yoanm / alfred-personal-assistant

server/config.js

var fs      = require('fs');

var extend  = require('extend');

var express = require('express');

var request = require('request');


// ------------------------------------------

//  CONSTRUCTOR

// ------------------------------------------


var init = function(){

  info('Starting ConfigManager ...');

  

  // Load properties

  load();

  

  // Configure proxy

  if (Config.http.proxy){

    request.defaults({'proxy': Config.http.proxy})

  }

  

  // Expose properties to global

  global.Config = Config;

  

  return ConfigManager;

}


// ------------------------------------------

//  CONFIG

// ------------------------------------------

var path   = require('path');

var ROOT   = path.normalize(__dirname+'/..');


var SERVER = path.normalize(ROOT+'/server/server.prop');

var PLUGIN = process.env.PLUGINS_PATH || path.normalize(ROOT+'/../../plugins');

var VIEW   = path.normalize(ROOT+'/webapp/views');

var CUSTOM = path.normalize(ROOT+'/data/custom.prop');


info('ROOT', ROOT, '\nSERVER', SERVER, '\nPLUGIN', PLUGIN);


info('NODE_PATH', module.paths);


var Config = { 'debug' : false };

var load = function(){

  try { 

    extend(true, Config, loadProperties());

    extend(true, Config, loadPlugins());

    extend(true, Config, loadCustoms());

    Config.bot.version = "4.0";

  } 

  catch(ex) { error('Error while loading properties: %s', ex.message);  }

  return ConfigManager;

}


/**

 * Load default properties

 */

var loadProperties = function(){

  if (!fs.existsSync(SERVER)) { return {}; }

  info('Loading server properties...', SERVER);

  var json = fs.readFileSync(SERVER, 'utf8');

  return JSON.parse(json);

}


/**

 * Load plugin properties recursively

 */

var loadPlugins = function(folder, json){ 

  var json   = json   || {};

  var folder = folder || PLUGIN;


  if (!fs.existsSync(folder)) { return json; }  

  fs.readdirSync(folder).forEach(function(file){

    var path = folder+'/'+file;

    

    // Directory

    if (fs.statSync(path).isDirectory()){

      loadPlugins(path, json);

      return json;

    }

    

    // Ends with .prop

    if (file.endsWith('.prop')){

      info('Loading plugin properties... %s', path);

      try {

        var load   =  fs.readFileSync(path,'utf8');

        var plugin = JSON.parse(load);

        extend(true, json, plugin);

      } catch(ex){ error('Error in %s: %s', file, ex.message); }

    }

  });

  return json;

}


/**

 * Load custom properties

 */

var loadCustoms = function(){

  if (!fs.existsSync(CUSTOM)) { warn("Can't load custom properties !", CUSTOM); return {}; }

  info('Loading custom properties...', CUSTOM);

  

  var load = fs.readFileSync(CUSTOM,'utf8');

  var json = {}; 

  try { json = JSON.parse(load); } catch (ex){ error('Error in custom.prop: %s', ex.message); }

  

  json['modules']  = retains(json['modules'],  Config['modules']);

  json['phantoms'] = retains(json['phantoms'], Config['phantoms']);

  json['cron']     = retains(json['cron'],     Config['cron']);


  return json;

}


var retains = function(source, target){

  if (typeof source != 'object') return source;

Curly braces around statements make for more readable code and help prevent bugs when you add further statements.

  

  var clean  = {};

  Object.keys(source).forEach(function(attr){

    if (attr == 'description' || attr == 'version'){ return false; }

    if (target[attr] === undefined

        && attr != 'x' && attr != 'y' 

        && attr != 'w' && attr != 'h'

        && attr != 'c' && attr != 'disabled'){ return warn('Skip config: %s', attr); }

    clean[attr] = retains(source[attr], target[attr]);

  });

  

  return clean;

}


/**

 * Load plugin properties file

 */

var loadJSON = function(name){

  var path = PLUGIN+'/'+name+'/'+name+'.prop';

  if (!fs.existsSync(path)){ return {}; }

  info('Loading plugin properties... %s', path);

  try {

    var json = fs.readFileSync(path,'utf8');

    return JSON.parse(json);

  } catch(ex){ error('Error in %s: %s', name+'.prop', ex.message); }

}


// ------------------------------------------

//  SAVE

// ------------------------------------------


var setProperty = function(keys, value, json){

  var config = json || Config;

  var keys = keys.split('.');

  for (var k in keys){

    var key = keys[k];

    if (typeof config[key] === 'object' ){

      config = config[key];

    } else {

      config[key] = value;

    }

  }

}


var save = function(cfg) {

  try {

    Config = cfg || Config;

    var json = JSON.stringify(Config, undefined, 2);


    //json = json.replace(/\{/g,"{\n  ").replace(/\}/g,"\n  }").replace(/,/g,",\n  ");

    fs.writeFileSync(CUSTOM, json, 'utf8');

    info('Properties saved successfully');

  } catch(ex) {

    error('Error while saving properties: %s', ex.message);

  }

}


// ------------------------------------------

//  ROUTER

// ------------------------------------------



var Router = express.Router();


Router.get('/portal/config', function(req, res, next) {

  res.render('portal/config.ejs');

});


Router.post('/portal/config', function(req, res, next) {

  var keys    = Object.keys(req.body);

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

    var key   = keys[i];

    var value = Helper.parse(req.body[key]);

    setProperty(key, value);

  }

  SARAH.ConfigManager.save();

  res.redirect('/portal/config');

});


// ------------------------------------------

//  PUBLIC

// ------------------------------------------


var ConfigManager = {

  'init'   : init,

  'load'   : load,

  'save'   : save,

  

  'loadJSON' : loadJSON,

  'getConfig': function(){ warn('getConfig is deprecated for SARAH 4.x, use global Config'); return Config; },

  'Router' : Router,

  'Config' : Config,

  'PLUGIN' : PLUGIN,

  'ROOT'   : ROOT,

  'VIEW'   : VIEW

}


// Exports Manager

exports.init = ConfigManager.init;