Router.php

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<?php

namespace Tools;

class Router
{
    private $rootPath;

    private $rootUrl;

    private $requestUrl;

    private $routes;

    private $context;

    private $routeParams;

    public function __construct($server, $context)
    {
        $pos = strrpos($server["SCRIPT_NAME"], "/");
        $relativePath = (($pos === FALSE) ? "" : substr($server["SCRIPT_NAME"], 0, $pos));
        $this->rootPath = $server["DOCUMENT_ROOT"] . $relativePath . "/";
        $this->rootUrl = $server["REQUEST_SCHEME"] . "://" . $server["HTTP_HOST"] . $relativePath ."/";
        $this->requestUrl = substr($server["REQUEST_URI"], count($this->rootUrl) -1);
        $this->context = $context;
        $this->routes = array();
    }

    public function init($server)
    {
        $siteUrl = \Entity\Config::getConfig(null, "siteUrl");
        if ($siteUrl != $server["HTTP_HOST"] && $siteUrl !== null)
        {
            header("location: http://{$siteUrl}{$server['REQUEST_URI']}");
            die;
        }
    }

    public function serveUrl()
    {
        //TODO trigger hook GET, POST
        $this->prepareUrl();
        $requestParams = explode("/", $this->requestUrl);
        foreach ($this->routes as $i)
        {
            $routeParams = explode("/", $i[0]);
            $p = $this->routeMatch($requestParams, $routeParams);
            if (!$p)
                continue;
            $controller = $this->createController($i[1], $p);
            if ($controller)
                return $controller;
        }
        return false;
    }

    private function createController($className, $params)
    {
        if (!class_exists($className))
            return false;
        try
        {
            $this->routeParams = $params;
            $result = new $className($this->context, $params);
        }
        catch (\Exception\Error404 $e)
        {
            return false;
        }
        if (!($result instanceof \Tools\AController))
            return false;
        return $result;
    }

    private function routeMatch($request, $route)
    {
        $i = count($request);
        $params = array();
        if ($i != count($route))
            return false;
        while ($i)
        {
            $i--;
            if ($route[$i] == '' && $request[$i] == '')
                continue;
            if ($route[$i] == '' || $request[$i] == '')
                return false;
            if ($route[$i][0] != ':' && ($route[$i] != $request[$i]))
                return false;
            if ($route[$i][0] == ':')
                $params[$route[$i]] = $request[$i];
            $params[$i -1] = $request[$i];
        }
        return array_reverse($params);
    }

    private function prepareUrl()
    {
        $fetcher = new \Entity\Cms();
        $pages = $fetcher->selects(null, array("order"));
        foreach ($pages as $i)
            $this->doRouteAdd($i->shurl, $i->controller);
    }

    private function doRouteAdd($route, $controller)
    {
        $this->routes[] = array($route, $controller);
    }

    public function routeAdd($route, $controller)
    {
        if (!$this->context->hookManager->isInHook("routerSetup"))
            throw new \Exception("You can only add routes from `routerSetup' hook");
        $this->doRouteAdd($route, $controller);
    }

    public function __get($key)
    {
        switch ($key)
        {
        case "rootPath": return $this->rootPath; break;
        case "rootUrl": return $this->rootUrl; break;
        case "modulesPath": return $this->rootPath."content/modules/"; break;
        case "modulesUrl": return $this->rootUrl."content/modules/"; break;
        case "themesPath": return $this->rootPath."content/theme/"; break;
        case "themesUrl": return $this->rootUrl."content/theme/"; break;
        }
        throw new \Exception("Cannot access attribute {$key}");
    }
}