<?php

/**

 * Widget API: WP_Widget_Media_Image class

 *

 * @package WordPress

 * @subpackage Widgets

 * @since 4.8.0

 */

/**

 * Core class that implements an image widget.

 *

 * @since 4.8.0

 *

 * @see WP_Widget

 */

class WP_Widget_Media_Image extends WP_Widget_Media {

	/**

	 * Constructor.

	 *

	 * @since  4.8.0

	 */

	public function __construct() {

		parent::__construct( 'media_image', __( 'Image' ), array(

			'description' => __( 'Displays an image.' ),

			'mime_type'   => 'image',

		) );

		$this->l10n = array_merge( $this->l10n, array(

			'no_media_selected' => __( 'No image selected' ),

			'add_media' => _x( 'Add Image', 'label for button in the image widget' ),

			'replace_media' => _x( 'Replace Image', 'label for button in the image widget; should preferably not be longer than ~13 characters long' ),

			'edit_media' => _x( 'Edit Image', 'label for button in the image widget; should preferably not be longer than ~13 characters long' ),

			'missing_attachment' => sprintf(

				/* translators: %s: URL to media library */

				__( 'We can&#8217;t find that image. Check your <a href="%s">media library</a> and make sure it wasn&#8217;t deleted.' ),

				esc_url( admin_url( 'upload.php' ) )

			),

			/* translators: %d: widget count */

			'media_library_state_multi' => _n_noop( 'Image Widget (%d)', 'Image Widget (%d)' ),

			'media_library_state_single' => __( 'Image Widget' ),

		) );

	}

	/**

	 * Get schema for properties of a widget instance (item).

	 *

	 * @since  4.8.0

	 *

	 * @see WP_REST_Controller::get_item_schema()

	 * @see WP_REST_Controller::get_additional_fields()

	 * @link https://core.trac.wordpress.org/ticket/35574

	 * @return array Schema for properties.

	 */

	public function get_instance_schema() {

		return array_merge(

			parent::get_instance_schema(),

			array(

				'size' => array(

					'type' => 'string',

					'enum' => array_merge( get_intermediate_image_sizes(), array( 'full', 'custom' ) ),

					'default' => 'medium',

					'description' => __( 'Size' ),

				),

				'width' => array( // Via 'customWidth', only when size=custom; otherwise via 'width'.

					'type' => 'integer',

					'minimum' => 0,

					'default' => 0,

					'description' => __( 'Width' ),

				),

				'height' => array( // Via 'customHeight', only when size=custom; otherwise via 'height'.

					'type' => 'integer',

					'minimum' => 0,

					'default' => 0,

					'description' => __( 'Height' ),

				),

				'caption' => array(

					'type' => 'string',

					'default' => '',

					'sanitize_callback' => 'wp_kses_post',

					'description' => __( 'Caption' ),

					'should_preview_update' => false,

				),

				'alt' => array(

					'type' => 'string',

					'default' => '',

					'sanitize_callback' => 'sanitize_text_field',

					'description' => __( 'Alternative Text' ),

				),

				'link_type' => array(

					'type' => 'string',

					'enum' => array( 'none', 'file', 'post', 'custom' ),

					'default' => 'custom',

					'media_prop' => 'link',

					'description' => __( 'Link To' ),

					'should_preview_update' => true,

				),

				'link_url' => array(

					'type' => 'string',

					'default' => '',

					'format' => 'uri',

					'media_prop' => 'linkUrl',

					'description' => __( 'URL' ),

					'should_preview_update' => true,

				),

				'image_classes' => array(

					'type' => 'string',

					'default' => '',

					'sanitize_callback' => array( $this, 'sanitize_token_list' ),

					'media_prop' => 'extraClasses',

					'description' => __( 'Image CSS Class' ),

					'should_preview_update' => false,

				),

				'link_classes' => array(

					'type' => 'string',

					'default' => '',

					'sanitize_callback' => array( $this, 'sanitize_token_list' ),

					'media_prop' => 'linkClassName',

					'should_preview_update' => false,

					'description' => __( 'Link CSS Class' ),

				),

				'link_rel' => array(

					'type' => 'string',

					'default' => '',

					'sanitize_callback' => array( $this, 'sanitize_token_list' ),

					'media_prop' => 'linkRel',

					'description' => __( 'Link Rel' ),

					'should_preview_update' => false,

				),

				'link_target_blank' => array(

					'type' => 'boolean',

					'default' => false,

					'media_prop' => 'linkTargetBlank',

					'description' => __( 'Open link in a new tab' ),

					'should_preview_update' => false,

				),

				'image_title' => array(

					'type' => 'string',

					'default' => '',

					'sanitize_callback' => 'sanitize_text_field',

					'media_prop' => 'title',

					'description' => __( 'Image Title Attribute' ),

					'should_preview_update' => false,

				),

				/*

				 * There are two additional properties exposed by the PostImage modal

				 * that don't seem to be relevant, as they may only be derived read-only

				 * values:

				 * - originalUrl

				 * - aspectRatio

				 * - height (redundant when size is not custom)

				 * - width (redundant when size is not custom)

				 */

			)

		);

	}

	/**

	 * Render the media on the frontend.

	 *

	 * @since  4.8.0

	 *

	 * @param array $instance Widget instance props.

	 * @return void

	 */

	public function render_media( $instance ) {

		$instance = array_merge( wp_list_pluck( $this->get_instance_schema(), 'default' ), $instance );

		$instance = wp_parse_args( $instance, array(

			'size' => 'thumbnail',

		) );

		$attachment = null;

		if ( $this->is_attachment_with_mime_type( $instance['attachment_id'], $this->widget_options['mime_type'] ) ) {

			$attachment = get_post( $instance['attachment_id'] );

		}

		if ( $attachment ) {

			$caption = '';

			if ( ! isset( $instance['caption'] ) ) {

				$caption = $attachment->post_excerpt;

			} elseif ( trim( $instance['caption'] ) ) {

				$caption = $instance['caption'];

			}

			$image_attributes = array(

				'class' => sprintf( 'image wp-image-%d %s', $attachment->ID, $instance['image_classes'] ),

				'style' => 'max-width: 100%; height: auto;',

			);

			if ( ! empty( $instance['image_title'] ) ) {

				$image_attributes['title'] = $instance['image_title'];

			}

			if ( $instance['alt'] ) {

				$image_attributes['alt'] = $instance['alt'];

			}

			$size = $instance['size'];

			if ( 'custom' === $size || ! in_array( $size, array_merge( get_intermediate_image_sizes(), array( 'full' ) ), true ) ) {

				$size = array( $instance['width'], $instance['height'] );

			}

			$image_attributes['class'] .= sprintf( ' attachment-%1$s size-%1$s', is_array( $size ) ? join( 'x', $size ) : $size );

			$image = wp_get_attachment_image( $attachment->ID, $size, false, $image_attributes );

			$caption_size = _wp_get_image_size_from_meta( $instance['size'], wp_get_attachment_metadata( $attachment->ID ) );

			$width = empty( $caption_size[0] ) ? 0 : $caption_size[0];

		} else {

			if ( empty( $instance['url'] ) ) {

				return;

			}

			$instance['size'] = 'custom';

			$caption = $instance['caption'];

			$width   = $instance['width'];

			$classes = 'image ' . $instance['image_classes'];

			if ( 0 === $instance['width'] ) {

				$instance['width'] = '';

			}

			if ( 0 === $instance['height'] ) {

				$instance['height'] = '';

			}

			$image = sprintf( '<img class="%1$s" src="%2$s" alt="%3$s" width="%4$s" height="%5$s" />',

				esc_attr( $classes ),

				esc_url( $instance['url'] ),

				esc_attr( $instance['alt'] ),

				esc_attr( $instance['width'] ),

				esc_attr( $instance['height'] )

			);

		} // End if().

		$url = '';

		if ( 'file' === $instance['link_type'] ) {

			$url = $attachment ? wp_get_attachment_url( $attachment->ID ) : $instance['url'];

		} elseif ( $attachment && 'post' === $instance['link_type'] ) {

			$url = get_attachment_link( $attachment->ID );

		} elseif ( 'custom' === $instance['link_type'] && ! empty( $instance['link_url'] ) ) {

			$url = $instance['link_url'];

		}

		if ( $url ) {

			$link = sprintf( '<a href="%s"', esc_url( $url ) );

			if ( ! empty( $instance['link_classes'] ) ) {

				$link .= sprintf( ' class="%s"', esc_attr( $instance['link_classes'] ) );

			}

			if ( ! empty( $instance['link_rel'] ) ) {

				$link .= sprintf( ' rel="%s"', esc_attr( $instance['link_rel'] ) );

			}

			if ( ! empty( $instance['link_target_blank'] ) ) {

				$link .= ' target="_blank"';

			}

			$link .= '>';

			$link .= $image;

			$link .= '</a>';

			$image = $link;

		}

		if ( $caption ) {

			$image = img_caption_shortcode( array(

				'width' => $width,

				'caption' => $caption,

			), $image );

		}

		echo $image;

	}

	/**

	 * Loads the required media files for the media manager and scripts for media widgets.

	 *

	 * @since 4.8.0

	 */

	public function enqueue_admin_scripts() {

		parent::enqueue_admin_scripts();

		$handle = 'media-image-widget';

		wp_enqueue_script( $handle );

		$exported_schema = array();

		foreach ( $this->get_instance_schema() as $field => $field_schema ) {

			$exported_schema[ $field ] = wp_array_slice_assoc( $field_schema, array( 'type', 'default', 'enum', 'minimum', 'format', 'media_prop', 'should_preview_update' ) );

		}

		wp_add_inline_script(

			$handle,

			sprintf(

				'wp.mediaWidgets.modelConstructors[ %s ].prototype.schema = %s;',

				wp_json_encode( $this->id_base ),

				wp_json_encode( $exported_schema )

			)

		);

		wp_add_inline_script(

			$handle,

			sprintf(

				'

					wp.mediaWidgets.controlConstructors[ %1$s ].prototype.mime_type = %2$s;

					wp.mediaWidgets.controlConstructors[ %1$s ].prototype.l10n = _.extend( {}, wp.mediaWidgets.controlConstructors[ %1$s ].prototype.l10n, %3$s );

				',

				wp_json_encode( $this->id_base ),

				wp_json_encode( $this->widget_options['mime_type'] ),

				wp_json_encode( $this->l10n )

			)

		);

	}

	/**

	 * Render form template scripts.

	 *

	 * @since 4.8.0

	 */

	public function render_control_template_scripts() {

		parent::render_control_template_scripts();

		?>

		<script type="text/html" id="tmpl-wp-media-widget-image-fields">

			<# var elementIdPrefix = 'el' + String( Math.random() ) + '_'; #>

			<# if ( data.url ) { #>

			<p class="media-widget-image-link">

				<label for="{{ elementIdPrefix }}linkUrl"><?php esc_html_e( 'Link to:' ); ?></label>

				<input id="{{ elementIdPrefix }}linkUrl" type="text" class="widefat link" value="{{ data.link_url }}" placeholder="http://" pattern="((\w+:)?\/\/\w.*|\w+:(?!\/\/$)|\/|\?|#).*">

			</p>

			<# } #>

		</script>

		<script type="text/html" id="tmpl-wp-media-widget-image-preview">

			<# var describedById = 'describedBy-' + String( Math.random() ); #>

			<# if ( data.error && 'missing_attachment' === data.error ) { #>

				<div class="notice notice-error notice-alt notice-missing-attachment">

					<p><?php echo $this->l10n['missing_attachment']; ?></p>

				</div>

			<# } else if ( data.error ) { #>

				<div class="notice notice-error notice-alt">

					<p><?php _e( 'Unable to preview media due to an unknown error.' ); ?></p>

				</div>

			<# } else if ( data.url ) { #>

				<img class="attachment-thumb" src="{{ data.url }}" draggable="false" alt="{{ data.alt }}" <# if ( ! data.alt && data.currentFilename ) { #> aria-describedby="{{ describedById }}" <# } #> />

				<# if ( ! data.alt && data.currentFilename ) { #>

					<p class="hidden" id="{{ describedById }}"><?php

						/* translators: placeholder is image filename */

						echo sprintf( __( 'Current image: %s' ), '{{ data.currentFilename }}' );

					?></p>

				<# } #>

			<# } #>

		</script>

		<?php

	}

}