<?php
/**
 *  @copyright 2017  Cloudways  https://www.cloudways.com
 *
 *  Original development of this plugin by JoomUnited https://www.joomunited.com/
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
if ( ! defined( 'ABSPATH' ) ) exit;
class Breeze_PurgeCache {

    public function set_action() {
        add_action('pre_post_update', array($this, 'purge_post_on_update'), 10, 1);
        add_action('save_post', array($this, 'purge_post_on_update'), 10, 1);
        add_action('wp_trash_post', array($this, 'purge_post_on_update'), 10, 1);
        add_action('comment_post', array($this, 'purge_post_on_new_comment'), 10, 3);
        add_action('wp_set_comment_status', array($this, 'purge_post_on_comment_status_change'), 10, 2);
        add_action('set_comment_cookies', array($this, 'set_comment_cookie_exceptions'), 10, 2);
    }

    /**
     * When user posts a comment, set a cookie so we don't show them page cache
     *
     * @param  WP_Comment $comment
     * @param  WP_User $user
     * @since  1.3
     */
    public function set_comment_cookie_exceptions($comment, $user) {
        $config = breeze_get_option( 'basic_settings' );
        // File based caching only
        if (!empty($config['breeze-active'])) {

            $post_id = $comment->comment_post_ID;

            setcookie('breeze_commented_posts[' . $post_id . ']', parse_url(get_permalink($post_id), PHP_URL_PATH), ( time() + HOUR_IN_SECONDS * 24 * 30));
        }
    }

//    Automatically purge all file based page cache on post changes
    public function purge_post_on_update($post_id) {
        $post_type = get_post_type($post_id);
        if (( defined('DOING_AUTOSAVE') && DOING_AUTOSAVE ) || 'revision' === $post_type) {
            return;
        } elseif (!current_user_can('edit_post', $post_id) && (!defined('DOING_CRON') || !DOING_CRON )) {
            return;
        }

        $config = breeze_get_option( 'basic_settings' );

        // File based caching only
        if (!empty($config['breeze-active'])) {
            self::breeze_cache_flush();
        }
    }

    public function purge_post_on_new_comment($comment_ID, $approved, $commentdata) {
        if (empty($approved)) {
            return;
        }
        $config = breeze_get_option( 'basic_settings' );
        // File based caching only
        if (!empty($config['breeze-active'])) {
            $post_id = $commentdata['comment_post_ID'];

            global $wp_filesystem;

            if ( empty( $wp_filesystem ) ) {
                require_once( ABSPATH . '/wp-admin/includes/file.php' );
                WP_Filesystem();
            }

            $url_path =  get_permalink($post_id);
            if ( $wp_filesystem->exists( breeze_get_cache_base_path() . md5( $url_path ) ) ) {
                $wp_filesystem->rmdir( breeze_get_cache_base_path() . md5( $url_path ), true );
            }
        }
    }

//            if a comments status changes, purge it's parent posts cache
    public function purge_post_on_comment_status_change($comment_ID, $comment_status) {
        $config = breeze_get_option( 'basic_settings' );

        // File based caching only
        if (!empty($config['breeze-active'])) {
            $comment = get_comment($comment_ID);
            if(!empty($comment)){
                $post_id = $comment->comment_post_ID;

                global $wp_filesystem;

                WP_Filesystem();

                $url_path =  get_permalink($post_id);

                if ( $wp_filesystem->exists( breeze_get_cache_base_path() . md5( $url_path ) ) ) {
                    $wp_filesystem->rmdir( breeze_get_cache_base_path() . md5( $url_path ), true );
                }
            }
        }
    }

    //clean cache
    public static function breeze_cache_flush() {
        global $wp_filesystem;

        require_once( ABSPATH . 'wp-admin/includes/file.php');

		WP_Filesystem();

		$cache_path = breeze_get_cache_base_path( is_network_admin(), true );
        $wp_filesystem->rmdir( untrailingslashit( $cache_path ), true );

        if ( function_exists( 'wp_cache_flush' ) ) {
            wp_cache_flush();
        }
    }

    //delete file for clean up

    public function clean_up() {

        global $wp_filesystem;
        $file = untrailingslashit( WP_CONTENT_DIR )  . '/advanced-cache.php';

        $ret = true;

        if ( ! $wp_filesystem->delete( $file ) ) {
            $ret = false;
        }

        $folder = untrailingslashit( breeze_get_cache_base_path() );

        if ( ! $wp_filesystem->delete( $folder, true ) ) {
            $ret = false;
        }

        return $ret;
    }

    /**
     * Return an instance of the current class, create one if it doesn't exist
     * @since  1.0
     * @return object
     */
    public static function factory() {

        static $instance;

        if (!$instance) {
            $instance = new self();
            $instance->set_action();
        }

        return $instance;
    }

}
$settings = breeze_get_option( 'basic_settings' );
if ( isset( $settings['breeze-active'] ) && $settings['breeze-active'] ) {
	Breeze_PurgeCache::factory();
}