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Edit File: HasControllerMiddlewareTrait.php

<?php
/**
 * @package   SureCartCore
 * @author    SureCart <support@surecart.com>
 * @copyright 2017-2019 SureCart
 * @license   https://www.gnu.org/licenses/gpl-2.0.html GPL-2.0
 * @link      https://surecart.com/
 */

namespace SureCartCore\Middleware;

/**
 * Allow objects to have controller middleware.
 */
trait HasControllerMiddlewareTrait {
	/**
	 * Array of middleware.
	 *
	 * @var ControllerMiddleware[]
	 */
	protected $middleware = [];

/**
	 * Get middleware.
	 *
	 * @param  string $method
	 * @return string[]
	 */
	public function getMiddleware( $method ) {
		$middleware = array_filter(
			$this->middleware,
			function ( ControllerMiddleware $middleware ) use ( $method ) {
				return $middleware->appliesTo( $method );
			}
		);

$middleware = array_map(
			function ( ControllerMiddleware $middleware ) {
				return $middleware->get();
			},
			$middleware
		);

if ( ! empty( $middleware ) ) {
			$middleware = call_user_func_array( 'array_merge', $middleware );
		}

return $middleware;
	}

/**
	 * Add middleware.
	 *
	 * @param  string|string[] $middleware
	 * @return ControllerMiddleware
	 */
	public function addMiddleware( $middleware ) {
		$controller_middleware = new ControllerMiddleware( $middleware );

$this->middleware = array_merge(
			$this->middleware,
			[ $controller_middleware ]
		);

return $controller_middleware;
	}

/**
	 * Fluent alias for addMiddleware().
	 *
	 * @codeCoverageIgnore
	 * @param  string|string[] $middleware
	 * @return ControllerMiddleware
	 */
	public function middleware( $middleware ) {
		return call_user_func_array( [ $this, 'addMiddleware' ], func_get_args() );
	}
}

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