xiao/commands/numedit/currency.js

const { Command } = require('discord.js-commando');
const request = require('superagent');
const codes = require('../../assets/json/currency');

module.exports = class CurrencyCommand extends Command {
    constructor(client) {
        super(client, {
            name: 'currency',
            group: 'numedit',
            memberName: 'currency',
            description: 'Converts from one currency to another.',
            details: `**Codes:** ${codes.join(', ')}`,
            args: [
                {
                    key: 'base',
                    prompt: 'What currency code do you want to use as the base?',
                    type: 'string',
                    validate: base => {
                        if (codes.includes(base.toUpperCase())) return true;
                        return  'Invalid Currency Code. Use `help currency` to view a list of currency codes.';
                    },
                    parse: base => base.toUpperCase()
                },
                {
                    key: 'to',
                    prompt: 'What currency code do you want to convert to?',
                    type: 'string',
                    validate: to => {
                        if (codes.includes(to.toUpperCase())) return true;
                        return 'Invalid Currency Code. Use `help currency` to view a list of currency codes.';
                    },
                    parse: to => to.toUpperCase()
                },
                {
                    key: 'amount',
                    prompt: 'How much money should be converted? Do not use symbols.',
                    type: 'integer'
                }
            ]
        });
    }

    async run(msg, args) {
        const { base, to, amount } = args;
        if (base === to) return msg.say(`Converting ${base} to ${to} is the same value, dummy.`);
        try {
            const { body } = await request
                .get(`http://api.fixer.io/latest?base=${base}&symbols=${to}`);
            const rate = body.rates[to];
            return msg.say(`${amount} ${base} is ${amount * rate} ${to}.`);
        } catch (err) {
            return msg.say(err);
        }
    }
};