<?php
/**
 * Block and style registration functions.
 *
 * @package gutenberg
 */

/**
 * Substitutes the implementation of a core-registered block type, if exists,
 * with the built result from the plugin.
 */
function gutenberg_reregister_core_block_types() {
	// Blocks directory may not exist if working from a fresh clone.
	$blocks_dir = dirname( __FILE__ ) . '/../build/block-library/blocks/';
	if ( ! file_exists( $blocks_dir ) ) {
		return;
	}

	$block_folders = array(
		'audio',
		'button',
		'buttons',
		'classic',
		'code',
		'column',
		'columns',
		'file',
		'gallery',
		'group',
		'heading',
		'html',
		'image',
		'list',
		'media-text',
		'missing',
		'more',
		'navigation-link',
		'nextpage',
		'paragraph',
		'preformatted',
		'pullquote',
		'quote',
		'separator',
		'social-links',
		'spacer',
		'subhead',
		'table',
		'text-columns',
		'verse',
		'video',
		'widget-area',
	);

	$block_names = array(
		'archives.php'        => 'core/archives',
		'block.php'           => 'core/block',
		'calendar.php'        => 'core/calendar',
		'categories.php'      => 'core/categories',
		'cover.php'           => 'core/cover',
		'latest-comments.php' => 'core/latest-comments',
		'latest-posts.php'    => 'core/latest-posts',
		'legacy-widget.php'   => 'core/legacy-widget',
		'navigation.php'      => 'core/navigation',
		'navigation-link.php' => 'core/navigation-link',
		'rss.php'             => 'core/rss',
		'search.php'          => 'core/search',
		'shortcode.php'       => 'core/shortcode',
		'social-link.php'     => 'core/social-link',
		'tag-cloud.php'       => 'core/tag-cloud',
	);

	if ( gutenberg_is_experiment_enabled( 'gutenberg-full-site-editing' ) ) {
		$block_names = array_merge(
			$block_names,
			array(
				'post-author.php'         => 'core/post-author',
				'post-comments.php'       => 'core/post-comments',
				'post-comments-count.php' => 'core/post-comments-count',
				'post-comments-form.php'  => 'core/post-comments-form',
				'post-content.php'        => 'core/post-content',
				'post-date.php'           => 'core/post-date',
				'post-excerpt.php'        => 'core/post-excerpt',
				'post-featured-image.php' => 'core/post-featured-image',
				'post-tags.php'           => 'core/post-tags',
				'post-title.php'          => 'core/post-title',
				'query.php'               => 'core/query',
				'query-loop.php'          => 'core/query-loop',
				'query-pagination.php'    => 'core/query-pagination',
				'site-logo.php'           => 'core/site-logo',
				'site-tagline.php'        => 'core/site-tagline',
				'site-title.php'          => 'core/site-title',
				'template-part.php'       => 'core/template-part',
			)
		);
	}

	$registry = WP_Block_Type_Registry::get_instance();

	foreach ( $block_folders as $folder_name ) {
		$block_json_file = $blocks_dir . '/' . $folder_name . '/block.json';
		if ( ! file_exists( $block_json_file ) ) {
			return;
		}

		// Ideally, all paths to block metadata files should be listed in
		// WordPress core. In this place we should rather use filter
		// to replace paths with overrides defined by the plugin.
		$metadata = json_decode( file_get_contents( $block_json_file ), true );
		if ( ! is_array( $metadata ) || ! $metadata['name'] ) {
			return false;
		}

		if ( $registry->is_registered( $metadata['name'] ) ) {
			$registry->unregister( $metadata['name'] );
		}

		register_block_type_from_metadata( $block_json_file );
	}

	foreach ( $block_names as $file => $block_names ) {
		if ( ! file_exists( $blocks_dir . $file ) ) {
			return;
		}

		if ( is_string( $block_names ) ) {
			if ( $registry->is_registered( $block_names ) ) {
				$registry->unregister( $block_names );
			}
		} elseif ( is_array( $block_names ) ) {
			foreach ( $block_names as $block_name ) {
				if ( $registry->is_registered( $block_name ) ) {
					$registry->unregister( $block_name );
				}
			}
		}

		require $blocks_dir . $file;
	}
}
add_action( 'init', 'gutenberg_reregister_core_block_types' );

/**
 * Complements the implementation of block type `core/social-icon`, whether it
 * be provided by core or the plugin, with derived block types for each
 * "service" (WordPress, Twitter, etc.) supported by Social Links.
 *
 * This ensures backwards compatibility for any users running the Gutenberg
 * plugin who have used Social Links prior to their conversion to block
 * variations.
 *
 * This shim is INTENTIONALLY left out of core, as Social Links haven't yet
 * landed there.
 *
 * @see https://github.com/WordPress/gutenberg/pull/19887
 */
function gutenberg_register_legacy_social_link_blocks() {
	$services = array(
		'amazon',
		'bandcamp',
		'behance',
		'chain',
		'codepen',
		'deviantart',
		'dribbble',
		'dropbox',
		'etsy',
		'facebook',
		'feed',
		'fivehundredpx',
		'flickr',
		'foursquare',
		'goodreads',
		'google',
		'github',
		'instagram',
		'lastfm',
		'linkedin',
		'mail',
		'mastodon',
		'meetup',
		'medium',
		'pinterest',
		'pocket',
		'reddit',
		'skype',
		'snapchat',
		'soundcloud',
		'spotify',
		'tumblr',
		'twitch',
		'twitter',
		'vimeo',
		'vk',
		'wordpress',
		'yelp',
		'youtube',
	);

	foreach ( $services as $service ) {
		register_block_type(
			'core/social-link-' . $service,
			array(
				'category'        => 'widgets',
				'attributes'      => array(
					'url'     => array(
						'type' => 'string',
					),
					'service' => array(
						'type'    => 'string',
						'default' => $service,
					),
					'label'   => array(
						'type' => 'string',
					),
				),
				'render_callback' => 'gutenberg_render_block_core_social_link',
			)
		);
	}
}
add_action( 'init', 'gutenberg_register_legacy_social_link_blocks' );