KadokWeb\Router\Dispatch

Complexity

Total Complexity

35

Size/Duplication

Total Lines	252
Duplicated Lines	0 %

Importance

Changes

0

13 Methods

Rating	Name	Duplication	Size	Complexity
A	handler()	0	3	2
A	dispatch()	0	15	5
A	namespace()	0	4	2
A	group()	0	4	2
A	redirect()	0	3	1
A	__debugInfo()	0	3	1
A	action()	0	3	2
A	route()	0	28	5
A	error()	0	3	1
A	formSpoofing()	0	29	6
A	data()	0	3	1
A	addRoute()	0	31	5
A	__construct()	0	6	2

<?php

namespace KadokWeb\Router;


/**
 * Class KadokWeb Dispatch
 * @author Doka B. Silva <https://github.com/kadokweb>
 * @package KadokWeb\Router
 */
abstract class Dispatch
{
    /** @var bool|string */
    protected $projectUrl;

    /** @var string */
    protected $patch;

    /** @var string */
    protected $separator;

    /** @var string */
    protected $httpMethod;

    /** @var array */
    protected $routes;

    /** @var null|string */
    protected $group;

    /** @var null|array */
    protected $route;

    /** @var null|string */
    protected $namespace;

    /** @var null|array */
    protected $data;

    /** @var int */
    protected $error;

    /** @const int Bad Request */
    public const BAD_REQUEST = 400;

    /** @const int Not Found */
    public const NOT_FOUND = 404;

    /** @const int Method Not Allowed */
    public const METHOD_NOT_ALLOWED = 405;

    /** @const int Not Implemented */
    public const NOT_IMPLEMENTED = 501;

    /**
     * Dispatch constructor.
     * @param string $projectUrl
     * @param string|null $separator
     */
    public function __construct(string $projectUrl, ?string $separator = ":")
    {
        $this->projectUrl = (substr($projectUrl, "-1") == "/" ? substr($projectUrl, 0, -1) : $projectUrl);
        $this->patch = (filter_input(INPUT_GET, "route", FILTER_DEFAULT) ?? "/");
        $this->separator = ($separator ?? ":");
        $this->httpMethod = $_SERVER['REQUEST_METHOD'];
    }

    /**
     * @return array
     */
    public function __debugInfo()
    {
        return $this->routes;
    }

    /**
     * @param null|string $group
     * @return Dispatch
     */
    public function group(?string $group): Dispatch
    {
        $this->group = ($group ? str_replace("/", "", $group) : null);
        return $this;
    }

    /**
     * @param null|string $namespace
     * @return Dispatch
     */
    public function namespace(?string $namespace): Dispatch
    {
        $this->namespace = ($namespace ? ucwords($namespace) : null);
        return $this;
    }

    /**
     * @return null|array
     */
    public function data(): ?array
    {
        return $this->data;
    }

    /**
     * @return null|int
     */
    public function error(): ?int
    {
        return $this->error;
    }

    /**
     * @param string $route
     */
    public function redirect(string $route): void
    {
        header("Location: {$this->projectUrl}{$route}");
    }

    /**
     * @return bool
     */
    public function dispatch(): bool
    {
        if (empty($this->routes) || empty($this->routes[$this->httpMethod])) {
            $this->error = self::NOT_IMPLEMENTED;
            return false;
        }

        $this->route = null;
        foreach ($this->routes[$this->httpMethod] as $key => $route) {
            if (preg_match("~^" . $key . "$~", $this->patch, $found)) {
                $this->route = $route;
            }
        }

        return $this->route();
    }

    /**
     * @return bool
     */
    private function route()
    {
        if ($this->route) {
            if (is_callable($this->route['handler'])) {
                call_user_func($this->route['handler'], ($this->route['data'] ?? []));
                return true;
            }

            $controller = $this->route['handler'];
            $method = $this->route['action'];

            if (class_exists($controller)) {
                $newController = new $controller;
                if (method_exists($controller, $method)) {
                    $newController->$method(($this->route['data'] ?? []));
                    return true;
                }

                $this->error = self::METHOD_NOT_ALLOWED;
                return false;
            }

            $this->error = self::BAD_REQUEST;
            return false;
        }

        $this->error = self::NOT_FOUND;
        return false;
    }

    /**
     * @param string $method
     * @param string $route
     * @param string|callable $handler
     * @return Dispatch
     */
    protected function addRoute(string $method, string $route, $handler): Dispatch
    {
        if ($route == "/") {
            $this->addRoute($method, "", $handler);
        }

        preg_match_all("~\{\s* ([a-zA-Z_][a-zA-Z0-9_-]*) \}~x", $route, $keys, PREG_SET_ORDER);
        $routeDiff = array_values(array_diff(explode("/", $this->patch), explode("/", $route)));

        $this->formSpoofing();
        $offset = ($this->group ? 1 : 0);
        foreach ($keys as $key) {
            $this->data[$key[1]] = ($routeDiff[$offset++] ?? null);
        }

        $route = (!$this->group ? $route : "/{$this->group}{$route}");
        $data = $this->data;
        $namespace = $this->namespace;
        $router = function () use ($method, $handler, $data, $route, $namespace) {
            return [
                "route" => $route,
                "method" => $method,
                "handler" => $this->handler($handler, $namespace),
                "action" => $this->action($handler),
                "data" => $data
            ];
        };

        $route = preg_replace('~{([^}]*)}~', "([^/]+)", $route);
        $this->routes[$method][$route] = $router();
        return $this;
    }

    /**
     * httpMethod form spoofing
     */
    protected function formSpoofing(): void
    {
        $post = filter_input_array(INPUT_POST, FILTER_DEFAULT);

        if (!empty($post['_method']) && in_array($post['_method'], ["PUT", "PATCH", "DELETE"])) {
            $this->httpMethod = $post['_method'];
            $this->data = $post;

            unset($this->data["_method"]);
            return;
        }

        if ($this->httpMethod == "POST") {
            $this->data = filter_input_array(INPUT_POST, FILTER_DEFAULT);

            unset($this->data["_method"]);
            return;
        }

        if (in_array($this->httpMethod, ["PUT", "PATCH", "DELETE"]) && !empty($_SERVER['CONTENT_LENGTH'])) {
            parse_str(file_get_contents('php://input', false, null, 0, $_SERVER['CONTENT_LENGTH']), $putPatch);
            $this->data = $putPatch;

            unset($this->data["_method"]);
            return;
        }

        $this->data = [];
        return;
    }

    /**
     * @param $handler
     * @param $namespace
     * @return string|callable
     */
    private function handler($handler, $namespace)
    {
        return (!is_string($handler) ? $handler : "{$namespace}\\" . explode($this->separator, $handler)[0]);
    }

    /**
     * @param $handler
     * @return null|string
     */
    private function action($handler): ?string
    {
        return (!is_string($handler) ?: (explode($this->separator, $handler)[1] ?? null));
    }
}