// application/core/MY_Controller.php
<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/**
 * 控制器扩展类
 *
 * 示例:
 * ```
 * $this->input->get('name');
 * ```
 *
 * @property CI_Benchmark $benchmark
 * @property CI_Config $config
 * @property MY_DB_active_record $db
 * @property CI_Exceptions $error
 * @property CI_Hooks $hooks
 * @property CI_Input $input
 * @property CI_Lang $lang
 * @property MY_Loader $load
 * @property MY_Output $output
 * @property CI_Router $router
 * @property CI_Security $security
 * @property CI_URI $uri
 * @property CI_Utf8 $utf8
 * @property CI_Smarty $smarty
 */
class MY_Controller extends CI_Controller
{
    /**
     * @var array 核心类
     */
    protected $core_classes = [
        'benchmark', 'common', 'config', 'controller', 'error' => 'exceptions', 'hooks',
        'input', 'lang', 'load' => 'loader', 'output', 'router', 'security', 'uri', 'utf8',
    ];
    /**
     * @var array helper
     */
    protected $helper_classes = [
        'calendar', 'cart', 'calendar', 'cart', 'driver', 'email', 'encrypt', 'form_validation', 'ftp',
        'image_lib', 'index.html', 'javascript', 'log', 'migration', 'pagination', 'parser', 'profiler',
        'session', 'sha1', 'table', 'trackback', 'typography', 'unit_test', 'upload', 'user_agent',
        'xmlrpc', 'xmlrpcs', 'zip',
    ];

    protected $model = [
        'user_model',
    ];

    /**
     * @inheritDoc
     */
    public function __construct($autoload = true)
    {
        parent::__construct(false);

		$this->load = load_class('Loader', 'core');

		$this->load->initialize();
    }

    /**
     * 根据属性名自动加载类
     *
     * 找不到属性时方法才会被调用
     *
     * @param string $name 属性名
     * @return mixed
     */
    function __get($name)
    {
        if ('db' == $name) {
            $this->load->database();
        } else {
            if (isset($this->core_classes[$name])) {
                $className = ucfirst($this->core_classes[$name]);
            } else {
                $className = ucfirst($name);
            }

            if (in_array($name, $this->helper_classes)) {
                $this->load->library($className);
            } elseif (in_array($name, $this->model)) {
                $this->load->model($className, $name);
            } else {
                $this->$name =&amp; load_class($className, isset($this->core_classes[$name]) || in_array($name, $this->core_classes) ? 'core' : 'libraries');
            }
        }

//        $backtrace = debug_backtrace();
//        if (!empty($backtrace[0])) {
//            if (!property_exists($this, 'exceptions')) {
//                $this->error = load_class('Exceptions', 'core');
//            }
//            return $this->error->show_php_error('Error', 'Undefined property: '.get_called_class().'::$'.$name, $backtrace[0]['file'], $backtrace[0]['line']);
//        }

        return $this->$name;
    }
}