Use message converter for react

Fixes #9

cogs/events.py

@@ -111,11 +111,13 @@ class Events(commands.Cog):
         # Someone used a command that was on cooldown
         elif isinstance(err, commands.CommandOnCooldown):
             await ctx.send("Je kan dit commando niet (meer) spammen.", delete_after=10)
+        elif isinstance(err, commands.MessageNotFound):
+            await ctx.send("Geen message gevonden die overeenkomt met het opgegeven argument.")
+        elif isinstance(err, (commands.ChannelNotFound, commands.ChannelNotReadable)):
+            await ctx.send("Geen channel gevonden dat overeenkomt met het opgegeven argument.")
         # Someone forgot an argument or passed an invalid argument
         elif isinstance(err, (commands.BadArgument, commands.MissingRequiredArgument)):
             await ctx.send("Controleer je argumenten.")
-        elif isinstance(err, commands.MessageNotFound):
-            await ctx.send("Geen bericht gevonden dat overeenkomt met het opgegeven argument.")
         else:
             # Remove the InvokeCommandError because it's useless information
             x = traceback.format_exception(type(err), err, err.__traceback__)

cogs/reactword.py

@@ -19,25 +19,16 @@ class ReactWord(commands.Cog):
     @help.Category(category=Category.Other)
     async def react(self, ctx, *words):
         words = list(words)
+        message = ctx.message
         target = False
-        channel = ctx.channel
 
-        # Check if the URL or the Id was passed
-        if str(words[-1]).count("/") > 3:
-            spl = str(words[-1]).split("/")
-            channel = self.client.get_channel(int(spl[-2]))
-            if channel is None:
-                return await ctx.send("Ik kan geen kanaal zien met dit id.")
-            words[-1] = spl[-1]
-
-        # Get the message object if an Id was passed, otherwise react to the message itself
-        try:
-            message = await channel.fetch_message(words[-1])
-            if message is None:
-                return await ctx.send("Ik kan geen bericht zien met dit id.")
+        # Message id or URL passed as final argument
+        if (len(words[-1]) == 18 and all(i.isdigit() for i in words[-1])) or "discord.com/channels/" in words[-1]:
             target = True
-        except discord.HTTPException:
-            message = ctx.message
+            message = await commands.MessageConverter().convert(ctx, words[-1])
+
+            # Cut id or URL
+            words = words[:-1]
 
         # Reactions that were added before this command was executed
         previousReactions = ([x.emoji for x in message.reactions]) if len(message.reactions) != 0 else []