xiao/commands/textedit/romaji.js

const { Command } = require('discord.js-commando');
const hepburn = require('hepburn');

module.exports = class RomajiCommand extends Command {
    constructor(client) {
        super(client, {
            name: 'romaji',
            aliases: [
                'romajify'
            ],
            group: 'textedit',
            memberName: 'romaji',
            description: 'Convert Hiragana and Katakana to Romaji (;romaji ひらがな)',
            examples: [';romaji ひらがな'],
            args: [{
                key: 'kana',
                prompt: 'What kana would you like to convert to romaji?',
                type: 'string',
                validate: kana => {
                    if (hepburn.containsKana(kana)) {
                        if (hepburn.fromKana(kana).length > 1950) {
                            return 'Your message content is too long.';
                        }
                        return true;
                    }
                    return 'Please enter text in either Hiragana or Katakana.';
                }
            }]
        });
    }

    run(message, args) {
        if (message.channel.type !== 'dm') {
            if (!message.channel.permissionsFor(this.client.user).hasPermission(['SEND_MESSAGES', 'READ_MESSAGES'])) return;
        }
        const romajify = args.kana;
        const romajified = hepburn.fromKana(romajify);
        return message.say(romajified);
    }
};