index.js

/*
** Class for add params to URL and parse
** Designed for Videsk™
 */

module.exports = class ParamsParser {

    constructor() {
        this.parameters = '?';
        this.arrayParams = [];
    }

    _parse(key, value){
        return { key, value };
    }

    _clean(){
        // Clean all variables
        this.parameters = '?';
        this.arrayParams = [];
    }

    add(key, value) {
        // Add to temp array
        this.arrayParams.push(this._parse(key, value));
    }

    byObj(obj) {
        // Add various key and values through object
        Object.keys(obj).map(key =>
            (Array.isArray(obj[key]))
                ? this.byArray(key, obj[key])
                : this.add(key, obj[key]));
    }

    byArray(key, array) {
        // Add various values with the same key
        array.map(e => this.add(key, e));
    }

    parse() {
        // Add parameters to URL
        this.arrayParams.map((e, i) => {
            this.parameters += `${e.key}=${e.value}`;
            if (i < (this.arrayParams.length - 1)) this.parameters += '&';
        });
        // Add to temp variable
        const temp = this.parameters;
        // Clean all
        this._clean();
        // Return parameters
        return temp;
    }
};