techno-express/node-7z

'use strict';

/**
 * Transform an object of options into an array that can be passed to the
 * spawned child process.
 * @param  {Object} switches An object of options
 * @return {array} Array to pass to the `run` function.
 */
export default function (switches) {

    // Default value for switches
    switches = switches || {};

    var a = [];
    // Set default values of boolean switches
    switches.so = (switches.so === true) ? true : false;
    switches.spl = (switches.spl === true) ? true : false;
    switches.ssc = (switches.ssc === false) ? false : true;
    switches.ssw = (switches.ssw === true) ? true : false;
    switches.y = (switches.y === false) ? false : true;

    var s;
    /*jshint forin:false*/
    for (s in switches) {

        // Switches that are set or not. Just add them to the array if they are
        // present. Differ the `ssc` switch treatment to later in the function.
        if (switches[s] === true && s !== 'ssc') {
            a.push('-' + s);
        }

        // Switches with a value. Detect if the value contains a space. If it does
        // wrap the value with double quotes. Else just add the switch and its value
        // to the string. Doubles quotes are used for parsing with a RegExp later.
        if (typeof switches[s] !== 'boolean') {

            // Special treatment for wilcards
            if (s === 'wildcards') {
                a.unshift(switches.wildcards);
            }

            // Allow raw switches to be added to the command, repeating switches like
            // -i is not possible otherwise.
            else if (s === 'raw') {
                switches.raw.forEach(function (rawValue) {
                    a.push(rawValue);
                });
            }

            else if (switches[s].indexOf(' ') === -1) {
                a.push('-' + s + switches[s]);
            }

            else {
                a.push('-' + s + '"' + switches[s] + '"');
            }
        }

        // Special treatment for `-ssc`
        if (s === 'ssc') {
            a.push((switches.ssc === true) ? '-ssc' : '-ssc-');
        }

    }

    return a;

};