shortener-url/src/index.js

A string shortener using promises

class urlShort {
    constructor() { }

    static short(url) {
        return new Promise((resolver, reject) => {
            if (url) {
                let h = 0
                let l = url.length
                let i = 0
                if (l > 0) while (i < l) h = ((h << 5) - h + url.charCodeAt(i++)) | 0;
                //resolver(h < 0 ? h * -1 : h).toString(58);
                resolver((h < 0 ? h * -1 : h).toString(36))
            } else {
                reject(new Error("Invalid param received !"))
            }
        })
    }
}

module.exports = urlShort