// GET api/<controller>
// GET api/<controller>/5
public object Get([FromUri] string[] path, string query = null)
{
var server = ConfigurationManager.AppSettings["opc-server"];
using (var client = new EasyUAClient())
{
UANodeElementCollection nodes = new UANodeElementCollection();
path = path.Where(p => p != null).ToArray(); //.FirstOrDefault()?.Split('/');
var nodePath = new List <UANodeElement>();
if (!path.Any())
{
nodes = client.BrowseObjects(server);
}
else
{
nodePath = GetNode(server, client, path, null).ToList();
if (!nodePath.Any())
{
return(null);
}
nodes = client.BrowseVariables(server, nodePath.Last());
}
return(new { path = path.Select((p, i) => new {
browseName = p,
node = NodeReturn(nodePath.ElementAtOrDefault(i))
}),
children = nodes.Select(NodeReturn) });
}
}
static IEnumerable <UANodeElement> GetNode(string server, EasyUAClient client, IEnumerable <string> path, IEnumerable <UANodeElement> currentNodes)
{
var _currentNodes = currentNodes ?? new List <UANodeElement>();
if (!path.Any())
{
return(currentNodes);
}
UANodeElementCollection nodes = new UANodeElementCollection();
if (!_currentNodes.Any())
{
nodes = client.BrowseObjects(server);
}
else
{
nodes = client.BrowseVariables(server, currentNodes.Last());
}
var node = nodes.SingleOrDefault(n => n.BrowseName.Name == path.First());
if (node != null)
{
return(GetNode(server, client, path.Skip(1), _currentNodes.Concat(new List <UANodeElement> {
node
})));
}
return(new List <UANodeElement>());
}
