fix(modmail): validate categories exist before opening ticket + clean stale tickets

commandes/modmail.py

@@ -31,7 +31,11 @@ class CategorySelect(discord.ui.Select):
         try:
             category_key = self.values[0]
             categories = cfg.get_categories()
-            cat = categories.get(category_key, {})
+            cat = categories.get(category_key)
+            if not cat:
+                await interaction.response.send_message("Cette categorie n'existe plus.", ephemeral=True)
+                return
+
             data = cfg.get_config()
             guild = interaction.client.get_guild(data.get("guild_id"))
             if not guild:
@@ -73,6 +77,9 @@ class TicketModal(discord.ui.Modal, title="Nouveau Ticket"):
         await interaction.response.defer(ephemeral=True)
         bot = interaction.client
         data = cfg.get_config()
+        if self.category_key not in cfg.get_categories():
+            await interaction.followup.send("La categorie n'existe plus. Reessayez.", ephemeral=True)
+            return
         guild = bot.get_guild(data.get("guild_id"))
         if not guild:
             await interaction.followup.send("Erreur serveur.", ephemeral=True)
@@ -422,6 +429,15 @@ class ModMail(commands.Cog):
                     await self._send_to_ticket(ch, message.author, message)
                     return
 
+        categories = cfg.get_categories()
+        if not categories:
+            with contextlib.suppress(discord.HTTPException):
+                await message.author.send(
+                    "Le systeme de tickets n'est pas encore configure. "
+                    "Un administrateur doit d'abord configurer les categories."
+                )
+            return
+
         await self._send_ticket_creation_panel(message)
 
     async def _send_ticket_creation_panel(self, message: discord.Message):