<?php

/**

 * Server-side rendering of the `core/widget-group` block.

 *

 * @package WordPress

 */

/**

 * Renders the 'core/widget-group' block.

 *

 * @param array    $attributes The block attributes.

 * @param string   $content The block content.

 * @param WP_Block $block The block.

 *

 * @return string Rendered block.

 */

function render_block_core_widget_group( $attributes, $content, $block ) {

	global $wp_registered_sidebars, $_sidebar_being_rendered;

	if ( isset( $wp_registered_sidebars[ $_sidebar_being_rendered ] ) ) {

		$before_title = $wp_registered_sidebars[ $_sidebar_being_rendered ]['before_title'];

		$after_title  = $wp_registered_sidebars[ $_sidebar_being_rendered ]['after_title'];

	} else {

		$before_title = '<h2 class="widget-title">';

		$after_title  = '</h2>';

	}

	$html = '';

	if ( ! empty( $attributes['title'] ) ) {

		$html .= $before_title . $attributes['title'] . $after_title;

	}

	$html .= '<div class="wp-widget-group__inner-blocks">';

	foreach ( $block->inner_blocks as $inner_block ) {

		$html .= $inner_block->render();

	}

	$html .= '</div>';

	return $html;

}

/**

 * Registers the 'core/widget-group' block.

 */

function register_block_core_widget_group() {

	register_block_type_from_metadata(

		__DIR__ . '/widget-group',

		array(

			'render_callback' => 'render_block_core_widget_group',

		)

	);

}

add_action( 'init', 'register_block_core_widget_group' );

/**

 * Make a note of the sidebar being rendered before WordPress starts rendering

 * it. This lets us get to the current sidebar in

 * render_block_core_widget_group().

 *

 * @param int|string $index       Index, name, or ID of the dynamic sidebar.

 */

function note_sidebar_being_rendered( $index ) {

	global $_sidebar_being_rendered;

	$_sidebar_being_rendered = $index;

}

add_action( 'dynamic_sidebar_before', 'note_sidebar_being_rendered' );

/**

 * Clear whatever we set in note_sidebar_being_rendered() after WordPress

 * finishes rendering a sidebar.

 */

function discard_sidebar_being_rendered() {

	global $_sidebar_being_rendered;

	unset( $_sidebar_being_rendered );

}

add_action( 'dynamic_sidebar_after', 'discard_sidebar_being_rendered' );