/**
* Set an option
*
* XMLPOIConnector supports one option, "stylesheet"
*
* @param string $optionName
* @param string $optionValue
*
* @return void
*/
public function setOption($optionName, $optionValue)
{
switch ($optionName) {
case "stylesheet":
$this->setStyleSheet($optionValue);
break;
default:
parent::setOption($optionName, $optionValue);
break;
}
}
/**
* Determines nearby POIs and stores them for later use
*
* @param Filter $filter
*
* @return int number of POIs
*/
public function determineNearbyPOIs(Filter $filter)
{
if (isset($filter->pageKey)) {
$offset = $filter->pageKey * self::POIS_PER_PAGE;
} else {
$offset = 0;
}
if (($offset == 0 || !$this->session_restore($filter->userID)) && !empty($this->poiConnector)) {
$this->response = $this->poiConnector->getLayarResponse($filter);
$pois = $this->response->hotspots;
foreach ($pois as $poi) {
if ($poi->distance > $this->response->radius) {
$this->response->radius = $poi->distance;
}
// fix a scaling bug in the iPhone 5.0.2
if (!empty($filter->userAgent) && strpos($filter->userAgent, "Layar/5.0.2 iPhoneOS") !== FALSE) {
if ($poi->dimension == 3) {
if (!empty($poi->transform->scale) && !empty($poi->object->size)) {
$poi->transform->scale = $poi->transform->scale / $poi->object->size;
}
}
}
}
$this->session_save($filter->userID);
}
// iterate over POIs and determine max distance
// TODO: do something sensible with this
// Current implementation adds all POIs in the order they are
// retrieved, while according to the spec max 50 POIs are displayed.
// So limit POIs to max. 50, optionally after sorting by distance.
// Maybe make the sorting order a config setting
//
// JdS 2010-07-08
// --- 8< ---
// ordering is done by POIConnectors using the most
// efficient technique available for the specific data source
//
// Propose to let POI cutoff be determined by client, not enforce
// 50 POI maximum in server
// --- >8 ---
//
// JdS 2010-07-08
// --- 8< ---
// TODO: rewrite the last part of this method. We're cutting in the
// object's response->hotspots for the final response. This works
// because the complete set has already been saved in the session a
// few lines before, but this approach is a bit murky. However, other
// parts of PorPOISe rely on getNearbyPOIs to return only the POIs
// for the current page so if we're gonna separate the POI sets for
// the current page and the overall request we need to fix some more
// lines than just the next 10 or so
// --- >8 ---
$this->hasMorePOIs = FALSE;
$this->nextPageKey = NULL;
$numPois = count($this->response->hotspots);
if ($numPois - $offset > self::POIS_PER_PAGE) {
$this->response->morePages = TRUE;
$this->response->nextPageKey = $offset / self::POIS_PER_PAGE + 1;
}
if ($offset > $numPois) {
// no POIs on this page
$this->response->hotspots = array();
} else {
$limit = min(self::POIS_PER_PAGE, $numPois - $offset);
$this->response->hotspots = array_slice($this->response->hotspots, $offset, $limit);
}
if (!$this->hasMorePOIs) {
$this->session_delete($filter->userID);
}
return $numPois;
}