consolecurrencyconverter/index.ts

Console app currency converter

#!/usr/bin/env node
import inquirer from 'inquirer';

// create currency converter command line

const rates: any = {
    USD: 1,
    EUR: 0.85,
    GBP: 0.75,
    JPY: 110.32,
    NGN: 411.33
};

const questions = [
    {
        type: 'input',
        name: 'amount',
        message: 'Enter amount to convert'
    },
    {
        type: 'list',
        name: 'from',
        message: 'From currency',
        choices: ['USD', 'EUR', 'GBP', 'JPY', 'NGN']
    },
    {
        type: 'list',
        name: 'to',
        message: 'To currency',
        choices: ['USD', 'EUR', 'GBP', 'JPY', 'NGN']
    },
    {
        type: 'list',
        name: 'command',
        message: 'What do you want to do?',
        choices: ['Convert', 'Exit']
    }
]
function convert(amount: number, from: string, to: string) {
    const convertedAmount = (amount * rates[from]) / rates[to];
    return convertedAmount;
}

function init() {
    inquirer.prompt(questions)
        .then(answers => {
            if (answers.command === 'Convert') {
                console.log(convert(answers.amount, answers.from, answers.to));
                init();
            }
        })
        .catch(error => {
            console.log(error);
        });
}

init();