uploads directory information.
 *
 * Same as wp_font_dir() but "light weight" as it doesn't attempt to create the font uploads directory.
 * Intended for use in themes, when only 'basedir' and 'baseurl' are needed, generally in all cases
 * when not uploading files.
 *
 * @since 6.5.0
 *
 * @see wp_font_dir()
 *
 * @return array See wp_font_dir() for description.
 */
function wp_get_font_dir() {
	return wp_font_dir( false );
}

/**
 * Returns an array containing the current fonts upload directory's path and URL.
 *
 * @since 6.5.0
 *
 * @param bool $create_dir Optional. Whether to check and create the font uploads directory. Default true.
 * @return array {
 *     Array of information about the font upload directory.
 *
 *     @type string       $path    Base directory and subdirectory or full path to the fonts upload directory.
 *     @type string       $url     Base URL and subdirectory or absolute URL to the fonts upload directory.
 *     @type string       $subdir  Subdirectory
 *     @type string       $basedir Path without subdir.
 *     @type string       $baseurl URL path without subdir.
 *     @type string|false $error   False or error message.
 * }
 */
function wp_font_dir( $create_dir = true ) {
	/*
	 * Allow extenders to manipulate the font directory consistently.
	 *
	 * Ensures the upload_dir filter is fired both when calling this function
	 * directly and when the upload directory is filtered in the Font Face
	 * REST API endpoint.
	 */
	add_filter( 'upload_dir', '_wp_filter_font_directory' );
	$font_dir = wp_upload_dir( null, $create_dir, false );
	remove_filter( 'upload_dir', '_wp_filter_font_directory' );
	return $font_dir;
}

/**
 * A callback function for use in the {@see 'upload_dir'} filter.
 *
 * This function is intended for internal use only and should not be used by plugins and themes.
 * Use wp_get_font_dir() instead.
 *
 * @since 6.5.0
 * @access private
 *
 * @param string $font_dir The font directory.
 * @return string The modified font directory.
 */
function _wp_filter_font_directory( $font_dir ) {
	if ( doing_filter( 'font_dir' ) ) {
		// Avoid an infinite loop.
		return $font_dir;
	}

	$font_dir = array(
		'path'    => untrailingslashit( $font_dir['basedir'] ) . '/fonts',
		'url'     => untrailingslashit( $font_dir['baseurl'] ) . '/fonts',
		'subdir'  => '',
		'basedir' => untrailingslashit( $font_dir['basedir'] ) . '/fonts',
		'baseurl' => untrailingslashit( $font_dir['baseurl'] ) . '/fonts',
		'error'   => false,
	);

	/**
	 * Filters the fonts directory data.
	 *
	 * This filter allows developers to modify the fonts directory data.
	 *
	 * @since 6.5.0
	 *
	 * @param array $font_dir {
	 *     Array of information about the font upload directory.
	 *
	 *     @type string       $path    Base directory and subdirectory or full path to the fonts upload directory.
	 *     @type string       $url     Base URL and subdirectory or absolute URL to the fonts upload directory.
	 *     @type string       $subdir  Subdirectory
	 *     @type string       $basedir Path without subdir.
	 *     @type string       $baseurl URL path without subdir.
	 *     @type string|false $error   False or error message.
	 * }
	 */
	return apply_filters( 'font_dir', $font_dir );
}

/**
 * Deletes child font faces when a font family is deleted.
 *
 * @access private
 * @since 6.5.0
 *
 * @param int     $post_id Post ID.
 * @param WP_Post $post    Post object.
 */
function _wp_after_delete_font_family( $post_id, $post ) {
	if ( 'wp_font_family' !== $post->post_type ) {
		return;
	}

	$font_faces = get_children(
		array(
			'post_parent' => $post_id,
			'post_type'   => 'wp_font_face',
		)
	);

	foreach ( $font_faces as $font_face ) {
		wp_delete_post( $font_face->ID, true );
	}
}

/**
 * Deletes associated font files when a font face is deleted.
 *
 * @access private
 * @since 6.5.0
 *
 * @param int     $post_id Post ID.
 * @param WP_Post $post    Post object.
 */
function _wp_before_delete_font_face( $post_id, $post ) {
	if ( 'wp_font_face' !== $post->post_type ) {
		return;
	}

	$font_files = get_post_meta( $post_id, '_wp_font_face_file', false );
	$font_dir   = wp_get_font_dir()['path'];

	foreach ( $font_files as $font_file ) {
		wp_delete_file( $font_dir . '/' . $font_file );
	}
}

/**
 * Register the default font collections.
 *
 * @access private
 * @since 6.5.0
 */
function _wp_register_default_font_collections() {
	wp_register_font_collection(
		'google-fonts',
		array(
			'name'          => _x( 'Google Fonts', 'font collection name' ),
			'description'   => __( 'Install from Google Fonts. Fonts are copied to and served from your site.' ),
			'font_families' => 'https://s.w.org/images/fonts/wp-6.5/collections/google-fonts-with-preview.json',
			'categories'    => array(
				array(
					'name' => _x( 'Sans Serif', 'font category' ),
					'slug' => 'sans-serif',
				),
				array(
					'name' => _x( 'Display', 'font category' ),
					'slug' => 'display',
				),
				array(
					'name' => _x( 'Serif', 'font category' ),
					'slug' => 'serif',
				),
				array(
					'name' => _x( 'Handwriting', 'font category' ),
					'slug' => 'handwriting',
				),
				array(
					'name' => _x( 'Monospace', 'font category' ),
					'slug' => 'monospace',
				),
			),
		)
	);
}