<?php

/**

 * Sets a custom slug when creating auto-draft template parts.

 *

 * This is only needed for auto-drafts created by the regular WP editor.

 * If this page is to be removed, this will not be necessary.

 *

 * @since 5.9.0

 *

 * @param int $post_id Post ID.

 */

function wp_set_unique_slug_on_create_template_part( $post_id ) {

	$post = get_post( $post_id );

	if ( 'auto-draft' !== $post->post_status ) {

		return;

	}

	if ( ! $post->post_name ) {

		wp_update_post(

			array(

				'ID'        => $post_id,

				'post_name' => 'custom_slug_' . uniqid(),

			)

		);

	}

	$terms = get_the_terms( $post_id, 'wp_theme' );

	if ( ! is_array( $terms ) || ! count( $terms ) ) {

		wp_set_post_terms( $post_id, get_stylesheet(), 'wp_theme' );

	}

}

/**

 * Generates a unique slug for templates.

 *

 * @access private

 * @since 5.8.0

 *

 * @param string $override_slug The filtered value of the slug (starts as `null` from apply_filter).

 * @param string $slug          The original/un-filtered slug (post_name).

 * @param int    $post_id       Post ID.

 * @param string $post_status   No uniqueness checks are made if the post is still draft or pending.

 * @param string $post_type     Post type.

 * @return string The original, desired slug.

 */

function wp_filter_wp_template_unique_post_slug( $override_slug, $slug, $post_id, $post_status, $post_type ) {

	if ( 'wp_template' !== $post_type && 'wp_template_part' !== $post_type ) {

		return $override_slug;

	}

	if ( ! $override_slug ) {

		$override_slug = $slug;

	}

	/*

	 * Template slugs must be unique within the same theme.

	 * TODO - Figure out how to update this to work for a multi-theme environment.

	 * Unfortunately using `get_the_terms()` for the 'wp-theme' term does not work

	 * in the case of new entities since is too early in the process to have been saved

	 * to the entity. So for now we use the currently activated theme for creation.

	 */

	$theme = get_stylesheet();

	$terms = get_the_terms( $post_id, 'wp_theme' );

	if ( $terms && ! is_wp_error( $terms ) ) {

		$theme = $terms[0]->name;

	}

	$check_query_args = array(

		'post_name__in'  => array( $override_slug ),

		'post_type'      => $post_type,

		'posts_per_page' => 1,

		'no_found_rows'  => true,

		'post__not_in'   => array( $post_id ),

		'tax_query'      => array(

			array(

				'taxonomy' => 'wp_theme',

				'field'    => 'name',

				'terms'    => $theme,

			),

		),

	);

	$check_query      = new WP_Query( $check_query_args );

	$posts            = $check_query->posts;

	if ( count( $posts ) > 0 ) {

		$suffix = 2;

		do {

			$query_args                  = $check_query_args;

			$alt_post_name               = _truncate_post_slug( $override_slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";

			$query_args['post_name__in'] = array( $alt_post_name );

			$query                       = new WP_Query( $query_args );

			++$suffix;

		} while ( count( $query->posts ) > 0 );

		$override_slug = $alt_post_name;

	}

	return $override_slug;

}

/**

 * Enqueues the skip-link script & styles.

 *

 * @access private

 * @since 6.4.0

 *

 * @global string $_wp_current_template_content

 */

function wp_enqueue_block_template_skip_link() {

	global $_wp_current_template_content;

	// Back-compat for plugins that disable functionality by unhooking this action.

	if ( ! has_action( 'wp_footer', 'the_block_template_skip_link' ) ) {

		return;

	}

	remove_action( 'wp_footer', 'the_block_template_skip_link' );

	// Early exit if not a block theme.

	if ( ! current_theme_supports( 'block-templates' ) ) {

		return;

	}

	// Early exit if not a block template.

	if ( ! $_wp_current_template_content ) {

		return;

	}

	$skip_link_styles = '

		.skip-link.screen-reader-text {

			border: 0;

			clip-path: inset(50%);

			height: 1px;

			margin: -1px;

			overflow: hidden;

			padding: 0;

			position: absolute !important;

			width: 1px;

			word-wrap: normal !important;

		}

		.skip-link.screen-reader-text:focus {

			background-color: #eee;

			clip-path: none;

			color: #444;

			display: block;

			font-size: 1em;

			height: auto;

			left: 5px;

			line-height: normal;

			padding: 15px 23px 14px;

			text-decoration: none;

			top: 5px;

			width: auto;

			z-index: 100000;

		}';

	$handle = 'wp-block-template-skip-link';

	/**

	 * Print the skip-link styles.

	 */

	wp_register_style( $handle, false );

	wp_add_inline_style( $handle, $skip_link_styles );

	wp_enqueue_style( $handle );

	/**

	 * Enqueue the skip-link script.

	 */

	ob_start();

	?>

	<script>

	( function() {

		var skipLinkTarget = document.querySelector( 'main' ),

			sibling,

			skipLinkTargetID,

			skipLink;

		// Early exit if a skip-link target can't be located.

		if ( ! skipLinkTarget ) {

			return;

		}

		/*

		 * Get the site wrapper.

		 * The skip-link will be injected in the beginning of it.

		 */

		sibling = document.querySelector( '.wp-site-blocks' );

		// Early exit if the root element was not found.

		if ( ! sibling ) {

			return;

		}

		// Get the skip-link target's ID, and generate one if it doesn't exist.

		skipLinkTargetID = skipLinkTarget.id;

		if ( ! skipLinkTargetID ) {

			skipLinkTargetID = 'wp--skip-link--target';

			skipLinkTarget.id = skipLinkTargetID;

		}

		// Create the skip link.

		skipLink = document.createElement( 'a' );

		skipLink.classList.add( 'skip-link', 'screen-reader-text' );

		skipLink.id = 'wp-skip-link';

		skipLink.href = '#' + skipLinkTargetID;

		skipLink.innerText = '<?php /* translators: Hidden accessibility text. Do not use HTML entities (&nbsp;, etc.). */ esc_html_e( 'Skip to content' ); ?>';

		// Inject the skip link.

		sibling.parentElement.insertBefore( skipLink, sibling );

	}() );

	</script>

	<?php

	$skip_link_script = wp_remove_surrounding_empty_script_tags( ob_get_clean() );

	$script_handle    = 'wp-block-template-skip-link';

	wp_register_script( $script_handle, false, array(), false, array( 'in_footer' => true ) );

	wp_add_inline_script( $script_handle, $skip_link_script );

	wp_enqueue_script( $script_handle );

}

/**

 * Enables the block templates (editor mode) for themes with theme.json by default.

 *

 * @access private

 * @since 5.8.0

 */

function wp_enable_block_templates() {

	if ( wp_is_block_theme() || wp_theme_has_theme_json() ) {

		add_theme_support( 'block-templates' );

	}

}