Huljo / MowItNow

"use strict";

var fs = require('fs');

// Expose `Config`

module.exports = Config;

/**

 * Set up Config with `configPath`

 * which is responsible for loading and parsing config file.

 *

 * @param {Object} configPath

 * @return {Object}

 * @api public

 */

function Config(configPath) {

    this.configPath = configPath; // Save config file path

    this.raw = readFile(this.configPath); // Save config string

    this.parsed = parseConfig(this.raw); // Config as an object

    return this.parsed; // return as an object

}

/**

 * Read config file and return output

 *

 * @param {String} configPath

 * @return {String}

 * @api protected

 */

function readFile(configPath) {

    try {

        return fs.readFileSync(configPath, "utf-8");

    }

    catch (err) {

        throw err;

    }

}

/**

 * Return configuration file's content as a formatted object

 *

 * @param {String} configStr

 * @return {Object}

 * @api protected

 */

function parseConfig(configStr) {

    var config = {};

    var lines = configStr.split(/\r?\n/); // Split lines

    var lastCellLine = lines[0].split(' '); // Save first line

    var mowersLines = lines.splice(1, lines.length-1); // Array of mowers

    config.topRightPos = {x:parseInt(lastCellLine[0]), y:parseInt(lastCellLine[1])}; // Define first line in config object

    config.mowers = [];

    for(var i=0; i<mowersLines.length; i++) {

        if(i%2){

            var position = mowersLines[i-1].split(' ');

            config.mowers.push({

                pos:{x:parseInt(position[0]), y:parseInt(position[1])},

                cardinal:position[2],

                instructions:mowersLines[i].split('')

            });

        }

    }

    return config;

}