RouterUtils.php

<?php

/**
 * Class RouterUtils
 * Tools to facilitate the use of the Router
 */
class RouterUtils{

    /**
     * @param string $url
     *      The input url, ex: /api/v1/articles/2/paragraphs/1
     * @return string
     *      url used for routing the API, ex: /articles/2/paragraphs/1
     */
    static function extractRealApiRoute(string $url): string {
        $temp = explode('/', $url);
        array_shift($temp);
        array_shift($temp);
        array_shift($temp);
        return '/' . implode('/', $temp);
    }

    const URL_PARAMS = 'URL_PARAMS';
    const BODY_DATA = "BODY_DATA";

    /**
     * Get the body data of the incoming request
     * @return array
     *      Associative array corresponding to the json in the body of the request
     */
    static function getBodyData(): array {
        $data = json_decode(file_get_contents('php://input'), true);
        return !is_null($data)? $data:array();
    }

    /**
     * Test to check if the router found a valid route
     * @param array $result
     *      The array return by the getMatch() method
     *      [callable, $params]
     * @return bool
     */
    static function isRouteFound(array $result): bool {
        if (empty($result)) {
            return false;
        } else {
            return true;
        }
    }

    /**
     * Execute the callback corresponding to the route
     * @param array $result
     *      [callable, $params]
     * @param array $data
     *      Associative array containing parameters (URL_PARAMS) of the url and json of the body (BODY_DATA)
     */
    static function executeRoute(array $result, array $data) {
        $args = array(self::URL_PARAMS => $result[1], self::BODY_DATA => $data);
        call_user_func($result[0], $args);
    }

    /**
     * Send the response to the client
     * @param string $json
     *      THe message to send
     */
    static function response(string $json){
        header('Content-Type: application/json');
        echo $json;
    }
}