<?php

/*

  Belokan Micro Framework

  Licensed under GNU GPL

  http://gitorious.org/belokan

  ---

  Belokan/Config.php:

  Configuration manager

*/

class Belokan_Config {

  private static

    $_instance,

    $_config;

  public static function getInstance ()

  {

    if (self::$_instance === null)

      self::$_instance = new self;

    return self::$_instance;

  }

  public function __construct ()

  {

    $this->_config['path'] = '';

    $this->_config['dir'] = array(

      'controllers' => '../controllers/',

      'models' => '../models/',

      'views' => '../views/',

      'langs' => '../langs/',

      'logs' => '../logs/'

    );

    $this->_config['log'] = array(

      'autosave' => true,

      'belokan' => true

    );

    $this->_config['format'] = array(

      'enabled' => true,

      'default' => 'html'

    );

    $this->_config['intl'] = array(

      'enabled' => false,

      'default' => 'en'

    );

  }

  public function loadFile ($config_file=null)

  {

    if (!file_exists($config_file)) {

      if (Belokan_Config::getInstance()->get('log', 'belokan'))

        Belokan_Log::getInstance()->add('Belokan', 'ERROR: configuration file not found ('.$config_file.').');

      return false;

    }

    $userConfig = include $config_file;

    $this->merge($userConfig);

    return true;

  }

  public function set ($val, $group, $key=null)

  {

    if ($key != null) $this->_config[$group][$key] = $val;

    else $this->_config[$group] = $val;

  }

  public function get ($group, $key=null)

  {

    if (!$this->exists($group, $key)) return null;

    if ($key != null) return $this->_config[$group][$key];

    return $this->_config[$group];

  }

  public function exists ($group, $key=null)

  {

    if ($key != null) return isset($this->_config[$group][$key]);

    return isset($this->_config[$group]);

  }

  private function merge ($user_config)

  {

    foreach ($user_config as $group => $config) {

      if (array_key_exists($group, $this->_config) && is_array($config))

        $this->_config[$group] = array_merge($this->_config[$group], $config);

      else

        $this->_config[$group] = $config;

    }

  }

}