Calculate how true something is

howtrue.js

const crypto = require('crypto');

const truths = [
    'so true',
    'undeniably true',
    'This response is undeniably true;',
    'So true!',
    'This is true;',
    'true',
    'false',
    'Untrue'
];

function sentenceHash (sentence) {
    const symbols = sentence
        .trim()
        .toLowerCase()
        .split('')
        .sort()
        .filter(char => 'abcdefghijklmnopqrstuvwxyz123456789'.split('').includes(char))
        .join('');
    return crypto.createHash('md5').update(symbols + process.env.HOWTRUE_SALT).digest('hex');
}

function howTrue (text) {
    return truths[parseInt(sentenceHash(text).substring(0, 5), 16) % truths.length];
}

module.exports = async function (req, res, [ text ]) {
    res.header('Hash-Output', sentenceHash(text));
    res.send(howTrue(text));
}

howtrue.md

Ever wonder how true something is? Run this script or send a GET request to https://api.yodacode.xyz/howtrue/:text if you want to find out.