<?php
/**
* Server-side rendering of the `core/site-logo` block.
*
* @package WordPress
*/

/**
* Renders the `core/site-logo` block on the server.
*
* @since 5.8.0
*
* @param array $attributes The block attributes.
*
* @return string The render.
*/
function render_block_core_site_logo( $attributes ) {
$adjust_width_height_filter = static function ( $image ) use ( $attributes ) {
if ( empty( $attributes['width'] ) || empty( $image ) || ! $image[1] || ! $image[2] ) {
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.
$processor = new WP_HTML_Tag_Processor( $custom_logo );
$processor->next_tag( 'a' );
if ( 'home' === $processor->get_attribute( 'rel' ) ) {
$processor->set_attribute( 'aria-label', __( '(Home link, opens in a new tab)' ) );
$processor->set_attribute( 'target', $attributes['linkTarget'] );
}
$custom_logo = $processor->get_updated_html();
}

$classnames = array();
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
*
* @since 5.8.0
*/
function register_block_core_site_logo_setting() {
register_setting(
'general',
'site_logo',
array(
'show_in_rest' => array(
'name' => 'site_logo',
),
'type' => 'integer',
'label' => __( 'Logo' ),
'description' => __( 'Site logo.' ),
)
);
}

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

/**
* Register a core site setting for a site icon
*
* @since 5.9.0
*/
function register_block_core_site_icon_setting() {
register_setting(
'general',
'site_icon',
array(
'show_in_rest' => true,
'type' => 'integer',
'label' => __( 'Icon' ),
'description' => __( 'Site icon.' ),
)
);
}

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

/**
* Registers the `core/site-logo` block on the server.
*
* @since 5.8.0
*/
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.
*
* @since 5.8.0
*
* @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.
*
* @since 5.8.0
*
* @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.
*
* @since 5.8.0
*
* @global array $_ignore_site_logo_changes
*
* @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 ) {
global $_ignore_site_logo_changes;

if ( $_ignore_site_logo_changes ) {
return;
}

// 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.
*
* @since 5.8.0
*
* @global array $_ignore_site_logo_changes
*/
function _delete_site_logo_on_remove_theme_mods() {
global $_ignore_site_logo_changes;

if ( $_ignore_site_logo_changes ) {
return;
}

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.
*
* @since 5.8.0
*/
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 );

/**
* Removes the custom_logo theme-mod when the site_logo option gets deleted.
*
* @since 5.9.0
*
* @global array $_ignore_site_logo_changes
*/
function _delete_custom_logo_on_remove_site_logo() {
global $_ignore_site_logo_changes;

// Prevent _delete_site_logo_on_remove_custom_logo and
// _delete_site_logo_on_remove_theme_mods from firing and causing an
// infinite loop.
$_ignore_site_logo_changes = true;

// Remove the custom logo.
remove_theme_mod( 'custom_logo' );

$_ignore_site_logo_changes = false;
}
add_action( 'delete_option_site_logo', '_delete_custom_logo_on_remove_site_logo' );