pictcode

<?php

/**

 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)

 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 *

 * Licensed under The MIT License

 * For full copyright and license information, please see the LICENSE.txt

 * Redistributions of files must retain the above copyright notice.

 *

 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 * @link          http://cakephp.org CakePHP(tm) Project

 * @package       Cake.View.Helper

 * @since         CakePHP(tm) v 1.0.0.2277

 * @license       http://www.opensource.org/licenses/mit-license.php MIT License

 */

App::uses('AppHelper', 'View/Helper');

/**

 * CacheHelper helps create full page view caching.

 *

 * When using CacheHelper you don't call any of its methods, they are all automatically

 * called by View, and use the $cacheAction settings set in the controller.

 *

 * @package Cake.View.Helper

 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/cache.html

 * @deprecated This class will be removed in 3.0. You should use a separate response cache

 * like Varnish instead.

 */

class CacheHelper extends AppHelper {

/**

 * Array of strings replaced in cached views.

 * The strings are found between `<!--nocache--><!--/nocache-->` in views

 *

 * @var array

 */

        protected $_replace = array();

/**

 * Array of string that are replace with there var replace above.

 * The strings are any content inside `<!--nocache--><!--/nocache-->` and includes the tags in views

 *

 * @var array

 */

        protected $_match = array();

/**

 * Counter used for counting nocache section tags.

 *

 * @var int

 */

        protected $_counter = 0;

/**

 * Is CacheHelper enabled? should files + output be parsed.

 *

 * @return bool

 */

        protected function _enabled() {

                return $this->_View->cacheAction && (Configure::read('Cache.check') === true);

        }

/**

 * Parses the view file and stores content for cache file building.

 *

 * @param string $viewFile View file name.

 * @param string $output The output for the file.

 * @return string Updated content.

 */

        public function afterRenderFile($viewFile, $output) {

                if ($this->_enabled()) {

                        return $this->_parseContent($viewFile, $output);

                }

        }

/**

 * Parses the layout file and stores content for cache file building.

 *

 * @param string $layoutFile Layout file name.

 * @return void

 */

        public function afterLayout($layoutFile) {

                if ($this->_enabled()) {

                        $this->_View->output = $this->cache($layoutFile, $this->_View->output);

                }

                $this->_View->output = preg_replace('/<!--\/?nocache-->/', '', $this->_View->output);

        }

/**

 * Parse a file + output. Matches nocache tags between the current output and the current file

 * stores a reference of the file, so the generated can be swapped back with the file contents when

 * writing the cache file.

 *

 * @param string $file The filename to process.

 * @param string $out The output for the file.

 * @return string Updated content.

 */

        protected function _parseContent($file, $out) {

                $out = preg_replace_callback('/<!--nocache-->/', array($this, '_replaceSection'), $out);

                $this->_parseFile($file, $out);

                return $out;

        }

/**

 * Main method used to cache a view

 *

 * @param string $file File to cache

 * @param string $out output to cache

 * @return string view output

 * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/cache.html

 * @throws Exception If debug mode is enabled and writing to cache file fails.

 */

        public function cache($file, $out) {

                $cacheTime = 0;

                $useCallbacks = false;

                $cacheAction = $this->_View->cacheAction;

                if (is_array($cacheAction)) {

                        $keys = array_keys($cacheAction);

                        $index = null;

                        foreach ($keys as $action) {

                                if ($action === $this->request->params['action']) {

                                        $index = $action;

                                        break;

                                }

                        }

                        if (!isset($index) && $this->request->params['action'] === 'index') {

                                $index = 'index';

                        }

                        $options = $cacheAction;

                        if (isset($cacheAction[$index])) {

                                if (is_array($cacheAction[$index])) {

                                        $options = $cacheAction[$index] + array('duration' => 0, 'callbacks' => false);

                                } else {

                                        $cacheTime = $cacheAction[$index];

                                }

                        }

                        if (isset($options['duration'])) {

                                $cacheTime = $options['duration'];

                        }

                        if (isset($options['callbacks'])) {

                                $useCallbacks = $options['callbacks'];

                        }

                } else {

                        $cacheTime = $cacheAction;

                }

                if ($cacheTime && $cacheTime > 0) {

                        $cached = $this->_parseOutput($out);

                        try {

                                $this->_writeFile($cached, $cacheTime, $useCallbacks);

                        } catch (Exception $e) {

                                if (Configure::read('debug')) {

                                        throw $e;

                                }

                                $message = __d(

                                        'cake_dev',

                                        'Unable to write view cache file: "%s" for "%s"',

                                        $e->getMessage(),

                                        $this->request->here

                                );

                                $this->log($message, 'error');

                        }

                        $out = $this->_stripTags($out);

                }

                return $out;

        }

/**

 * Parse file searching for no cache tags

 *

 * @param string $file The filename that needs to be parsed.

 * @param string $cache The cached content

 * @return void

 */

        protected function _parseFile($file, $cache) {

                if (is_file($file)) {

                        $file = file_get_contents($file);

                } elseif ($file = fileExistsInPath($file)) {

                        $file = file_get_contents($file);

                }

                preg_match_all('/(<!--nocache:\d{3}-->(?<=<!--nocache:\d{3}-->)[\\s\\S]*?(?=<!--\/nocache-->)<!--\/nocache-->)/i', $cache, $outputResult, PREG_PATTERN_ORDER);

                preg_match_all('/(?<=<!--nocache-->)([\\s\\S]*?)(?=<!--\/nocache-->)/i', $file, $fileResult, PREG_PATTERN_ORDER);

                $fileResult = $fileResult[0];

                $outputResult = $outputResult[0];

                if (!empty($this->_replace)) {

                        foreach ($outputResult as $i => $element) {

                                $index = array_search($element, $this->_match);

                                if ($index !== false) {

                                        unset($outputResult[$i]);

                                }

                        }

                        $outputResult = array_values($outputResult);

                }

                if (!empty($fileResult)) {

                        $i = 0;

                        foreach ($fileResult as $cacheBlock) {

                                if (isset($outputResult[$i])) {

                                        $this->_replace[] = $cacheBlock;

                                        $this->_match[] = $outputResult[$i];

                                }

                                $i++;

                        }

                }

        }

/**

 * Munges the output from a view with cache tags, and numbers the sections.

 * This helps solve issues with empty/duplicate content.

 *

 * @return string The content with cake:nocache tags replaced.

 */

        protected function _replaceSection() {

                $this->_counter += 1;

                return sprintf('<!--nocache:%03d-->', $this->_counter);

        }

/**

 * Strip cake:nocache tags from a string. Since View::render()

 * only removes un-numbered nocache tags, remove all the numbered ones.

 * This is the complement to _replaceSection.

 *

 * @param string $content String to remove tags from.

 * @return string String with tags removed.

 */

        protected function _stripTags($content) {

                return preg_replace('#<!--/?nocache(\:\d{3})?-->#', '', $content);

        }

/**

 * Parse the output and replace cache tags

 *

 * @param string $cache Output to replace content in.

 * @return string with all replacements made to <!--nocache--><!--nocache-->

 */

        protected function _parseOutput($cache) {

                $count = 0;

                if (!empty($this->_match)) {

                        foreach ($this->_match as $found) {

                                $original = $cache;

                                $length = strlen($found);

                                $position = 0;

                                for ($i = 1; $i <= 1; $i++) {

                                        $position = strpos($cache, $found, $position);

                                        if ($position !== false) {

                                                $cache = substr($original, 0, $position);

                                                $cache .= $this->_replace[$count];

                                                $cache .= substr($original, $position + $length);

                                        } else {

                                                break;

                                        }

                                }

                                $count++;

                        }

                        return $cache;

                }

                return $cache;

        }

/**

 * Write a cached version of the file

 *

 * @param string $content view content to write to a cache file.

 * @param string $timestamp Duration to set for cache file.

 * @param bool|null $useCallbacks Whether to include statements in cached file which

 *   run callbacks, otherwise null.

 * @return bool success of caching view.

 */

        protected function _writeFile($content, $timestamp, $useCallbacks = false) {

                $now = time();

                if (is_numeric($timestamp)) {

                        $cacheTime = $now + $timestamp;

                } else {

                        $cacheTime = strtotime($timestamp, $now);

                }

                $path = $this->request->here();

                if ($path === '/') {

                        $path = 'home';

                }

                $prefix = Configure::read('Cache.viewPrefix');

                if ($prefix) {

                        $path = $prefix . '_' . $path;

                }

                $cache = strtolower(Inflector::slug($path));

                if (empty($cache)) {

                        return null;

                }

                $cache = $cache . '.php';

                $file = '<!--cachetime:' . $cacheTime . '--><?php';

                if (empty($this->_View->plugin)) {

                        $file .= "

                        App::uses('{$this->_View->name}Controller', 'Controller');

                        ";

                } else {

                        $file .= "

                        App::uses('{$this->_View->plugin}AppController', '{$this->_View->plugin}.Controller');

                        App::uses('{$this->_View->name}Controller', '{$this->_View->plugin}.Controller');

                        ";

                }

                $file .= '

                                $request = unserialize(base64_decode(\'' . base64_encode(serialize($this->request)) . '\'));

                                $response->type(\'' . $this->_View->response->type() . '\');

                                $controller = new ' . $this->_View->name . 'Controller($request, $response);

                                $controller->plugin = $this->plugin = \'' . $this->_View->plugin . '\';

                                $controller->helpers = $this->helpers = unserialize(base64_decode(\'' . base64_encode(serialize($this->_View->helpers)) . '\'));

                                $controller->layout = $this->layout = \'' . $this->_View->layout . '\';

                                $controller->theme = $this->theme = \'' . $this->_View->theme . '\';

                                $controller->viewVars = unserialize(base64_decode(\'' . base64_encode(serialize($this->_View->viewVars)) . '\'));

                                Router::setRequestInfo($controller->request);

                                $this->request = $request;';

                if ($useCallbacks) {

                        $file .= '

                                $controller->constructClasses();

                                $controller->startupProcess();';

                }

                $file .= '

                                $this->viewVars = $controller->viewVars;

                                $this->loadHelpers();

                                extract($this->viewVars, EXTR_SKIP);

                ?>';

                $content = preg_replace("/(<\\?xml)/", "<?php echo '$1'; ?>", $content);

                $file .= $content;

                return cache('views' . DS . $cache, $file, $timestamp);

        }

}