            self.bot.config.set("fallback_category_id", fallback.id)
+            await self.bot.config.update()
+            self.bot.loop.create_task(thread.setup(creator=creator, category=fallback))
+            return thread
+
+        self.bot.loop.create_task(thread.setup(creator=creator, category=category))
+        return thread
         self.bot.loop.create_task(thread.setup(creator=creator, category=category))
         return thread
 
     async def find_or_create(self, recipient) -> Thread:
-        return await self.find(recipient=recipient) or self.create(recipient)
+        return await self.find(recipient=recipient) or await self.create(recipient)
 
     def format_channel_name(self, author):
         """Sanitises a username for use with text channel names"""