How to limit the bot/command to a certain channel?-CodePudding

I want to make a rickroll bot for my server. I already have code to rickroll but I want to limit it to a channel so it doesn't spam. I already have the ID of the channel. I have this so far:

import discord
from discord.ext import commands
client = commands.Bot(command_prefix="!")
@client.event
async def on_ready():
    print("The bot is online")

@client.command()
async def rickroll(ctx):
    await ctx.channel.purge(limit=1)
    await ctx.send('''Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you''')

@client.command()
async def rickdott(ctx):
    await ctx.channel.purge(limit=1)
    await ctx.send('''⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣶⣿⣿⣿⣿⣿⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
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⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀
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⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢹⣿⣵⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣯⡁⠀⠀''')

client.run("never-gonna-give-this-up")

CodePudding user response：

This answer's a slight an improvement from the comments (Add if ctx.channel.id == 123: within the commands).

If you want your entire bot to be limited to a single channel, check within the on_message handler. Otherwise, the simplest solution would be create a discord.py "check" for commands.

Option 1 (entire bot):

async def on_message(message):
    if message.channel.id != 738343649850412345:
        # handle if it's in the wrong channel here, or don't
        return
    await client.process_commands(message)

client.on_message = on_message

Note that this isn't registered as an event, instead it overrides the method (It's probably cleaner if you subclass Bot instead).

Option 2 (specific commands):

def my_channel_only():
    def predicate(ctx):
        if ctx.channel != 738343649850412345:
            # Do the handling here or in on_command_error handler
            raise commands.CheckFailure("Channel isn't valid!")
        return True

    return commands.check(predicate)


@my_channel_only()
@client.command()
async def rickroll(ctx):
    await ctx.send('''Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you''')

Choose whichever option best fit your use case.