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<?php
/**
 * Customize API: WP_Customize_Header_Image_Setting class
 *
 * @package WordPress
 * @subpackage Customize
 * @since 4.4.0
 */

/**
 * A setting that is used to filter a value, but will not save the results.
 *
 * Results should be properly handled using another setting or callback.
 *
 * @since 3.4.0
 *
 * @see WP_Customize_Setting
 */
final class WP_Customize_Header_Image_Setting extends WP_Customize_Setting {
    public $id = 'header_image_data';

    /**
     * @since 3.4.0
     *
     * @global Custom_Image_Header $custom_image_header
     *
     * @param $value
     */
    public function update( $value ) {
        global $custom_image_header;

        // If _custom_header_background_just_in_time() fails to initialize $custom_image_header when not is_admin().
        if ( empty( $custom_image_header ) ) {
            require_once ABSPATH . 'wp-admin/includes/class-custom-image-header.php';
            $args                   = get_theme_support( 'custom-header' );
            $admin_head_callback    = isset( $args[0]['admin-head-callback'] ) ? $args[0]['admin-head-callback'] : null;
            $admin_preview_callback = isset( $args[0]['admin-preview-callback'] ) ? $args[0]['admin-preview-callback'] : null;
            $custom_image_header    = new Custom_Image_Header( $admin_head_callback, $admin_preview_callback );
        }

        // If the value doesn't exist (removed or random),
        // use the header_image value.
        if ( ! $value ) {
            $value = $this->manager->get_setting( 'header_image' )->post_value();
        }

        if ( is_array( $value ) && isset( $value['choice'] ) ) {
            $custom_image_header->set_header_image( $value['choice'] );
        } else {
            $custom_image_header->set_header_image( $value );
        }
    }
}