BuddyPress - Read all notifications buton

bp-read-all-notifications.php

<?php 

/**
 * Class MC_BP_Notifications
 * Handle the read all notifications without post / get method, based on unread notifications
 *
 * To be used in HTML : <a href="<?php echo Wide_Notifications::mark_notifications_as_read_url(); ?>">Read all notifications</a>
 *
 * @author Maxime CULEA
 */
class MC_BP_Notifications {
	function init() {
		add_action( 'bp_actions', [ $this, 'mark_notifications_as_read_action' ] );
	}

	/**
	 * Generate the url for marking all user's notifications to read
	 * @see    bp_get_the_message_thread_mark_read_url()
	 * @see    bp_notifications_action_bulk_manage()
	 *
	 * @author Maxime CULEA
	 *
	 * @return string
	 */
	public static function mark_notifications_as_read_url() {
		$notifications = self::get_new_notifications();
		if ( empty( $notifications ) ) {
			return '';
		}

		// Add the args to the URL.
		$url = add_query_arg( [ 'notification_bulk_action' => 'mc_bp_read_all' ], bp_get_notifications_read_permalink( get_current_user_id() ) );

		// Add the nonce.
		return wp_nonce_url( $url, 'mc_bp_read_all', 'notification_bulk_nonce' );
	}

	/**
	 * Manage to mark all notification as read
	 * @see    bp_notifications_action_bulk_manage()
	 *
	 * @author Maxime CULEA
	 *
	 * @return bool
	 */
	public function mark_notifications_as_read_action() {
		if ( ! bp_is_notifications_component() || ( ! bp_is_current_action( 'read' ) || bp_is_current_action( 'unread' ) ) ) {
			return false;
		}

		$action = $_GET['notification_bulk_action'] ?: '';
		$nonce  = $_GET['notification_bulk_nonce'] ?: '';
		if ( 'mc_bp_read_all' !== $action || empty( $nonce ) ) {
			return false;
		}

		if ( ! wp_verify_nonce( $nonce, 'mc_bp_read_all' ) ) {
			bp_core_add_message( __( 'There was a problem managing your notifications.', 'buddypress' ), 'error' );
			return false;
		}

		$notification_ids = self::get_new_notifications();
		foreach ( $notification_ids as $notification_id ) {
			bp_notifications_mark_notification( $notification_id, false );
		}
		bp_core_add_message( __( 'Notifications marked as read', 'buddypress' ) );

		bp_core_redirect( bp_displayed_user_domain() . bp_get_notifications_slug() . '/' . bp_current_action() . '/' );
	}

	/**
	 * Get current user new notifications
	 *
	 * @author Maxime CULEA
	 *
	 * @return array
	 */
	private static function get_new_notifications() {
		if ( ! class_exists( 'BP_Notifications_Notification' ) ) {
			return [];
		}
		
		$notifications = BP_Notifications_Notification::get( [
			'user_id' => get_current_user_id(),
			'is_new'  => true,
		] );

		return empty( $notifications ) ? [] : wp_list_pluck( $notifications, 'id' );
	}
}
$mc_bp_n = new MC_BP_Notifications();
$mc_bp_n->init();