<?php

/**
 * WordPress class extended for on-the-fly addon installations.
 *
 * @package    WPForms
 * @author     WPForms
 * @since      1.0.0
 * @license    GPL-2.0+
 * @copyright  Copyright (c) 2016, WPForms LLC
 */
class WPForms_Install_Skin extends WP_Upgrader_Skin {

	/**
	 * Set the upgrader object and store it as a property in the parent class.
	 *
	 * @since 1.0.0
	 *
	 * @param object $upgrader The upgrader object (passed by reference).
	 */
	public function set_upgrader( &$upgrader ) {

		if ( is_object( $upgrader ) ) {
			$this->upgrader =& $upgrader;
		}
	}

	/**
	 * Empty out the header of its HTML content and only check to see if it has
	 * been performed or not.
	 *
	 * @since 1.0.0
	 */
	public function header() {
	}

	/**
	 * Empty out the footer of its HTML contents.
	 *
	 * @since 1.0.0
	 */
	public function footer() {
	}

	/**
	 * Instead of outputting HTML for errors, json_encode the errors and send them
	 * back to the Ajax script for processing.
	 *
	 * @since 1.0.0
	 *
	 * @param array $errors Array of errors with the install process.
	 */
	public function error( $errors ) {

		if ( ! empty( $errors ) ) {
			wp_send_json_error( $errors );
		}
	}

	/**
	 * Empty out the feedback method to prevent outputting HTML strings as the install
	 * is progressing.
	 *
	 * @since 1.0.0
	 *
	 * @param string $string The feedback string.
	 */
	public function feedback( $string ) {
	}

	/**
	 * Empty out JavaScript output that calls function to decrement the update counts.
	 *
	 * @since 1.4.9
	 *
	 * @param string $type Type of update count to decrement.
	 */
	public function decrement_update_count( $type ) {
	}
}