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Filename : skin.php
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<?php
/**
 * Skin class.
 *
 * @since 6.0.0
 *
 * @package UserFeedback
 * @subpackage  Upgrader Skin
 * @author  Chris Christoff
 */

// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class UserFeedback_Skin extends WP_Upgrader_Skin {

	/**
	 * Primary class constructor.
	 *
	 * @since 6.0.0
	 *
	 * @param array $args Empty array of args (we will use defaults).
	 */
	public function __construct( $args = array() ) {

		parent::__construct();

	}

	/**
	 * Set the upgrader object and store it as a property in the parent class.
	 *
	 * @since 6.0.0
	 *
	 * @param object $upgrader The upgrader object (passed by reference).
	 */
	public function set_upgrader( &$upgrader ) {

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

	}

	/**
	 * Set the upgrader result and store it as a property in the parent class.
	 *
	 * @since 6.0.0
	 *
	 * @param object $result The result of the install process.
	 */
	public function set_result( $result ) {

		$this->result = $result;

	}

	/**
	 * Empty out the header of its HTML content and only check to see if it has
	 * been performed or not.
	 *
	 * @since 6.0.0
	 */
	public function header() {}

	/**
	 * Empty out the footer of its HTML contents.
	 *
	 * @since 6.0.0
	 */
	function footer() {}

	/**
	 * Instead of outputting HTML for errors, json_encode the errors and send them
	 * back to the Ajax script for processing.
	 *
	 * @since 6.0.0
	 *
	 * @param array $errors Array of errors with the install process.
	 */
	function error( $errors ) {

		if ( ! empty( $errors ) ) {
			$error_message = esc_html__( 'There was an error installing the addon. Please try again.', 'userfeedback' );
			if ( is_wp_error( $errors ) ) {
				/**
				 * @var WP_Error $errors
				 */
				$message = $errors->get_error_message();

				if ( ! empty( $message ) ) {
					// Translators: The name of the addon that can't be installed.
					$error_message = sprintf( esc_html__( 'There was an error installing the addon: %s', 'userfeedback' ), esc_html( $message ) );
				}
			}

			wp_send_json_error( array( 'error' => $error_message ) );
		}

	}

	/**
	 * Empty out the feedback method to prevent outputting HTML strings as the install
	 * is progressing.
	 *
	 * @since 6.0.0
	 *
	 * @param string $string The feedback string.
	 */
	function feedback( $string, ...$args ) {

	}

}