public object GetValue(string name)
{
Log.Debug($"GetValue called on path {Path}");
if (Path == null || !Path.Contains("."))
{
// If at the top, or at a server, the next part can't be a tag:
string nextPath = (Path == null) ? name : $"{Path}.{name}";
return(new OPCDataProvider {
Path = nextPath, Snapshot = this.Snapshot
});
}
string[] pathSplit = Path.Split(new char[] { '.' }, 2); // {Server Name}.{remaining.tag.path}
Folder folder = opcServerOrm.Fetch().Select(ext => ext.GetEntity()).FirstOrDefault(f => f.EntityName == pathSplit[0]) as Folder;
if (folder == null)
{
throw new Exception($"Could not find server named {pathSplit[0]}");
}
string[] eventIds = FolderService.GetFolderEntities <OPCEvent>(folder.FolderID).Select(e => e.Id).ToArray();
BaseTagValue mostRecentTag = null;
IDictionary <string, BaseTagValue> sourceDict = ((Snapshot as IDictionary <string, BaseTagValue>) ?? OPCEngine.mostRecentValues);
foreach (string eventId in eventIds)
{
string key = $"{eventId}|{pathSplit[1]}.{name}";
BaseTagValue tag;
if (sourceDict.TryGetValue(key, out tag))
{
if (mostRecentTag == null || mostRecentTag.TimeStamp < tag.TimeStamp)
{
mostRecentTag = tag;
}
}
}
if (mostRecentTag != null)
{
return(TagValueUtils.GetObjectValueFromTag(mostRecentTag));
}
// No current value found, so check folders to see whether this is a folder or a tag:
Folder tagDataFolder = folder.GetSubFolder().FirstOrDefault(x => x.EntityName == "Tag Data");
if (tagDataFolder == null)
{
throw new Exception("Tag data folder not found");
}
string[] parts = pathSplit[1].Split('.');
Folder currentFolder = tagDataFolder;
for (int i = 0; i < parts.Length; ++i)
{ // descend for each part, arriving at the folder which should contain the named entity
Folder nextFolder = currentFolder.GetSubFolder().FirstOrDefault(x => x.EntityName == parts[i]);
if (nextFolder == null)
{
throw new Exception($"Folder '{parts[i]}' not found in folder '{currentFolder?.EntityName}'.");
}
currentFolder = nextFolder;
}
Folder namedFolder = FolderService.GetFolderEntities <Folder>(currentFolder.FolderID).FirstOrDefault(x => x.EntityName == name);
if (namedFolder != null)
{
return new OPCDataProvider {
Path = $"{this.Path}.{name}", Snapshot = this.Snapshot
}
}
;
OPCTag namedTag = FolderService.GetFolderEntities <OPCTag>(currentFolder.FolderID).FirstOrDefault(x => x.EntityName == name);
if (namedTag != null)
{
throw new Exception($"Tag '{name}' has no known value");
}
else
{
throw new Exception($"No tag or folder '{name}' found in '{currentFolder.EntityName}'");
}
}
private void SetValues(string opcServerUrl, string eventId, BaseTagValueWrapper valuesWrapper)
{
BaseTagValue[] values = valuesWrapper.Values;
using (UserContextHolder.Register(new SystemUserContext()))
{
Folder configFolder = EntityCache <OPCServerFolderBehaviorData> .GetCache().AllEntities.FirstOrDefault(s => s.Url == opcServerUrl)?.GetEntity() as Folder;
if (configFolder == null)
{
return;
}
Array.ForEach(values, tagValue => { LOG.Debug($"Value Change: {tagValue.Path} - {TagValueUtils.GetObjectValueFromTag(tagValue)}"); });
// put values in last cache
foreach (var v in values)
{
string key = eventId + "|" + v.Path;
BaseTagValue priorValue;
OPCEngine.mostRecentValues.TryGetValue(key, out priorValue);
OPCEngine.mostRecentValues[key] = v;
if (priorValue == null)
{
OPCEngine.priorValues[key] = v;
}
else
{
OPCEngine.priorValues[key] = priorValue;
}
}
OPCEvent opcEvent = opcEventOrm.Fetch(eventId);
if (opcEvent == null || opcEvent.Disabled)
{
return;
}
bool runIt = false;
// see if this event is interested in this change
foreach (var v in opcEvent.EventValues)
{
if (values.FirstOrDefault(changedValue => changedValue.Path == v.PathToValue) != null)
{
runIt = true;
break;
}
}
if (runIt)
{
try
{
List <DataPair> inputs = new List <DataPair>();
foreach (var v in opcEvent.EventValues)
{
string key = eventId + "|" + v.PathToValue;
BaseTagValue value = null;
OPCEngine.mostRecentValues.TryGetValue(key, out value);
inputs.Add(new DataPair(v.Name, value));
BaseTagValue priorvalue = null;
OPCEngine.priorValues.TryGetValue(key, out priorvalue);
inputs.Add(new DataPair("Last " + v.Name, priorvalue));
}
inputs.Add(new DataPair("LastWorkflowRun", opcEvent.LastRun));
// check rule to see if it matches
var ruleResult = RuleEngine.RunRule(opcEvent.Rule, inputs.ToArray());
if (ruleResult != null && ruleResult is bool)
{
if (((bool)ruleResult) == true)
{
new Log("OPC").Error("Value Changed And Rule Returned True - running flow");
FlowEngine.Start(FlowEngine.LoadFlowByID(opcEvent.Flow, false, true),
new FlowStateData(inputs.ToArray()));
}
else
{
new Log("OPC").Error("Value Changed But Rule Returned False");
}
}
else
{
new Log("OPC").Error("Value Changed But Rule Returned False");
}
}
catch (Exception except)
{
new Log("OPC").Error(except, "Error running flow from event");
}
}
}
}