<?php
/*
Plugin Name: Responsive Lightbox & Gallery
Description: Responsive Lightbox & Gallery allows users to create galleries and view larger versions of images, galleries and videos in a lightbox (overlay) effect optimized for mobile devices.
Version: 2.7.9
Requires at least: 6.4
Requires PHP: 7.4
Author: dFactory
Author URI: http://www.dfactory.co/
Plugin URI: http://www.dfactory.co/products/responsive-lightbox/
License: MIT License
License URI: http://opensource.org/licenses/MIT
Text Domain: responsive-lightbox
Domain Path: /languages

Responsive Lightbox & Gallery
Copyright (C) 2013-2026, Digital Factory - info@digitalfactory.pl

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

// exit if accessed directly
if ( ! defined( 'ABSPATH' ) )
	exit;

define( 'RESPONSIVE_LIGHTBOX_URL', plugins_url( '', __FILE__ ) );
define( 'RESPONSIVE_LIGHTBOX_PATH', plugin_dir_path( __FILE__ ) );
define( 'RESPONSIVE_LIGHTBOX_BASENAME', plugin_basename( __FILE__ ) );
define( 'RESPONSIVE_LIGHTBOX_REL_PATH', dirname( RESPONSIVE_LIGHTBOX_BASENAME ) . DIRECTORY_SEPARATOR );

include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes' . DIRECTORY_SEPARATOR . 'class-fast-image.php' );
include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes' . DIRECTORY_SEPARATOR . 'class-galleries.php' );
include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes' . DIRECTORY_SEPARATOR . 'class-folders.php' );
include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes' . DIRECTORY_SEPARATOR . 'class-frontend.php' );
include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes' . DIRECTORY_SEPARATOR . 'class-settings-data.php' );
include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes' . DIRECTORY_SEPARATOR . 'class-settings.php' );
include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes' . DIRECTORY_SEPARATOR . 'class-tour.php' );
include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes' . DIRECTORY_SEPARATOR . 'class-welcome.php' );
include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes' . DIRECTORY_SEPARATOR . 'class-widgets.php' );
include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes' . DIRECTORY_SEPARATOR . 'functions.php' );

/**
 * Responsive Lightbox class.
 *
 * @class Responsive_Lightbox
 * @version	2.7.9
 */
class Responsive_Lightbox {

	public $defaults = [
		'settings' => [
			'tour'							=> true,
			'script'						=> 'glightbox',
			'selector'						=> 'lightbox',
			'default_gallery'				=> 'default',
			'builder_gallery'				=> 'basicgrid',
			'default_woocommerce_gallery'	=> 'default',
			'galleries'						=> true,
			'gallery_image_size'			=> 'full',
			'gallery_image_title'			=> 'default',
			'gallery_image_caption'			=> 'default',
			'force_custom_gallery'			=> false,
			'woocommerce_gallery_lightbox'	=> false,
			'videos'						=> true,
			'widgets'						=> false,
			'comments'						=> false,
			'image_links'					=> true,
			'image_title'					=> 'default',
			'image_caption'					=> 'default',
			'images_as_gallery'				=> false,
			'deactivation_delete'			=> false,
			'loading_place'					=> 'header',
			'conditional_loading'			=> false,
			'enable_custom_events'			=> false,
			'custom_events'					=> 'ajaxComplete',
			'update_version'				=> 1,
			'update_notice'				=> true,
			'update_delay_date'			=> 0,
		],
		'builder' => [
			'gallery_builder'		=> true,
			'categories'			=> true,
			'tags'					=> true,
			'permalink'				=> 'rl_gallery',
			'permalink_categories'	=> 'rl_category',
			'permalink_tags'		=> 'rl_tag',
			'archives'				=> true,
			'archives_category'		=> 'all'
		],
		'configuration' => [
			'swipebox' => [
				'animation'					=> 'css',
				'force_png_icons'			=> false,
				'hide_close_mobile'			=> false,
				'remove_bars_mobile'		=> false,
				'hide_bars'					=> true,
				'hide_bars_delay'			=> 5000,
				'video_max_width'			=> 1080,
				'loop_at_end'				=> false
			],
			'prettyphoto' => [
				'animation_speed'			=> 'normal',
				'slideshow'					=> false,
				'slideshow_delay'			=> 5000,
				'slideshow_autoplay'		=> false,
				'opacity'					=> 75,
				'show_title'				=> true,
				'allow_resize'				=> true,
				'allow_expand'				=> true,
				'width'						=> 1080,
				'height'					=> 720,
				'separator'					=> '/',
				'theme'						=> 'pp_default',
				'horizontal_padding'		=> 20,
				'hide_flash'				=> false,
				'wmode'						=> 'opaque',
				'video_autoplay'			=> false,
				'modal'						=> false,
				'deeplinking'				=> false,
				'overlay_gallery'			=> true,
				'keyboard_shortcuts'		=> true,
				'social'					=> false
			],
			'nivo' => [
				'effect'					=> 'fade',
				'click_overlay_to_close'	=> true,
				'keyboard_nav'				=> true,
				'error_message'				=> 'The requested content cannot be loaded. Please try again later.'
			],
			'imagelightbox' => [
				'animation_speed'			=> 250,
				'preload_next'				=> true,
				'enable_keyboard'			=> true,
				'quit_on_end'				=> false,
				'quit_on_image_click'		=> false,
				'quit_on_document_click'	=> true
			],
			'tosrus' => [
				'effect'					=> 'slide',
				'infinite'					=> true,
				'keys'						=> false,
				'autoplay'					=> true,
				'pause_on_hover'			=> false,
				'timeout'					=> 4000,
				'pagination'				=> true,
				'pagination_type'			=> 'thumbnails',
				'close_on_click'			=> false
			],
			'featherlight' => [
				'open_speed'				=> 250,
				'close_speed'				=> 250,
				'close_on_click'			=> 'background',
				'close_on_esc'				=> true,
				'gallery_fade_in'			=> 100,
				'gallery_fade_out'			=> 300
			],
			'magnific' => [
				'disable_on'				=> 0,
				'mid_click'					=> true,
				'preloader'					=> true,
				'close_on_content_click'	=> true,
				'close_on_background_click'	=> true,
				'close_button_inside'		=> true,
				'show_close_button'			=> true,
				'enable_escape_key'			=> true,
				'align_top'					=> false,
				'fixed_content_position'	=> 'auto',
				'fixed_background_position'	=> 'auto',
				'auto_focus_last'			=> true
			],
			'glightbox' => [
				'slide_effect'				=> 'slide',
				'close_button'				=> true,
				'touch_navigation'			=> true,
				'keyboard_navigation'		=> true,
				'close_on_outside_click'	=> true,
				'loop'						=> false,
				'zoomable'					=> true
			]
		],
		'folders' => [
			'active'			=> true,
			'folders_source'	=> 'rl_media_folder',
			'media_taxonomy'	=> 'rl_media_folder',
			'custom_taxonomies'	=> [],
			'media_ui'			=> true,
			'media_tags'		=> false,
			'jstree_wholerow'	=> true,
			'show_in_menu'		=> false,
			'folders_removal'	=> true
		],
		'remote_library' => [
			'active'		=> true,
			'max_image_size'	=> 10,
			'caching'		=> false,
			'cache_expiry'	=> 1,
			'flickr'		=> [
				'active'	=> false,
				'api_key'	=> ''
			],
			'unsplash'		=> [
				'active'	=> false,
				'api_key'	=> ''
			],
			'wikimedia'		=> [
				'active'	=> true
			]
		],
		'capabilities' => [
			'active' => false,
			'roles' => [
				'administrator'	=> [
					'publish_galleries',
					'edit_galleries',
					'edit_published_galleries',
					'edit_others_galleries',
					'edit_private_galleries',
					'delete_galleries',
					'delete_published_galleries',
					'delete_others_galleries',
					'delete_private_galleries',
					'read_private_galleries',
					'manage_gallery_categories',
					'manage_gallery_tags',
					'edit_lightbox_settings'
				],
				'editor' => [
					'publish_galleries',
					'edit_galleries',
					'edit_published_galleries',
					'edit_others_galleries',
					'edit_private_galleries',
					'delete_galleries',
					'delete_published_galleries',
					'delete_others_galleries',
					'delete_private_galleries',
					'read_private_galleries',
					'manage_gallery_categories',
					'manage_gallery_tags'
				],
				'author' => [
					'publish_galleries',
					'edit_galleries',
					'edit_published_galleries',
					'delete_galleries',
					'delete_published_galleries'
				]
			]
		],
		'basicgrid_gallery'	=> [
			'columns_lg'		=> 4,
			'columns_md'		=> 3,
			'columns_sm'		=> 2,
			'columns_xs'		=> 1,
			'gutter'			=> 2,
			'force_height'		=> true,
			'row_height'		=> 150
		],
		'basicslider_gallery' => [
			'slider_type'			=> 'slide',
			'height'				=> 0,
			'width'					=> 0,
			'speed'					=> 400,
			'gap'					=> 20, // px
			'arrows_navigation'		=> true,
			'dots_navigation'		=> true,
			'drag'					=> true,
			'autoplay'				=> false,
			'interval'				=> 3000,
			'wheel'					=> false,
			'slides_per_page'		=> 1,
			'slides_per_move'		=> 1,
			'slides_start'			=> 0
		],
		'basicmasonry_gallery' => [
			'columns_lg'		=> 4,
			'columns_md'		=> 3,
			'columns_sm'		=> 2,
			'columns_xs'		=> 2,
			'gutter'			=> 20,
			'margin'			=> 20,
			'origin_left'		=> true,
			'origin_top'		=> true
		],
		'version' => '2.7.9',
		'activation_date' => ''
	];
	public $options = [];
	public $providers = [];
	private $capabilities = [
		'publish_galleries'				=> '',
		'edit_galleries'				=> '',
		'edit_published_galleries'		=> '',
		'edit_others_galleries'			=> '',
		'edit_private_galleries'		=> '',
		'delete_galleries'				=> '',
		'delete_published_galleries'	=> '',
		'delete_others_galleries'		=> '',
		'delete_private_galleries'		=> '',
		'read_private_galleries'		=> '',
		'manage_gallery_categories'		=> '',
		'manage_gallery_tags'			=> '',
		'edit_lightbox_settings'		=> ''
	];
	public $gallery_types = [];
	private $deactivaion_url = '';
	private $version = false;
	private $notices = [];
	private $current_script = 'glightbox';
	private static $_instance;
	const REWRITE_FLUSH_PENDING = 'responsive_lightbox_rewrite_flush_pending';

	// classes
	public $folders;
	public $frontend;
	public $galleries;
	public $multilang;
	public $remote_library;
	public $settings;
	public $settings_api;
	public $gallery_api;
	public $bulk_actions;

	/**
	 * Class constructor.
	 *
	 * @return void
	 */
	public function __construct() {
		register_activation_hook( __FILE__, [ $this, 'activation' ] );
		register_deactivation_hook( __FILE__, [ $this, 'deactivation' ] );

		// WordPress 6.4+ can fetch these non-autoloaded constructor options in one query.
		// Keep the function guard because supported older WordPress versions lack this helper.
		$option_names = [
			'responsive_lightbox_version',
			'rl_settings',
			'rl_configuration',
			'responsive_lightbox_capabilities',
			'responsive_lightbox_settings',
			'responsive_lightbox_folders',
			'responsive_lightbox_builder',
			'responsive_lightbox_remote_library',
			'responsive_lightbox_configuration',
			'responsive_lightbox_basicgrid_gallery',
			'responsive_lightbox_basicslider_gallery',
			'responsive_lightbox_basicmasonry_gallery'
		];
		if ( function_exists( 'wp_prime_option_caches' ) )
			wp_prime_option_caches( $option_names );

		// change from older versions
		$this->version = $db_version = get_option( 'responsive_lightbox_version' );

		// no version?
		if ( $db_version === false )
			$this->version = $db_version = '1.0.0';

		// 1.0.5 update
		if ( version_compare( $db_version, '1.0.5', '<' ) ) {
			if ( ( $array = get_option( 'rl_settings' ) ) !== false ) {
				update_option( 'responsive_lightbox_settings', $array );
				delete_option( 'rl_settings' );
			}

			if ( ( $array = get_option( 'rl_configuration' ) ) !== false ) {
				update_option( 'responsive_lightbox_configuration', $array );
				delete_option( 'rl_configuration' );
			}
		}

		$capabilities = get_option( 'responsive_lightbox_capabilities' );

		if ( empty( $capabilities ) )
			$capabilities = [];

		$array = get_option( 'responsive_lightbox_settings' );
		$this->options['settings'] = array_merge( $this->defaults['settings'], is_array( $array ) ? $array : [] );
		
		// load folders options with migration check
		$raw_folders = get_option( 'responsive_lightbox_folders', false );
		$raw_folders = is_array( $raw_folders ) ? $raw_folders : [];
		$this->options['folders'] = array_merge( $this->defaults['folders'], $raw_folders );
		
		// migrate existing users: detect if they're using custom taxonomy
		if ( ! isset( $raw_folders['folders_source'] ) && isset( $raw_folders['media_taxonomy'] ) && $raw_folders['media_taxonomy'] !== 'rl_media_folder' ) {
			$this->options['folders']['folders_source'] = 'custom_taxonomy';
			update_option( 'responsive_lightbox_folders', $this->options['folders'] );
		}
		
		$array = get_option( 'responsive_lightbox_builder' );
		$this->options['builder'] = array_merge( $this->defaults['builder'], is_array( $array ) ? $array : [] );
		$this->options['capabilities'] = array_merge( $this->defaults['capabilities'], is_array( $capabilities ) ? $capabilities : [] );
		$array = get_option( 'responsive_lightbox_remote_library' );
		$this->options['remote_library'] = array_merge( $this->defaults['remote_library'], is_array( $array ) ? $array : [] );

		// for multi arrays we have to merge them separately
		$base = get_option( 'responsive_lightbox_configuration' );
		$db_conf_opts = is_array( $base ) ? $base : [];

		foreach ( $this->defaults['configuration'] as $script => $settings ) {
			$script_options = ( isset( $db_conf_opts[$script] ) && is_array( $db_conf_opts[$script] ) ) ? $db_conf_opts[$script] : [];
			$this->options['configuration'][$script] = array_merge( $settings, $script_options );
		}

		// add default galleries options
		$array = get_option( 'responsive_lightbox_basicgrid_gallery', $this->defaults['basicgrid_gallery'] );
		$this->options['basicgrid_gallery'] = array_merge( $this->defaults['basicgrid_gallery'], is_array( $array ) ? $array : [] );
		$array = get_option( 'responsive_lightbox_basicslider_gallery', $this->defaults['basicslider_gallery'] );
		$this->options['basicslider_gallery'] = array_merge( $this->defaults['basicslider_gallery'], is_array( $array ) ? $array : [] );
		$array = get_option( 'responsive_lightbox_basicmasonry_gallery', $this->defaults['basicmasonry_gallery'] );
		$this->options['basicmasonry_gallery'] = array_merge( $this->defaults['basicmasonry_gallery'], is_array( $array ) ? $array : [] );

		// set current lightbox script
		$this->current_script = $this->options['settings']['script'];

		// initialize folders class early
		$this->folders = new Responsive_Lightbox_Folders( $this );

		// actions
		add_action( 'upgrader_process_complete', [ $this, 'update_plugin' ], 10, 2 );
		add_action( 'plugins_loaded', [ $this, 'plugins_loaded_init' ] );
		add_action( 'in_admin_header', [ $this, 'display_breadcrumbs' ] );
		add_action( 'after_setup_theme', [ $this, 'init_remote_libraries' ], 11 );
		add_action( 'init', [ $this, 'load_textdomain' ] );
		add_action( 'init', [ $this, 'init_galleries' ] );
		add_action( 'init', [ $this, 'flush_deferred_rewrite_rules' ], 20 );
		add_action( 'init', [ $this->folders, 'init_folders' ], 99 );
		add_action( 'init', [ $this, 'init_gutenberg' ] );
		add_action( 'admin_init', [ $this, 'update_notice' ] );
		add_action( 'wp_enqueue_scripts', [ $this, 'front_scripts_styles' ] );
		add_action( 'admin_enqueue_scripts', [ $this, 'admin_scripts_styles' ] );
		add_action( 'sidebar_admin_setup', [ $this, 'sidebar_admin_setup' ] );
		add_action( 'admin_footer', [ $this, 'modal_deactivation_template' ] );
		add_action( 'wp_ajax_rl_dismiss_notice', [ $this, 'dismiss_notice' ] );
		add_action( 'wp_ajax_rl-deactivate-plugin', [ $this, 'deactivate_plugin' ] );

		// filters
		add_filter( 'plugin_action_links_' . RESPONSIVE_LIGHTBOX_BASENAME, [ $this, 'plugin_settings_link' ], 10, 2 );
		add_filter( 'plugin_row_meta', [ $this, 'plugin_extend_links' ], 10, 2 );
	}

	/**
	 * Disable object cloning.
	 */
	public function __clone() {}

	/**
	 * Disable unserializing of the class.
	 */
	public function __wakeup() {}

	/**
	 * Get class data.
	 *
	 * @param string $attr
	 * @return mixed
	 */
	public function get_data( $attr ) {
		return property_exists( $this, $attr ) ? $this->{$attr} : null;
	}

	/**
	 * Get current lightbox script.
	 *
	 * @param string $attr
	 * @return mixed
	 */
	function get_lightbox_script() {
		return $this->get_data( 'current_script' );
	}

	/**
	 * Main Responsive Lightbox instance.
	 *
	 * @return object
	 */
	public static function instance() {
		if ( self::$_instance === null )
			self::$_instance = new self();

		return self::$_instance;
	}

	/**
	 * Plugin activation.
	 *
	 * @global object $wpdb
	 *
	 * @param bool $network
	 * @return void
	 */
	public function activation( $network ) {
		// network activation?
		if ( is_multisite() && $network ) {
			global $wpdb;

			// get all available sites
			$blogs_ids = $wpdb->get_col( 'SELECT blog_id FROM ' . $wpdb->blogs );

			foreach ( $blogs_ids as $blog_id ) {
				// change to another site
				switch_to_blog( (int) $blog_id );

				try {
					// run current site activation process
					$this->activate_site();
				} finally {
					restore_current_blog();
				}
			}
		} else
			$this->activate_site();
	}

	/**
	 * Single site activation.
	 *
	 * @return void
	 */
	public function activate_site() {
		// transient for welcome screen
		if ( get_option( 'responsive_lightbox_activation_date', false ) === false )
			set_transient( 'rl_activation_redirect', 1, 3600 );
		elseif ( $this->version !== false ) {
			// activated from old version
			if ( version_compare( $this->version, '2.0.0', '<' ) )
				set_transient( 'rl_activation_redirect', 1, 3600 );
		} else
			set_transient( 'rl_activation_redirect', 1, 3600 );

		// grant new capabilities
		$this->grant_capabilities();

		// add options if needed
		add_option( 'responsive_lightbox_settings', $this->defaults['settings'], '', false );
		add_option( 'responsive_lightbox_configuration', $this->defaults['configuration'], '', false );
		add_option( 'responsive_lightbox_folders', $this->defaults['folders'], '', false );
		add_option( 'responsive_lightbox_builder', $this->defaults['builder'], '', false );
		add_option( 'responsive_lightbox_capabilities', $this->defaults['capabilities'], '', false );
		add_option( 'responsive_lightbox_remote_library', $this->defaults['remote_library'], '', false );
		add_option( 'responsive_lightbox_version', $this->defaults['version'], '', false );

		$this->flush_rewrite_rules_after_gallery_registration();
	}

	/**
	 * Flush rewrite rules after registering gallery routes.
	 *
	 * The marker remains when an interrupted activation cannot complete the
	 * flush. A later normal request consumes it after init_galleries().
	 *
	 * @return void
	 */
	private function flush_rewrite_rules_after_gallery_registration() {
		update_option( self::REWRITE_FLUSH_PENDING, 1, false );

		if ( ! post_type_exists( 'rl_gallery' ) ) {
			$this->init_galleries();
		}

		flush_rewrite_rules();
		delete_option( self::REWRITE_FLUSH_PENDING );
	}

	/**
	 * Complete an activation rewrite flush interrupted before it could finish.
	 *
	 * @return void
	 */
	public function flush_deferred_rewrite_rules() {
		if ( ! get_option( self::REWRITE_FLUSH_PENDING, false ) )
			return;

		flush_rewrite_rules();
		delete_option( self::REWRITE_FLUSH_PENDING );
	}

	/**
	 * Plugin deactivation.
	 *
	 * @global object $wpdb
	 *
	 * @param bool $network
	 * @return void
	 */
	public function deactivation( $network ) {
		// network deactivation?
		if ( is_multisite() && $network ) {
			global $wpdb;

			// get all available sites
			$blogs_ids = $wpdb->get_col( 'SELECT blog_id FROM ' . $wpdb->blogs );

			foreach ( $blogs_ids as $blog_id ) {
				// change to another site
				switch_to_blog( (int) $blog_id );

				try {
					// run current site deactivation process
					$this->deactivate_site( true );
				} finally {
					restore_current_blog();
				}
			}
		} else
			$this->deactivate_site();
	}

	/**
	 * Single site deactivation.
	 *
	 * @global object $wp_roles
	 *
	 * @param bool $multi
	 * @return void
	 */
	public function deactivate_site( $multi = false ) {
		if ( $multi === true ) {
			$options = get_option( 'responsive_lightbox_settings' );
			$check = is_array( $options ) && ! empty( $options['deactivation_delete'] );
		} else
			$check = $this->options['settings']['deactivation_delete'];

		// delete options if needed
		if ( $check ) {
			global $wp_roles;
			$users = get_users( [
				'blog_id' => get_current_blog_id(),
				'capability' => 'edit_lightbox_settings',
			] );

			// remove all capabilities
			foreach ( $wp_roles->roles as $role_name => $label ) {
				$role = $wp_roles->get_role( $role_name );

				foreach ( $this->capabilities as $capability => $label ) {
					$role->remove_cap( $capability );
				}
			}

			// remove direct grants on this site without touching other user meta.
			foreach ( $users as $user )
				$user->remove_cap( 'edit_lightbox_settings' );

			foreach ( [
				'responsive_lightbox_settings',
				'responsive_lightbox_configuration',
				'responsive_lightbox_folders',
				'responsive_lightbox_builder',
				'responsive_lightbox_capabilities',
				'responsive_lightbox_remote_library',
				'responsive_lightbox_version',
				'responsive_lightbox_basicgrid_gallery',
				'responsive_lightbox_basicslider_gallery',
				'responsive_lightbox_basicmasonry_gallery',
				'responsive_lightbox_activation_date',
				self::REWRITE_FLUSH_PENDING,
			] as $option )
				delete_option( $option );
		}

		// permalinks
		flush_rewrite_rules();
	}

	/**
	 * Update plugin hook.
	 *
	 * @return void
	 */
	public function update_plugin( $upgrader_object, $options ) {
		// plugin update?
		if ( $options['action'] === 'update' && $options['type'] === 'plugin' && array_key_exists( 'plugins', $options ) && is_array( $options['plugins'] ) ) {
			// get current plugin name
			$current_plugin = plugin_basename( __FILE__ );

			// search for a plugin
			foreach ( $options['plugins'] as $plugin ) {
				// found?
				if ( $plugin === $current_plugin ) {
					// 2.3.1
					if ( version_compare( $this->version, '2.3.1', '<' ) ) {
						// grant new capabilities just before the version update
						$this->grant_capabilities();
					}
				}
			}
		}
	}

	/**
	 * Grant new capabilities to user roles.
	 *
	 * @return void
	 */
	public function grant_capabilities() {
		// no capabilities?
		if ( ! $this->options['capabilities']['active'] )
			return;

		global $wp_roles;

		$user = wp_get_current_user();

		// add new capabilities to roles
		foreach ( $wp_roles->roles as $role_name => $label ) {
			// get user role
			$role = $wp_roles->get_role( $role_name );

			// treat such role as administrator
			if ( $role->has_cap( 'install_plugins' ) ) {
				// add every capability
				foreach ( $this->capabilities as $capability => $label ) {
					$role->add_cap( $capability );
				}

				// force capability on the current user
				if ( is_a( $user, 'WP_User' ) && ! $user->has_cap( 'edit_lightbox_settings' ) )
					$user->add_cap( 'edit_lightbox_settings' );
			}

			// role exists?
			if ( array_key_exists( $role_name, $this->defaults['capabilities']['roles'] ) ) {
				// add new capabilities to the current roles nevertheless
				foreach ( $this->capabilities as $capability => $label ) {
					// capability exists?
					if ( in_array( $capability, $this->defaults['capabilities']['roles'][$role_name], true ) ) {
						$role->add_cap( $capability );

						// force capability on the current user
						if ( $capability === 'edit_lightbox_settings' && is_a( $user, 'WP_User' ) && ! $user->has_cap( 'edit_lightbox_settings' ) && in_array( $role_name, $user->roles, true ) )
							$user->add_cap( 'edit_lightbox_settings' );
					}
				}
			}
		}
	}

	/**
	 * Load textdomain.
	 *
	 * @return void
	 */
	public function load_textdomain() {
		// load textdomain
		load_plugin_textdomain( 'responsive-lightbox', false, dirname( RESPONSIVE_LIGHTBOX_BASENAME ) . '/languages' );

		// update gallery types translations
		$this->gallery_types = [
			'default'		=> __( 'Default', 'responsive-lightbox' ),
			'basicgrid'		=> __( 'Basic Grid', 'responsive-lightbox' ),
			'basicslider'	=> __( 'Basic Slider', 'responsive-lightbox' ),
			'basicmasonry'	=> __( 'Basic Masonry', 'responsive-lightbox' )
		];

		// update capabilities translations
		$this->capabilities = [
			'publish_galleries'				=> __( 'Publish Galleries', 'responsive-lightbox' ),
			'edit_galleries'				=> __( 'Edit Galleries', 'responsive-lightbox' ),
			'edit_published_galleries'		=> __( 'Edit Published Galleries', 'responsive-lightbox' ),
			'edit_others_galleries'			=> __( 'Edit Others Galleries', 'responsive-lightbox' ),
			'edit_private_galleries'		=> __( 'Edit Private Galleries', 'responsive-lightbox' ),
			'delete_galleries'				=> __( 'Delete Galleries', 'responsive-lightbox' ),
			'delete_published_galleries'	=> __( 'Delete Published Galleries', 'responsive-lightbox' ),
			'delete_others_galleries'		=> __( 'Delete Others Galleries', 'responsive-lightbox' ),
			'delete_private_galleries'		=> __( 'Delete Private Galleries', 'responsive-lightbox' ),
			'read_private_galleries'		=> __( 'Read Private Galleries', 'responsive-lightbox' ),
			'manage_gallery_categories'		=> __( 'Manage Gallery Categories', 'responsive-lightbox' ),
			'manage_gallery_tags'			=> __( 'Manage Gallery Tags', 'responsive-lightbox' ),
			'edit_lightbox_settings'		=> __( 'Manage Settings', 'responsive-lightbox' )
		];
	}

	/**
	 * Early plugin initialization.
	 *
	 * @return void
	 */
	public function plugins_loaded_init() {
		// set gallery types
		$this->gallery_types = [
			'default'		=> 'Default',
			'basicgrid'		=> 'Basic Grid',
			'basicslider'	=> 'Basic Slider',
			'basicmasonry'	=> 'Basic Masonry'
		];

		// only for backend
		if ( is_admin() ) {
			// get gallery types
			$gallery_types = apply_filters( 'rl_gallery_types', $this->gallery_types );

			$update_settings = false;

			// lightbox scipt does not exist?
			if ( ! array_key_exists( $this->options['settings']['script'], $this->options['configuration'] ) ) {
				// set default script
				$this->options['settings']['script'] = $this->defaults['settings']['script'];

				$update_settings = true;
			}

			// check default WordPress gallery
			if ( ! array_key_exists( $this->options['settings']['default_gallery'], $gallery_types ) ) {
				// set default gallery
				$this->options['settings']['default_gallery'] = $this->defaults['settings']['default_gallery'];

				$update_settings = true;
			}

			// check default builder gallery
			if ( ! array_key_exists( $this->options['settings']['builder_gallery'], $gallery_types ) ) {
				// set default gallery
				$this->options['settings']['builder_gallery'] = $this->defaults['settings']['builder_gallery'];

				$update_settings = true;
			}

			// check default WooCommerce gallery
			if ( ! array_key_exists( $this->options['settings']['default_woocommerce_gallery'], $gallery_types ) ) {
				// set default gallery
				$this->options['settings']['default_woocommerce_gallery'] = $this->defaults['settings']['default_woocommerce_gallery'];

				$update_settings = true;
			}

			// update settings
			if ( $update_settings )
				update_option( 'responsive_lightbox_settings', $this->options['settings'], false );

			// set capabilities with labels
			$this->capabilities = [
				'publish_galleries'				=> 'Publish Galleries',
				'edit_galleries'				=> 'Edit Galleries',
				'edit_published_galleries'		=> 'Edit Published Galleries',
				'edit_others_galleries'			=> 'Edit Others Galleries',
				'edit_private_galleries'		=> 'Edit Private Galleries',
				'delete_galleries'				=> 'Delete Galleries',
				'delete_published_galleries'	=> 'Delete Published Galleries',
				'delete_others_galleries'		=> 'Delete Others Galleries',
				'delete_private_galleries'		=> 'Delete Private Galleries',
				'read_private_galleries'		=> 'Read Private Galleries',
				'manage_gallery_categories'		=> 'Manage Gallery Categories',
				'manage_gallery_tags'			=> 'Manage Gallery Tags',
				'edit_lightbox_settings'		=> 'Manage Settings'
			];

			// 2.3.0 update
			if ( version_compare( $this->version, '2.3.0', '<' ) ) {
				// grant new capabilities just before the version update
				$this->grant_capabilities();
			}

			// plugin version update
			if ( version_compare( $this->version, $this->defaults['version'], '<' ) )
				update_option( 'responsive_lightbox_version', $this->defaults['version'], false );
		}

		include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes' . DIRECTORY_SEPARATOR . 'class-multilang.php' );
	}

	/**
	 * Update notice.
	 *
	 * @return void
	 */
	public function update_notice() {
		if ( ! current_user_can( 'install_plugins' ) )
			return;

		$current_update = 2;

		// get current time
		$current_time = time();

		if ( $this->options['settings']['update_version'] < $current_update ) {
			// check version, if update version is lower than plugin version, set update notice to true
			$this->options['settings'] = array_merge( $this->options['settings'], [ 'update_version' => $current_update, 'update_notice' => true ] );

			update_option( 'responsive_lightbox_settings', $this->options['settings'] );

			// set activation date
			$activation_date = get_option( 'responsive_lightbox_activation_date' );

			if ( $activation_date === false )
				update_option( 'responsive_lightbox_activation_date', $current_time );
		}

		// display current version notice
		if ( $this->options['settings']['update_notice'] === true ) {
			// include notice js, only if needed
			add_action( 'admin_print_scripts', [ $this, 'admin_inline_js' ], 999 );

			// get activation date
			$activation_date = get_option( 'responsive_lightbox_activation_date' );

			if ( (int) $this->options['settings']['update_delay_date'] === 0 ) {
				if ( $activation_date + 2 * WEEK_IN_SECONDS > $current_time )
					$this->options['settings']['update_delay_date'] = $activation_date + 2 * WEEK_IN_SECONDS;
				else
					$this->options['settings']['update_delay_date'] = $current_time;

				update_option( 'responsive_lightbox_settings', $this->options['settings'] );
			}

			if ( ( ! empty( $this->options['settings']['update_delay_date'] ) ? (int) $this->options['settings']['update_delay_date'] : $current_time ) <= $current_time )
				$this->add_notice( sprintf( __( "Hey, you've been using <strong>Responsive Lightbox & Gallery</strong> for more than %s", 'responsive-lightbox' ), human_time_diff( $activation_date, $current_time ) ) . '<br />' . esc_html__( 'Could you please do me a BIG favor and give it a 5-star rating on WordPress to help us spread the word and boost our motivation.', 'responsive-lightbox' ) . '<br /><br />' . esc_html__( 'Your help is much appreciated. Thank you very much', 'responsive-lightbox' ) . ' ~ <strong>Bartosz Arendt</strong>, ' . sprintf( __( 'founder of <a href="%s" target="_blank">dFactory</a> plugins.', 'responsive-lightbox' ), 'http://www.dfactory.co' ) . '<br /><br />' . sprintf( __( '<a href="%s" class="rl-dismissible-notice" target="_blank" rel="noopener">Ok, you deserve it</a><br /><a href="#" class="rl-dismissible-notice rl-delay-notice" rel="noopener">Nope, maybe later</a><br /><a href="#" class="rl-dismissible-notice" rel="noopener">I already did</a>', 'responsive-lightbox' ), 'https://wordpress.org/support/plugin/responsive-lightbox/reviews/?filter=5#new-post' ), 'notice notice-info is-dismissible rl-notice' );
		}
	}

	/**
	 * Dismiss notice.
	 *
	 * @return void
	 */
	public function dismiss_notice() {
		if ( ! current_user_can( 'install_plugins' ) )
			return;

		if ( isset( $_REQUEST['nonce'] ) && ctype_alnum( $_REQUEST['nonce'] ) && wp_verify_nonce( $_REQUEST['nonce'], 'rl_dismiss_notice' ) ) {
			$notice_action = isset( $_REQUEST['notice_action'] ) ? sanitize_key( $_REQUEST['notice_action'] ) : '';

			if ( empty( $notice_action ) || $notice_action === 'hide' )
				$notice_action = 'hide';

			switch ( $notice_action ) {
				// delay notice
				case 'delay':
					// set delay period to 1 week from now
					$this->options['settings'] = array_merge( $this->options['settings'], [ 'update_delay_date' => time() + 2 * WEEK_IN_SECONDS ] );
					update_option( 'responsive_lightbox_settings', $this->options['settings'] );
					break;

				// hide notice
				default:
					$this->options['settings'] = array_merge( $this->options['settings'], [ 'update_notice' => false ] );
					$this->options['settings'] = array_merge( $this->options['settings'], [ 'update_delay_date' => 0 ] );

					update_option( 'responsive_lightbox_settings', $this->options['settings'] );
			}
		}

		exit;
	}

	/**
	 * Add admin notices.
	 *
	 * @param string $html Notice HTML
	 * @param string $status Notice status
	 * @param bool $paragraph Whether to use paragraph
	 * @param bool $network
	 * @return void
	 */
	public function add_notice( $html = '', $status = 'error', $paragraph = true, $network = false ) {
		$this->notices[] = [
			'html' 		=> $html,
			'status'	=> $status,
			'paragraph'	=> $paragraph
		];

		add_action( 'admin_notices', [ $this, 'display_notice' ] );

		if ( $network )
			add_action( 'network_admin_notices', [ $this, 'display_notice' ] );
	}

	/**
	 * Print admin notices.
	 *
	 * @return void
	 */
	public function display_notice() {
		foreach( $this->notices as $notice ) {
			echo '
			<div class="' . esc_attr( $notice['status'] ) . '">
				' . ( $notice['paragraph'] ? '<p>' : '' ) . '
				' . wp_kses_post( $notice['html'] ) . '
				' . ( $notice['paragraph'] ? '</p>' : '' ) . '
			</div>';
		}
	}

	/**
	 * Print admin scripts.
	 *
	 * @return void
	 */
	public function admin_inline_js() {
		if ( ! current_user_can( 'install_plugins' ) )
			return;

		// register and enqueue styles
		wp_register_script( 'rl-notices', false );
		wp_enqueue_script( 'rl-notices' );

		// add styles
		wp_add_inline_script( 'rl-notices', "
			( function( $ ) {
				// ready event
				$( function() {
					// save dismiss state
					$( '.rl-notice.is-dismissible' ).on( 'click', '.notice-dismiss, .rl-dismissible-notice', function( e ) {
						if ( e.currentTarget.target !== '_blank' )
							e.preventDefault();

						var notice_action = 'hide';

						if ( e.currentTarget.classList.contains( 'rl-delay-notice' ) )
							notice_action = 'delay';

						$.post( ajaxurl, {
							action: 'rl_dismiss_notice',
							notice_action: notice_action,
							url: '" . esc_url_raw( admin_url( 'admin-ajax.php' ) ) . "',
							nonce: '" . esc_attr( wp_create_nonce( 'rl_dismiss_notice' ) ) . "'
						} );

						$( e.delegateTarget ).slideUp( 'fast' );
					} );
				} );
			} )( jQuery );
		", 'after' );
	}

	/**
	 * Add links to Support Forum.
	 *
	 * @param array $links
	 * @param string $file
	 * @return array
	 */
	public function plugin_extend_links( $links, $file ) {
		if ( ! current_user_can( 'install_plugins' ) )
			return $links;

		if ( $file === RESPONSIVE_LIGHTBOX_BASENAME )
			return array_merge( $links, [ sprintf( '<a href="http://www.dfactory.co/support/forum/responsive-lightbox/" target="_blank">%s</a>', esc_html__( 'Support', 'responsive-lightbox' ) ) ] );

		return $links;
	}

	/**
	 * Add links to Settings page.
	 *
	 * @param array $links
	 * @param string $file
	 * @return array
	 */
	public function plugin_settings_link( $links, $file ) {
		if ( ! is_admin() || ! current_user_can( apply_filters( 'rl_lightbox_settings_capability', 'manage_options' ) ) )
			return $links;

		if ( ! empty( $links['deactivate'] ) ) {
			// link already contains class attribute?
			if ( preg_match( '/<a.*?class=(\'|")(.*?)(\'|").*?>/is', $links['deactivate'], $result ) === 1 )
				$links['deactivate'] = preg_replace( '/(<a.*?class=(?:\'|").*?)((?:\'|").*?>)/s', '$1 rl-deactivate-plugin-modal$2', $links['deactivate'] );
			else
				$links['deactivate'] = preg_replace( '/(<a.*?)>/s', '$1 class="rl-deactivate-plugin-modal">', $links['deactivate'] );

			// link already contains href attribute?
			if ( preg_match( '/<a.*?href=(\'|")(.*?)(\'|").*?>/is', $links['deactivate'], $result ) === 1 ) {
				if ( ! empty( $result[2] ) )
					$this->deactivaion_url = $result[2];
			}
		}

		// put settings link at start
		array_unshift( $links, sprintf( '<a href="%s">%s</a>', esc_url_raw( admin_url( 'admin.php' ) ) . '?page=responsive-lightbox-settings', esc_html__( 'Settings', 'responsive-lightbox' ) ) );

		// add add-ons link
		$links[] = sprintf( '<a href="%s" style="color: #00a32a;">%s</a>', esc_url_raw( admin_url( 'admin.php' ) ) . '?page=responsive-lightbox-settings&tab=addons', esc_html__( 'Add-ons', 'responsive-lightbox' ) );

		return $links;
	}

	/**
	 * Deactivation modal HTML template.
	 *
	 * @return void
	 */
	public function modal_deactivation_template() {
		global $pagenow;

		// display only for plugins page
		if ( $pagenow !== 'plugins.php' )
			return;

		echo '
		<div id="rl-deactivation-modal" style="display: none;">
			<div id="rl-deactivation-container">
				<div id="rl-deactivation-body">
					<div class="rl-deactivation-options">
						<p><em>' . esc_html__( "We're sorry to see you go. Could you please tell us what happened?", 'responsive-lightbox' ) . '</em></p>
						<ul>';

			foreach ( [
				'1'	=> __( "I couldn't figure out how to make it work.", 'responsive-lightbox' ),
				'2'	=> __( 'I found another plugin to use for the same task.', 'responsive-lightbox' ),
				'3'	=> __( 'The User Interface is not clear to me.', 'responsive-lightbox' ),
				'4'	=> __( 'The plugin is not what I was looking for.', 'responsive-lightbox' ),
				'5'	=> __( "Support isn't timely.", 'responsive-lightbox' ),
				'6'	=> __( 'Other', 'responsive-lightbox' )
			] as $option => $text ) {
				echo '
							<li><label><input type="radio" name="rl_deactivation_option" value="' . (int) $option . '" ' . checked( '6', $option, false ) . ' />' . esc_html( $text ) . '</label></li>';
			}

			echo '
						</ul>
					</div>
					<div class="rl-deactivation-textarea">
						<textarea name="rl_deactivation_other"></textarea>
					</div>
				</div>
				<div id="rl-deactivation-footer">
					<a href="" class="button rl-deactivate-plugin-cancel">' . esc_html__( 'Cancel', 'responsive-lightbox' ) . '</a>
					<a href="' . esc_url( $this->deactivaion_url ) . '" class="button button-secondary rl-deactivate-plugin-simple">' . esc_html__( 'Deactivate', 'responsive-lightbox' ) . '</a>
					<a href="' . esc_url( $this->deactivaion_url ) . '" class="button button-primary right rl-deactivate-plugin-data">' . esc_html__( 'Deactivate & Submit', 'responsive-lightbox' ) . '</a>
					<span class="spinner"></span>
				</div>
			</div>
		</div>';
	}

	/**
	 * Send data about deactivation of the plugin.
	 *
	 * @return void
	 */
	public function deactivate_plugin() {
		// no nonce?
		if ( ! isset( $_POST['nonce'] ) )
			return;

		if ( ! ctype_alnum( $_POST['nonce'] ) )
			return;

		// check permissions
		if ( ! current_user_can( 'install_plugins' ) || wp_verify_nonce( $_POST['nonce'], 'rl-deactivate-plugin' ) === false )
			return;

		if ( isset( $_POST['option_id'] ) ) {
			$option_id = (int) $_POST['option_id'];
			$other = sanitize_text_field( $_POST['other'] );

			// avoid fake submissions
			if ( $option_id === 6 && $other === '' )
				wp_send_json_success();

			wp_remote_post(
				'https://www.dfactory.co/wp-json/api/v1/forms/',
				[
					'timeout'	=> 5,
					'blocking'	=> true,
					'headers'	=> [],
					'body'		=> [
						'id'		=> 13,
						'option'	=> $option_id,
						'other'		=> $other
					]
				]
			);

			wp_send_json_success();
		}

		wp_send_json_error();
	}

	/**
	 * Set current lightbox script.
	 *
	 * @return bool
	 */
	public function set_lightbox_script( $script ) {
		$script_options = [];
		if ( $this->settings && method_exists( $this->settings, 'get_setting_fields' ) ) {
			$settings_fields = $this->settings->get_setting_fields( 'settings' );
			if ( ! empty( $settings_fields['script']['options'] ) && is_array( $settings_fields['script']['options'] ) )
				$script_options = $settings_fields['script']['options'];
		}

		if ( empty( $script_options ) ) {
			$scripts = Responsive_Lightbox_Settings_Data::get_scripts();
			if ( is_array( $scripts ) )
				$script_options = array_combine( array_keys( $scripts ), array_keys( $scripts ) );
		}

		if ( is_array( $script_options ) && array_key_exists( $script, $script_options ) ) {
			// set new lightbox script
			$this->current_script = $script;

			return true;
		}

		return false;
	}

	/**
	 * Initialize remote libraries.
	 *
	 * @return void
	 */
	public function init_remote_libraries() {
		// include classes
		include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes/class-remote-library.php' );
		include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes/class-remote-library-api.php' );

		$this->remote_library = new Responsive_Lightbox_Remote_Library();

		// include providers
		include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes/providers/class-flickr.php' );
		include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes/providers/class-unsplash.php' );
		include_once( RESPONSIVE_LIGHTBOX_PATH . 'includes/providers/class-wikimedia.php' );
	}

	/**
	 * Initialize galleries.
	 *
	 * @return void
	 */
	public function init_galleries() {
		// initialize gallery class
		new Responsive_Lightbox_Galleries( ! $this->options['builder']['gallery_builder'] );

		// end if in read only mode
		if ( ! $this->options['builder']['gallery_builder'] )
			return;

		$taxonomies = [];

		if ( $this->options['builder']['categories'] ) {
			$taxonomies[] = 'rl_category';

			$data = [
				'public'				=> true,
				'hierarchical'			=> true,
				'labels'				=> [
					'name'				=> _x( 'Gallery Categories', 'taxonomy general name', 'responsive-lightbox' ),
					'singular_name'		=> _x( 'Gallery Category', 'taxonomy singular name', 'responsive-lightbox' ),
					'search_items'		=> __( 'Search Gallery Categories', 'responsive-lightbox' ),
					'all_items'			=> __( 'All Gallery Categories', 'responsive-lightbox' ),
					'parent_item'		=> __( 'Parent Gallery Category', 'responsive-lightbox' ),
					'parent_item_colon'	=> __( 'Parent Gallery Category:', 'responsive-lightbox' ),
					'edit_item'			=> __( 'Edit Gallery Category', 'responsive-lightbox' ),
					'view_item'			=> __( 'View Gallery Category', 'responsive-lightbox' ),
					'update_item'		=> __( 'Update Gallery Category', 'responsive-lightbox' ),
					'add_new_item'		=> __( 'Add New Gallery Category', 'responsive-lightbox' ),
					'new_item_name'		=> __( 'New Gallery Category Name', 'responsive-lightbox' ),
					'menu_name'			=> __( 'Categories', 'responsive-lightbox' )
				],
				'show_ui'				=> true,
				'show_admin_column'		=> true,
				'update_count_callback'	=> '_update_post_term_count',
				'query_var'				=> true,
				'rewrite'				=> [
					'slug'			=> $this->options['builder']['permalink_categories'],
					'with_front'	=> false,
					'hierarchical'	=> false
				]
			];

			if ( $this->options['capabilities']['active'] ) {
				$data['capabilities'] = [
					'manage_terms'	=> 'manage_gallery_categories',
					'edit_terms'	=> 'manage_gallery_categories',
					'delete_terms'	=> 'manage_gallery_categories',
					'assign_terms'	=> 'edit_galleries'
				];
			}

			register_taxonomy( 'rl_category', 'rl_gallery', $data );
		}

		if ( $this->options['builder']['tags'] ) {
			$taxonomies[] = 'rl_tag';

			$data = [
				'public'				=> true,
				'hierarchical'			=> false,
				'labels'				=> [
					'name'							=> _x( 'Gallery Tags', 'taxonomy general name', 'responsive-lightbox' ),
					'singular_name'					=> _x( 'Gallery Tag', 'taxonomy singular name', 'responsive-lightbox' ),
					'search_items'					=> __( 'Search Gallery Tags', 'responsive-lightbox' ),
					'popular_items'					=> __( 'Popular Gallery Tags', 'responsive-lightbox' ),
					'all_items'						=> __( 'All Gallery Tags', 'responsive-lightbox' ),
					'parent_item'					=> null,
					'parent_item_colon'				=> null,
					'edit_item'						=> __( 'Edit Gallery Tag', 'responsive-lightbox' ),
					'update_item'					=> __( 'Update Gallery Tag', 'responsive-lightbox' ),
					'add_new_item'					=> __( 'Add New Gallery Tag', 'responsive-lightbox' ),
					'new_item_name'					=> __( 'New Gallery Tag Name', 'responsive-lightbox' ),
					'separate_items_with_commas'	=> __( 'Separate gallery tags with commas', 'responsive-lightbox' ),
					'add_or_remove_items'			=> __( 'Add or remove gallery tags', 'responsive-lightbox' ),
					'choose_from_most_used'			=> __( 'Choose from the most used gallery tags', 'responsive-lightbox' ),
					'menu_name'						=> __( 'Tags', 'responsive-lightbox' )
				],
				'show_ui'				=> true,
				'show_admin_column'		=> true,
				'update_count_callback'	=> '_update_post_term_count',
				'query_var'				=> true,
				'rewrite'				=> [
					'slug'			=> $this->options['builder']['permalink_tags'],
					'with_front'	=> false,
					'hierarchical'	=> false
				]
			];

			if ( $this->options['capabilities']['active'] ) {
				$data['capabilities'] = [
					'manage_terms'	=> 'manage_gallery_tags',
					'edit_terms'	=> 'manage_gallery_tags',
					'delete_terms'	=> 'manage_gallery_tags',
					'assign_terms'	=> 'edit_galleries'
				];
			}

			register_taxonomy( 'rl_tag', 'rl_gallery', $data );
		}

		$data = [
			'labels'				=> [
				'name'					=> _x( 'Galleries', 'post type general name', 'responsive-lightbox' ),
				'singular_name'			=> _x( 'Gallery', 'post type singular name', 'responsive-lightbox' ),
				'add_new'				=> __( 'Add New', 'responsive-lightbox' ),
				'add_new_item'			=> __( 'Add New Gallery', 'responsive-lightbox' ),
				'edit_item'				=> __( 'Edit Gallery', 'responsive-lightbox' ),
				'new_item'				=> __( 'New Gallery', 'responsive-lightbox' ),
				'view_item'				=> __( 'View Gallery', 'responsive-lightbox' ),
				'view_items'			=> __( 'View Galleries', 'responsive-lightbox' ),
				'search_items'			=> __( 'Search Galleries', 'responsive-lightbox' ),
				'not_found'				=> __( 'No galleries found', 'responsive-lightbox' ),
				'not_found_in_trash'	=> __( 'No galleries found in trash', 'responsive-lightbox' ),
				'all_items'				=> __( 'All Galleries', 'responsive-lightbox' ),
				'menu_name'				=> __( 'Gallery', 'responsive-lightbox' )
			],
			'description'			=> '',
			'public'				=> true,
			'exclude_from_search'	=> false,
			'publicly_queryable'	=> true,
			'show_ui'				=> true,
			'show_in_menu'			=> true,
			'show_in_admin_bar'		=> true,
			'show_in_nav_menus'		=> true,
			'menu_position'			=> 57,
			'menu_icon'				=> 'dashicons-format-gallery',
			'map_meta_cap'			=> true,
			'hierarchical'			=> false,
			'supports'				=> [ 'title', 'author', 'thumbnail' ],
			'has_archive'			=> $this->options['builder']['archives'],
			'query_var'				=> true,
			'can_export'			=> true,
			'taxonomies'			=> $taxonomies,
			'rewrite'				=> [
				'slug'			=> $this->options['builder']['permalink'],
				'with_front'	=> false,
				'feed'			=> true,
				'pages'			=> true
			]
		];

		if ( $this->options['capabilities']['active'] ) {
			$data['capability_type'] = [ 'gallery', 'galleries' ];
			$data['capabilities'] = [
				'publish_posts'				=> 'publish_galleries',
				'edit_posts'				=> 'edit_galleries',
				'edit_published_posts'		=> 'edit_published_galleries',
				'edit_others_posts'			=> 'edit_others_galleries',
				'edit_private_posts'		=> 'edit_private_galleries',
				'delete_posts'				=> 'delete_galleries',
				'delete_published_posts'	=> 'delete_published_galleries',
				'delete_others_posts'		=> 'delete_others_galleries',
				'delete_private_posts'		=> 'delete_private_galleries',
				'read_private_posts'		=> 'read_private_galleries',
				'edit_post'					=> 'edit_gallery',
				'delete_post'				=> 'delete_gallery',
				'read_post'					=> 'read_gallery'
			];
		}

		// register rl_gallery
		register_post_type( 'rl_gallery', $data );

		if ( $this->options['builder']['archives'] && $this->options['builder']['archives_category'] !== 'all' && ! is_admin() )
			add_action( 'pre_get_posts', [ $this, 'gallery_archives' ] );

		add_filter( 'post_updated_messages', [ $this, 'post_updated_messages' ] );
	}

	/**
	 * Create breadcrumbs.
	 *
	 * @return void
	 */
	public function display_breadcrumbs() {
		global $pagenow, $typenow;

		$breadcrumbs = [];

		// get page
		$page_raw = isset( $_GET['page'] ) ? sanitize_text_field( wp_unslash( $_GET['page'] ) ) : '';
		$page_parts = $page_raw !== '' ? explode( '&', $page_raw, 2 ) : [ '' ];
		$page = $page_parts[0] !== '' ? sanitize_key( $page_parts[0] ) : '';
		$page_args = [];

		if ( ! empty( $page_parts[1] ) )
			parse_str( $page_parts[1], $page_args );

		// sanitize all page_args to prevent XSS
		$page_args = array_map( 'sanitize_text_field', $page_args );

		// get tabs from Settings API
		$api_pages = $this->settings_api->get_pages();
		$tabs = [];
		
		if ( isset( $api_pages['settings'], $api_pages['settings']['tabs'] ) ) {
			foreach ( $api_pages['settings']['tabs'] as $tab_id => $tab_data ) {
				$tabs[$tab_id] = [
					'name' => isset( $tab_data['label'] ) ? $tab_data['label'] : ucfirst( str_replace( '_', ' ', $tab_id ) ),
					'default_section' => isset( $tab_data['default_subpage'] ) ? $tab_data['default_subpage'] : '',
					'sections' => []
				];
				
				// populate subpages as sections for gallery tab
				if ( $tab_id === 'gallery' && isset( $tab_data['subpages'] ) ) {
					foreach ( $tab_data['subpages'] as $subpage_id => $subpage_data ) {
						$tabs[$tab_id]['sections'][$subpage_id] = isset( $subpage_data['label'] ) ? $subpage_data['label'] : ucfirst( str_replace( '_', ' ', $subpage_id ) );
					}
				}
			}
		}

		$tab_key = '';
		$section_key = '';

		// settings (new routing)
		if ( $page === 'responsive-lightbox-settings' ) {
			$tab_key = isset( $_GET['tab'] ) ? sanitize_key( $_GET['tab'] ) : ( isset( $page_args['tab'] ) ? sanitize_key( $page_args['tab'] ) : 'settings' );

			if ( ! array_key_exists( $tab_key, $tabs ) )
				$tab_key = 'settings';
		// settings (legacy routing)
		} elseif ( $page && preg_match( '/^responsive-lightbox-(' . implode( '|', array_keys( $tabs ) ) . ')$/', $page, $found_tabs ) === 1 ) {
			$tab_key = isset( $found_tabs[1] ) ? $found_tabs[1] : 'settings';
		}

		if ( $tab_key ) {
			$section_key = isset( $_GET['section'] ) ? sanitize_key( $_GET['section'] ) : ( isset( $page_args['section'] ) ? sanitize_key( $page_args['section'] ) : ( ! empty( $tabs[$tab_key]['default_section'] ) ? $tabs[$tab_key]['default_section'] : '' ) );

			$breadcrumbs[] = [
				'url'	=> admin_url( 'admin.php?page=responsive-lightbox-settings' ),
				'name'	=> __( 'Settings', 'responsive-lightbox' )
			];

			if ( $tab_key === 'configuration' ) {
				$breadcrumbs[] = [
					'url'	=> admin_url( 'admin.php?page=responsive-lightbox-settings&tab=configuration' ),
					'name'	=> $tabs[$tab_key]['name']
				];

				// get scripts from helper
				$scripts = Responsive_Lightbox_Settings_Data::get_scripts();

				// valid lightbox script?
				if ( array_key_exists( $section_key, $scripts ) ) {
					$breadcrumbs[] = [
						'url'	=> '',
						'name'	=> $scripts[$section_key]['name']
					];
				}
			} elseif ( $tab_key === 'gallery' ) {
				$breadcrumbs[] = [
					'url'	=> admin_url( 'admin.php?page=responsive-lightbox-settings&tab=gallery' ),
					'name'	=> $tabs[$tab_key]['name']
				];

				// valid gallery?
				if ( array_key_exists( $section_key, $tabs['gallery']['sections'] ) ) {
					$section_label = $tabs['gallery']['sections'][$section_key];
					$default_suffix = ' ' . __( '(default)', 'responsive-lightbox' );
					if ( substr( $section_label, -strlen( $default_suffix ) ) === $default_suffix )
						$section_label = substr( $section_label, 0, -strlen( $default_suffix ) );

					$breadcrumbs[] = [
						'url'	=> '',
						'name'	=> $section_label
					];
				}
			} else {
				$breadcrumbs[] = [
					'url'	=> '',
					'name'	=> $tabs[$tab_key]['name']
				];
			}
		// gallery listing
		} elseif ( $pagenow === 'edit.php' && $typenow === 'rl_gallery' ) {
			$breadcrumbs[] = [
				'url'	=> '',
				'name'	=> __( 'Galleries', 'responsive-lightbox' )
			];
		// single gallery
		} elseif ( $pagenow === 'post.php' && get_post_type() === 'rl_gallery' ) {
			$breadcrumbs[] = [
				'url'	=> admin_url( 'edit.php?post_type=rl_gallery' ),
				'name'	=> __( 'Galleries', 'responsive-lightbox' )
			];

			$breadcrumbs[] = [
				'url'	=> '',
				'name'	=> __( 'Edit gallery', 'responsive-lightbox' )
			];
		// new gallery
		} elseif ( $pagenow === 'post-new.php' && get_post_type() === 'rl_gallery' ) {
			$breadcrumbs[] = [
				'url'	=> admin_url( 'edit.php?post_type=rl_gallery' ),
				'name'	=> __( 'Galleries', 'responsive-lightbox' )
			];

			$breadcrumbs[] = [
				'url'	=> '',
				'name'	=> __( 'New gallery', 'responsive-lightbox' )
			];
		// gallery taxonomies
		} elseif ( in_array( $pagenow, [ 'edit-tags.php', 'term.php' ], true ) && isset( $_GET['taxonomy'], $_GET['post_type'] ) ) {
			$post_type = sanitize_key( $_GET['post_type'] );
			$taxonomy = sanitize_key( $_GET['taxonomy'] );

			if ( $post_type === 'rl_gallery' ) {
				$breadcrumbs[] = [
					'url'	=> admin_url( 'edit.php?post_type=rl_gallery' ),
					'name'	=> __( 'Galleries', 'responsive-lightbox' )
				];

				// categories
				if ( $taxonomy === 'rl_category' ) {
					// new category
					if ( $pagenow === 'term.php' ) {
						$breadcrumbs[] = [
							'url'	=> admin_url( 'edit-tags.php?taxonomy=rl_category&post_type=rl_gallery' ),
							'name'	=> __( 'Categories', 'responsive-lightbox' )
						];

						$breadcrumbs[] = [
							'url'	=> '',
							'name'	=> __( 'Edit category', 'responsive-lightbox' )
						];
					// categories listing
					} else {
						$breadcrumbs[] = [
							'url'	=> '',
							'name'	=> __( 'Categories', 'responsive-lightbox' )
						];
					}
				// tags
				} elseif ( $taxonomy === 'rl_tag' ) {
					// new tag
					if ( $pagenow === 'term.php' ) {
						$breadcrumbs[] = [
							'url'	=> admin_url( 'edit-tags.php?taxonomy=rl_category&post_type=rl_gallery' ),
							'name'	=> __( 'Tags', 'responsive-lightbox' )
						];

						$breadcrumbs[] = [
							'url'	=> '',
							'name'	=> __( 'Edit tag', 'responsive-lightbox' )
						];
					// tags listing
					} else {
						$breadcrumbs[] = [
							'url'	=> '',
							'name'	=> __( 'Tags', 'responsive-lightbox' )
						];
					}
				}
			}
		}

		// any breadcrumbs?
		if ( ! empty( $breadcrumbs ) ) {
			array_unshift( $breadcrumbs,
				[
					'url'	=> '',
					'name'	=> __( 'Responsive Lightbox & Gallery', 'responsive-lightbox' )
				]
			);

			$html = [];

			foreach ( $breadcrumbs as $breadcrumb ) {
				if ( ! empty( $breadcrumb['url'] ) )
					$html[] = '<a href="' . esc_url( $breadcrumb['url'] ) . '">' . esc_html( $breadcrumb['name'] ) . '</a>';
				else
					$html[] = '<span>' . esc_html( $breadcrumb['name'] ) . '</span>';
			}

			echo '
			<div class="responsive-lightbox-breadcrumbs-container">
				<div class="responsive-lightbox-breadcrumbs">
					<p>' . implode( ' / ', $html ) . '</p>
				</div>
			</div>';
		}
	}

	/**
	 * Gallery update messages.
	 *
	 * @param array $messages
	 * @return void
	 */
	public function gallery_archives( $query ) {
		if ( is_post_type_archive( 'rl_gallery' ) ) {
			$query->set(
				'tax_query',
				[
					'relation' => 'OR',
					[
						'taxonomy'	=> 'rl_category',
						'field'		=> 'slug',
						'terms'		=> $this->options['builder']['archives_category']
					]
				]
			);
		}
	}

	/**
	 * Gallery update messages.
	 *
	 * @param array $messages
	 * @return array
	 */
	public function post_updated_messages( $messages ) {
		$post = get_post();
		$post_type = get_post_type( $post );
		$post_type_object = get_post_type_object( $post_type );

		$messages['rl_gallery'] = [
			1	 => __( 'Gallery updated.', 'responsive-lightbox' ),
			4	 => __( 'Gallery updated.', 'responsive-lightbox' ),
			5	 => isset( $_GET['revision'] ) ? sprintf( __( 'Gallery restored to revision from %s', 'responsive-lightbox' ), wp_post_revision_title( (int) $_GET['revision'], false ) ) : false,
			6	 => __( 'Gallery published.', 'responsive-lightbox' ),
			7	 => __( 'Gallery saved.', 'responsive-lightbox' ),
			8	 => __( 'Gallery submitted.', 'responsive-lightbox' ),
			9	 => sprintf( __( 'Gallery scheduled for: <strong>%1$s</strong>.', 'responsive-lightbox' ), date_i18n( __( 'M j, Y @ G:i', 'responsive-lightbox' ), strtotime( $post->post_date ) ) ),
			10	 => __( 'Gallery draft updated.', 'responsive-lightbox' )
		];

		if ( $post_type_object->publicly_queryable && 'rl_gallery' === $post_type ) {
			$permalink = get_permalink( $post->ID );

			$view_link = sprintf( ' <a href="%s">%s</a>', esc_url( $permalink ), __( 'View gallery', 'responsive-lightbox' ) );
			$messages[$post_type][1] .= $view_link;
			$messages[$post_type][6] .= $view_link;
			$messages[$post_type][9] .= $view_link;

			$preview_permalink = add_query_arg( 'preview', 'true', $permalink );
			$preview_link = sprintf( ' <a target="_blank" href="%s">%s</a>', esc_url( $preview_permalink ), __( 'Preview gallery', 'responsive-lightbox' ) );
			$messages[$post_type][8] .= $preview_link;
			$messages[$post_type][10] .= $preview_link;
		}

		return $messages;
	}

	/**
	 * Enqueue admin scripts and styles.
	 *
	 * @param string $page
	 * @return void
	 */
	public function admin_scripts_styles( $page ) {
		global $typenow;

		// highlight Add-ons menu item in admin menu
		wp_register_style( 'responsive-lightbox-admin-menu', false );
		wp_enqueue_style( 'responsive-lightbox-admin-menu' );
		wp_add_inline_style( 'responsive-lightbox-admin-menu', '
			#adminmenu .toplevel_page_responsive-lightbox-settings .wp-submenu a[href*="tab=addons"] {
				color: #00a32a;
			}
			#adminmenu .toplevel_page_responsive-lightbox-settings .wp-submenu a[href*="tab=addons"]:hover,
			#adminmenu .toplevel_page_responsive-lightbox-settings .wp-submenu li.current a[href*="tab=addons"] {
				color: #00a32a;
			}
		' );

		$page_raw = isset( $_GET['page'] ) ? wp_unslash( $_GET['page'] ) : '';
		$page_parts = $page_raw !== '' ? explode( '&', $page_raw, 2 ) : [ '' ];
		$page_slug = $page_parts[0] !== '' ? sanitize_key( $page_parts[0] ) : '';

		// settings pages?
		if ( $page_slug === 'responsive-lightbox-settings' ) {
			wp_enqueue_script( 'responsive-lightbox-admin-theme', RESPONSIVE_LIGHTBOX_URL . '/js/admin-theme.js', [], $this->defaults['version'] );
			wp_enqueue_script( 'responsive-lightbox-admin-settings', RESPONSIVE_LIGHTBOX_URL . '/js/admin-settings.js', [ 'jquery' ], $this->defaults['version'] );

			// prepare script data
			$script_data = [
				'resetSettingsToDefaults'	=> esc_html__( 'Are you sure you want to reset these settings to defaults?', 'responsive-lightbox' ),
				'taxNonce'					=> wp_create_nonce( 'rl-folders-ajax-taxonomies-nonce' ),
				'errorProcessingTaxonomies'	=> esc_html__( 'An error occurred while processing taxonomies.', 'responsive-lightbox' ),
				'errorLoadingTaxonomies'	=> esc_html__( 'An error occurred while loading taxonomies.', 'responsive-lightbox' )
			];

			wp_add_inline_script( 'responsive-lightbox-admin-settings', 'var rlArgsAdmin = ' . wp_json_encode( $script_data ) . ";\n", 'before' );

			wp_enqueue_style( 'responsive-lightbox-admin', RESPONSIVE_LIGHTBOX_URL . '/css/admin.css', [], $this->defaults['version'] );
			wp_enqueue_style( 'responsive-lightbox-admin-settings', RESPONSIVE_LIGHTBOX_URL . '/css/admin-settings.css', [ 'responsive-lightbox-admin' ], $this->defaults['version'] );
		// gallery editor screens
		} elseif ( in_array( $page, [ 'post.php', 'post-new.php' ], true ) && get_post_type() === 'rl_gallery' ) {
			wp_enqueue_media();

			wp_enqueue_script( 'responsive-lightbox-admin-select2', RESPONSIVE_LIGHTBOX_URL . '/assets/select2/select2.full' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', [ 'jquery' ], '4.1.0' );
			wp_enqueue_script( 'responsive-lightbox-admin-theme', RESPONSIVE_LIGHTBOX_URL . '/js/admin-theme.js', [], $this->defaults['version'] );
			wp_enqueue_script( 'responsive-lightbox-admin-galleries', RESPONSIVE_LIGHTBOX_URL . '/js/admin-galleries.js', [ 'jquery', 'underscore', 'jquery-ui-sortable' ], $this->defaults['version'] );

			// get fields
			$fields = $this->galleries->get_data( 'fields' );

			// prepare script data
			$script_data = [
				'mediaItemTemplate'		=> $this->galleries->get_media_item_template( $fields['images']['media']['attachments']['preview'] ),
				'mediaEmbedTemplate'	=> $this->galleries->get_media_embed_template( true ),
				'mediaExcludeTemplate'	=> $this->galleries->get_media_exclude_input_template(),
				'textSelectImages'		=> esc_html__( 'Select gallery items', 'responsive-lightbox' ),
				'textUseImages'			=> esc_html__( 'Use these items', 'responsive-lightbox' ),
				'clearSelection'		=> esc_html__( 'Clear selected items', 'responsive-lightbox' ),
				'selectedImages'		=> esc_html__( 'Selected gallery items', 'responsive-lightbox' ),
				'editAttachment'		=> esc_html__( 'Edit attachment', 'responsive-lightbox' ),
				'editEmbed'				=> esc_html__( 'Edit embed video', 'responsive-lightbox' ),
				'videoDetails'			=> esc_html__( 'Video details', 'responsive-lightbox' ),
				'saveChanges'			=> esc_html__( 'Save changes', 'responsive-lightbox' ),
				'embedVideo'			=> esc_html__( 'Embed Video', 'responsive-lightbox' ),
				'onlyEmbedProviders'	=> esc_html__( 'Videos can be embedded only from the following providers: %s.', 'responsive-lightbox' ),
				'nonce'					=> wp_create_nonce( 'rl-gallery' ),
				'postId'				=> get_the_ID(),
				'thumbnail'				=> wp_get_attachment_image_src( $this->galleries->maybe_generate_thumbnail(), 'thumbnail', false ),
				'videoIcon'				=> RESPONSIVE_LIGHTBOX_URL . '/images/responsive-lightbox-video-thumbnail.png',
				'supports'				=> [
					'default'	=> rl_current_lightbox_supports( 'video' ) ? [ 'image', 'video' ] : 'image',
					'youtube'	=> rl_current_lightbox_supports( 'youtube' ),
					'vimeo'		=> rl_current_lightbox_supports( 'vimeo' )
				]
			];

			wp_add_inline_script( 'responsive-lightbox-admin-galleries', 'var rlArgsGalleries = ' . wp_json_encode( $script_data ) . ";\n", 'before' );

			wp_enqueue_style( 'responsive-lightbox-admin', RESPONSIVE_LIGHTBOX_URL . '/css/admin.css', [], $this->defaults['version'] );
			wp_enqueue_style( 'responsive-lightbox-admin-select2', RESPONSIVE_LIGHTBOX_URL . '/assets/select2/select2' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.css', [], '4.1.0' );
			wp_enqueue_style( 'responsive-lightbox-admin-galleries', RESPONSIVE_LIGHTBOX_URL . '/css/admin-galleries.css', [], $this->defaults['version'] );
		// gallery list screen
		} elseif ( $page === 'edit.php' && $typenow === 'rl_gallery' ) {
			wp_enqueue_style( 'responsive-lightbox-admin', RESPONSIVE_LIGHTBOX_URL . '/css/admin.css', [], $this->defaults['version'] );

			// Keep thumbnail column layout without loading full gallery editor styles on list table screens.
			wp_register_style( 'responsive-lightbox-admin-galleries-list', false );
			wp_enqueue_style( 'responsive-lightbox-admin-galleries-list' );
			wp_add_inline_style(
				'responsive-lightbox-admin-galleries-list',
				'.wp-list-table .column-image { width: 80px; }' .
				'.wp-list-table .column-image .media-icon { position: relative; overflow: hidden; text-align: center; height: 62px; }' .
				'.wp-list-table .column-image img { position: absolute; left: 50%; top: 50%; height: 100%; width: auto; transform: translate(-50%, -50%); }' .
				'.wp-list-table .column-image img.format-portrait { width: 100%; height: auto; }' .
				'.wp-list-table .column-image span { display: block; }'
			);
		// plugins?
		} elseif ( $page === 'plugins.php' ) {
			add_thickbox();

			wp_enqueue_script( 'responsive-lightbox-admin-plugins', RESPONSIVE_LIGHTBOX_URL . '/js/admin-plugins.js', [ 'jquery' ], $this->defaults['version'] );
			wp_enqueue_style( 'responsive-lightbox-admin-plugins', RESPONSIVE_LIGHTBOX_URL . '/css/admin-plugins.css', [], $this->defaults['version'] );

			// prepare script data
			$script_data = [
				'deactivate'	=> esc_html__( 'Responsive Lightbox & Gallery - Deactivation survey', 'responsive-lightbox' ),
				'nonce'			=> wp_create_nonce( 'rl-deactivate-plugin' )
			];

			wp_add_inline_script( 'responsive-lightbox-admin-plugins', 'var rlArgsPlugins = ' . wp_json_encode( $script_data ) . ";\n", 'before' );
		// taxonomies?
		} elseif ( in_array( $page, [ 'edit-tags.php', 'term.php' ], true ) && isset( $_GET['taxonomy'], $_GET['post_type'] ) ) {
			$post_type = sanitize_key( $_GET['post_type'] );

			if ( $post_type === 'rl_gallery' )
				wp_enqueue_style( 'responsive-lightbox-admin', RESPONSIVE_LIGHTBOX_URL . '/css/admin.css', [], $this->defaults['version'] );
		}
	}

	/**
	 * Init Gutenberg.
	 *
	 * @return void
	 */
	public function init_gutenberg() {
		// actions
		$this->register_gutenberg_blocks();
		add_action( 'enqueue_block_editor_assets', [ $this, 'gutenberg_enqueue_scripts' ] );

		// filters
		add_filter( 'block_categories_all', [ $this, 'block_category' ] );
	}

	/**
	 * Create block category.
	 *
	 * @return array
	 */
	function block_category( $categories ) {
		return array_merge(
			$categories,
			[
				[
					'slug' => 'responsive-lightbox',
					'title' => 'Responsive Lightbox'
				]
			]
		);
	}

	/**
	 * Register block metadata and editor assets.
	 *
	 * @return void
	 */
	public function register_gutenberg_blocks() {
		$dependencies = [ 'wp-blocks', 'wp-i18n', 'wp-element', 'wp-components', 'wp-data', 'wp-block-editor' ];

		wp_register_script( 'responsive-lightbox-block-editor-script', RESPONSIVE_LIGHTBOX_URL . '/js/gutenberg.js', $dependencies, $this->defaults['version'], true );
		wp_register_style( 'responsive-lightbox-block-editor-styles', RESPONSIVE_LIGHTBOX_URL . '/css/gutenberg.css', [], $this->defaults['version'] );

		register_block_type( RESPONSIVE_LIGHTBOX_PATH . 'blocks/gallery' );
		register_block_type( RESPONSIVE_LIGHTBOX_PATH . 'blocks/remote-library-image' );
	}

	/**
	 * Enqueue editor-only gallery modal assets.
	 *
	 * @return void
	 */
	public function gutenberg_enqueue_scripts() {
		global $pagenow;

		// prepare script data
		$script_data = [
			'active' => true
		];

		wp_add_inline_script( 'responsive-lightbox-block-editor-script', 'var rlBlockEditor = ' . wp_json_encode( $script_data ) . ";\n", 'before' );

		// enqueue gallery
		$this->galleries->enqueue_gallery_scripts_styles();
	}

	/**
	 * Enqueue admin widget scripts.
	 *
	 * @return void
	 */
	public function sidebar_admin_setup() {
		wp_enqueue_media();

		wp_enqueue_script( 'responsive-lightbox-admin-widgets', RESPONSIVE_LIGHTBOX_URL . '/js/admin-widgets.js', [ 'jquery', 'underscore' ], $this->defaults['version'] );

		// prepare script data
		$script_data = [
			'textRemoveImage'	=> esc_html__( 'Remove image', 'responsive-lightbox' ),
			'textSelectImages'	=> esc_html__( 'Select images', 'responsive-lightbox' ),
			'textSelectImage'	=> esc_html__( 'Select image', 'responsive-lightbox' ),
			'textUseImages'		=> esc_html__( 'Use these images', 'responsive-lightbox' ),
			'textUseImage'		=> esc_html__( 'Use this image', 'responsive-lightbox' )
		];

		wp_add_inline_script( 'responsive-lightbox-admin-widgets', 'var rlArgsWidgets = ' . wp_json_encode( $script_data ) . ";\n", 'before' );

		wp_register_style( 'responsive-lightbox-admin', RESPONSIVE_LIGHTBOX_URL . '/css/admin.css', [], $this->defaults['version'] );
		wp_enqueue_style( 'responsive-lightbox-admin-galleries', RESPONSIVE_LIGHTBOX_URL . '/css/admin-galleries.css', [], $this->defaults['version'] );
		wp_enqueue_style( 'responsive-lightbox-admin' );
	}

	/**
	 * Enqueue frontend scripts and styles.
	 *
	 * @return void
	 */
	public function front_scripts_styles() {
		$args = apply_filters(
			'rl_lightbox_args',
			[
				'script'			=> $this->current_script,
				'selector'			=> $this->options['settings']['selector'],
				'customEvents'		=> ( $this->options['settings']['enable_custom_events'] === true ? $this->options['settings']['custom_events'] : '' ),
				'activeGalleries'	=> $this->options['settings']['galleries']
			]
		);

		if ( $this->current_script !== $args['script'] )
			$this->set_lightbox_script( $args['script'] );

		$scripts = [];
		$styles = [];

		switch ( $args['script'] ) {
			case 'prettyphoto':
				wp_register_script( 'responsive-lightbox-prettyphoto', plugins_url( 'assets/prettyphoto/jquery.prettyPhoto' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', __FILE__ ), [ 'jquery' ], '3.1.6', $this->options['settings']['loading_place'] === 'footer' );
				wp_register_style( 'responsive-lightbox-prettyphoto', plugins_url( 'assets/prettyphoto/prettyPhoto' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.css', __FILE__ ), [], '3.1.6' );

				$scripts[] = 'responsive-lightbox-prettyphoto';
				$styles[] = 'responsive-lightbox-prettyphoto';

				$args = array_merge(
					$args,
					[
						'animationSpeed'	 => $this->options['configuration']['prettyphoto']['animation_speed'],
						'slideshow'			 => $this->options['configuration']['prettyphoto']['slideshow'],
						'slideshowDelay'	 => $this->options['configuration']['prettyphoto']['slideshow_delay'],
						'slideshowAutoplay'	 => $this->options['configuration']['prettyphoto']['slideshow_autoplay'],
						'opacity'			 => sprintf( '%.2f', $this->options['configuration']['prettyphoto']['opacity'] / 100 ),
						'showTitle'			 => $this->options['configuration']['prettyphoto']['show_title'],
						'allowResize'		 => $this->options['configuration']['prettyphoto']['allow_resize'],
						'allowExpand'		 => $this->options['configuration']['prettyphoto']['allow_expand'],
						'width'				 => $this->options['configuration']['prettyphoto']['width'],
						'height'			 => $this->options['configuration']['prettyphoto']['height'],
						'separator'			 => $this->options['configuration']['prettyphoto']['separator'],
						'theme'				 => $this->options['configuration']['prettyphoto']['theme'],
						'horizontalPadding'	 => $this->options['configuration']['prettyphoto']['horizontal_padding'],
						'hideFlash'			 => $this->options['configuration']['prettyphoto']['hide_flash'],
						'wmode'				 => $this->options['configuration']['prettyphoto']['wmode'],
						'videoAutoplay'		 => $this->options['configuration']['prettyphoto']['video_autoplay'],
						'modal'				 => $this->options['configuration']['prettyphoto']['modal'],
						'deeplinking'		 => $this->options['configuration']['prettyphoto']['deeplinking'],
						'overlayGallery'	 => $this->options['configuration']['prettyphoto']['overlay_gallery'],
						'keyboardShortcuts'	 => $this->options['configuration']['prettyphoto']['keyboard_shortcuts'],
						'social'			 => $this->options['configuration']['prettyphoto']['social']
					]
				);
				break;

			case 'swipebox':
				wp_register_script( 'responsive-lightbox-swipebox', plugins_url( 'assets/swipebox/jquery.swipebox' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', __FILE__ ), [ 'jquery', 'responsive-lightbox-sanitizer' ], '1.5.2', $this->options['settings']['loading_place'] === 'footer' );
				wp_register_style( 'responsive-lightbox-swipebox', plugins_url( 'assets/swipebox/swipebox' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.css', __FILE__ ), [], '1.5.2' );

				$scripts[] = 'responsive-lightbox-swipebox';
				$styles[] = 'responsive-lightbox-swipebox';

				$args = array_merge(
					$args,
					[
						'animation'					=> $this->options['configuration']['swipebox']['animation'] === 'css',
						'hideCloseButtonOnMobile'	=> $this->options['configuration']['swipebox']['hide_close_mobile'],
						'removeBarsOnMobile'		=> $this->options['configuration']['swipebox']['remove_bars_mobile'],
						'hideBars'					=> $this->options['configuration']['swipebox']['hide_bars'],
						'hideBarsDelay'				=> $this->options['configuration']['swipebox']['hide_bars_delay'],
						'videoMaxWidth'				=> $this->options['configuration']['swipebox']['video_max_width'],
						'useSVG'					=> ! $this->options['configuration']['swipebox']['force_png_icons'],
						'loopAtEnd'					=> $this->options['configuration']['swipebox']['loop_at_end']
					]
				);
				break;

			case 'nivo':
				wp_register_script( 'responsive-lightbox-nivo', plugins_url( 'assets/nivo/nivo-lightbox' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', __FILE__ ), [ 'jquery', 'responsive-lightbox-sanitizer' ], '1.3.1', $this->options['settings']['loading_place'] === 'footer' );
				wp_register_style( 'responsive-lightbox-nivo', plugins_url( 'assets/nivo/nivo-lightbox' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.css', __FILE__ ), [], '1.3.1' );
				wp_register_style( 'responsive-lightbox-nivo-default', plugins_url( 'assets/nivo/themes/default/default.css', __FILE__ ), [], '1.3.1' );

				$scripts[] = 'responsive-lightbox-nivo';
				$styles[] = 'responsive-lightbox-nivo';
				$styles[] = 'responsive-lightbox-nivo-default';

				$args = array_merge(
					$args,
					[
						'effect'				=> $this->options['configuration']['nivo']['effect'],
						'clickOverlayToClose'	=> $this->options['configuration']['nivo']['click_overlay_to_close'],
						'keyboardNav'			=> $this->options['configuration']['nivo']['keyboard_nav'],
						'errorMessage'			=> esc_html( $this->options['configuration']['nivo']['error_message'] )
					]
				);
				break;

			case 'imagelightbox':
				wp_register_script( 'responsive-lightbox-imagelightbox', plugins_url( 'assets/imagelightbox/imagelightbox' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', __FILE__ ), [ 'jquery', 'responsive-lightbox-sanitizer' ], '1.0.0', $this->options['settings']['loading_place'] === 'footer' );
				wp_register_style( 'responsive-lightbox-imagelightbox', plugins_url( 'assets/imagelightbox/imagelightbox' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.css', __FILE__ ), [], '1.0.0' );

				$scripts[] = 'responsive-lightbox-imagelightbox';
				$styles[] = 'responsive-lightbox-imagelightbox';

				$args = array_merge(
					$args,
					[
						'animationSpeed'		=> $this->options['configuration']['imagelightbox']['animation_speed'],
						'preloadNext'			=> $this->options['configuration']['imagelightbox']['preload_next'],
						'enableKeyboard'		=> $this->options['configuration']['imagelightbox']['enable_keyboard'],
						'quitOnEnd'				=> $this->options['configuration']['imagelightbox']['quit_on_end'],
						'quitOnImageClick'		=> $this->options['configuration']['imagelightbox']['quit_on_image_click'],
						'quitOnDocumentClick'	=> $this->options['configuration']['imagelightbox']['quit_on_document_click'],
					]
				);
				break;

			case 'tosrus':
				wp_register_script( 'responsive-lightbox-tosrus', plugins_url( 'assets/tosrus/jquery.tosrus' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', __FILE__ ), [ 'jquery', 'responsive-lightbox-sanitizer' ], '2.5.0', $this->options['settings']['loading_place'] === 'footer' );
				wp_register_style( 'responsive-lightbox-tosrus', plugins_url( 'assets/tosrus/jquery.tosrus' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.css', __FILE__ ), [], '2.5.0' );

				$scripts[] = 'responsive-lightbox-tosrus';
				$styles[] = 'responsive-lightbox-tosrus';

				$args = array_merge(
					$args,
					[
						'effect'			=> $this->options['configuration']['tosrus']['effect'],
						'infinite'			=> $this->options['configuration']['tosrus']['infinite'],
						'keys'				=> $this->options['configuration']['tosrus']['keys'],
						'autoplay'			=> $this->options['configuration']['tosrus']['autoplay'],
						'pauseOnHover'		=> $this->options['configuration']['tosrus']['pause_on_hover'],
						'timeout'			=> $this->options['configuration']['tosrus']['timeout'],
						'pagination'		=> $this->options['configuration']['tosrus']['pagination'],
						'paginationType'	=> $this->options['configuration']['tosrus']['pagination_type'],
						'closeOnClick'		=> $this->options['configuration']['tosrus']['close_on_click']
					]
				);
				break;

			case 'featherlight':
				wp_register_script( 'responsive-lightbox-featherlight', plugins_url( 'assets/featherlight/featherlight' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', __FILE__ ), [ 'jquery' ], '1.7.14', $this->options['settings']['loading_place'] === 'footer' );
				wp_register_script( 'responsive-lightbox-featherlight-gallery', plugins_url( 'assets/featherlight/featherlight.gallery' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', __FILE__ ), [ 'jquery' ], '1.7.14', $this->options['settings']['loading_place'] === 'footer' );
				wp_register_style( 'responsive-lightbox-featherlight', plugins_url( 'assets/featherlight/featherlight' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.css', __FILE__ ), [], '1.7.14' );
				wp_register_style( 'responsive-lightbox-featherlight-gallery', plugins_url( 'assets/featherlight/featherlight.gallery' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.css', __FILE__ ), [], '1.7.14' );

				$scripts[] = 'responsive-lightbox-featherlight';
				$styles[] = 'responsive-lightbox-featherlight';
				$scripts[] = 'responsive-lightbox-featherlight-gallery';
				$styles[] = 'responsive-lightbox-featherlight-gallery';

				$args = array_merge(
					$args,
					[
						'openSpeed'			=> $this->options['configuration']['featherlight']['open_speed'],
						'closeSpeed'		=> $this->options['configuration']['featherlight']['close_speed'],
						'closeOnClick'		=> $this->options['configuration']['featherlight']['close_on_click'],
						'closeOnEsc'		=> $this->options['configuration']['featherlight']['close_on_esc'],
						'galleryFadeIn'		=> $this->options['configuration']['featherlight']['gallery_fade_in'],
						'galleryFadeOut'	=> $this->options['configuration']['featherlight']['gallery_fade_out']
					]
				);
				break;

			case 'magnific':
				wp_register_script( 'responsive-lightbox-magnific', plugins_url( 'assets/magnific/jquery.magnific-popup' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', __FILE__ ), [ 'jquery' ], '1.2.0', $this->options['settings']['loading_place'] === 'footer' );
				wp_register_style( 'responsive-lightbox-magnific', plugins_url( 'assets/magnific/magnific-popup' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.css', __FILE__ ), [], '1.2.0' );

				$scripts[] = 'responsive-lightbox-magnific';
				$styles[] = 'responsive-lightbox-magnific';

				$args = array_merge(
					$args,
					[
						'disableOn'				=> $this->options['configuration']['magnific']['disable_on'],
						'midClick'				=> $this->options['configuration']['magnific']['mid_click'],
						'preloader'				=> $this->options['configuration']['magnific']['preloader'],
						'closeOnContentClick'	=> $this->options['configuration']['magnific']['close_on_content_click'],
						'closeOnBgClick'		=> $this->options['configuration']['magnific']['close_on_background_click'],
						'closeBtnInside'		=> $this->options['configuration']['magnific']['close_button_inside'],
						'showCloseBtn'			=> $this->options['configuration']['magnific']['show_close_button'],
						'enableEscapeKey'		=> $this->options['configuration']['magnific']['enable_escape_key'],
						'alignTop'				=> $this->options['configuration']['magnific']['align_top'],
						'fixedContentPos'		=> $this->options['configuration']['magnific']['fixed_content_position'],
						'fixedBgPos'			=> $this->options['configuration']['magnific']['fixed_background_position'],
						'autoFocusLast'			=> $this->options['configuration']['magnific']['auto_focus_last']
					]
				);
				break;

			case 'glightbox':
				wp_register_script( 'responsive-lightbox-glightbox', plugins_url( 'assets/glightbox/glightbox' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', __FILE__ ), [ 'responsive-lightbox-sanitizer' ], '3.3.0', $this->options['settings']['loading_place'] === 'footer' );
				wp_register_style( 'responsive-lightbox-glightbox', plugins_url( 'assets/glightbox/glightbox' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.css', __FILE__ ), [], '3.3.0' );

				$scripts[] = 'responsive-lightbox-glightbox';
				$styles[] = 'responsive-lightbox-glightbox';

				$args = array_merge(
					$args,
					[
						'slideEffect'			=> $this->options['configuration']['glightbox']['slide_effect'],
						'closeButton'			=> $this->options['configuration']['glightbox']['close_button'],
						'touchNavigation'		=> $this->options['configuration']['glightbox']['touch_navigation'],
						'keyboardNavigation'	=> $this->options['configuration']['glightbox']['keyboard_navigation'],
						'closeOnOutsideClick'	=> $this->options['configuration']['glightbox']['close_on_outside_click'],
						'loop'					=> $this->options['configuration']['glightbox']['loop'],
						'zoomable'				=> $this->options['configuration']['glightbox']['zoomable']
					]
				);
				break;

			default:
				do_action( 'rl_lightbox_enqueue_scripts' );

				$scripts = apply_filters( 'rl_lightbox_scripts', $scripts );
				$styles = apply_filters( 'rl_lightbox_styles', $styles );
		}

		// run scripts by default
		$contitional_scripts = true;

		if ( $this->options['settings']['conditional_loading'] === true ) {
			global $post;

			if ( is_object( $post ) ) {
				// always load scripts on single rl_gallery pages (gallery added via gallery_preview filter, not in post_content)
				if ( get_post_type( $post ) === 'rl_gallery' && is_singular( 'rl_gallery' ) ) {
					$contitional_scripts = true;
				} else {
					// is gallery present in content
					$has_gallery = has_shortcode( $post->post_content, 'gallery' ) || has_shortcode( $post->post_content, 'rl_gallery' );

					// are images present in content
					preg_match_all( '/<a(.*?)href=(["\'])([^"\']*?)\.(bmp|gif|jpeg|jpg|png|webp|avif)((?:[?#][^"\']*?)?)\2(.*?)>/i', $post->post_content, $links );

					$has_images = (bool) $links[0];

					if ( $has_gallery === false && $has_images === false )
						$contitional_scripts = false;
				}
			}
		}

		wp_register_script( 'dompurify', plugins_url( 'assets/dompurify/purify.min.js', __FILE__ ), [], '3.3.1', $this->options['settings']['loading_place'] === 'footer' );

		wp_register_script( 'responsive-lightbox-infinite-scroll', plugins_url( 'assets/infinitescroll/infinite-scroll.pkgd' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', __FILE__ ), [ 'jquery' ], '4.0.1', $this->options['settings']['loading_place'] === 'footer' );

		wp_register_script( 'responsive-lightbox-sanitizer', plugins_url( 'js/sanitizer.js', __FILE__ ), [ 'dompurify' ], $this->defaults['version'], $this->options['settings']['loading_place'] === 'footer' );

		// Default iframe host allowlist. Plugins/themes may extend via the
		// `rl_sanitize_allowed_hosts` filter. Hostnames should be bare hostnames
		// (e.g. 'youtube.com', 'player.vimeo.com'). Same-origin URLs are always allowed.
		$default_sanitize_allowed_hosts = array(
			'youtube.com',
			'www.youtube.com',
			'youtu.be',
			'vimeo.com',
			'player.vimeo.com',
		);

		$sanitize_allowed_hosts = (array) apply_filters( 'rl_sanitize_allowed_hosts', $default_sanitize_allowed_hosts );

		// Expose allowed hosts to the frontend sanitizer script before it runs.
		wp_add_inline_script(
			'responsive-lightbox-sanitizer',
			'window.RLG = window.RLG || {}; window.RLG.sanitizeAllowedHosts = ' . wp_json_encode( array_values( $sanitize_allowed_hosts ) ) . ';',
			'before'
		);

		wp_register_script( 'responsive-lightbox', plugins_url( 'js/front.js', __FILE__ ), [ 'jquery', 'underscore', 'responsive-lightbox-infinite-scroll', 'responsive-lightbox-sanitizer' ], $this->defaults['version'], $this->options['settings']['loading_place'] === 'footer' );

		$args['woocommerce_gallery'] = false;

		if ( class_exists( 'WooCommerce' ) ) {
			global $woocommerce;

			if ( $this->options['settings']['woocommerce_gallery_lightbox'] === true ) {
				if ( version_compare( $woocommerce->version, '3.0', ">=" ) )
					$args['woocommerce_gallery'] = true;
			}
		}

		$scripts[] = 'responsive-lightbox';

		$args['ajaxurl'] = admin_url( 'admin-ajax.php' );
		$args['nonce'] = wp_create_nonce( 'rl_nonce' );
		$args['preview'] = isset( $_GET['rl_gallery_revision_id'], $_GET['preview'] ) && $_GET['preview'] === 'true';
		$args['postId'] = (int) get_the_ID();
		$args['scriptExtension'] = array_key_exists( $args['script'], apply_filters( 'rl_settings_licenses', [] ) );

		// only enqueue if conditional loading allows it
		if ( $contitional_scripts ) {
			// enqueue scripts
			if ( $scripts && is_array( $scripts ) ) {
				foreach ( $scripts as $script ) {
					wp_enqueue_script( $script );
				}

				wp_add_inline_script( 'responsive-lightbox', 'var rlArgs = ' . wp_json_encode( $args ) . ";\n", 'before' );
			}

			// enqueue styles
			if ( $styles && is_array( $styles ) ) {
				foreach ( $styles as $style ) {
					wp_enqueue_style( $style );
				}
			}
		}

	}

	/**
	 * Convert HEX to RGB color.
	 *
	 * @param string $color
	 * @return bool|array
	 */
	public function hex2rgb( $color ) {
		if ( ! is_string( $color ) )
			return false;

		// with hash?
		if ( $color[0] === '#' )
			$color = substr( $color, 1 );

		if ( sanitize_hex_color_no_hash( $color ) !== $color )
			return false;

		// 6 hex digits?
		if ( strlen( $color ) === 6 )
			list( $r, $g, $b ) = [ $color[0] . $color[1], $color[2] . $color[3], $color[4] . $color[5] ];
		// 3 hex digits?
		elseif ( strlen( $color ) === 3 )
			list( $r, $g, $b ) = [ $color[0] . $color[0], $color[1] . $color[1], $color[2] . $color[2] ];
		else
			return false;

		return [ 'r' => hexdec( $r ), 'g' => hexdec( $g ), 'b' => hexdec( $b ) ];
	}

	/**
	 * Check rate limit for AJAX actions to prevent abuse.
	 *
	 * @param string $action The action name to rate limit.
	 * @param int $max_requests Maximum number of requests allowed in time window.
	 * @param int $time_window Time window in seconds.
	 * @return bool True if request is allowed, false if rate limit exceeded.
	 */
	public function check_rate_limit( $action, $max_requests = 30, $time_window = 60 ) {
		$current_user_id = get_current_user_id();

		// skip rate limiting for administrators
		if ( $current_user_id && current_user_can( 'manage_options' ) ) {
			return true;
		}

		// Anonymous requests use only the server-restored connecting peer address.
		// Forwarding headers are attacker-controlled without an approved trusted proxy boundary.
		$client_ip = 'rl-anon-shared';
		if ( isset( $_SERVER['REMOTE_ADDR'] ) && is_string( $_SERVER['REMOTE_ADDR'] ) ) {
			$remote_addr = strtolower( trim( $_SERVER['REMOTE_ADDR'] ) );
			if ( $remote_addr !== '' && filter_var( $remote_addr, FILTER_VALIDATE_IP ) )
				$client_ip = $remote_addr;
		}

		$transient_key = 'rl_rate_limit_' . $action . '_' . ( $current_user_id ? $current_user_id : md5( $client_ip ) );
		$window_key = $transient_key . '_window_end';
		$requests = get_transient( $transient_key );
		$now = apply_filters( 'rl_rate_limit_time', time() );
		$now = is_numeric( $now ) ? (int) $now : time();

		// Keep the established integer count shape so mixed-version caches remain safe.
		if ( false === $requests || ! is_int( $requests ) || $requests < 1 ) {
			$window_end = $now + $time_window;
			set_transient( $transient_key, 1, $time_window );
			set_transient( $window_key, $window_end, $time_window );
			return true;
		}

		$window_end = get_transient( $window_key );
		if ( is_numeric( $window_end ) && (int) $window_end <= $now ) {
			$window_end = $now + $time_window;
			set_transient( $transient_key, 1, $time_window );
			set_transient( $window_key, $window_end, $time_window );
			return true;
		}

		if ( ! is_numeric( $window_end ) ) {
			// Integer-only entries are from the prior sliding-window implementation
			// or a cache that lost its TTL. Establish a finite fixed end even when
			// the count is already at the limit, so it can recover at that boundary.
			$window_end = $now + $time_window;
			set_transient( $window_key, $window_end, $time_window );

			if ( $requests >= $max_requests ) {
				set_transient( $transient_key, $requests, $time_window );
				return false;
			}

			set_transient( $transient_key, $requests + 1, $time_window );
			return true;
		}

		$window_end = (int) $window_end;
		if ( $requests >= $max_requests )
			return false;

		// Re-save only the count. Its TTL is capped at the original window end;
		// the companion transient remains untouched by accepted and denied requests.
		$remaining = $window_end - $now;
		if ( $remaining <= 0 ) {
			$window_end = $now + $time_window;
			set_transient( $transient_key, 1, $time_window );
			set_transient( $window_key, $window_end, $time_window );
			return true;
		}

		set_transient( $transient_key, $requests + 1, $remaining );
		return true;
	}
}

/**
 * Initialize Responsive Lightbox.
 */
function Responsive_Lightbox() {
	static $instance;

	// first call to instance() initializes the plugin
	if ( $instance === null || ! ( $instance instanceof Responsive_Lightbox ) )
		$instance = Responsive_Lightbox::instance();

	return $instance;
}

Responsive_Lightbox();
