<?php
/* SVN FILE: $Id$ */

/**
 * Short description for file.
 *
 * Long description for file
 *
 * PHP versions 4 and 5
 *
 * CakePHP :  Rapid Development Framework <http://www.cakephp.org/>
 * Copyright (c) 2006, Cake Software Foundation, Inc.
 *                     1785 E. Sahara Avenue, Suite 490-204
 *                     Las Vegas, Nevada 89104
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright    Copyright (c) 2006, Cake Software Foundation, Inc.
 * @link         http://www.cakefoundation.org/projects/info/cakephp CakePHP Project
 * @package      cake
 * @subpackage   cake.cake.libs.view.helpers
 * @since        CakePHP v 1.0.0.2277
 * @version      $Revision$
 * @modifiedby   $LastChangedBy$
 * @lastmodified $Date$
 * @license      http://www.opensource.org/licenses/mit-license.php The MIT License
 */


/**
 * Short description for file.
 *
 * Long description for file
 *
 * @package    cake
 * @subpackage cake.cake.libs.view.helpers
 * @since      CakePHP v 1.0.0.2277
 *
 */
class CacheHelper extends Helper
{
/**
 * Array of strings replaced in cached views.
 * The strings are found between <cake:nocache><cake:nocache> in views
 *
 * @var array
 */
    var $replace = array();
/**
 * Array of string that are replace with there var replace above.
 * The strings are any content inside <cake:nocache><cake:nocache> and includes the tags in views
 *
 * @var array
 */
    var $match = array();
/**
 * holds the View object passed in final call to CacheHelper::cache()
 *
 * @var object
 */
    var $view;

/**
 * Enter description here...
 *
 * @param string $file
 * @param string $out
 * @param string $cache
 * @return view ouput
 */
    function cache($file, $out, $cache = false)
    {
        if(is_array($this->cacheAction))
        {
            $check = str_replace('/', '_', $this->here);
            $replace = str_replace('/', '_', $this->base);
            $match =  str_replace($this->base, '', $this->here);
            $match = str_replace('//', '/', $match);
            $match = str_replace('/'.$this->controllerName.'/', '', $match);
            $check = str_replace($replace, '', $check);
            $check = str_replace('_'.$this->controllerName.'_', '', $check);
            $check = convertSlash($check);
            $keys = str_replace('/', '_', array_keys($this->cacheAction));
            $found = array_keys($this->cacheAction);
            $index = null;
            $count = 0;
            foreach ($keys as $key => $value)
            {
                if(strpos($check, $value) === 0)
                {
                    $index = $found[$count];
                    break;
                }
                $count++;
            }
            if(isset($index))
            {
                $pos1 = strrpos($match, '/');
                $char = strlen($match) -1;
                if($pos1 == $char)
                {
                    $match = substr($match, 0, $char);
                }
                $key = $match;
            }
            elseif ($this->action == 'index')
            {
                $index = 'index';
            }

            if(isset($this->cacheAction[$index]))
            {
                $cacheTime = $this->cacheAction[$index];
            }
            else
            {
                $cacheTime = 0;
            }
        }
        else
        {
            $cacheTime = $this->cacheAction;
        }
        if($cacheTime != '' && $cacheTime > 0)
        {
            $this->__parseFile($file, $out);

            if($cache === true)
            {
                $cached = $this->__parseOutput($out);
                $this->__writeFile($cached, $cacheTime);
            }
            return $out;
        }
        else
        {
            return $out;
        }
    }


/**
 * Enter description here...
 *
 * @param string $file
 * @param boolean $cache
 */
    function __parseFile($file, $cache)
    {
        if(is_file($file))
        {
            $file = file_get_contents($file);
        }
        else if($file = fileExistsInPath($file))
        {
            $file = file_get_contents($file);
        }

        preg_match_all('/(<cake:nocache>(?<=<cake:nocache>)[\\s\\S]*?(?=<\/cake:nocache>)<\/cake:nocache>)/i', $cache, $oresult, PREG_PATTERN_ORDER);
        preg_match_all('/(?<=<cake:nocache>)([\\s\\S]*?)(?=<\/cake:nocache>)/i', $file, $result, PREG_PATTERN_ORDER);

        if(!empty($result['0']))
        {
            $count = 0;
            foreach($result['0'] as $result)
            {
                if(isset($oresult['0'][$count]))
                {
                    $this->replace[] = $result;
                    $this->match[] = $oresult['0'][$count];
                }
                $count++;
            }
        }
    }

/**
 * Enter description here...
 *
 * @param sting $cache
 * @return string with all replacements made to <cake:nocache><cake:nocache>
 */
    function __parseOutput($cache)
    {
        $count = 0;
        if(!empty($this->match))
        {
            foreach($this->match as $found)
            {
                $cache = str_replace($found, $this->replace[$count], $cache);
                $count++;
            }
            return $cache;
        }
        return $cache;
    }

/**
 * Enter description here...
 *
 * @param string $file
 * @param sting $timestamp
 * @return cached view
 */
    function __writeFile($file, $timestamp)
    {
        $now = time();
        if (is_numeric($timestamp))
        {
            $cacheTime = $now + $timestamp;
        }
        else
        {
            $cacheTime = $now + strtotime($timestamp);
        }
        $cache = convertSlash($this->here).'.php';

        $file = '<!--cachetime:'.$cacheTime.'-->
                 <?php
                    loadController(\''. $this->view->name .'\');
                    $this->controller = new '. $this->view->name .'Controller();
                    $this->helpers = unserialize(\''. serialize($this->view->helpers) .'\');
                    $this->base =  \''. $this->view->base .'\';
                    $this->webroot = \''. $this->view->webroot.'\';
                    $this->here = \''. $this->view->here .'\';
                    $this->params = unserialize(\''. serialize($this->view->params) .'\');
                    $this->action = unserialize(\''. serialize($this->view->action) .'\');
                    $this->data  = unserialize(\''. serialize($this->view->data) .'\');
                    $this->themeWeb = \''. $this->view->themeWeb .'\';
                    $this->plugin = \''. $this->view->plugin .'\';
                    $loadedHelpers =  array();
                    $loadedHelpers = $this->_loadHelpers($loadedHelpers, $this->helpers);
                    foreach(array_keys($loadedHelpers) as $helper)
                    {
                        $replace = strtolower(substr($helper, 0, 1));
                        $camelBackedHelper = preg_replace(\'/\\w/\', $replace, $helper, 1);
                        ${$camelBackedHelper} =& $loadedHelpers[$helper];

                        if(isset(${$camelBackedHelper}->helpers) && is_array(${$camelBackedHelper}->helpers))
                        {
                            foreach(${$camelBackedHelper}->helpers as $subHelper)
                            {
                                ${$camelBackedHelper}->{$subHelper} =& $loadedHelpers[$subHelper];
                            }
                        }
                        $this->loaded[$camelBackedHelper] = (${$camelBackedHelper});
                    }
                    ?>
                    '.$file;
        return cache('views'.DS.$cache, $file, $timestamp);
    }
}
?>