<?php
defined( 'ABSPATH' ) or	die( 'Cheatin&#8217; uh?' );

// Launch hooks that deletes all the cache domain
add_action( 'switch_theme'				,     'rocket_clean_domain' );	// When user change theme
add_action( 'user_register'				,     'rocket_clean_domain' );	// When a user is added
add_action( 'profile_update'			,     'rocket_clean_domain' );	// When a user is updated
add_action( 'deleted_user'				,     'rocket_clean_domain' );	// When a user is deleted
add_action( 'wp_update_nav_menu'		,     'rocket_clean_domain' );	// When a custom menu is update
add_action( 'update_option_sidebars_widgets', 'rocket_clean_domain' );	// When you change the order of widgets
add_action( 'update_option_category_base',    'rocket_clean_domain' );	// When category permalink prefix is update
add_action( 'update_option_tag_base'	,     'rocket_clean_domain' ); 	// When tag permalink prefix is update
add_action( 'permalink_structure_changed',    'rocket_clean_domain' ); 	// When permalink structure is update
add_action( 'create_term'				,     'rocket_clean_domain' ); 	// When a term is created
add_action( 'edited_terms'				,     'rocket_clean_domain' );	// When a term is updated
add_action( 'delete_term'				,     'rocket_clean_domain' );	// When a term is deleted
add_action( 'add_link'					,     'rocket_clean_domain' );	// When a link is added
add_action( 'edit_link'					,     'rocket_clean_domain' );	// When a link is updated
add_action( 'delete_link'				,     'rocket_clean_domain' );	// When a link is deleted
add_action( 'customize_save'			,     'rocket_clean_domain' );	// When customizer is saved
add_action( 'avada_clear_dynamic_css_cache',  'rocket_clean_domain' );	// When Avada theme purge its own cache
add_action( 'update_option_theme_mods_' . get_option( 'stylesheet' ), 'rocket_clean_domain' ); // When location of a menu is updated.

/**
 * When SuperCacher (SiteGround) is purged
 *
 * @since 2.3.5
 */
add_action( 'wp_ajax_sg-cachepress-purge',    'rocket_clean_domain', 0 );
add_action( 'admin_post_sg-cachepress-purge', 'rocket_clean_domain', 0 );

/**
 * Purge cache When a widget is updated
 *
 * @since 1.1.1
 *
 * @param object $instance Widget instance.
 * @return object Widget instance
 */
function rocket_widget_update_callback( $instance ) {
	rocket_clean_domain();
	return $instance;
}
add_filter( 'widget_update_callback'	, 'rocket_widget_update_callback' );

/*
 @since 1.3.3
 * For not conflit with WooCommerce when clean_post_cache is called
*/
add_filter( 'delete_transient_wc_products_onsale', 'wp_suspend_cache_invalidation' );

/*
 @since 2.3
 * For not conflit with SuperCacher (SiteGround) Pretty good hosting!
*/
add_action( 'after_rocket_clean_domain', 'rocket_clean_supercacher' );

/*
 @since 2.5.5
 * For not conflit with StudioPress Accelerator
*/
add_action( 'after_rocket_clean_domain', 'rocket_clean_studiopress_accelerator' );

/*
 @since 2.5.5
 * For not conflit with Varnish HTTP Purge
*/
add_action( 'after_rocket_clean_domain', 'rocket_clean_varnish_http_purge' );

/*
 @since 2.5.7
 * For not conflit with Pagely Hosting
*/
add_action( 'after_rocket_clean_domain', 'rocket_clean_pagely' );

/*
 @since 2.5.11
 * For not conflit with Pressidium Hosting
*/
add_action( 'after_rocket_clean_domain', 'rocket_clean_pressidium' );

/**
 * Update cache when a post is updated or commented
 *
 * @since 2.8   Only add post type archive if post type is not post
 * @since 2.6 	Purge the page defined in "Posts page" option
 * @since 2.5.5 Don't cache for auto-draft post status
 * @since 1.3.2 Add wp_update_comment_count to purge cache when a comment is added/updated/deleted
 * @since 1.3.0 Compatibility with WPML
 * @since 1.3.0 Add 2 hooks : before_rocket_clean_post, after_rocket_clean_post
 * @since 1.3.0 Purge all parents of the post and the author page
 * @since 1.2.2 Add wp_trash_post and delete_post to purge cache when a post is trashed or deleted
 * @since 1.1.3 Use clean_post_cache instead of transition_post_status, transition_comment_status and preprocess_comment
 * @since 1.0
 *
 * @param int $post_id The post ID.
 */
function rocket_clean_post( $post_id ) {
	if ( defined( 'DOING_AUTOSAVE' ) ) {
		return;
	}

	$purge_urls = array();

	// Get all post infos.
	$post = get_post( $post_id );

	// Return if $post is not an object.
	if ( ! is_object( $post ) ) {
		return;
	}

	// No purge for specific conditions.
	if ( 'auto-draft' === $post->post_status || empty( $post->post_type ) || 'nav_menu_item' === $post->post_type ) {
		return;
	}

	// Don't purge if post's post type is not public or not publicly queryable.
	$post_type = get_post_type_object( $post->post_type );
	if ( ! is_object( $post_type ) || true !== $post_type->public ) {
		return;
	}

	// Get the post language.
	$lang = false;

	// WPML.
	if ( rocket_is_plugin_active( 'sitepress-multilingual-cms/sitepress.php' ) && ! rocket_is_plugin_active( 'woocommerce-multilingual/wpml-woocommerce.php' ) ) {
		$lang = $GLOBALS['sitepress']->get_language_for_element( $post_id, 'post_' . get_post_type( $post_id ) );

		// Polylang.
	} elseif ( rocket_is_plugin_active( 'polylang/polylang.php' ) || rocket_is_plugin_active( 'polylang-pro/polylang.php' ) ) {
		$lang = pll_get_post_language( $post_id );
	}

	// Get the permalink structure.
	$permalink_structure = get_rocket_sample_permalink( $post_id );

	// Get permalink.
	$permalink = str_replace( array( '%postname%', '%pagename%' ), $permalink_structure[1], $permalink_structure[0] );

	// Add permalink.
	if ( parse_url( $permalink, PHP_URL_PATH ) !== '/' ) {
		array_push( $purge_urls, $permalink );
	}

	// Add Posts page.
	if ( 'post' === $post->post_type && (int) get_option( 'page_for_posts' ) > 0 ) {
		array_push( $purge_urls, get_permalink( get_option( 'page_for_posts' ) ) );
	}

	// Add Post Type archive.
	if ( 'post' !== $post->post_type ) {
	    if ( $post_type_archive = get_post_type_archive_link( get_post_type( $post_id ) ) ) {
	    	$post_type_archive = trailingslashit( $post_type_archive );
			array_push( $purge_urls, $post_type_archive . 'index.html' );
			array_push( $purge_urls, $post_type_archive . 'index.html_gzip' );
			array_push( $purge_urls, $post_type_archive . $GLOBALS['wp_rewrite']->pagination_base );
	    }
	}

	// Add next post.
	$next_post = get_adjacent_post( false, '', false );
	if ( $next_post ) {
		array_push( $purge_urls, get_permalink( $next_post ) );
	}

	// Add next post in same category.
	$next_in_same_cat_post = get_adjacent_post( true, '', false );
	if ( $next_in_same_cat_post && $next_in_same_cat_post !== $next_post ) {
		array_push( $purge_urls, get_permalink( $next_in_same_cat_post ) );
	}

	// Add previous post.
	$previous_post = get_adjacent_post( false, '', true );
	if ( $previous_post ) {
		array_push( $purge_urls, get_permalink( $previous_post ) );
	}

	// Add previous post in same category.
	$previous_in_same_cat_post = get_adjacent_post( true, '', true );
	if ( $previous_in_same_cat_post && $previous_in_same_cat_post !== $previous_post ) {
		array_push( $purge_urls, get_permalink( $previous_in_same_cat_post ) );
	}

	// Add urls page to purge every time a post is save.
	$cache_purge_pages = get_rocket_option( 'cache_purge_pages' );
	if ( $cache_purge_pages ) {
		global $blog_id;

		$home_url = get_option( 'home' );

		if ( ! empty( $blog_id ) && is_multisite() ) {
			switch_to_blog( $blog_id );
			$home_url = get_option( 'home' );
			restore_current_blog();
		}

		foreach ( $cache_purge_pages as $page ) {
			$page = trailingslashit( $home_url ) . $page;
			array_push( $purge_urls, $page );
		}
	}

	// Add all terms archive page to purge.
	$purge_terms = get_rocket_post_terms_urls( $post_id );
	if ( count( $purge_terms ) ) {
		$purge_urls = array_merge( $purge_urls, $purge_terms );
	}

	// Add all dates archive page to purge.
	$purge_dates = get_rocket_post_dates_urls( $post_id );
	if ( count( $purge_dates ) ) {
		$purge_urls = array_merge( $purge_urls, $purge_dates );
	}

	// Add the author page.
	$purge_author = array( get_author_posts_url( $post->post_author ) );
	$purge_urls = array_merge( $purge_urls, $purge_author );

	// Add all parents.
	$parents = get_post_ancestors( $post_id );
	if ( (bool) $parents ) {
		foreach ( $parents as $parent_id ) {
			array_push( $purge_urls, get_permalink( $parent_id ) );
		}
	}

	/**
	 * Fires before cache files related with the post are deleted
	 *
	 * @since 1.3.0
	 *
	 * @param obj 	 $post 		 The post object
	 * @param array  $purge_urls URLs cache files to remove
	 * @param string $lang 		 The post language
	 */
	do_action( 'before_rocket_clean_post', $post, $purge_urls, $lang );

	/**
	 * Filter URLs cache files to remove
	 *
	 * @since 1.0
	 *
	 * @param array $purge_urls List of URLs cache files to remove
	 */
	$purge_urls = apply_filters( 'rocket_post_purge_urls', $purge_urls, $post );

	// Purge all files.
	rocket_clean_files( $purge_urls );

	// Never forget to purge homepage and their pagination.
	rocket_clean_home( $lang );

	// Purge home feeds (blog & comments).
	rocket_clean_home_feeds();

	/**
	 * Fires after cache files related with the post are deleted
	 *
	 * @since 1.3.0
	 *
	 * @param obj 	 $post 		 The post object
	 * @param array  $purge_urls URLs cache files to remove
	 * @param string $lang 		 The post language
	 */
	do_action( 'after_rocket_clean_post', $post, $purge_urls, $lang );
}
add_action( 'wp_trash_post'				, 'rocket_clean_post' );
add_action( 'delete_post'				, 'rocket_clean_post' );
add_action( 'clean_post_cache'			, 'rocket_clean_post' );
add_action( 'wp_update_comment_count'	, 'rocket_clean_post' );

/**
 * Add pattern to clean files of connected users
 *
 * @since 2.0
 *
 * @param array $urls An array of URLs to clean.
 * @return array An array of pattern to use for clearing the cache
 */
function rocket_clean_files_users( $urls ) {
	$pattern_urls = array();
	foreach ( $urls as $url ) {
		list( $host, $path, $scheme ) = get_rocket_parse_url( $url );
		$pattern_urls[] = $scheme . '://' . $host . '*' . $path;
	}
	return $pattern_urls;
}
add_filter( 'rocket_clean_files', 'rocket_clean_files_users' );

/**
 * Return all translated version of a post when qTranslate is used.
 * Use the "rocket_post_purge_urls" filter to insert URLs of traduction post
 *
 * @since 1.3.5
 *
 * @param array $urls An array of URLs to clean.
 * @return array Updated array of URLs to clean
 */
function rocket_post_purge_urls_for_qtranslate( $urls ) {
	if ( rocket_is_plugin_active( 'qtranslate/qtranslate.php' ) || rocket_is_plugin_active( 'qtranslate-x/qtranslate.php' ) ) {

		global $q_config;

		// Get all languages.
		$enabled_languages = $q_config['enabled_languages'];

		// Remove default language.
		$enabled_languages = array_diff( $enabled_languages, array( $q_config['default_language'] ) );

		// Add translate URLs.
		foreach ( $urls as $url ) {
			foreach ( $enabled_languages as $lang ) {
				if ( rocket_is_plugin_active( 'qtranslate/qtranslate.php' ) ) {
				    $urls[] = qtrans_convertURL( $url, $lang, true );
				} elseif ( rocket_is_plugin_active( 'qtranslate-x/qtranslate.php' ) ) {
					$urls[] = qtranxf_convertURL( $url, $lang, true );
				}
			}
		}
	}

	return $urls;
}
add_filter( 'rocket_post_purge_urls', 'rocket_post_purge_urls_for_qtranslate' );

/**
 * Actions to be done after the purge cache files of a post
 * By Default, this hook call the WP Rocket Bot (cache json)
 *
 * @since 1.3.0
 *
 * @param object $post The post object.
 * @param array  $purge_urls An array of URLs to clean.
 * @param string $lang The language to clean.
 */
function run_rocket_bot_after_clean_post( $post, $purge_urls, $lang ) {
	// Run robot only if post is published.
	if ( 'publish' !== $post->post_status ) {
		return false;
	}

	// Add Homepage URL to $purge_urls for bot crawl.
	array_push( $purge_urls, get_rocket_i18n_home_url( $lang ) );

	// Add default WordPress feeds (posts & comments).
	array_push( $purge_urls, get_feed_link() );
	array_push( $purge_urls, get_feed_link( 'comments_' ) );

	// Get the author page.
	$purge_author = array( get_author_posts_url( $post->post_author ) );

	// Get all dates archive page.
	$purge_dates = get_rocket_post_dates_urls( $post->ID );

	// Remove dates archives page and author page to preload cache.
	$purge_urls = array_diff( $purge_urls, $purge_dates, $purge_author );

	// Create json file and run WP Rocket Bot.
	$json_encode_urls = '["' . implode( '","', array_filter( $purge_urls ) ) . '"]';
	if ( rocket_put_content( WP_ROCKET_PATH . 'cache.json', $json_encode_urls ) ) {
		global $do_rocket_bot_cache_json;
		$do_rocket_bot_cache_json = true;
	}
}
add_action( 'after_rocket_clean_post', 'run_rocket_bot_after_clean_post', 10, 3 );

/**
 * Actions to be done after the purge cache files of a term
 * By Default, this hook call the WP Rocket Bot (cache json)
 *
 * @since 2.6.8
 *
 * @param object $post The post object.
 * @param array  $purge_urls An array of URLs to clean.
 * @param string $lang The language to clean.
 */
function run_rocket_bot_after_clean_term( $post, $purge_urls, $lang ) {
	// Add Homepage URL to $purge_urls for bot crawl.
	array_push( $purge_urls, get_rocket_i18n_home_url( $lang ) );

	// Create json file and run WP Rocket Bot.
	$json_encode_urls = '["' . implode( '","', array_filter( $purge_urls ) ) . '"]';
	if ( rocket_put_content( WP_ROCKET_PATH . 'cache.json', $json_encode_urls ) ) {
		global $do_rocket_bot_cache_json;
		$do_rocket_bot_cache_json = true;
	}
}
add_action( 'after_rocket_clean_term', 'run_rocket_bot_after_clean_term', 10, 3 );

/**
 * Run WP Rocket Bot when a post is added, updated or deleted
 *
 * @since 1.3.2
 */
function do_rocket_bot_cache_json() {
	global $do_rocket_bot_cache_json;
	if ( $do_rocket_bot_cache_json ) {
		run_rocket_preload_cache( 'cache-json', false );
	}
}
add_action( 'shutdown', 'do_rocket_bot_cache_json' );

/**
 * Purge Cache file System in Admin Bar
 *
 * @since 1.3.0 Compatibility with WPML
 * @since 1.0
 */
function do_admin_post_rocket_purge_cache() {
	if ( isset( $_GET['type'], $_GET['_wpnonce'] ) ) {

		$_type     = explode( '-', $_GET['type'] );
		$_type     = reset( $_type );
		$_id       = explode( '-', $_GET['type'] );
		$_id       = end( $_id );
		$_taxonomy = isset( $_GET['taxonomy'] ) ? $_GET['taxonomy'] : false;

		if ( ! wp_verify_nonce( $_GET['_wpnonce'], 'purge_cache_' . $_GET['type'] ) ) {
			wp_nonce_ays( '' );
		}

		switch ( $_type ) {

			// Clear all cache domain.
			case 'all':

				// Remove all cache files.
				$lang = isset( $_GET['lang'] ) && 'all' !== $_GET['lang'] ? sanitize_key( $_GET['lang'] ) : '';
				// Remove all cache files.
				rocket_clean_domain( $lang );

				// Remove all minify cache files.
				rocket_clean_minify();

				// Remove cache busting files.
				rocket_clean_cache_busting();

				// Generate a new random key for minify cache file.
				$options = get_option( WP_ROCKET_SLUG );
				$options['minify_css_key'] = create_rocket_uniqid();
				$options['minify_js_key'] = create_rocket_uniqid();
				remove_all_filters( 'update_option_' . WP_ROCKET_SLUG );
				update_option( WP_ROCKET_SLUG, $options );

				rocket_dismiss_box( 'rocket_warning_plugin_modification' );
				break;

			// Clear terms, homepage and other files associated at current post in back-end.
			case 'post':
				rocket_clean_post( $_id );
				break;

			// Clear a specific term.
			case 'term':
				rocket_clean_term( $_id, $_taxonomy );
				break;

			// Clear a specific user.
			case 'user':
				rocket_clean_user( $_id );
				break;

			// Clear cache file of the current page in front-end.
			case 'url':
			    $referer = wp_get_referer();

			    if ( 0 !== strpos( $referer, 'http' ) ) {
				    list( $host, $path, $scheme, $query ) = get_rocket_parse_url( untrailingslashit( home_url() ) );
					$referer = $scheme . '://' . $host . $referer;
				}

				if ( home_url( '/' ) === $referer ) {
					rocket_clean_home();
				} else {
					rocket_clean_files( $referer );
				}
				break;

			default:
				wp_nonce_ays( '' );
				break;
		}

		wp_redirect( wp_get_referer() );
		die();
	}
}
add_action( 'admin_post_purge_cache', 'do_admin_post_rocket_purge_cache' );

/**
 * Purge OPCache content in Admin Bar
 *
 * @since 2.7
 */
function do_admin_post_rocket_purge_opcache() {
	if ( ! isset( $_GET['_wpnonce'] ) || ! wp_verify_nonce( $_GET['_wpnonce'], 'rocket_purge_opcache' ) ) {
		wp_nonce_ays( '' );
	}

	if ( function_exists( 'opcache_reset' ) ) {
		@opcache_reset();
	}

	wp_redirect( wp_get_referer() );
	die();
}
add_action( 'admin_post_rocket_purge_opcache', 'do_admin_post_rocket_purge_opcache' );

/**
 * Preload cache system in Admin Bar
 * It launch the WP Rocket Bot
 *
 * @since 1.3.0 Compatibility with WPML
 * @since 1.0 (delete in 1.1.6 and re-add in 1.1.9)
 */
function do_admin_post_rocket_preload_cache() {
	if ( isset( $_GET['_wpnonce'] ) ) {

		if ( ! wp_verify_nonce( $_GET['_wpnonce'], 'preload' ) ) {
			wp_nonce_ays( '' );
		}

		$lang = isset( $_GET['lang'] ) && 'all' !== $_GET['lang'] ? sanitize_key( $_GET['lang'] ) : '';
		run_rocket_preload_cache( 'cache-preload' );

		wp_redirect( wp_get_referer() );
		die();
	}
}
add_action( 'admin_post_preload',        'do_admin_post_rocket_preload_cache' );
add_action( 'admin_post_nopriv_preload', 'do_admin_post_rocket_preload_cache' );

/**
 * Purge CloudFlare cache
 *
 * @since 2.5
 */
function do_admin_post_rocket_purge_cloudflare() {
	if ( ! isset( $_GET['_wpnonce'] ) || ! wp_verify_nonce( $_GET['_wpnonce'], 'rocket_purge_cloudflare' ) ) {
		wp_nonce_ays( '' );
	}

	// Purge CloudFlare.
	$cf_purge = rocket_purge_cloudflare();

	if ( is_wp_error( $cf_purge ) ) {
		$cf_purge_result = array( 'result' => 'error', 'message' => sprintf( __( 'CloudFlare Cache purge error: %s', 'rocket' ), $cf_purge->get_error_message() ) );
	} else {
		$cf_purge_result = array( 'result' => 'success', 'message' => __( 'CloudFlare cache sucessfully purged', 'rocket' ) );
	}

	set_transient( $GLOBALS['current_user']->ID . '_cloudflare_purge_result', $cf_purge_result );

	wp_redirect( wp_get_referer() );
	die();
}
add_action( 'admin_post_rocket_purge_cloudflare', 'do_admin_post_rocket_purge_cloudflare' );
