<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */

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

/**
 * System Initialization File
 *
 * Loads the base classes and executes the request.
 *
 * @package		CodeIgniter
 * @subpackage	codeigniter
 * @category	Front-controller
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/
 */

/**
 * CodeIgniter Version
 *
 * @var string
 *
 */
    define('CI_VERSION', '2.1.4');

/**
 * CodeIgniter Branch (Core = TRUE, Reactor = FALSE)
 *
 * @var boolean
 *
 */
    define('CI_CORE', FALSE);

/*
 * ------------------------------------------------------
 *  Load the global functions
 * ------------------------------------------------------
 */
    require(BASEPATH.'core/Common.php');

/*
 * ------------------------------------------------------
 *  Load the framework constants
 * ------------------------------------------------------
 */
if (defined('ENVIRONMENT') AND file_exists(APPPATH.'config/'.ENVIRONMENT.'/constants.php'))
{
        require(APPPATH.'config/'.ENVIRONMENT.'/constants.php');
}
else
{
        require(APPPATH.'config/constants.php');
}

/*
 * ------------------------------------------------------
 *  Define a custom error handler so we can log PHP errors
 * ------------------------------------------------------
 */
set_error_handler('_exception_handler');

if ( ! is_php('5.3'))
{
        @set_magic_quotes_runtime(0); // Kill magic quotes
}

/*
 * ------------------------------------------------------
 *  Set the subclass_prefix
 * ------------------------------------------------------
 *
 * Normally the "subclass_prefix" is set in the config file.
 * The subclass prefix allows CI to know if a core class is
 * being extended via a library in the local application
 * "libraries" folder. Since CI allows config items to be
 * overriden via data set in the main index. php file,
 * before proceeding we need to know if a subclass_prefix
 * override exists.  If so, we will set this value now,
 * before any classes are loaded
 * Note: Since the config file data is cached it doesn't
 * hurt to load it here.
 */
if (isset($assign_to_config['subclass_prefix']) AND $assign_to_config['subclass_prefix'] != '')
{
        get_config(array('subclass_prefix' => $assign_to_config['subclass_prefix']));
}

/*
 * ------------------------------------------------------
 *  Set a liberal script execution time limit
 * ------------------------------------------------------
 */
if (function_exists("set_time_limit") == TRUE AND @ini_get("safe_mode") == 0)
{
        @set_time_limit(300);
}

/*
 * ------------------------------------------------------
 *  Start the timer... tick tock tick tock...
 * ------------------------------------------------------
 */
$BM =& load_class('Benchmark', 'core');
$BM->mark('total_execution_time_start');
$BM->mark('loading_time:_base_classes_start');

/*
 * ------------------------------------------------------
 *  Instantiate the hooks class
 * ------------------------------------------------------
 */
$EXT =& load_class('Hooks', 'core');

/*
 * ------------------------------------------------------
 *  Is there a "pre_system" hook?
 * ------------------------------------------------------
 */
$EXT->_call_hook('pre_system');

/*
 * ------------------------------------------------------
 *  Instantiate the config class
 * ------------------------------------------------------
 */
$CFG =& load_class('Config', 'core');

// Do we have any manually set config items in the index.php file?
if (isset($assign_to_config))
{
        $CFG->_assign_to_config($assign_to_config);
}

/*
 * ------------------------------------------------------
 *  Instantiate the UTF-8 class
 * ------------------------------------------------------
 *
 * Note: Order here is rather important as the UTF-8
 * class needs to be used very early on, but it cannot
 * properly determine if UTf-8 can be supported until
 * after the Config class is instantiated.
 *
 */

$UNI =& load_class('Utf8', 'core');

/*
 * ------------------------------------------------------
 *  Instantiate the URI class
 * ------------------------------------------------------
*/
$URI =& load_class('URI', 'core');

/*
 * ------------------------------------------------------
 *  Instantiate the routing class and set the routing
 * ------------------------------------------------------
 */
$RTR =& load_class('Router', 'core');
$RTR->_set_routing();

// Set any routing overrides that may exist in the main index file
if (isset($routing))
{
        $RTR->_set_overrides($routing);
}

/*
 * ------------------------------------------------------
 *  Instantiate the output class
 * ------------------------------------------------------
 */
$OUT =& load_class('Output', 'core');

/*
 * ------------------------------------------------------
 *	Is there a valid cache file?  If so, we're done...
 * ------------------------------------------------------
 */
if ($EXT->_call_hook('cache_override') === FALSE)
{
        if ($OUT->_display_cache($CFG, $URI) == TRUE)
        {
                exit;
        }
}

/*
 * -----------------------------------------------------
 * Load the security class for xss and csrf support
 * -----------------------------------------------------
 */
$SEC =& load_class('Security', 'core');

/*
 * ------------------------------------------------------
 *  Load the Input class and sanitize globals
 * ------------------------------------------------------
 */
$IN	=& load_class('Input', 'core');

/*
 * ------------------------------------------------------
 *  Load the Language class
 * ------------------------------------------------------
 */
$LANG =& load_class('Lang', 'core');

/*
 * ------------------------------------------------------
 *  Load the app controller and local controller
 * ------------------------------------------------------
 *
 */
// Load the base controller class
require BASEPATH.'core/Controller.php';

function &get_instance()
{
        return CI_Controller::get_instance();
}

if (file_exists(APPPATH.'core/'.$CFG->config['subclass_prefix'].'Controller.php'))
{       
        require APPPATH.'core/'.$CFG->config['subclass_prefix'].'Controller.php';
}

// Load the local application controller
// Note: The Router class automatically validates the controller path using the router->_validate_request().
// If this include fails it means that the default controller in the Routes.php file is not resolving to something valid.
if ( ! file_exists(APPPATH.'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().'.php'))
{
        show_error('Unable to load your default controller. Please make sure the controller specified in your Routes.php file is valid.');
}

include(APPPATH.'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().'.php');

// Set a mark point for benchmarking
$BM->mark('loading_time:_base_classes_end');

/*
* ------------------------------------------------------
 *  Security check
 * ------------------------------------------------------
 *
 *  None of the functions in the app controller or the
 *  loader class can be called via the URI, nor can
 *  controller functions that begin with an underscore
 */
$class  = $RTR->fetch_class();
$method = $RTR->fetch_method();

if ( ! class_exists($class)
        OR strncmp($method, '_', 1) == 0
        OR in_array(strtolower($method), array_map('strtolower', get_class_methods('CI_Controller')))
        )
{
        if ( ! empty($RTR->routes['404_override']))
        {
                $x = explode('/', $RTR->routes['404_override']);
                $class = $x[0];
                $method = (isset($x[1]) ? $x[1] : 'index');
                if ( ! class_exists($class))
                {
                        if ( ! file_exists(APPPATH.'controllers/'.$class.'.php'))
                        {
                                show_404("{$class}/{$method}");
                        }

                        include_once(APPPATH.'controllers/'.$class.'.php');
                }
        }
        else
        {
                show_404("{$class}/{$method}");
        }
}

/*
 * ------------------------------------------------------
 *  Is there a "pre_controller" hook?
 * ------------------------------------------------------
 */
	$EXT->_call_hook('pre_controller');

/*
 * ------------------------------------------------------
 *  Instantiate the requested controller
 * ------------------------------------------------------
 */
// Mark a start point so we can benchmark the controller
$BM->mark('controller_execution_time_( '.$class.' / '.$method.' )_start');

$CI = new $class();

/*
 * ------------------------------------------------------
 *  Is there a "post_controller_constructor" hook?
 * ------------------------------------------------------
 */
$EXT->_call_hook('post_controller_constructor');

/*
 * ------------------------------------------------------
 *  Call the requested method
 * ------------------------------------------------------
 */
// Is there a "remap" function? If so, we call it instead
if (method_exists($CI, '_remap'))
{
        $CI->_remap($method, array_slice($URI->rsegments, 2));
}
else
{
    // is_callable() returns TRUE on some versions of PHP 5 for private and protected
    // methods, so we'll use this workaround for consistent behavior
    if ( ! in_array(strtolower($method), array_map('strtolower', get_class_methods($CI))))
    {
            // Check and see if we are using a 404 override and use it.
            if ( ! empty($RTR->routes['404_override']))
            {
                    $x = explode('/', $RTR->routes['404_override']);
                    $class = $x[0];
                    $method = (isset($x[1]) ? $x[1] : 'index');
                    if ( ! class_exists($class))
                    {
                            if ( ! file_exists(APPPATH.'controllers/'.$class.'.php'))
                            {
                                    show_404("{$class}/{$method}");
                            }

                            include_once(APPPATH.'controllers/'.$class.'.php');
                            unset($CI);
                            $CI = new $class();
                    }
            }
            else
            {
                    show_404("{$class}/{$method}");
            }
    }

    // Call the requested method.
    // Any URI segments present (besides the class/function) will be passed to the method for convenience
    call_user_func_array(array(&$CI, $method), array_slice($URI->rsegments, 2));
}


// Mark a benchmark end point
$BM->mark('controller_execution_time_( '.$class.' / '.$method.' )_end');

/*
 * ------------------------------------------------------
 *  Is there a "post_controller" hook?
 * ------------------------------------------------------
 */
$EXT->_call_hook('post_controller');

/*
 * ------------------------------------------------------
 *  Send the final rendered output to the browser
 * ------------------------------------------------------
 */
if ($EXT->_call_hook('display_override') === FALSE)
{
        $OUT->_display();
}

/*
 * ------------------------------------------------------
 *  Is there a "post_system" hook?
 * ------------------------------------------------------
 */
$EXT->_call_hook('post_system');

/*
 * ------------------------------------------------------
 *  Close the DB connection if one exists
 * ------------------------------------------------------
 */
if (class_exists('CI_DB') AND isset($CI->db))
{
        $CI->db->close();
}


/* End of file CodeIgniter.php */
/* Location: ./system/core/CodeIgniter.php */