SWDB/application/API/v1/API_Controller.php

<?php

    /**
     * v1 API Controller file.
     *
     * Provides a class to handle all posible API requests.
     *
     * @category Constroller
     */

    /**
     * v1 API controller.
     *
     * Handles every API request.
     *
     * @category Controller
     */
    class API_Controller {

        /**
         * Constructor.
         *
         * Handles every request, creating the required models and selecting the
         * view.
         *
         * @param string[] $query GET parameters of the request.
         */
        public function __construct($query){

            // Remove /API/
            array_shift($query);
            // Remove /v1/
            array_shift($query);
            // API call: Use API controller
            $method = $_SERVER["REQUEST_METHOD"];
            if (!in_array($method, ["GET", "POST", "PUT", "DELETE"])){
                $method = "GET";
            }
            if (count($query) == 0 || $query[0] == null || $query[0] == ""){
                require_once(__DIR__ . "/main.php");
            }
            else{
                $command = strtolower($query[0]);
                // Remove /<command>/
                array_shift($query);
                switch ($command){
                    case "help":
                        require_once(__DIR__ . "/help/index.php");
                        break;
                    case "profile":
                    case "run":
                    case "logbook":
                    case "collection":
                    case "run":
                    case "units":
                        if (file_exists(__DIR__ . "/$command/$method.php")){
                            require_once(__DIR__ . "/$command/$method.php");
                        }
                        else{
                            header("HTTP/1.1 404");
                        }
                        break;
                    default:
                        header("HTTP/1.1 404");
                }
            }
        }
    }
?>