/// <summary>
/// Append attribute to base item when it is loaded
/// </summary>
/// <param name="item">Base item about to be persisted to datastore</param>
public void OnItemUpdate(Item item)
{
if (item.HasData <JavascriptItemData>())
{
var data = item.GetData <JavascriptItemData>();
if (data.Id == Guid.Empty)
{
OnItemCreate(item);
}
else
{
data.ScriptFunctions = GetFunctionDeclarations(data.Script);
JavascriptItemDataRepo.Update(data);
}
}
else if (JavascriptItemDataRepo.Read(item) is JavascriptItemData data)
{
JavascriptItemDataRepo.Delete(data);
}
}
/// <summary>
/// Execute a javascript function of an item
/// </summary>
/// <param name="item"></param>
/// <param name="name"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public object ExecuteFunction(Item item, string name, params object[] parameters)
{
object report = null;
if (item.GetData <JavascriptItemData>() is JavascriptItemData data)
{
if (data.ScriptFunctions.Contains($":{name}:", StringComparison.InvariantCultureIgnoreCase) &&
data.Disabled == false)
{
try
{
lock (_lock)
{
JSEngine.EnterExecutionContext(JSEngine.GlobalEnvironment, JSEngine.GlobalEnvironment, null);
SetupJintItem(JSEngine, item);
JSEngine.Execute(data.Script);
report = JSEngine.Invoke(name, parameters)?.ToObject();
JSEngine.LeaveExecutionContext();
}
}
catch (Exception e)
{
data.ErrCount += 1;
data.ErrDescriptions += $"Executing {name}: {e.Message}\n";
Logger.LogException($"JS Engine executing {name} in {item.Id}", e);
if (data.ErrCount >= 10)
{
data.Disabled = true;
Logger.LogError($"Disabled javascript for item {item.Id}");
Logger.LogException($"JS Engine executing {name} in {item.Id}", e);
}
JavascriptItemDataRepo.Update(data);
}
}
}
return(report);
}