function CopyLayerToSession($map, $resourceService, $libraryLayerId)
{
//create the session MgResourceIdentifier
try {
$destinationLayerId = ToggleRepository($libraryLayerId);
$destinationLayerId->SetName($destinationLayerId->GetName() . '-edit');
//copy content from library layer
$contentReader = $resourceService->GetResourceContent($libraryLayerId);
$layerContent = $contentReader->ToString();
//set the feature source this layer references -- must be in the session
//the feature source need not exist before calling this function
$libraryLayer = new MgLayer($libraryLayerId, $resourceService);
$libraryFeatureSourceId = new MgResourceIdentifier($libraryLayer->GetFeatureSourceId());
$destinationFeatureSourceId = ToggleRepository($libraryFeatureSourceId);
//replace the featuresourceid and write xml to the session copy
$layerContent = str_replace($libraryFeatureSourceId->ToString(), $destinationFeatureSourceId->ToString(), $layerContent);
$byteSource = new MgByteSource($layerContent, strlen($layerContent));
$resourceService->SetResource($destinationLayerId, $byteSource->GetReader(), null);
//instantiate the new layer from its MgResourceIdentifier
$layer = new MgLayer($destinationLayerId, $resourceService);
//add the edit layer to the session map and set it to redraw but not be visible in the legend
$layerCollection = $map->GetLayers();
$originalLayer = FindLayer($layerCollection, $libraryLayer->GetLayerDefinition()->ToString());
$nPosition = $layerCollection->IndexOf($originalLayer);
$layerCollection->Insert($nPosition, $layer);
$layer->SetDisplayInLegend(false);
$layer->SetSelectable(true);
$layer->ForceRefresh();
//OR
//remove the library layer from the session map and replace it with the
//session copy
//ReplaceLayer($map, $libraryLayer, $layer);
//save the session map
$map->Save($resourceService);
} catch (MgException $e) {
echo "CopyLayerToSession threw exception\n";
echo "ERROR: " . $e->GetExceptionMessage() . "n";
echo $e->GetDetails() . "n";
echo $e->GetStackTrace() . "n";
}
return $layer;
}
