handle mentions in collage

commands/collage.py

@@ -33,6 +33,18 @@ def setup(bot: bot.Bot):
                 print("returned")
                 return
 
+        if username.startswith("[@:"):
+                mentioned = bot.get_user(username[3:-1])
+                try: username = await bot.get_lastfm(mentioned.id)
+                except Exception as e:
+                    print(e)
+                    await ctx.send(u.error_msg(f"Unknown database error:\n{e}"))
+
+                if not username:
+                    await ctx.send(u.error_msg(f"[@:{mentioned.id}] doesn't seem to have an account set. Do so with `/setfm`."))
+                    print("returned")
+                    return
+
         match timeframe:
             case "a" | "all" | "alltime" | "o" | "overall": timeframe = "overall"
             case "y" | "year" | "yearly": timeframe = "12month"