<?php

/**

 * Fonts functions.

 *

 * @package    WordPress

 * @subpackage Fonts

 * @since      6.4.0

 */

/**

 * Generates and prints font-face styles for given fonts or theme.json fonts.

 *

 * @since 6.4.0

 *

 * @param array[][] $fonts {

 *     Optional. The font-families and their font faces. Default empty array.

 *

 *     @type array ...$0 {

 *         An indexed or associative (keyed by font-family) array of font variations for this font-family.

 *         Each font face has the following structure.

 *

 *         @type array ...$0 {

 *             The font face properties.

 *

 *             @type string          $font-family             The font-family property.

 *             @type string|string[] $src                     The URL(s) to each resource containing the font data.

 *             @type string          $font-style              Optional. The font-style property. Default 'normal'.

 *             @type string          $font-weight             Optional. The font-weight property. Default '400'.

 *             @type string          $font-display            Optional. The font-display property. Default 'fallback'.

 *             @type string          $ascent-override         Optional. The ascent-override property.

 *             @type string          $descent-override        Optional. The descent-override property.

 *             @type string          $font-stretch            Optional. The font-stretch property.

 *             @type string          $font-variant            Optional. The font-variant property.

 *             @type string          $font-feature-settings   Optional. The font-feature-settings property.

 *             @type string          $font-variation-settings Optional. The font-variation-settings property.

 *             @type string          $line-gap-override       Optional. The line-gap-override property.

 *             @type string          $size-adjust             Optional. The size-adjust property.

 *             @type string          $unicode-range           Optional. The unicode-range property.

 *         }

 *     }

 * }

 */

function wp_print_font_faces( $fonts = array() ) {

	if ( empty( $fonts ) ) {

		$fonts = WP_Font_Face_Resolver::get_fonts_from_theme_json();

	}

	if ( empty( $fonts ) ) {

		return;

	}

	$wp_font_face = new WP_Font_Face();

	$wp_font_face->generate_and_print( $fonts );

}

/**

 * Generates and prints font-face styles defined the the theme style variations.

 *

 * @since 6.7.0

 *

 */

function wp_print_font_faces_from_style_variations() {

	$fonts = WP_Font_Face_Resolver::get_fonts_from_style_variations();

	if ( empty( $fonts ) ) {

		return;

	}

	wp_print_font_faces( $fonts );

}

/**

 * Registers a new font collection in the font library.

 *

 * See {@link https://schemas.wp.org/trunk/font-collection.json} for the schema

 * the font collection data must adhere to.

 *

 * @since 6.5.0

 *

 * @param string $slug Font collection slug. May only contain alphanumeric characters, dashes,

 *                     and underscores. See sanitize_title().

 * @param array  $args {

 *     Font collection data.

 *

 *     @type string       $name          Required. Name of the font collection shown in the Font Library.

 *     @type string       $description   Optional. A short descriptive summary of the font collection. Default empty.

 *     @type array|string $font_families Required. Array of font family definitions that are in the collection,

 *                                       or a string containing the path or URL to a JSON file containing the font collection.

 *     @type array        $categories    Optional. Array of categories, each with a name and slug, that are used by the

 *                                       fonts in the collection. Default empty.

 * }

 * @return WP_Font_Collection|WP_Error A font collection if it was registered

 *                                     successfully, or WP_Error object on failure.

 */

function wp_register_font_collection( string $slug, array $args ) {

	return WP_Font_Library::get_instance()->register_font_collection( $slug, $args );

}

/**

 * Unregisters a font collection from the Font Library.

 *

 * @since 6.5.0

 *

 * @param string $slug Font collection slug.

 * @return bool True if the font collection was unregistered successfully, else false.

 */

function wp_unregister_font_collection( string $slug ) {

	return WP_Font_Library::get_instance()->unregister_font_collection( $slug );

}

/**

 * Retrieves font 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   = untrailingslashit( wp_get_font_dir()['basedir'] );

	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-6.7/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',

				),

			),

		)

	);

}