<?php

/**

 * Widget API: WP_Widget_Block class

 *

 * @package WordPress

 * @subpackage Widgets

 * @since 5.8.0

 */

/**

 * Core class used to implement a Block widget.

 *

 * @since 5.8.0

 *

 * @see WP_Widget

 */

class WP_Widget_Block extends WP_Widget {

	/**

	 * Default instance.

	 *

	 * @since 5.8.0

	 * @var array

	 */

	protected $default_instance = array(

		'content' => '',

	);

	/**

	 * Sets up a new Block widget instance.

	 *

	 * @since 5.8.0

	 */

	public function __construct() {

		$widget_ops  = array(

			'classname'                   => 'widget_block',

			'description'                 => __( 'A widget containing a block.' ),

			'customize_selective_refresh' => true,

			'show_instance_in_rest'       => true,

		);

		$control_ops = array(

			'width'  => 400,

			'height' => 350,

		);

		parent::__construct( 'block', __( 'Block' ), $widget_ops, $control_ops );

		add_filter( 'is_wide_widget_in_customizer', array( $this, 'set_is_wide_widget_in_customizer' ), 10, 2 );

	}

	/**

	 * Outputs the content for the current Block widget instance.

	 *

	 * @since 5.8.0

	 *

	 * @param array $args     Display arguments including 'before_title', 'after_title',

	 *                        'before_widget', and 'after_widget'.

	 * @param array $instance Settings for the current Block widget instance.

	 */

	public function widget( $args, $instance ) {

		$instance = wp_parse_args( $instance, $this->default_instance );

		echo str_replace(

			'widget_block',

			$this->get_dynamic_classname( $instance['content'] ),

			$args['before_widget']

		);

		/**

		 * Filters the content of the Block widget before output.

		 *

		 * @since 5.8.0

		 *

		 * @param string          $content  The widget content.

		 * @param array           $instance Array of settings for the current widget.

		 * @param WP_Widget_Block $widget   Current Block widget instance.

		 */

		echo apply_filters(

			'widget_block_content',

			$instance['content'],

			$instance,

			$this

		);

		echo $args['after_widget'];

	}

	/**

	 * Calculates the classname to use in the block widget's container HTML.

	 *

	 * Usually this is set to `$this->widget_options['classname']` by

	 * dynamic_sidebar(). In this case, however, we want to set the classname

	 * dynamically depending on the block contained by this block widget.

	 *

	 * If a block widget contains a block that has an equivalent legacy widget,

	 * we display that legacy widget's class name. This helps with theme

	 * backwards compatibility.

	 *

	 * @since 5.8.0

	 *

	 * @param string $content The HTML content of the current block widget.

	 * @return string The classname to use in the block widget's container HTML.

	 */

	private function get_dynamic_classname( $content ) {

		$blocks = parse_blocks( $content );

		$block_name = isset( $blocks[0] ) ? $blocks[0]['blockName'] : null;

		switch ( $block_name ) {

			case 'core/paragraph':

				$classname = 'widget_block widget_text';

				break;

			case 'core/calendar':

				$classname = 'widget_block widget_calendar';

				break;

			case 'core/search':

				$classname = 'widget_block widget_search';

				break;

			case 'core/html':

				$classname = 'widget_block widget_custom_html';

				break;

			case 'core/archives':

				$classname = 'widget_block widget_archive';

				break;

			case 'core/latest-posts':

				$classname = 'widget_block widget_recent_entries';

				break;

			case 'core/latest-comments':

				$classname = 'widget_block widget_recent_comments';

				break;

			case 'core/tag-cloud':

				$classname = 'widget_block widget_tag_cloud';

				break;

			case 'core/categories':

				$classname = 'widget_block widget_categories';

				break;

			case 'core/audio':

				$classname = 'widget_block widget_media_audio';

				break;

			case 'core/video':

				$classname = 'widget_block widget_media_video';

				break;

			case 'core/image':

				$classname = 'widget_block widget_media_image';

				break;

			case 'core/gallery':

				$classname = 'widget_block widget_media_gallery';

				break;

			case 'core/rss':

				$classname = 'widget_block widget_rss';

				break;

			default:

				$classname = 'widget_block';

		}

		/**

		 * The classname used in the block widget's container HTML.

		 *

		 * This can be set according to the name of the block contained by the block widget.

		 *

		 * @since 5.8.0

		 *

		 * @param string $classname  The classname to be used in the block widget's container HTML,

		 *                           e.g. 'widget_block widget_text'.

		 * @param string $block_name The name of the block contained by the block widget,

		 *                           e.g. 'core/paragraph'.

		 */

		return apply_filters( 'widget_block_dynamic_classname', $classname, $block_name );

	}

	/**

	 * Handles updating settings for the current Block widget instance.

	 *

	 * @since 5.8.0

	 * @param array $new_instance New settings for this instance as input by the user via

	 *                            WP_Widget::form().

	 * @param array $old_instance Old settings for this instance.

	 * @return array Settings to save or bool false to cancel saving.

	 */

	public function update( $new_instance, $old_instance ) {

		$instance = array_merge( $this->default_instance, $old_instance );

		if ( current_user_can( 'unfiltered_html' ) ) {

			$instance['content'] = $new_instance['content'];

		} else {

			$instance['content'] = wp_kses_post( $new_instance['content'] );

		}

		return $instance;

	}

	/**

	 * Outputs the Block widget settings form.

	 *

	 * @since 5.8.0

	 *

	 * @see WP_Widget_Custom_HTML::render_control_template_scripts()

	 *

	 * @param array $instance Current instance.

	 */

	public function form( $instance ) {

		$instance = wp_parse_args( (array) $instance, $this->default_instance );

		?>

		<p>

			<label for="<?php echo $this->get_field_id( 'content' ); ?>"><?php echo __( 'Block HTML:' ); ?></label>

			<textarea id="<?php echo $this->get_field_id( 'content' ); ?>" name="<?php echo $this->get_field_name( 'content' ); ?>" rows="6" cols="50" class="widefat code"><?php echo esc_textarea( $instance['content'] ); ?></textarea>

		</p>

		<?php

	}

	/**

	 * Makes sure no block widget is considered to be wide.

	 *

	 * @since 5.8.0

	 *

	 * @param bool   $is_wide   Whether the widget is considered wide.

	 * @param string $widget_id Widget ID.

	 * @return bool Updated `is_wide` value.

	 */

	public function set_is_wide_widget_in_customizer( $is_wide, $widget_id ) {

		if ( strpos( $widget_id, 'block-' ) === 0 ) {

			return false;

		}

		return $is_wide;

	}

}