/wp-content/plugins/w3-total-cache/lib/W3/Plugin/TotalCacheAdmin.php

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<?php



/**

 * W3 Total Cache Admin plugin

 */

if (!defined('W3TC')) {

    die();

}



define('W3TC_PLUGIN_TOTALCACHE_REGEXP_COOKIEDOMAIN', '~define\s*\(\s*[\'"]COOKIE_DOMAIN[\'"]\s*,.*?\)~is');



require_once W3TC_INC_DIR . '/functions/rule.php';

require_once W3TC_INC_DIR . '/functions/http.php';

require_once W3TC_LIB_W3_DIR . '/Plugin.php';



/**

 * Class W3_Plugin_TotalCacheAdmin

 */

class W3_Plugin_TotalCacheAdmin extends W3_Plugin {

    /**

     * Current page

     *

     * @var string

     */

    var $_page = 'w3tc_general';



    /**

     * Notes

     *

     * @var array

     */

    var $_notes = array();



    /**

     * Errors

     *

     * @var array

     */

    var $_errors = array();



    /**

     * Show support reminder flag

     *

     * @var boolean

     */

    var $_support_reminder = false;



    /**

     * Used in PHPMailer init function

     *

     * @var string

     */

    var $_phpmailer_sender = '';



    /**

     * Array of request types

     *

     * @var array

     */

    var $_request_types = array(

        'bug_report' => 'Submit a Bug Report',

        'new_feature' => 'Suggest a New Feature',

        'email_support' => 'Less than 15 Minute Email Support Response (M-F 9AM - 5PM EDT): $75 USD',

        'phone_support' => 'Less than 15 Minute Phone Support Response (M-F 9AM - 5PM EDT): $150 USD',

        'plugin_config' => 'Professional Plugin Configuration: Starting @ $100 USD',

        'theme_config' => 'Theme Performance Optimization & Plugin Configuration: Starting @ $150 USD',

        'linux_config' => 'Linux Server Optimization & Plugin Configuration: Starting @ $200 USD'

    );



    /**

     * Array of request groups

     *

     * @var array

     */

    var $_request_groups = array(

        'General Support' => array(

            'bug_report',

            'new_feature'

        ),

        'Professional Services (per site pricing)' => array(

            'email_support',

            'phone_support',

            'plugin_config',

            'theme_config',

            'linux_config'

        )

    );



    /**

     * Request price list

     *

     * @var array

     */

    var $_request_prices = array(

        'email_support' => 75,

        'phone_support' => 150,

        'plugin_config' => 100,

        'theme_config' => 150,

        'linux_config' => 200

    );



    /**

     * Runs plugin

     *

     * @return void

     */

    function run() {

        register_activation_hook(W3TC_FILE, array(

            &$this,

            'activate'

        ));



        register_deactivation_hook(W3TC_FILE, array(

            &$this,

            'deactivate'

        ));



        add_action('admin_init', array(

            &$this,

            'admin_init'

        ));



        add_action('admin_menu', array(

            &$this,

            'admin_menu'

        ));



        add_filter('contextual_help_list', array(

            &$this,

            'contextual_help_list'

        ));



        add_filter('plugin_action_links_' . W3TC_FILE, array(

            &$this,

            'plugin_action_links'

        ));



        add_filter('favorite_actions', array(

            &$this,

            'favorite_actions'

        ));



        add_action('in_plugin_update_message-' . W3TC_FILE, array(

            &$this,

            'in_plugin_update_message'

        ));



        if ($this->_config->get_boolean('widget.latest.enabled') || $this->_config->get_boolean('widget.pagespeed.enabled')) {

            add_action('wp_dashboard_setup', array(

                &$this,

                'wp_dashboard_setup'

            ));

        }



        if ($this->_config->get_boolean('pgcache.enabled') || $this->_config->get_boolean('minify.enabled')) {

            add_filter('pre_update_option_active_plugins', array(

                &$this,

                'pre_update_option_active_plugins'

            ));

        }



        if ($this->_config->get_boolean('cdn.enabled') && w3_can_cdn_purge($this->_config->get_string('cdn.engine'))) {

            add_filter('media_row_actions', array(

                &$this,

                'media_row_actions'

            ), 0, 2);

        }



        if ($this->_config->get_boolean('pgcache.enabled')) {

            add_filter('post_row_actions', array(

                &$this,

                'post_row_actions'

            ), 0, 2);



            add_filter('page_row_actions', array(

                &$this,

                'page_row_actions'

            ), 0, 2);

        }

    }



    /**

     * Activate plugin action

     *

     * @return void

     */

    function activate() {

        $this->link_update();

    }



    /**

     * Deactivate plugin action

     *

     * @return void

     */

    function deactivate() {

        $this->link_delete();

    }



    /**

     * Load action

     *

     * @return void

     */

    function load() {

        require_once W3TC_LIB_W3_DIR . '/Request.php';



        $this->_page = W3_Request::get_string('page');



        switch (true) {

            case ($this->_page == 'w3tc_general'):

            case ($this->_page == 'w3tc_pgcache'):

            case ($this->_page == 'w3tc_minify' && W3TC_PHP5):

            case ($this->_page == 'w3tc_dbcache'):

            case ($this->_page == 'w3tc_objectcache'):

            case ($this->_page == 'w3tc_browsercache'):

            case ($this->_page == 'w3tc_mobile'):

            case ($this->_page == 'w3tc_referrer'):

            case ($this->_page == 'w3tc_cdn'):

            case ($this->_page == 'w3tc_install'):

            case ($this->_page == 'w3tc_faq'):

            case ($this->_page == 'w3tc_about'):

            case ($this->_page == 'w3tc_support'):

                break;



            default:

                $this->_page = 'w3tc_general';

        }



        $this->_support_reminder = ($this->_config->get_boolean('notes.support_us') && $this->_config->get_integer('common.install') < (time() - W3TC_SUPPORT_US_TIMEOUT) && $this->_config->get_string('common.support') == '' && !$this->_config->get_boolean('common.tweeted'));



        /**

         * Run plugin action

         */

        $action = false;



        foreach ($_REQUEST as $key => $value) {

            if (strpos($key, 'w3tc_') === 0) {

                $action = 'action_' . substr($key, 5);

                break;

            }

        }



        if ($action && method_exists($this, $action)) {

            check_admin_referer('w3tc');

            call_user_func(array(

                &$this,

                $action

            ));

            exit();

        }

    }



    /**

     * Admin init

     *

     * @return void

     */

    function admin_init() {

        wp_register_style('w3tc-options', plugins_url('pub/css/options.css', W3TC_FILE));

        wp_register_style('w3tc-lightbox', plugins_url('pub/css/lightbox.css', W3TC_FILE));

        wp_register_style('w3tc-widget', plugins_url('pub/css/widget.css', W3TC_FILE));



        wp_register_script('w3tc-metadata', plugins_url('pub/js/metadata.js', W3TC_FILE));

        wp_register_script('w3tc-options', plugins_url('pub/js/options.js', W3TC_FILE));

        wp_register_script('w3tc-lightbox', plugins_url('pub/js/lightbox.js', W3TC_FILE));

        wp_register_script('w3tc-widget', plugins_url('pub/js/widget.js', W3TC_FILE));

    }



    /**

     * Admin menu

     *

     * @return void

     */

    function admin_menu() {

        $pages = array(

            'w3tc_general' => array(

                'General Settings',

                'General Settings'

            ),

            'w3tc_pgcache' => array(

                'Page Cache',

                'Page Cache'

            ),

            'w3tc_minify' => array(

                'Minify',

                'Minify'

            ),

            'w3tc_dbcache' => array(

                'Database Cache',

                'Database Cache'

            ),

            'w3tc_objectcache' => array(

                'Object Cache',

                'Object Cache'

            ),

            'w3tc_browsercache' => array(

                'Browser Cache',

                'Browser Cache'

            ),

            'w3tc_mobile' => array(

                'User Agent Groups',

                'User Agent Groups'

            ),

            'w3tc_referrer' => array(

                'Referrer Groups',

                'Referrer Groups'

            ),

            'w3tc_cdn' => array(

                'Content Delivery Network',

                '<acronym title="Content Delivery Network">CDN</acronym>'

            ),

            'w3tc_faq' => array(

                'FAQ',

                'FAQ'

            ),

            'w3tc_support' => array(

                'Support',

                '<span style="color: red;">Support</span>'

            ),

            'w3tc_install' => array(

                'Install',

                'Install'

            ),

            'w3tc_about' => array(

                'About',

                'About'

            )

        );



        if (!W3TC_PHP5) {

            unset($pages['w3tc_minify']);

        }



        add_menu_page('Performance', 'Performance', 'manage_options', 'w3tc_general', '', plugins_url('w3-total-cache/pub/img/logo_small.png'));



        $submenu_pages = array();



        foreach ($pages as $slug => $titles) {

            $submenu_pages[] = add_submenu_page('w3tc_general', $titles[0] . ' | W3 Total Cache', $titles[1], 'manage_options', $slug, array(

                &$this,

                'options'

            ));

        }



        if (current_user_can('manage_options')) {

            /**

             * Only admin can modify W3TC settings

             */

            foreach ($submenu_pages as $submenu_page) {

                add_action('load-' . $submenu_page, array(

                    &$this,

                    'load'

                ));



                add_action('admin_print_styles-' . $submenu_page, array(

                    &$this,

                    'admin_print_styles'

                ));



                add_action('admin_print_scripts-' . $submenu_page, array(

                    &$this,

                    'admin_print_scripts'

                ));

            }



            /**

             * Only admin can see W3TC notices and errors

             */

            add_action('admin_notices', array(

                &$this,

                'admin_notices'

            ));

        }

    }



    /**

     * Print styles

     *

     * @return void

     */

    function admin_print_styles() {

        wp_enqueue_style('w3tc-options');

        wp_enqueue_style('w3tc-lightbox');

    }



    /**

     * Print scripts

     *

     * @return void

     */

    function admin_print_scripts() {

        wp_enqueue_script('w3tc-metadata');

        wp_enqueue_script('w3tc-options');

        wp_enqueue_script('w3tc-lightbox');



        switch ($this->_page) {

            case 'w3tc_minify':

            case 'w3tc_mobile':

            case 'w3tc_referrer':

            case 'w3tc_cdn':

                wp_enqueue_script('jquery-ui-sortable');

                break;

        }

    }



    /**

     * Contextual help list filter

     *

     * @param string $list

     * @return string

     */

    function contextual_help_list($list) {

        $faq = $this->parse_faq();



        if (isset($faq['Usage'])) {

            $columns = array_chunk($faq['Usage'], ceil(count($faq['Usage']) / 3));



            ob_start();

            include W3TC_INC_DIR . '/options/common/help.php';

            $help = ob_get_contents();

            ob_end_clean();



            $hook = get_plugin_page_hookname($this->_page, 'w3tc_general');



            $list[$hook] = $help;

        }



        return $list;

    }



    /**

     * Plugin action links filter

     *

     * @param array $links

     * @return array

     */

    function plugin_action_links($links) {

        array_unshift($links, '<a class="edit" href="admin.php?page=w3tc_general">Settings</a>');



        return $links;

    }



    /**

     * favorite_actions filter

     *

     * @param array $actions

     * @return void

     */

    function favorite_actions($actions) {

        $actions[wp_nonce_url(admin_url('admin.php?page=w3tc_general&amp;w3tc_flush_all'), 'w3tc')] = array(

            'Empty Caches',

            'manage_options'

        );



        return $actions;

    }



    /**

     * Active plugins pre update option filter

     *

     * @param string $new_value

     * @return string

     */

    function pre_update_option_active_plugins($new_value) {

        $old_value = (array) get_option('active_plugins');



        if ($new_value !== $old_value && in_array(W3TC_FILE, (array) $new_value) && in_array(W3TC_FILE, (array) $old_value)) {

            $this->_config->set('notes.plugins_updated', true);

            $this->_config->save();

        }



        return $new_value;

    }



    /**

     * Show plugin changes

     *

     * @return void

     */

    function in_plugin_update_message() {

        $response = w3_http_get(W3TC_README_URL);



        if (!is_wp_error($response) && $response['response']['code'] == 200) {

            $matches = null;

            $regexp = '~==\s*Changelog\s*==\s*=\s*[0-9.]+\s*=(.*)(=\s*' . preg_quote(W3TC_VERSION) . '\s*=|$)~Uis';



            if (preg_match($regexp, $response['body'], $matches)) {

                $changelog = (array) preg_split('~[\r\n]+~', trim($matches[1]));



                echo '<div style="color: #f00;">Take a minute to update, here\'s why:</div><div style="font-weight: normal;">';

                $ul = false;



                foreach ($changelog as $index => $line) {

                    if (preg_match('~^\s*\*\s*~', $line)) {

                        if (!$ul) {

                            echo '<ul style="list-style: disc; margin-left: 20px;">';

                            $ul = true;

                        }

                        $line = preg_replace('~^\s*\*\s*~', '', htmlspecialchars($line));

                        echo '<li style="width: 50%; margin: 0; float: left; ' . ($index % 2 == 0 ? 'clear: left;' : '') . '">' . $line . '</li>';

                    } else {

                        if ($ul) {

                            echo '</ul><div style="clear: left;"></div>';

                            $ul = false;

                        }

                        echo '<p style="margin: 5px 0;">' . htmlspecialchars($line) . '</p>';

                    }

                }



                if ($ul) {

                    echo '</ul><div style="clear: left;"></div>';

                }



                echo '</div>';

            }

        }

    }



    /**

     * media_row_actions filter

     *

     * @param array $actions

     * @param object $post

     * @return array

     */

    function media_row_actions($actions, $post) {

        $actions = array_merge($actions, array(

            'cdn_purge' => sprintf('<a href="%s">Purge from CDN</a>', wp_nonce_url(sprintf('admin.php?page=w3tc_general&w3tc_cdn_purge_attachment&attachment_id=%d', $post->ID), 'w3tc'))

        ));



        return $actions;

    }



    /**

     * post_row_actions filter

     *

     * @param array $actions

     * @param object $post

     * @return array

     */

    function post_row_actions($actions, $post) {

        $actions = array_merge($actions, array(

            'pgcache_purge' => sprintf('<a href="%s">Purge from Page Cache</a>', wp_nonce_url(sprintf('admin.php?page=w3tc_general&w3tc_pgcache_purge_post&post_id=%d', $post->ID), 'w3tc'))

        ));



        return $actions;

    }



    /**

     * page_row_actions filter

     *

     * @param array $actions

     * @param object $post

     * @return array

     */

    function page_row_actions($actions, $post) {

        $actions = array_merge($actions, array(

            'pgcache_purge' => sprintf('<a href="%s">Purge from Page Cache</a>', wp_nonce_url(sprintf('admin.php?page=w3tc_general&w3tc_pgcache_purge_page&post_id=%d', $post->ID), 'w3tc'))

        ));



        return $actions;

    }



    /**

     * Dashboard setup action

     *

     * @return void

     */

    function wp_dashboard_setup() {

        wp_enqueue_style('w3tc-widget');

        wp_enqueue_script('w3tc-metadata');

        wp_enqueue_script('w3tc-widget');



        if ($this->_config->get_boolean('widget.latest.enabled')) {

            wp_add_dashboard_widget('w3tc_latest', 'The Latest from W3 EDGE', array(

                &$this,

                'widget_latest'

            ), array(

                &$this,

                'widget_latest_control'

            ));

        }



        if ($this->_config->get_boolean('widget.pagespeed.enabled')) {

            wp_add_dashboard_widget('w3tc_pagespeed', 'W3 Total Cache: Google Page Speed Report', array(

                &$this,

                'widget_pagespeed'

            ), array(

                &$this,

                'widget_pagespeed_control'

            ));

        }

    }



    /**

     * Admin notices action

     *

     * @return void

     */

    function admin_notices() {

        $config_path = (w3_is_preview_config() ? W3TC_CONFIG_PREVIEW_PATH : W3TC_CONFIG_PATH);



        $pgcache_rules_core_path = w3_get_pgcache_rules_core_path();

        $pgcache_rules_cache_path = w3_get_pgcache_rules_cache_path();

        $browsercache_rules_cache_path = w3_get_browsercache_rules_cache_path();

        $browsercache_rules_no404wp_path = w3_get_browsercache_rules_no404wp_path();

        $minify_rules_core_path = w3_get_minify_rules_core_path();

        $minify_rules_cache_path = w3_get_minify_rules_cache_path();

        $cookie_domain = $this->get_cookie_domain();



        $error_messages = array(

            'config_save' => sprintf('The settings could not be saved because the configuration file is not write-able. Please run <strong>chmod 777 %s</strong> to resolve this issue.', (file_exists($config_path) ? $config_path : dirname($config_path))),

            'fancy_permalinks_disabled_pgcache' => sprintf('Fancy permalinks are disabled. Please %s it first, then re-attempt to enabling enhanced disk mode.', $this->button_link('enable', 'options-permalink.php')),

            'fancy_permalinks_disabled_browsercache' => sprintf('Fancy permalinks are disabled. Please %s it first, then re-attempt to enabling the \'Do not process 404 errors for static objects with WordPress\'.', $this->button_link('enable', 'options-permalink.php')),

            'pgcache_write_rules_core' => sprintf('The page cache rules could not be modified. Please %srun <strong>chmod 777 %s</strong> to resolve this issue.', (file_exists($pgcache_rules_core_path) ? '' : sprintf('create an empty file in <strong>%s</strong> and ', $pgcache_rules_core_path)), $pgcache_rules_core_path),

            'pgcache_write_rules_cache' => sprintf('The page cache rules could not be modified. Please run <strong>chmod 777 %s</strong> to resolve this issue.', (file_exists($pgcache_rules_cache_path) ? $pgcache_rules_cache_path : dirname($pgcache_rules_cache_path))),

            'pgcache_remove_rules_legacy' => sprintf('The legacy page cache rules could not be removed. Please run <strong>chmod 777 %s</strong> to resolve this issue.', (file_exists($pgcache_rules_cache_path) ? $pgcache_rules_cache_path : dirname($pgcache_rules_cache_path))),

            'pgcache_remove_rules_wpsc' => sprintf('The WP Super Cache rules could not be removed. Please run <strong>chmod 777 %s</strong> to resolve this issue.', (file_exists($pgcache_rules_cache_path) ? $pgcache_rules_cache_path : dirname($pgcache_rules_cache_path))),

            'browsercache_write_rules_cache' => sprintf('The browser cache rules could not be modified. Please %srun <strong>chmod 777 %s</strong> to resolve this issue.', (file_exists($browsercache_rules_cache_path) ? '' : sprintf('create an empty file in <strong>%s</strong> and ', $browsercache_rules_cache_path)), $browsercache_rules_cache_path),

            'browsercache_write_rules_no404wp' => sprintf('The browser cache rules could not be modified. Please %srun <strong>chmod 777 %s</strong> to resolve this issue.', (file_exists($browsercache_rules_no404wp_path) ? '' : sprintf('create an empty file in <strong>%s</strong> and ', $browsercache_rules_no404wp_path)), $browsercache_rules_no404wp_path),

            'browsercache_write_rules_cdn' => sprintf('The browser cache rules for <acronym title="Content Delivery Network">CDN</acronym> could not be modified. Please check <acronym title="Content Delivery Network">CDN</acronym> settings.'),

            'minify_write_rules_core' => sprintf('The minify rules could not be modified. Please run <strong>chmod 777 %s</strong> to resolve this issue.', (file_exists($minify_rules_core_path) ? $minify_rules_core_path : dirname($minify_rules_core_path))),

            'minify_write_rules_cache' => sprintf('The minify rules could not be modified. Please run <strong>chmod 777 %s</strong> to resolve this issue.', (file_exists($minify_rules_cache_path) ? $minify_rules_cache_path : dirname($minify_rules_cache_path))),

            'minify_remove_rules_legacy' => sprintf('The legacy minify rules could not be modified. Please run <strong>chmod 777 %s</strong> to resolve this issue.', (file_exists($minify_rules_cache_path) ? $minify_rules_cache_path : dirname($minify_rules_cache_path))),

            'support_request_type' => 'Please select request type.',

            'support_request_url' => 'Please enter the address of the site in the site <acronym title="Uniform Resource Locator">URL</acronym> field.',

            'support_request_name' => 'Please enter your name in the Name field',

            'support_request_email' => 'Please enter valid email address in the E-Mail field.',

            'support_request_phone' => 'Please enter your phone in the phone field.',

            'support_request_subject' => 'Please enter subject in the subject field.',

            'support_request_description' => 'Please describe the issue in the issue description field.',

            'support_request_wp_login' => 'Please enter an administrator login. Create a temporary one just for this support case if needed.',

            'support_request_wp_password' => 'Please enter WP Admin password, be sure it\'s spelled correctly.',

            'support_request_ftp_host' => 'Please enter <acronym title="Secure Shell">SSH</acronym> or <acronym title="File Transfer Protocol">FTP</acronym> host for the site.',

            'support_request_ftp_login' => 'Please enter <acronym title="Secure Shell">SSH</acronym> or <acronym title="File Transfer Protocol">FTP</acronym> login for the server. Create a temporary one just for this support case if needed.',

            'support_request_ftp_password' => 'Please enter <acronym title="Secure Shell">SSH</acronym> or <acronym title="File Transfer Protocol">FTP</acronym> password for the <acronym title="File Transfer Protocol">FTP</acronym> account.',

            'support_request' => 'Unable to send the support request.',

            'config_import_no_file' => 'Please select config file.',

            'config_import_upload' => 'Unable to upload config file.',

            'config_import_import' => 'Configuration file could not be imported.',

            'config_reset' => sprintf('Default settings could not be restored. Please run <strong>chmod 777 %s</strong> to make the configuration file write-able, then try again.', (file_exists(W3TC_CONFIG_PREVIEW_PATH) ? W3TC_CONFIG_PREVIEW_PATH : W3TC_CONFIG_PREVIEW_PATH)),

            'preview_enable' => sprintf('Preview mode could not be enabled. Please run <strong>chmod 777 %s</strong> to make the configuration file write-able, then try again.', (file_exists(W3TC_CONFIG_PREVIEW_PATH) ? W3TC_CONFIG_PREVIEW_PATH : dirname(W3TC_CONFIG_PREVIEW_PATH))),

            'preview_disable' => sprintf('Preview mode could not be disabled. Please run <strong>chmod 777 %s</strong> to make the configuration file write-able, then try again.', (file_exists($config_path) ? $config_path : dirname($config_path))),

            'preview_deploy' => sprintf('Preview settings could not be deployed. Please run <strong>chmod 777 %s</strong> to make the configuration file write-able, then try again.', (file_exists(W3TC_CONFIG_PATH) ? W3TC_CONFIG_PATH : dirname(W3TC_CONFIG_PATH))),

            'cdn_purge_attachment' => 'Unable to purge attachment.',

            'pgcache_purge_post' => 'Unable to purge post.',

            'pgcache_purge_page' => 'Unable to purge page.',

            'enable_cookie_domain' => sprintf('<strong>%swp-config.php</strong> could not be written, please edit config and add:<br /><strong style="color:#f00;">define(\'COOKIE_DOMAIN\', \'%s\');</strong> before <strong style="color:#f00;">require_once(ABSPATH . \'wp-settings.php\');</strong>.', ABSPATH, addslashes($cookie_domain)),

            'disable_cookie_domain' => sprintf('<strong>%swp-config.php</strong> could not be written, please edit config and add:<br /><strong style="color:#f00;">define(\'COOKIE_DOMAIN\', false);</strong> before <strong style="color:#f00;">require_once(ABSPATH . \'wp-settings.php\');</strong>.', ABSPATH),

            'cloudflare_api_request' => 'Unable to make CloudFlare API request.'

        );



        $note_messages = array(

            'config_save' => 'Plugin configuration successfully updated.',

            'flush_all' => 'All caches successfully emptied.',

            'flush_memcached' => 'Memcached cache(s) successfully emptied.',

            'flush_opcode' => 'Opcode cache(s) successfully emptied.',

            'flush_file' => 'Disk cache(s) successfully emptied.',

            'flush_pgcache' => 'Page cache successfully emptied.',

            'flush_dbcache' => 'Database cache successfully emptied.',

            'flush_objectcache' => 'Object cache successfully emptied.',

            'flush_minify' => 'Minify cache successfully emptied.',

            'pgcache_write_rules_core' => 'Page cache rewrite rules have been successfully written.',

            'pgcache_write_rules_cache' => 'Page cache rewrite rules have been successfully written.',

            'pgcache_remove_rules_legacy' => 'Legacy page cache configuration settings have been successfully removed.',

            'pgcache_remove_rules_wpsc' => 'WP Super Cache configuration settings have been successfully removed.',

            'browsercache_write_rules_cache' => 'Browser cache directives have been successfully written.',

            'browsercache_write_rules_no404wp' => 'Browser cache directives have been successfully written.',

            'minify_write_rules_core' => 'Minify rewrite rules have been successfully written.',

            'minify_write_rules_cache' => 'Minify rewrite rules have been successfully written.',

            'minify_remove_rules_legacy' => 'Legacy minify configuration settings have been successfuly removed.',

            'support_request' => 'The support request has been successfully sent.',

            'config_import' => 'Settings successfully imported.',

            'config_reset' => 'Settings successfully restored.',

            'preview_enable' => 'Preview mode was successfully enabled',

            'preview_disable' => 'Preview mode was successfully disabled',

            'preview_deploy' => 'Preview settings successfully deployed.',

            'cdn_purge_attachment' => 'Attachment successfully purged.',

            'pgcache_purge_post' => 'Post successfully purged.',

            'pgcache_purge_page' => 'Page successfully purged.'

        );



        $errors = array();

        $notes = array();



        require_once W3TC_LIB_W3_DIR . '/Request.php';



        $error = W3_Request::get_string('w3tc_error');

        $note = W3_Request::get_string('w3tc_note');



        /**

         * Handle messages from reqeust

         */

        if (isset($error_messages[$error])) {

            $errors[] = $error_messages[$error];

        }



        if (isset($note_messages[$note])) {

            $notes[] = $note_messages[$note];

        }



        /**

         * Check config file

         */

        if (!w3_is_preview_config() && !file_exists(W3TC_CONFIG_PATH)) {

            $errors[] = sprintf('<strong>W3 Total Cache Error:</strong> Default settings are in use. The configuration file could not be read or doesn\'t exist. Please %s to create the file.', $this->button_link('save the settings', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_save_config', $this->_page), 'w3tc')));

        }



        /**

         * CDN notifications

         */

        if ($this->_config->get_boolean('cdn.enabled') && !w3_is_cdn_mirror($this->_config->get_string('cdn.engine'))) {

            /**

             * Show notification after theme change

             */

            if ($this->_config->get_boolean('notes.theme_changed')) {

                $notes[] = sprintf('The active theme has changed, please %s now to ensure proper operation. %s', $this->button_popup('upload active theme files', 'cdn_export', 'cdn_export_type=theme'), $this->button_hide_note('Hide this message', 'theme_changed'));

            }



            /**

             * Show notification after WP upgrade

             */

            if ($this->_config->get_boolean('notes.wp_upgraded')) {

                $notes[] = sprintf('Upgraded WordPress? Please %s files now to ensure proper operation. %s', $this->button_popup('upload wp-includes', 'cdn_export', 'cdn_export_type=includes'), $this->button_hide_note('Hide this message', 'wp_upgraded'));

            }



            /**

             * Show notification after CDN enable

             */

            if ($this->_config->get_boolean('notes.cdn_upload') || $this->_config->get_boolean('notes.cdn_reupload')) {

                $cdn_upload_buttons = array();



                if ($this->_config->get_boolean('cdn.includes.enable')) {

                    $cdn_upload_buttons[] = $this->button_popup('wp-includes', 'cdn_export', 'cdn_export_type=includes');

                }



                if ($this->_config->get_boolean('cdn.theme.enable')) {

                    $cdn_upload_buttons[] = $this->button_popup('theme files', 'cdn_export', 'cdn_export_type=theme');

                }



                if ($this->_config->get_boolean('minify.enabled') && $this->_config->get_boolean('cdn.minify.enable')) {

                    $cdn_upload_buttons[] = $this->button_popup('minify files', 'cdn_export', 'cdn_export_type=minify');

                }



                if ($this->_config->get_boolean('cdn.custom.enable')) {

                    $cdn_upload_buttons[] = $this->button_popup('custom files', 'cdn_export', 'cdn_export_type=custom');

                }



                if ($this->_config->get_boolean('notes.cdn_upload')) {

                    $notes[] = sprintf('Make sure to %s and upload the %s, files to the <acronym title="Content Delivery Network">CDN</acronym> to ensure proper operation. %s', $this->button_popup('export the media library', 'cdn_export_library'), implode(', ', $cdn_upload_buttons), $this->button_hide_note('Hide this message', 'cdn_upload'));

                }



                if ($this->_config->get_boolean('notes.cdn_reupload')) {

                    $notes[] = sprintf('Settings that effect Browser Cache settings for files hosted by the CDN have been changed. To apply the new settings %s and %s. %s', $this->button_popup('export the media library', 'cdn_export_library'), implode(', ', $cdn_upload_buttons), $this->button_hide_note('Hide this message', 'cdn_reupload'));

                }

            }



            /**

             * Show notification if upload queue is not empty

             */

            if (!$this->is_queue_empty()) {

                $errors[] = sprintf('The %s has unresolved errors. Empty the queue to restore normal operation.', $this->button_popup('unsuccessful transfer queue', 'cdn_queue'));

            }

        }



        /**

         * Show notification after plugin activate/deactivate

         */

        if ($this->_config->get_boolean('notes.plugins_updated')) {

            $texts = array();



            if ($this->_config->get_boolean('pgcache.enabled')) {

                $texts[] = $this->button_link('empty the page cache', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_flush_pgcache', $this->_page), 'w3tc'));

            }



            if ($this->_config->get_boolean('minify.enabled')) {

                $texts[] = sprintf('check the %s to maintain the desired user experience', $this->button_hide_note('minify settings', 'plugins_updated', 'admin.php?page=w3tc_minify'));

            }



            if (count($texts)) {

                $notes[] = sprintf('One or more plugins have been activated or deactivated, please %s. %s', implode(' and ', $texts), $this->button_hide_note('Hide this message', 'plugins_updated'));

            }

        }



        /**

         * Show notification when page cache needs to be emptied

         */

        if ($this->_config->get_boolean('pgcache.enabled') && $this->_config->get('notes.need_empty_pgcache') && !w3_is_preview_config()) {

            $notes[] = sprintf('The setting change(s) made either invalidate the cached data or modify the behavior of the site. %s now to provide a consistent user experience.', $this->button_link('Empty the page cache', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_flush_pgcache', $this->_page), 'w3tc')));

        }



        /**

         * Show notification when object cache needs to be emptied

         */

        if ($this->_config->get_boolean('objectcache.enabled') && $this->_config->get('notes.need_empty_objectcache') && !w3_is_preview_config()) {

            $notes[] = sprintf('The setting change(s) made either invalidate the cached data or modify the behavior of the site. %s now to provide a consistent user experience.', $this->button_link('Empty the object cache', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_flush_objectcache', $this->_page), 'w3tc')));

        }



        /**

         * Minify notifications

         */

        if ($this->_config->get_boolean('minify.enabled')) {

            /**

             * Minify error occured

             */

            if ($this->_config->get('notes.minify_error')) {

                $errors[] = sprintf('Recently an error occurred while creating the CSS / JS minify cache: %s. %s', $this->_config->get_string('minify.error.last'), $this->button_hide_note('Hide this message', 'minify_error'));

            }



            /**

             * Show notification when minify needs to be emptied

             */

            if ($this->_config->get('notes.need_empty_minify') && !w3_is_preview_config()) {

                $notes[] = sprintf('The setting change(s) made either invalidate the cached data or modify the behavior of the site. %s now to provide a consistent user experience.', $this->button_link('Empty the minify cache', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_flush_minify', $this->_page), 'w3tc')));

            }

        }



        /**

         * Show messages

         */

        foreach ($errors as $error) {

            echo sprintf('<div class="error"><p>%s</p></div>', $error);

        }



        foreach ($notes as $note) {

            echo sprintf('<div class="updated fade"><p>%s</p></div>', $note);

        }

    }



    /**

     * Options page

     *

     * @return void

     */

    function options() {

        /**

         * Check for page cache availability

         */

        if ($this->_config->get_boolean('pgcache.enabled')) {

            if (!$this->advanced_cache_installed()) {

                $this->_errors[] = sprintf('Page caching is not available: %s is not installed. Either the <strong>%s</strong> directory is not write-able or another caching plugin installed. This error message will automatically disappear once the change is successfully made.', W3TC_ADDIN_FILE_ADVANCED_CACHE, WP_CONTENT_DIR);

            } elseif (!$this->advanced_cache_check()) {

                $this->_errors[] = sprintf('Page caching is not available. The current add-in %s is either an incorrect file or an old version. De-activate the plugin, remove the file, then activate the plugin again.', W3TC_ADDIN_FILE_ADVANCED_CACHE);

            } elseif (!defined('WP_CACHE') || !WP_CACHE) {

                $this->_errors[] = sprintf('Page caching is not available: please add: <strong>define(\'WP_CACHE\', true);</strong> to <strong>%swp-config.php</strong>. This error message will automatically disappear once the change is successfully made.', ABSPATH);

            } elseif ($this->_config->get_string('pgcache.engine') == 'file_generic' && $this->_config->get_boolean('config.check') && w3_can_check_rules()) {

                $w3_plugin_pgcache = & w3_instance('W3_Plugin_PgCacheAdmin');



                if ($w3_plugin_pgcache->check_rules_core()) {

                    if (!$this->test_rewrite_pgcache()) {

                        $this->_errors[] = 'It appears Page Cache <acronym title="Uniform Resource Locator">URL</acronym> rewriting is not working. If using apache, verify that the server configuration allows .htaccess or if using nginx verify all configuration files are included in the configuration.';

                    }

                } elseif ($this->_config->get_boolean('notes.pgcache_rules_core')) {

                    $this->_errors[] = sprintf('Disk enhanced page caching is not active. To enable it, add the following rules into the server configuration file (<strong>%s</strong>) of the site above the WordPress directives %s <textarea class="w3tc-rules" cols="120" rows="10" readonly="readonly">%s</textarea>. Or if permission allow this can be done automatically, by clicking here: %s. %s', w3_get_pgcache_rules_core_path(), $this->button('view code', '', 'w3tc-show-rules'), htmlspecialchars($w3_plugin_pgcache->generate_rules_core()), $this->button_link('auto-install', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_pgcache_write_rules_core', $this->_page), 'w3tc')), $this->button_hide_note('Hide this message', 'pgcache_rules_core'));

                }



                if ($this->_config->get_boolean('notes.pgcache_rules_legacy') && $w3_plugin_pgcache->check_rules_legacy()) {

                    $this->_errors[] = sprintf('Legacy Page Cache rewrite rules have been found. To remove them manually, edit the configuration file (<strong>%s</strong>) and remove all lines between and including <strong>%s</strong> and <strong>%s</strong> markers inclusive. Or if permission allow this can be done automatically, by clicking here: %s. %s', w3_get_pgcache_rules_core_path(), W3TC_MARKER_BEGIN_PGCACHE_LEGACY, W3TC_MARKER_END_PGCACHE_LEGACY, $this->button_link('auto-remove', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_pgcache_remove_rules_legacy', $this->_page), 'w3tc')), $this->button_hide_note('Hide this message', 'pgcache_rules_legacy'));

                }



                if ($this->_config->get_boolean('notes.pgcache_rules_wpsc') && $w3_plugin_pgcache->check_rules_wpsc()) {

                    $this->_errors[] = sprintf('WP Super Cache rewrite rules have been found. To remove them manually, edit the configuration file (<strong>%s</strong>) and remove all lines between and including <strong>%s</strong> and <strong>%s</strong> markers inclusive. Or if permission allow this can be done automatically, by clicking here: %s. %s', w3_get_pgcache_rules_core_path(), W3TC_MARKER_BEGIN_PGCACHE_WPSC, W3TC_MARKER_END_PGCACHE_WPSC, $this->button_link('auto-remove', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_pgcache_remove_rules_wpsc', $this->_page), 'w3tc')), $this->button_hide_note('Hide this message', 'pgcache_rules_wpsc'));

                }



                if ($this->_config->get_boolean('notes.pgcache_rules_cache') && !$w3_plugin_pgcache->check_rules_cache()) {

                    $this->_errors[] = sprintf('Disk enhanced page caching is not active. To enable it, add the following rules into the server configuration file (<strong>%s</strong>) of the site %s <textarea class="w3tc-rules" cols="120" rows="10" readonly="readonly">%s</textarea>. This can be done automatically, by clicking here: %s. %s', w3_get_pgcache_rules_cache_path(), $this->button('view code', '', 'w3tc-show-rules'), htmlspecialchars($w3_plugin_pgcache->generate_rules_cache()), $this->button_link('auto-install', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_pgcache_write_rules_cache', $this->_page), 'w3tc')), $this->button_hide_note('Hide this message', 'pgcache_rules_cache'));

                }

            }

        }



        /**

         * Check for browser cache availability

         */

        if ($this->_config->get_boolean('browsercache.enabled') && $this->_config->get_boolean('config.check') && w3_can_check_rules()) {

            $w3_plugin_browsercache = & w3_instance('W3_Plugin_BrowserCacheAdmin');



            if ($this->_config->get_boolean('notes.browsercache_rules_cache') && !$w3_plugin_browsercache->check_rules_cache()) {

                $this->_errors[] = sprintf('Browser caching is not active. To enable it, add the following rules into the server configuration file (<strong>%s</strong>) of the site %s <textarea class="w3tc-rules" cols="120" rows="10" readonly="readonly">%s</textarea>. Or if permission allow this can be done automatically, by clicking here: %s. %s', w3_get_browsercache_rules_cache_path(), $this->button('view code', '', 'w3tc-show-rules'), htmlspecialchars($w3_plugin_browsercache->generate_rules_cache()), $this->button_link('auto-install', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_browsercache_write_rules_cache', $this->_page), 'w3tc')), $this->button_hide_note('Hide this message', 'browsercache_rules_cache'));

            }



            if ($this->_config->get_boolean('notes.browsercache_rules_no404wp') && $this->_config->get_boolean('browsercache.no404wp') && !$w3_plugin_browsercache->check_rules_no404wp()) {

                $this->_errors[] = sprintf('"Do not process 404 errors for static objects with WordPress" feature is not active. To enable it, add the following rules into the server configuration file (<strong>%s</strong>) of the site %s <textarea class="w3tc-rules" cols="120" rows="10" readonly="readonly">%s</textarea>. Or if permission allow this can be done automatically, by clicking here: %s. %s', w3_get_browsercache_rules_no404wp_path(), $this->button('view code', '', 'w3tc-show-rules'), htmlspecialchars($w3_plugin_browsercache->generate_rules_no404wp()), $this->button_link('auto-install', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_browsercache_write_rules_no404wp', $this->_page), 'w3tc')), $this->button_hide_note('Hide this message', 'browsercache_rules_no404wp'));

            }

        }



        /**

         * Check for minify availability

         */

        if ($this->_config->get_boolean('minify.enabled')) {

            if ($this->_config->get_boolean('minify.rewrite') && $this->_config->get_boolean('config.check') && w3_can_check_rules()) {

                $w3_plugin_minify = & w3_instance('W3_Plugin_MinifyAdmin');



                if ($w3_plugin_minify->check_rules_core()) {

                    if (!$this->test_rewrite_minify()) {

                        $this->_errors[] = 'It appears Minify <acronym title="Uniform Resource Locator">URL</acronym> rewriting is not working. If using apache, verify that the server configuration allows .htaccess or if using nginx verify all configuration files are included in the configuration.';

                    }

                } elseif ($this->_config->get_boolean('notes.minify_rules_core')) {

                    $this->_errors[] = sprintf('Minify is not active. To enable it, add the following rules into the server configuration file (<strong>%s</strong>) of the site %s <textarea class="w3tc-rules" cols="120" rows="10" readonly="readonly">%s</textarea>. This can be done automatically, by clicking here: %s. %s', w3_get_minify_rules_core_path(), $this->button('view code', '', 'w3tc-show-rules'), htmlspecialchars($w3_plugin_minify->generate_rules_core()), $this->button_link('auto-install', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_minify_write_rules_core', $this->_page), 'w3tc')), $this->button_hide_note('Hide this message', 'minify_rules_core'));

                }



                if ($this->_config->get_boolean('notes.minify_rules_legacy') && $w3_plugin_minify->check_rules_legacy()) {

                    $this->_errors[] = sprintf('Legacy Minify rewrite rules have been found. To remove them manually, edit the configuration file (<strong>%s</strong>) and remove all lines between and including <strong>%s</strong> and <strong>%s</strong> markers inclusive. Or if permission allow this can be done automatically, by clicking here: %s. %s', w3_get_minify_rules_core_path(), W3TC_MARKER_BEGIN_MINIFY_LEGACY, W3TC_MARKER_END_MINIFY_LEGACY, $this->button_link('auto-remove', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_minify_remove_rules_legacy', $this->_page), 'w3tc')), $this->button_hide_note('Hide this message', 'minify_rules_legacy'));

                }



                if ($this->_config->get_string('minify.engine') == 'file' && $this->_config->get_boolean('notes.minify_rules_cache') && !$w3_plugin_minify->check_rules_cache()) {

                    $this->_errors[] = sprintf('Minify is not active. To enable it, add the following rules into the server configuration file (<strong>%s</strong>) of the site %s <textarea class="w3tc-rules" cols="120" rows="10" readonly="readonly">%s</textarea>. This can be done automatically, by clicking here: %s. %s', w3_get_minify_rules_cache_path(), $this->button('view code', '', 'w3tc-show-rules'), htmlspecialchars($w3_plugin_minify->generate_rules_cache()), $this->button_link('auto-install', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_minify_write_rules_cache', $this->_page), 'w3tc')), $this->button_hide_note('Hide this message', 'minify_rules_cache'));

                }

            }



            /**

             * Minifiers availability error handling

             */

            $minifiers_errors = array();



            if ($this->_config->get_string('minify.js.engine') == 'yuijs') {

                $path_java = $this->_config->get_string('minify.yuijs.path.java');

                $path_jar = $this->_config->get_string('minify.yuijs.path.jar');



                if (!file_exists($path_java)) {

                    $minifiers_errors[] = sprintf('YUI Compressor (JS): JAVA executable path was not found. The default minifier JSMin will be used instead.');

                } elseif (!file_exists($path_jar)) {

                    $minifiers_errors[] = sprintf('YUI Compressor (JS): JAR file path was not found. The default minifier JSMin will be used instead.');

                }

            }



            if ($this->_config->get_string('minify.css.engine') == 'yuicss') {

                $path_java = $this->_config->get_string('minify.yuicss.path.java');

                $path_jar = $this->_config->get_string('minify.yuicss.path.jar');



                if (!file_exists($path_java)) {

                    $minifiers_errors[] = sprintf('YUI Compressor (CSS): JAVA executable path was not found. The default CSS minifier will be used instead.');

                } elseif (!file_exists($path_jar)) {

                    $minifiers_errors[] = sprintf('YUI Compressor (CSS): JAR file path was not found. The default CSS minifier will be used instead.');

                }

            }



            if ($this->_config->get_string('minify.js.engine') == 'ccjs') {

                $path_java = $this->_config->get_string('minify.ccjs.path.java');

                $path_jar = $this->_config->get_string('minify.ccjs.path.jar');



                if (!file_exists($path_java)) {

                    $minifiers_errors[] = sprintf('Closure Compiler: JAVA executable path was not found. The default minifier JSMin will be used instead.');

                } elseif (!file_exists($path_jar)) {

                    $minifiers_errors[] = sprintf('Closure Compiler: JAR file path was not found. The default minifier JSMin will be used instead.');

                }

            }



            if (count($minifiers_errors)) {

                $minify_error = 'The following minifiers cannot be found or are no longer working:</p><ul>';



                foreach ($minifiers_errors as $minifiers_error) {

                    $minify_error .= '<li>' . $minifiers_error . '</li>';

                }



                $minify_error .= '</ul><p>This message will automatically disappear once the issue is resolved.';



                $this->_errors[] = $minify_error;

            }

        }



        /**

         * Check for database cache availability

         */

        if ($this->_config->get_boolean('dbcache.enabled')) {

            if (!$this->db_installed()) {

                $this->_errors[] = sprintf('Database caching is not available: %s is not installed. Either the <strong>%s</strong> directory is not write-able or another caching plugin is installed. This error message will automatically disappear once the change is successfully made.', W3TC_ADDIN_FILE_DB, WP_CONTENT_DIR);

            } elseif (!$this->db_check()) {

                $this->_errors[] = sprintf('Database caching is not avail…

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