<?php

/**

 * Upgrader API: WP_Ajax_Upgrader_Skin class

 *

 * @package WordPress

 * @subpackage Upgrader

 * @since 4.6.0

 */

/**

 * Upgrader Skin for Ajax WordPress upgrades.

 *

 * This skin is designed to be used for Ajax updates.

 *

 * @since 4.6.0

 *

 * @see Automatic_Upgrader_Skin

 */

class WP_Ajax_Upgrader_Skin extends Automatic_Upgrader_Skin {

	/**

	 * Holds the WP_Error object.

	 *

	 * @since 4.6.0

	 * @var null|WP_Error

	 */

	protected $errors = null;

	/**

	 * Constructor.

	 *

	 * @since 4.6.0

	 *

	 * @param array $args Options for the upgrader, see WP_Upgrader_Skin::__construct().

	 */

	public function __construct( $args = array() ) {

		parent::__construct( $args );

		$this->errors = new WP_Error();

	}

	/**

	 * Retrieves the list of errors.

	 *

	 * @since 4.6.0

	 *

	 * @return WP_Error Errors during an upgrade.

	 */

	public function get_errors() {

		return $this->errors;

	}

	/**

	 * Retrieves a string for error messages.

	 *

	 * @since 4.6.0

	 *

	 * @return string Error messages during an upgrade.

	 */

	public function get_error_messages() {

		$messages = array();

		foreach ( $this->errors->get_error_codes() as $error_code ) {

			if ( $this->errors->get_error_data( $error_code ) && is_string( $this->errors->get_error_data( $error_code ) ) ) {

				$messages[] = $this->errors->get_error_message( $error_code ) . ' ' . esc_html( strip_tags( $this->errors->get_error_data( $error_code ) ) );

			} else {

				$messages[] = $this->errors->get_error_message( $error_code );

			}

		}

		return implode( ', ', $messages );

	}

	/**

	 * Stores a log entry for an error.

	 *

	 * @since 4.6.0

	 *

	 * @param string|WP_Error $errors Errors.

	 */

	public function error( $errors ) {

		if ( is_string( $errors ) ) {

			$string = $errors;

			if ( ! empty( $this->upgrader->strings[ $string ] ) ) {

				$string = $this->upgrader->strings[ $string ];

			}

			if ( false !== strpos( $string, '%' ) ) {

				$args = func_get_args();

				$args = array_splice( $args, 1 );

				if ( ! empty( $args ) ) {

					$string = vsprintf( $string, $args );

				}

			}

			// Count existing errors to generate an unique error code.

			$errors_count = count( $this->errors->get_error_codes() );

			$this->errors->add( 'unknown_upgrade_error_' . $errors_count + 1 , $string );

		} elseif ( is_wp_error( $errors ) ) {

			foreach ( $errors->get_error_codes() as $error_code ) {

				$this->errors->add( $error_code, $errors->get_error_message( $error_code ), $errors->get_error_data( $error_code ) );

			}

		}

		$args = func_get_args();

		call_user_func_array( array( $this, 'parent::error' ), $args );

	}

	/**

	 * Stores a log entry.

	 *

	 * @since 4.6.0

	 *

	 * @param string|array|WP_Error $data Log entry data.

	 */

	public function feedback( $data ) {

		if ( is_wp_error( $data ) ) {

			foreach ( $data->get_error_codes() as $error_code ) {

				$this->errors->add( $error_code, $data->get_error_message( $error_code ), $data->get_error_data( $error_code ) );

			}

		}

		$args = func_get_args();

		call_user_func_array( array( $this, 'parent::feedback' ), $args );

	}

}