public function GetSelectionOverview($sessionId, $mapName, $format)
{
$fmt = $this->ValidateRepresentation($format, array("xml", "json"));
$bIncludeBounds = $this->GetBooleanRequestParameter("bounds", false);
$this->EnsureAuthenticationForSite($sessionId);
$siteConn = new MgSiteConnection();
$siteConn->Open($this->userInfo);
$resSvc = $siteConn->CreateService(MgServiceType::ResourceService);
$featSvc = null;
if ($bIncludeBounds) {
$featSvc = $siteConn->CreateService(MgServiceType::FeatureService);
}
$map = new MgMap($siteConn);
$map->Open($mapName);
$selection = new MgSelection($map);
$selection->Open($resSvc, $mapName);
$output = "<SelectionOverview>";
if ($bIncludeBounds) {
$env = $selection->GetExtents($featSvc);
if ($env != null && !$env->IsNull()) {
$ll = $env->GetLowerLeftCoordinate();
$ur = $env->GetUpperRightCoordinate();
$output .= "<Bounds>";
$output .= "<MinX>";
$output .= $ll->GetX();
$output .= "</MinX>";
$output .= "<MinY>";
$output .= $ll->GetY();
$output .= "</MinY>";
$output .= "<MaxX>";
$output .= $ur->GetX();
$output .= "</MaxX>";
$output .= "<MaxY>";
$output .= $ur->GetY();
$output .= "</MaxY>";
$output .= "</Bounds>";
}
}
$layers = $selection->GetLayers();
if ($layers != NULL) {
for ($i = 0; $i < $layers->GetCount(); $i++) {
$layer = $layers->GetItem($i);
$layerName = $layer->GetName();
$output .= "<Layer>";
$output .= "<Name>";
$output .= $layerName;
$output .= "</Name>";
$output .= "<SelectionCount>";
$output .= $selection->GetSelectedFeaturesCount($layer, $layer->GetFeatureClassName());
$output .= "</SelectionCount>";
$output .= "<FeaturesUrl>";
$innerFormat = $format == "json" ? "geojson" : $format;
$output .= MgUtils::GetNamedRoute($this->app, "/session", "get_selected_features", array("sessionId" => $sessionId, "mapName" => $mapName, "layerName" => $layerName, "format" => $innerFormat));
$output .= "</FeaturesUrl>";
$output .= "</Layer>";
}
}
$output .= "</SelectionOverview>";
$bs = new MgByteSource($output, strlen($output));
$bs->SetMimeType(MgMimeType::Xml);
$br = $bs->GetReader();
if ($format == "json") {
$this->OutputXmlByteReaderAsJson($br);
} else {
$this->OutputByteReader($br);
}
}
