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<?php /** * WPSEO plugin file. * * @package WPSEO\Admin\Notifications */
/** * Handles notifications storage and display. */ class Yoast_Notification_Center {
/** * Option name to store notifications on. * * @var string */ const STORAGE_KEY = 'yoast_notifications';
/** * The singleton instance of this object. * * @var \Yoast_Notification_Center */ private static $instance = null;
/** * @var \Yoast_Notification[] */ private $notifications = array();
/** * Notifications there are newly added. * * @var array */ private $new = array();
/** * Notifications that were resolved this execution. * * @var array */ private $resolved = 0;
/** * Internal storage for transaction before notifications have been retrieved from storage. * * @var array */ private $queued_transactions = array();
/** * Internal flag for whether notifications have been retrieved from storage. * * @var bool */ private $notifications_retrieved = false;
/** * Construct. */ private function __construct() {
add_action( 'init', array( $this, 'setup_current_notifications' ), 1 );
add_action( 'all_admin_notices', array( $this, 'display_notifications' ) );
add_action( 'wp_ajax_yoast_get_notifications', array( $this, 'ajax_get_notifications' ) );
add_action( 'wpseo_deactivate', array( $this, 'deactivate_hook' ) ); add_action( 'shutdown', array( $this, 'update_storage' ) ); }
/** * Singleton getter. * * @return Yoast_Notification_Center */ public static function get() {
if ( null === self::$instance ) { self::$instance = new self(); }
return self::$instance; }
/** * Dismiss a notification. */ public static function ajax_dismiss_notification() {
$notification_center = self::get();
$notification_id = filter_input( INPUT_POST, 'notification' ); if ( empty( $notification_id ) ) { die( '-1' ); }
$notification = $notification_center->get_notification_by_id( $notification_id ); if ( false === ( $notification instanceof Yoast_Notification ) ) {
// Permit legacy. $options = array( 'id' => $notification_id, 'dismissal_key' => $notification_id, ); $notification = new Yoast_Notification( '', $options ); }
if ( self::maybe_dismiss_notification( $notification ) ) { die( '1' ); }
die( '-1' ); }
/** * Check if the user has dismissed a notification. * * @param Yoast_Notification $notification The notification to check for dismissal. * @param null|int $user_id User ID to check on. * * @return bool */ public static function is_notification_dismissed( Yoast_Notification $notification, $user_id = null ) {
$user_id = ( ! is_null( $user_id ) ? $user_id : get_current_user_id() ); $dismissal_key = $notification->get_dismissal_key();
// This checks both the site-specific user option and the meta value. $current_value = get_user_option( $dismissal_key, $user_id );
// Migrate old user meta to user option on-the-fly. if ( ! empty( $current_value ) && metadata_exists( 'user', $user_id, $dismissal_key ) && update_user_option( $user_id, $dismissal_key, $current_value ) ) { delete_user_meta( $user_id, $dismissal_key ); }
return ! empty( $current_value ); }
/** * Check if the nofitication is being dismissed. * * @param string|Yoast_Notification $notification Notification to check dismissal of. * @param string $meta_value Value to set the meta value to if dismissed. * * @return bool True if dismissed. */ public static function maybe_dismiss_notification( Yoast_Notification $notification, $meta_value = 'seen' ) {
// Only persistent notifications are dismissible. if ( ! $notification->is_persistent() ) { return false; }
// If notification is already dismissed, we're done. if ( self::is_notification_dismissed( $notification ) ) { return true; }
$dismissal_key = $notification->get_dismissal_key(); $notification_id = $notification->get_id();
$is_dismissing = ( $dismissal_key === self::get_user_input( 'notification' ) ); if ( ! $is_dismissing ) { $is_dismissing = ( $notification_id === self::get_user_input( 'notification' ) ); }
// Fallback to ?dismissal_key=1&nonce=bla when JavaScript fails. if ( ! $is_dismissing ) { $is_dismissing = ( '1' === self::get_user_input( $dismissal_key ) ); }
if ( ! $is_dismissing ) { return false; }
$user_nonce = self::get_user_input( 'nonce' ); if ( false === wp_verify_nonce( $user_nonce, $notification_id ) ) { return false; }
return self::dismiss_notification( $notification, $meta_value ); }
/** * Dismisses a notification. * * @param Yoast_Notification $notification Notification to dismiss. * @param string $meta_value Value to save in the dismissal. * * @return bool True if dismissed, false otherwise. */ public static function dismiss_notification( Yoast_Notification $notification, $meta_value = 'seen' ) { // Dismiss notification. return update_user_option( get_current_user_id(), $notification->get_dismissal_key(), $meta_value ) !== false; }
/** * Restores a notification. * * @param Yoast_Notification $notification Notification to restore. * * @return bool True if restored, false otherwise. */ public static function restore_notification( Yoast_Notification $notification ) {
$user_id = get_current_user_id(); $dismissal_key = $notification->get_dismissal_key();
// Restore notification. $restored = delete_user_option( $user_id, $dismissal_key );
// Delete unprefixed user meta too for backward-compatibility. if ( metadata_exists( 'user', $user_id, $dismissal_key ) ) { $restored = delete_user_meta( $user_id, $dismissal_key ) && $restored; }
return $restored; }
/** * Clear dismissal information for the specified Notification. * * When a cause is resolved, the next time it is present we want to show * the message again. * * @param string|Yoast_Notification $notification Notification to clear the dismissal of. * * @return bool */ public function clear_dismissal( $notification ) {
global $wpdb;
if ( $notification instanceof Yoast_Notification ) { $dismissal_key = $notification->get_dismissal_key(); }
if ( is_string( $notification ) ) { $dismissal_key = $notification; }
if ( empty( $dismissal_key ) ) { return false; }
// Remove notification dismissal for all users. $deleted = delete_metadata( 'user', 0, $wpdb->get_blog_prefix() . $dismissal_key, '', true );
// Delete unprefixed user meta too for backward-compatibility. $deleted = delete_metadata( 'user', 0, $dismissal_key, '', true ) || $deleted;
return $deleted; }
/** * Retrieves notifications from the storage and merges in previous notification changes. * * The current user in WordPress is not loaded shortly before the 'init' hook, but the plugin * sometimes needs to add or remove notifications before that. In such cases, the transactions * are not actually executed, but added to a queue. That queue is then handled in this method, * after notifications for the current user have been set up. * * @return void */ public function setup_current_notifications() { $this->retrieve_notifications_from_storage();
foreach ( $this->queued_transactions as $transaction ) { list( $callback, $args ) = $transaction;
call_user_func_array( $callback, $args ); }
$this->queued_transactions = array(); }
/** * Add notification to the cookie. * * @param Yoast_Notification $notification Notification object instance. */ public function add_notification( Yoast_Notification $notification ) {
$callback = array( $this, __METHOD__ ); $args = func_get_args(); if ( $this->queue_transaction( $callback, $args ) ) { return; }
// Don't add if the user can't see it. if ( ! $notification->display_for_current_user() ) { return; }
$notification_id = $notification->get_id();
// Empty notifications are always added. if ( $notification_id !== '' ) {
// If notification ID exists in notifications, don't add again. $present_notification = $this->get_notification_by_id( $notification_id ); if ( ! is_null( $present_notification ) ) { $this->remove_notification( $present_notification, false ); }
if ( is_null( $present_notification ) ) { $this->new[] = $notification_id; } }
// Add to list. $this->notifications[] = $notification; }
/** * Get the notification by ID. * * @param string $notification_id The ID of the notification to search for. * * @return null|Yoast_Notification */ public function get_notification_by_id( $notification_id ) {
foreach ( $this->notifications as & $notification ) { if ( $notification_id === $notification->get_id() ) { return $notification; } }
return null; }
/** * Display the notifications. * * @param bool $echo_as_json True when notifications should be printed directly. * * @return void */ public function display_notifications( $echo_as_json = false ) {
// Never display notifications for network admin. if ( function_exists( 'is_network_admin' ) && is_network_admin() ) { return; }
$sorted_notifications = $this->get_sorted_notifications(); $notifications = array_filter( $sorted_notifications, array( $this, 'is_notification_persistent' ) );
if ( empty( $notifications ) ) { return; }
array_walk( $notifications, array( $this, 'remove_notification' ) );
$notifications = array_unique( $notifications ); if ( $echo_as_json ) { $notification_json = array();
/** * @var Yoast_Notification[] $notifications */ foreach ( $notifications as $notification ) { $notification_json[] = $notification->render(); }
echo WPSEO_Utils::format_json_encode( $notification_json );
return; }
foreach ( $notifications as $notification ) { echo $notification; } }
/** * Remove notification after it has been displayed. * * @param Yoast_Notification $notification Notification to remove. * @param bool $resolve Resolve as fixed. */ public function remove_notification( Yoast_Notification $notification, $resolve = true ) {
$callback = array( $this, __METHOD__ ); $args = func_get_args(); if ( $this->queue_transaction( $callback, $args ) ) { return; }
$index = false;
// Match persistent Notifications by ID, non persistent by item in the array. if ( $notification->is_persistent() ) { foreach ( $this->notifications as $current_index => $present_notification ) { if ( $present_notification->get_id() === $notification->get_id() ) { $index = $current_index; break; } } } else { $index = array_search( $notification, $this->notifications, true ); }
if ( false === $index ) { return; }
if ( $notification->is_persistent() && $resolve ) { $this->resolved++; $this->clear_dismissal( $notification ); }
unset( $this->notifications[ $index ] ); $this->notifications = array_values( $this->notifications ); }
/** * Removes a notification by its ID. * * @param string $notification_id The notification id. * @param bool $resolve Resolve as fixed. * * @return void */ public function remove_notification_by_id( $notification_id, $resolve = true ) { $notification = $this->get_notification_by_id( $notification_id );
if ( $notification === null ) { return; }
$this->remove_notification( $notification, $resolve ); }
/** * Get the notification count. * * @param bool $dismissed Count dismissed notifications. * * @return int Number of notifications */ public function get_notification_count( $dismissed = false ) {
$notifications = $this->get_notifications(); $notifications = array_filter( $notifications, array( $this, 'filter_persistent_notifications' ) );
if ( ! $dismissed ) { $notifications = array_filter( $notifications, array( $this, 'filter_dismissed_notifications' ) ); }
return count( $notifications ); }
/** * Get the number of notifications resolved this execution. * * These notifications have been resolved and should be counted when active again. * * @return int */ public function get_resolved_notification_count() {
return $this->resolved; }
/** * Return the notifications sorted on type and priority. * * @return array|Yoast_Notification[] Sorted Notifications */ public function get_sorted_notifications() {
$notifications = $this->get_notifications(); if ( empty( $notifications ) ) { return array(); }
// Sort by severity, error first. usort( $notifications, array( $this, 'sort_notifications' ) );
return $notifications; }
/** * AJAX display notifications. */ public function ajax_get_notifications() { $echo = filter_input( INPUT_POST, 'version' ) === '2';
// Display the notices. $this->display_notifications( $echo );
// AJAX die. exit; }
/** * Remove storage when the plugin is deactivated. */ public function deactivate_hook() {
$this->clear_notifications(); }
/** * Save persistent notifications to storage. * * We need to be able to retrieve these so they can be dismissed at any time during the execution. * * @since 3.2 * * @return void */ public function update_storage() {
$notifications = $this->get_notifications();
/** * Filter: 'yoast_notifications_before_storage' - Allows developer to filter notifications before saving them. * * @api Yoast_Notification[] $notifications */ $notifications = apply_filters( 'yoast_notifications_before_storage', $notifications );
// No notifications to store, clear storage if it was previously present. if ( empty( $notifications ) ) { $this->remove_storage();
return; }
$notifications = array_map( array( $this, 'notification_to_array' ), $notifications );
// Save the notifications to the storage. update_user_option( get_current_user_id(), self::STORAGE_KEY, $notifications ); }
/** * Provide a way to verify present notifications. * * @return array|Yoast_Notification[] Registered notifications. */ public function get_notifications() {
return $this->notifications; }
/** * Get newly added notifications. * * @return array */ public function get_new_notifications() {
return array_map( array( $this, 'get_notification_by_id' ), $this->new ); }
/** * Get information from the User input. * * @param string $key Key to retrieve. * * @return mixed value of key if set. */ private static function get_user_input( $key ) {
$filter_input_type = INPUT_GET;
if ( isset( $_SERVER['REQUEST_METHOD'] ) && 'POST' === strtoupper( wp_unslash( $_SERVER['REQUEST_METHOD'] ) ) ) { $filter_input_type = INPUT_POST; }
return filter_input( $filter_input_type, $key ); }
/** * Retrieve the notifications from storage. * * @return array|void Yoast_Notification[] Notifications. */ private function retrieve_notifications_from_storage() {
if ( $this->notifications_retrieved ) { return; }
$this->notifications_retrieved = true;
$stored_notifications = get_user_option( self::STORAGE_KEY, get_current_user_id() );
// Check if notifications are stored. if ( empty( $stored_notifications ) ) { return; }
if ( is_array( $stored_notifications ) ) { $notifications = array_map( array( $this, 'array_to_notification' ), $stored_notifications ); // Apply array_values to ensure we get a 0-indexed array. $notifications = array_values( array_filter( $notifications, array( $this, 'filter_notification_current_user' ) ) );
$this->notifications = $notifications; } }
/** * Sort on type then priority. * * @param Yoast_Notification $a Compare with B. * @param Yoast_Notification $b Compare with A. * * @return int 1, 0 or -1 for sorting offset. */ private function sort_notifications( Yoast_Notification $a, Yoast_Notification $b ) {
$a_type = $a->get_type(); $b_type = $b->get_type();
if ( $a_type === $b_type ) { return WPSEO_Utils::calc( $b->get_priority(), 'compare', $a->get_priority() ); }
if ( 'error' === $a_type ) { return -1; }
if ( 'error' === $b_type ) { return 1; }
return 0; }
/** * Clear local stored notifications. */ private function clear_notifications() {
$this->notifications = array(); $this->notifications_retrieved = false; }
/** * Filter out non-persistent notifications. * * @param Yoast_Notification $notification Notification to test for persistent. * * @since 3.2 * * @return bool */ private function filter_persistent_notifications( Yoast_Notification $notification ) {
return $notification->is_persistent(); }
/** * Filter out dismissed notifications. * * @param Yoast_Notification $notification Notification to check. * * @return bool */ private function filter_dismissed_notifications( Yoast_Notification $notification ) {
return ! $this->maybe_dismiss_notification( $notification ); }
/** * Convert Notification to array representation. * * @param Yoast_Notification $notification Notification to convert. * * @since 3.2 * * @return array */ private function notification_to_array( Yoast_Notification $notification ) {
$notification_data = $notification->to_array();
if ( isset( $notification_data['nonce'] ) ) { unset( $notification_data['nonce'] ); }
return $notification_data; }
/** * Convert stored array to Notification. * * @param array $notification_data Array to convert to Notification. * * @return Yoast_Notification */ private function array_to_notification( $notification_data ) {
if ( isset( $notification_data['options']['nonce'] ) ) { unset( $notification_data['options']['nonce'] ); }
return new Yoast_Notification( $notification_data['message'], $notification_data['options'] ); }
/** * Filter notifications that should not be displayed for the current user. * * @param Yoast_Notification $notification Notification to test. * * @return bool */ private function filter_notification_current_user( Yoast_Notification $notification ) { return $notification->display_for_current_user(); }
/** * Checks if given notification is persistent. * * @param Yoast_Notification $notification The notification to check. * * @return bool True when notification is not persistent. */ private function is_notification_persistent( Yoast_Notification $notification ) { return ! $notification->is_persistent(); }
/** * Queues a notification transaction for later execution if notifications are not yet set up. * * @param callable $callback Callback that performs the transaction. * @param array $args Arguments to pass to the callback. * * @return bool True if transaction was queued, false if it can be performed immediately. */ private function queue_transaction( $callback, $args ) { if ( $this->notifications_retrieved ) { return false; }
$this->add_transaction_to_queue( $callback, $args );
return true; }
/** * Adds a notification transaction to the queue for later execution. * * @param callable $callback Callback that performs the transaction. * @param array $args Arguments to pass to the callback. */ private function add_transaction_to_queue( $callback, $args ) { $this->queued_transactions[] = array( $callback, $args ); }
/** * Removes all notifications from storage. * * @return bool True when notifications got removed. */ protected function remove_storage() { if ( ! $this->has_stored_notifications() ) { return false; }
delete_user_option( get_current_user_id(), self::STORAGE_KEY ); return true; }
/** * Checks if there are stored notifications. * * @return bool True when there are stored notifications. */ protected function has_stored_notifications() { $stored_notifications = $this->get_stored_notifications();
return ! empty( $stored_notifications ); }
/** * Retrieves the stored notifications. * * @codeCoverageIgnore * * @return array|false Array with notifications or false when not set. */ protected function get_stored_notifications() { return get_user_option( self::STORAGE_KEY, get_current_user_id() ); } }
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