xiao/commands/num-edit/currency.js

const Command = require('../../structures/Command');
const snekfetch = require('snekfetch');
const codes = require('../../assets/json/currency');

module.exports = class CurrencyCommand extends Command {
	constructor(client) {
		super(client, {
			name: 'currency',
			group: 'num-edit',
			memberName: 'currency',
			description: 'Converts a number 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 ${to} is the same value, dummy.`);
		const { body } = await snekfetch
			.get('http://api.fixer.io/latest')
			.query({
				base,
				symbols: to
			});
		return msg.say(`${amount} ${base} is ${amount * body.rates[to]} ${to}.`);
	}
};