# Name of this service
service wintersport

config {
    # Defines the URL to request another web service.
    # The URL is the default and can be overwritten using an
    # external configuration.
    service station_details = "http://hostname/XmlResort.jsp?lang=de&stationId={station}"
    
    # Defines an XML file to query data in.
    dom locations = "data/skiorte.xml"
    
    # Number of stations to return
    int stations = 40
}

# Defines code which is executed in PHP.
@members:php {
    function getStations($locationsDom, $numStations, $x, $y) {
        $retval = array();
        $xp = new DOMXPath($locationsDom);
        
        $radius = 5000;
        while (count($retval) < $numStations && $radius < 200000) {
            $stations = getStationsInRadius($xp, $x, $y, $radius);
            $new = array_diff($stations, $retval);
            $retval = array_merge($retval, $new);
            $radius += 5000;
        }
        return array_slice($retval, 0, $numStations);
    }
    
    function getStationsInRadius($xp, $x, $y, $radius) {
        $start_x = $x - $radius;
        $end_x = $x + $radius;
        $start_y = $y - $radius;
        $end_y = $y + $radius;
        
        $query = "/resorts/resort[swiss_x > $start_x and swiss_x < $end_x][swiss_y > $start_y and swiss_y < $end_y]";
        $res = $xp->query($query);
        
        $retval = array();
        foreach ($res as $resultItem) {
            array_push($retval, $xp->query('station', $resultItem)->item(0)->nodeValue);
        }
        return $retval;
    }
}

GET /by_coordinates/{x},{y} {
    validate x /[0-9]+/
    validate y /[0-9]+/
    
    stations = function getStations(locations, stations, x, y)
    
    
    output.xml {
        <resorts>
            {transform stations using wintersport.xsl}
        </resorts>
    }
}