<?php
class Router {

    function __construct() {
    }

    public function handle() {
        try {
            $r = array();
            if ($_SERVER['REQUEST_METHOD'] == 'GET') {
                $this->handleGet($r);
                echo json_encode($r);
            } else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
                $this->handlePost($r);
                echo json_encode($r);
            }
        }
        catch (ErrorException $e) {
            echo $e->getMessage();
        }
    }

    public static function get($obj, $key) {
        if (isset($obj[$key])) {
            return mysql_escape_string($obj[$key]);
        }
        throw new ErrorException();
    }

    public function handleGet(&$r) {

        if(isset($_GET['component'])){
            $this->handleComponent($r);
            return;    }
        elseif(isset($_GET['templates'])){
            $template = new TemplateLoader();
            $template->handle($r);
            return;}
        else{
            throw new ErrorException("Component Error");
        }
        return;
    }

    public function handleComponent(&$r) {
        $r['req'] = array();
        $component = self::get($_GET, 'component');
        $r['req']['component'] = $component;
        $r['req']['target'] = self::get($_GET, 'target');

        if ($component == 'main') {
            //http://localhost/example/?component=main
            $r["images"] = Main::$data -> get3Images();
            $r["updates"] = array();
            $r["comments"] = array();

            $r["template"] = 'main';
            return;
        }
        if ($component == 'depots') {
            //http://localhost/example/?component=depots&location=1
            $location = self::get($_GET, 'location');
            $r['req']['location'] = $location;
            $r["location"] = $location;
            $r["depots"] = array( array("id" => "1", "name" => "park1", ));
            return;
        }
        if ($component == 'depot_buses') {
            //http://localhost/example/?component=depot_buses&depot=1
            $depot = self::get($_GET, 'depot');
            $r['req']['depot'] = $depot;

            $r["depot"] = $depot;
            $r["buses"] = array("buses" => 'array()');
            return;
        }
        if ($component == 'search') {
            $r["search"] = array();
            return;
        }
        if ($component == 'bus') {
            $id = self::get($_GET, 'id');
            $r['req']['id'] = $id;

            $bus = Main::$data->getBus($id);
            $r['bus'] = $bus;

            $images = Main::$data->getBusImages($id);
            $r['images'] = $images;
            $r['template'] = 'bus';
            return;
        }
        if ($component == 'gallery') {
            //http://localhost/example/?component=gallery
            $r['gallery'] = Main::$data->getGallery();
            return;
        }
        if ($component == 'comments') {
            //http://localhost/example/?component=comments
            $r["comments"] = array( array('id' => 1, 'bus' => 1, 'text' => 'text1'), array('id' => 2, 'bus' => 3, 'text' => 'text2'), array('id' => 3, 'bus' => 4, 'text' => 'text3'));
            return;
        }

        if ($component == 'locations') {
            //http://localhost/example/?component=locations
            $r["locations"] = Main::$data -> getLocations();
            $r["template"] = 'locations';
            return;
        }

        throw new ErrorException("component error");
    }

    public function handlePost(&$r) {
        $component = self::get($_POST, 'component');
        $r['req']['component'] = $component;
        $r['req']['target'] = self::get($_POST, 'target');
        if ($component == 'bus') {
            $fields = array(
            "id",
            "location",
            "service_type",
            "depot",
            "model",
            "state",
            "plate_nr",
            "built",
            "page_views",
            );

            $bus = array();
            foreach ($fields as $field) {
                $bus[$field] = self::get($_POST, $field);
            }
            $r['req']['bus'] = $bus;
            $id = mysql_real_escape_string($r['req']['bus']['id']);
            $count = Main::$data->getSingleCell("select count(1) from bus where id = '$id'");

            if($count > 1){
                throw new ErrorException("post error");
            }

            if($count == 1){
                Main::$data->updateBus($bus);
            }

            if($count == 0){
                $id = Main::$data->updateBus($bus,TRUE);
                $r['location'] = "component=bus&target=content&id=$id";
            }

            $bus = Main::$data->getBus($id);
            $r['bus'] = $bus;

            $images = Main::$data->getBusImages($id);
            $r['images'] = $images;

            $r['template'] = 'bus';

            return;
        }
        throw new ErrorException("post error");
    }

}
?>