<?php

/**

 * Server-side rendering of the `core/site-logo` block.

 *

 * @package WordPress

 */

/**

 * Renders the `core/site-logo` block on the server.

 *

 * @param array $attributes The block attributes.

 *

 * @return string The render.

 */

function render_block_core_site_logo( $attributes ) {

	$adjust_width_height_filter = function ( $image ) use ( $attributes ) {

		if ( empty( $attributes['width'] ) || empty( $image ) ) {

			return $image;

		}

		$height = (float) $attributes['width'] / ( (float) $image[1] / (float) $image[2] );

		return array( $image[0], (int) $attributes['width'], (int) $height );

	};

	add_filter( 'wp_get_attachment_image_src', $adjust_width_height_filter );

	$custom_logo = get_custom_logo();

	remove_filter( 'wp_get_attachment_image_src', $adjust_width_height_filter );

	if ( empty( $custom_logo ) ) {

		return ''; // Return early if no custom logo is set, avoiding extraneous wrapper div.

	}

	if ( ! $attributes['isLink'] ) {

		// Remove the link.

		$custom_logo = preg_replace( '#<a.*?>(.*?)</a>#i', '\1', $custom_logo );

	}

	if ( $attributes['isLink'] && '_blank' === $attributes['linkTarget'] ) {

		// Add the link target after the rel="home".

		// Add an aria-label for informing that the page opens in a new tab.

		$aria_label  = 'aria-label="' . esc_attr__( '(Home link, opens in a new tab)' ) . '"';

		$custom_logo = str_replace( 'rel="home"', 'rel="home" target="' . $attributes['linkTarget'] . '"' . $aria_label, $custom_logo );

	}

	$classnames = array();

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

		$classnames[] = $attributes['className'];

	}

	if ( ! empty( $attributes['align'] ) && in_array( $attributes['align'], array( 'center', 'left', 'right' ), true ) ) {

		$classnames[] = "align{$attributes['align']}";

	}

	if ( empty( $attributes['width'] ) ) {

		$classnames[] = 'is-default-size';

	}

	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classnames ) ) );

	$html               = sprintf( '<div %s>%s</div>', $wrapper_attributes, $custom_logo );

	return $html;

}

/**

 * Register a core site setting for a site logo

 */

function register_block_core_site_logo_setting() {

	register_setting(

		'general',

		'site_logo',

		array(

			'show_in_rest' => array(

				'name' => 'site_logo',

			),

			'type'         => 'integer',

			'description'  => __( 'Site logo.' ),

		)

	);

}

add_action( 'rest_api_init', 'register_block_core_site_logo_setting', 10 );

/**

 * Registers the `core/site-logo` block on the server.

 */

function register_block_core_site_logo() {

	register_block_type_from_metadata(

		__DIR__ . '/site-logo',

		array(

			'render_callback' => 'render_block_core_site_logo',

		)

	);

}

add_action( 'init', 'register_block_core_site_logo' );

/**

 * Overrides the custom logo with a site logo, if the option is set.

 *

 * @param string $custom_logo The custom logo set by a theme.

 *

 * @return string The site logo if set.

 */

function _override_custom_logo_theme_mod( $custom_logo ) {

	$site_logo = get_option( 'site_logo' );

	return false === $site_logo ? $custom_logo : $site_logo;

}

add_filter( 'theme_mod_custom_logo', '_override_custom_logo_theme_mod' );

/**

 * Updates the site_logo option when the custom_logo theme-mod gets updated.

 *

 * @param  mixed $value Attachment ID of the custom logo or an empty value.

 * @return mixed

 */

function _sync_custom_logo_to_site_logo( $value ) {

	if ( empty( $value ) ) {

		delete_option( 'site_logo' );

	} else {

		update_option( 'site_logo', $value );

	}

	return $value;

}

add_filter( 'pre_set_theme_mod_custom_logo', '_sync_custom_logo_to_site_logo' );

/**

 * Deletes the site_logo when the custom_logo theme mod is removed.

 *

 * @param array $old_value Previous theme mod settings.

 * @param array $value     Updated theme mod settings.

 */

function _delete_site_logo_on_remove_custom_logo( $old_value, $value ) {

	// If the custom_logo is being unset, it's being removed from theme mods.

	if ( isset( $old_value['custom_logo'] ) && ! isset( $value['custom_logo'] ) ) {

		delete_option( 'site_logo' );

	}

}

/**

 * Deletes the site logo when all theme mods are being removed.

 */

function _delete_site_logo_on_remove_theme_mods() {

	if ( false !== get_theme_support( 'custom-logo' ) ) {

		delete_option( 'site_logo' );

	}

}

/**

 * Hooks `_delete_site_logo_on_remove_custom_logo` in `update_option_theme_mods_$theme`.

 * Hooks `_delete_site_logo_on_remove_theme_mods` in `delete_option_theme_mods_$theme`.

 *

 * Runs on `setup_theme` to account for dynamically-switched themes in the Customizer.

 */

function _delete_site_logo_on_remove_custom_logo_on_setup_theme() {

	$theme = get_option( 'stylesheet' );

	add_action( "update_option_theme_mods_$theme", '_delete_site_logo_on_remove_custom_logo', 10, 2 );

	add_action( "delete_option_theme_mods_$theme", '_delete_site_logo_on_remove_theme_mods' );

}

add_action( 'setup_theme', '_delete_site_logo_on_remove_custom_logo_on_setup_theme', 11 );