Discord bot: Command Handler alias for command name

Question

I am working on a Discord bot, and trying to improve my already functioning command handler. I have a folder, and every file is an extra command. I want to expand the system, so I have alias name for the same command, e.g. I want my clearchat command to function with /clearchat or with /cc, but I dont want to create just another file and copy the code. This is what I have:

// I left out the other imports etc.
client.commands = new Discord.Collection();

// Reading commands-folder
const commandFiles = fs.readdirSync("./commands/").filter(file => file.endsWith(".js"));
for (const file of commandFiles) {
    const command = require(`./commands/${file}`);
    client.commands.set(command.name, command); 
}

client.on("message", msg => {

    if (msg.content.startsWith(config.prefix) && !msg.author.bot && msg.guild) {
        const args = msg.content.slice(config.prefix.length).split(" ");
        const command = args.shift().toLowerCase();
        
        if (client.commands.find(f => f.name === command)) {
            client.commands.get(command).execute(client, msg, args);    
        }
    }
});

and then a command file inside the commands-folder:

module.exports = {
    name: "clearchat",
    execute(client, msg, args) {
        if (msg.member.hasPermission("ADMINISTRATOR")) {
              msg.channel.messages.fetch({limit: 99}).then(messages => {
                  msg.channel.bulkDelete(messages);
              });
        }
    }
}

(I know it only deletes 100 messages max, I am fine with that)

I image something in changing a few lines in my client.on("message) function, and just having to write in the clearchat.js file a line like name: ["clearchat", "cc", ...] where I can go writing as much aliases as I want.

Thanks in advance!

I think we have to assume, that every alias/name is used only a single time — pragmatrick
– pragmatrick, Commented Jul 28, 2020 at 17:37

Jakye · Accepted Answer · 2020-07-28 18:59:43Z

4

First, you'll have to create an array with the aliases in your command.

module.exports = {
    name: "clearchat",
    aliases: ["cc"],
    execute(client, msg, args) {
        
    }
}

Then, the same you did with commands, create a Collection for the aliases.

client.aliases = new Discord.Collection()

And finally, bind the alias to the command:

if (command.aliases) {
    command.aliases.forEach(alias => {
        client.aliases.set(alias, command)
    })
}

Now, when you want to execute a command, you'll have to check if it has an alias.

const commandName = "testcommand" // This should be the user's input.
const command = client.commands.get(commandName) || client.aliases.get(commandName); // This will return the command and you can proceed by running the execute method.

fs.readdir(`./commands/`, (error, files) => {
    if (error) {return console.log("Error while trying to get the commmands.");};
    files.forEach(file => {
        const command = require(`./commands/${file}`);
        const commandName = file.split(".")[0];

        client.commands.set(commandName, command);

        if (command.aliases) {
            command.aliases.forEach(alias => {
                client.aliases.set(alias, command);
            });
        };
    });
});

edited Jul 28, 2020 at 18:59

answered Jul 28, 2020 at 18:07

Jakye

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1 Comment

Jakye Over a year ago

You should paste it where you initialize the commands but at the end. So yes, in your for loop. I've updated my answer with an example.

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