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<?php // phpcs:ignore eWordPress.Files.FileName.InvalidClassFileName
/**
 * Module Name: Gallery widget
 *
 * @package automattic/jetpack
 */

// phpcs:disable Universal.Files.SeparateFunctionsFromOO.Mixed -- TODO: Move classes to appropriately-named class files.

use Automattic\Jetpack\Assets;
use Automattic\Jetpack\Image_CDN\Image_CDN_Core;

if ( ! defined( 'ABSPATH' ) ) {
	exit( 0 );
}

/**
 * Jetpack_Gallery_Widget main class.
 */
class Jetpack_Gallery_Widget extends WP_Widget {
	const THUMB_SIZE    = 45;
	const DEFAULT_WIDTH = 265;

/**
	 * The width of the gallery widget.
	 * May be customized by the 'gallery_widget_content_width' filter.
	 *
	 * @var int
	 */
	protected $instance_width;

/**
	 * Jetpack_Gallery_Widget constructor.
	 */
	public function __construct() {
		$widget_ops = array(
			'classname'                   => 'widget-gallery',
			'description'                 => __( 'Display a photo gallery or slideshow', 'jetpack' ),
			'customize_selective_refresh' => true,
		);

add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_scripts' ) );

parent::__construct(
			'gallery',
			/** This filter is documented in modules/widgets/facebook-likebox.php */
			apply_filters( 'jetpack_widget_name', __( 'Gallery', 'jetpack' ) ),
			$widget_ops
		);

if ( is_customize_preview() ) {
			add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_frontend_scripts' ) );

if ( class_exists( 'Jetpack_Tiled_Gallery' ) ) {
				add_action( 'wp_enqueue_scripts', array( 'Jetpack_Tiled_Gallery', 'default_scripts_and_styles' ) );
			}

if ( class_exists( 'Jetpack_Slideshow_Shortcode' ) ) {
				$slideshow = new Jetpack_Slideshow_Shortcode();
				add_action( 'wp_enqueue_scripts', array( $slideshow, 'enqueue_scripts' ) );
			}

if ( class_exists( 'Jetpack_Carousel' ) ) {
				$carousel = new Jetpack_Carousel();
				add_action( 'wp_enqueue_scripts', array( $carousel, 'enqueue_assets' ) );
			}
		}
	}

/**
	 * Display the widget.
	 *
	 * @param array $args Display arguments including before_title, after_title, before_widget, and after_widget.
	 * @param array $instance The settings for the particular instance of the widget.
	 */
	public function widget( $args, $instance ) {
		$instance = wp_parse_args( (array) $instance, $this->defaults() );

$this->enqueue_frontend_scripts();

$before_widget = $args['before_widget'] ?? '';
		$before_title  = $args['before_title'] ?? '';
		$after_title   = $args['after_title'] ?? '';
		$after_widget  = $args['after_widget'] ?? '';

$instance['attachments'] = $this->get_attachments( $instance );

$classes = array();

$classes[] = 'widget-gallery-' . $instance['type'];

/*
		 * Due to a bug in the carousel plugin,
		 * carousels will be triggered for all tiled galleries that exist on a page with other tiled galleries,
		 * regardless of whether or not the widget was set to Carousel mode.
		 * The onClick selector is simply too broad, since it was not written with widgets in mind.
		 * This special class prevents that behavior, via an override handler in gallery.js.
		 */
		if ( 'carousel' !== $instance['link'] && 'slideshow' !== $instance['type'] ) {
			$classes[] = 'no-carousel';
		} else {
			$classes[] = 'carousel';
		}

$classes = implode( ' ', $classes );

if ( 'carousel' === $instance['link'] ) {
			require_once plugin_dir_path( realpath( __DIR__ . '/../carousel/jetpack-carousel.php' ) ) . 'jetpack-carousel.php';

if ( class_exists( 'Jetpack_Carousel' ) ) {
				// Create new carousel so we can use the enqueue_assets() method. Not ideal, but there is a decent amount
				// of logic in that method that shouldn't be duplicated.
				$carousel = new Jetpack_Carousel();

$carousel->enqueue_assets();
			}
		}

echo $before_widget . "\n"; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped

/** This filter is documented in core/src/wp-includes/default-widgets.php */
		$title = apply_filters( 'widget_title', $instance['title'] );

if ( $title ) {
			echo $before_title . $title . $after_title . "\n"; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
		}

echo '<div class="' . esc_attr( $classes ) . '">' . "\n";

$method = $instance['type'] . '_widget';

/**
		 * Allow the width of a gallery to be altered by themes or other code.
		 *
		 * @module widgets
		 *
		 * @since 2.5.0
		 *
		 * @param int self::DEFAULT_WIDTH Default gallery width. Default is 265.
		 * @param string $args Display arguments including before_title, after_title, before_widget, and after_widget.
		 * @param array $instance The settings for the particular instance of the widget.
		 */
		$this->instance_width = apply_filters( 'gallery_widget_content_width', self::DEFAULT_WIDTH, $args, $instance );

// Register a filter to modify the tiled_gallery_content_width, so Jetpack_Tiled_Gallery
		// can appropriately size the tiles.
		add_filter( 'tiled_gallery_content_width', array( $this, 'tiled_gallery_content_width' ) );

if ( method_exists( $this, $method ) ) {
			echo $this->$method( $args, $instance ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
		}

// Remove the stored $instance_width, as it is no longer needed.
		$this->instance_width = null;

// Remove the filter, so any Jetpack_Tiled_Gallery in a post is not affected.
		remove_filter( 'tiled_gallery_content_width', array( $this, 'tiled_gallery_content_width' ) );

echo "\n" . '</div>'; // .widget-gallery-$type

echo "\n" . $after_widget; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped

/** This action is documented in modules/widgets/gravatar-profile.php */
		do_action( 'jetpack_stats_extra', 'widget_view', 'gallery' );
	}

/**
	 * Fetch the images attached to the gallery Widget
	 *
	 * @param array $instance The Widget instance for which you'd like attachments.
	 * @return array Array of attachment objects for the Widget in $instance
	 */
	public function get_attachments( $instance ) {
		$ids = explode( ',', $instance['ids'] );

if ( isset( $instance['random'] ) && 'on' === $instance['random'] ) {
			shuffle( $ids );
		}

$attachments_query = new WP_Query(
			array(
				'post__in'       => $ids,
				'post_status'    => 'inherit',
				'post_type'      => 'attachment',
				'post_mime_type' => 'image',
				'posts_per_page' => -1,
				'orderby'        => 'post__in',
			)
		);

$attachments = $attachments_query->get_posts();

wp_reset_postdata();

return $attachments;
	}

/**
	 * Generate HTML for a rectangular, tiled Widget
	 *
	 * @param array $args Display arguments including before_title, after_title, before_widget, and after_widget.
	 * @param array $instance The Widget instance to generate HTML for.
	 * @return string String of HTML representing a rectangular gallery
	 */
	public function rectangular_widget( $args, $instance ) {
		if ( ! class_exists( 'Jetpack_Tiled_Gallery' )
			&& ! class_exists( 'Jetpack_Tiled_Gallery_Layout_Rectangular' ) ) {
			return;
		}

Jetpack_Tiled_Gallery::default_scripts_and_styles();

$layout = new Jetpack_Tiled_Gallery_Layout_Rectangular( $instance['attachments'], $instance['link'], false, 3 );
		return $layout->HTML();
	}

/**
	 * Generate HTML for a square (grid style) Widget
	 *
	 * @param array $args Display arguments including before_title, after_title, before_widget, and after_widget.
	 * @param array $instance The Widget instance to generate HTML for.
	 * @return string String of HTML representing a square gallery
	 */
	public function square_widget( $args, $instance ) {
		if ( ! class_exists( 'Jetpack_Tiled_Gallery' )
			&& ! class_exists( 'Jetpack_Tiled_Gallery_Layout_Square' ) ) {
			return;
		}

Jetpack_Tiled_Gallery::default_scripts_and_styles();

$layout = new Jetpack_Tiled_Gallery_Layout_Square( $instance['attachments'], $instance['link'], false, 3 );
		return $layout->HTML();
	}

/**
	 * Generate HTML for a circular (grid style) Widget
	 *
	 * @param array $args Display arguments including before_title, after_title, before_widget, and after_widget.
	 * @param array $instance The Widget instance to generate HTML for.
	 * @return string String of HTML representing a circular gallery
	 */
	public function circle_widget( $args, $instance ) {
		if ( ! class_exists( 'Jetpack_Tiled_Gallery' )
			&& ! class_exists( 'Jetpack_Tiled_Gallery_Layout_Circle' ) ) {
			return;
		}

Jetpack_Tiled_Gallery::default_scripts_and_styles();

$layout = new Jetpack_Tiled_Gallery_Layout_Circle( $instance['attachments'], $instance['link'], false, 3 );
		return $layout->HTML();
	}

/**
	 * Generate HTML for a slideshow Widget
	 *
	 * @todo Is slideshow_widget() still used?
	 *
	 * @param array $args Display arguments including before_title, after_title, before_widget, and after_widget.
	 * @param array $instance The Widget instance to generate HTML for.
	 * @return string String of HTML representing a slideshow gallery
	 */
	public function slideshow_widget( $args, $instance ) {
		global $content_width;

require_once plugin_dir_path( realpath( __DIR__ . '/../shortcodes/slideshow.php' ) ) . 'slideshow.php';

if ( ! class_exists( 'Jetpack_Slideshow_Shortcode' ) ) {
			return;
		}

if ( count( $instance['attachments'] ) < 1 ) {
			return;
		}

$slideshow = new Jetpack_Slideshow_Shortcode();

$slideshow->enqueue_scripts();

$gallery_instance = 'widget-' . $args['widget_id'];

$gallery = array();

foreach ( $instance['attachments'] as $attachment ) {
			$attachment_image_src = wp_get_attachment_image_src( $attachment->ID, 'full' );
			$attachment_image_src = Image_CDN_Core::cdn_url( $attachment_image_src[0], array( 'w' => $this->instance_width ) ); /** [url, width, height] */

$caption = wptexturize( wp_strip_all_tags( $attachment->post_excerpt ) );

$gallery[] = (object) array(
				'src'     => (string) esc_url_raw( $attachment_image_src ),
				'id'      => (string) $attachment->ID,
				'caption' => (string) $caption,
			);
		}

$max_width  = (int) get_option( 'large_size_w' );
		$max_height = 175;

if ( (int) $content_width > 0 ) {
			$max_width = min( (int) $content_width, $max_width );
		}

$color   = Jetpack_Options::get_option( 'slideshow_background_color', 'black' );
		$js_attr = array(
			'gallery'   => $gallery,
			'selector'  => $gallery_instance,
			'width'     => $max_width,
			'height'    => $max_height,
			'trans'     => 'fade',
			'color'     => $color,
			'autostart' => true,
		);

$html = $slideshow->slideshow_js( $js_attr );

return $html;
	}

/**
	 * Used to adjust the content width of Jetpack_Tiled_Gallery's in sidebars
	 *
	 * $this->instance_width is filtered in widget() and this filter is added then removed in widget()
	 *
	 * @return int The filtered width
	 */
	public function tiled_gallery_content_width() {
		return $this->instance_width;
	}

/**
	 * Outputs the widget settings form.
	 *
	 * @html-template-var array $instance
	 * @html-template-var array<string,array<string|int,string|int>> $allowed_values
	 *
	 * @param array $instance Current settings.
	 * @return string|void
	 */
	public function form( $instance ) {
		$defaults       = $this->defaults();
		$allowed_values = $this->allowed_values(); // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable -- Used in included form template.

$instance = wp_parse_args( (array) $instance, $defaults );

include __DIR__ . '/gallery/templates/form.php';
	}

/**
	 * Save the widget options.
	 *
	 * @param array $new_instance The new instance options.
	 * @param array $old_instance The old instance options.
	 * @return array The saved options.
	 */
	public function update( $new_instance, $old_instance ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
		$instance = $this->sanitize( $new_instance );

return $instance;
	}

/**
	 * Sanitize the $instance's values to the set of allowed values. If a value is not acceptable,
	 * it is set to its default.
	 *
	 * Helps keep things nice and secure by listing only allowed values.
	 *
	 * @param array $instance The Widget instance to sanitize values for.
	 * @return array $instance The Widget instance with values sanitized
	 */
	public function sanitize( $instance ) {
		$allowed_values = $this->allowed_values();
		$defaults       = $this->defaults();

foreach ( $instance as $key => $value ) {
			if ( ! is_scalar( $value ) ) {
				// $instance may hold an Array value type for the Jetpack widget visibility feature.
				continue;
			}

$value = trim( $value );

if ( isset( $allowed_values[ $key ] ) && $allowed_values[ $key ] && ! array_key_exists( $value, $allowed_values[ $key ] ) ) {
				$instance[ $key ] = $defaults[ $key ];
			} else {
				$instance[ $key ] = sanitize_text_field( $value );
			}
		}

return $instance;
	}

/**
	 * Return a multi-dimensional array of allowed values (and their labels) for all widget form
	 * elements
	 *
	 * To allow all values on an input, omit it from the returned array
	 *
	 * @return array Array of allowed values for each option
	 */
	public function allowed_values() {
		$max_columns = 5;

// Create an associative array of allowed column values. This just automates the generation of
		// column <option>s, from 1 to $max_columns.
		$allowed_columns = array_combine( range( 1, $max_columns ), range( 1, $max_columns ) );

return array(
			'type'    => array(
				'rectangular' => __( 'Tiles', 'jetpack' ),
				'square'      => __( 'Square Tiles', 'jetpack' ),
				'circle'      => __( 'Circles', 'jetpack' ),
				'slideshow'   => __( 'Slideshow', 'jetpack' ),
			),
			'columns' => $allowed_columns,
			'link'    => array(
				'carousel' => __( 'Carousel', 'jetpack' ),
				'post'     => __( 'Attachment Page', 'jetpack' ),
				'file'     => __( 'Media File', 'jetpack' ),
			),
		);
	}

/**
	 * Return an associative array of default values
	 *
	 * These values are used in new widgets as well as when sanitizing input. If a given value is not allowed,
	 * as defined in allowed_values(), that input is set to the default value defined here.
	 *
	 * @return array Array of default values for the Widget's options
	 */
	public function defaults() {
		return array(
			'title'   => '',
			'type'    => 'rectangular',
			'ids'     => '',
			'columns' => 3,
			'link'    => 'carousel',
		);
	}

/**
	 * Enqueue frontend scripts.
	 */
	public function enqueue_frontend_scripts() {
		wp_register_script(
			'gallery-widget',
			Assets::get_file_url_for_environment(
				'_inc/build/widgets/gallery/js/gallery.min.js',
				'modules/widgets/gallery/js/gallery.js'
			),
			array( 'jquery' ),
			JETPACK__VERSION,
			false
		);

wp_enqueue_script( 'gallery-widget' );
	}

/**
	 * Enqueue admin scripts and styles.
	 */
	public function enqueue_admin_scripts() {
		global $pagenow;

if ( 'widgets.php' === $pagenow || 'customize.php' === $pagenow ) {
			wp_enqueue_media();

wp_enqueue_script(
				'gallery-widget-admin',
				Assets::get_file_url_for_environment(
					'_inc/build/widgets/gallery/js/admin.min.js',
					'modules/widgets/gallery/js/admin.js'
				),
				array(
					'jquery',
					'media-models',
					'media-views',
				),
				'20150501',
				false
			);

$js_settings = array(
				'thumbSize' => self::THUMB_SIZE,
			);

wp_localize_script( 'gallery-widget-admin', '_wpGalleryWidgetAdminSettings', $js_settings );
			wp_enqueue_style(
				'gallery-widget-admin',
				plugins_url( '/gallery/css/admin.css', __FILE__ ),
				array(),
				JETPACK__VERSION
			);
			wp_style_add_data( 'gallery-widget-admin', 'rtl', 'replace' );
		}
	}
}

add_action( 'widgets_init', 'jetpack_gallery_widget_init' );

/**
 * Jetpack Gallery widget init; the widget is conditionally registered.
 */
function jetpack_gallery_widget_init() {
	/**
	 * Allow the Gallery Widget to be enabled even when Core supports the Media Gallery Widget
	 *
	 * @module widgets
	 *
	 * @since 5.5.0
	 *
	 * @param bool false Whether to force-enable the gallery widget
	 */
	if (
		! apply_filters( 'jetpack_force_enable_gallery_widget', false )
		&& class_exists( 'WP_Widget_Media_Gallery' )
		&& Jetpack_Options::get_option( 'gallery_widget_migration' )
	) {
		return;
	}
	if ( ! method_exists( 'Jetpack', 'is_module_active' ) || Jetpack::is_module_active( 'tiled-gallery' ) ) {
		register_widget( 'Jetpack_Gallery_Widget' );
	}
}

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