<?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 {

	/**

	 * Unique string identifier for the setting.

	 *

	 * @since 3.4.0

	 * @var string

	 */

	public $id = 'header_image_data';

	/**

	 * @since 3.4.0

	 *

	 * @global Custom_Image_Header $custom_image_header

	 *

	 * @param mixed $value The value to update.

	 */

	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 );

		}

	}

}