/// <summary>
/// Delete attribute of base item before base item is deleted
/// </summary>
/// <param name="item">Base item about to be deleted</param>
public void OnItemDelete(Item item)
{
if (item.HasData <JavascriptItemData>())
{
var data = item.GetData <JavascriptItemData>();
JavascriptItemDataRepo.Delete(data);
}
}
/// <summary>
/// Create attribute, if present, after item is created
/// </summary>
/// <param name="item">Base item just created from datastore</param>
public void OnItemCreate(Item item)
{
if (item.HasData <JavascriptItemData>())
{
var data = item.GetData <JavascriptItemData>();
data.DataItemId = item.Id;
data.ScriptFunctions = GetFunctionDeclarations(data.Script);
JavascriptItemDataRepo.Create(data);
}
}
/// <summary>
/// Append attribute to base item when it is loaded
/// </summary>
/// <param name="item">Base item just read from datastore</param>
public void OnItemRead(Item item)
{
var data = JavascriptItemDataRepo.Read(item);
if (data != null)
{
item.Data.Add(data);
item.AddProperty(typeof(JavascriptItemProperty), new JavascriptItemProperty()
{
});
ExecuteFunction(item, "onItemRead", item);
}
}
/// <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 onTick javascript function on all items that have it
/// </summary>
public void OnTick()
{
if (TickCount++ >= TickInterval)
{
Logger.LogInformation("Running item scripts");
var javascriptDatas = JavascriptItemDataRepo.Read();
javascriptDatas.ForEach(data =>
{
if (data.ScriptFunctions.Contains(":onTick:", StringComparison.InvariantCultureIgnoreCase))
{
var item = ItemManager.Read(data.DataItemId);
if (item == null)
{
throw new BeforeOurTimeException($"No item ({data.DataItemId}) found for javascript data ({data.Id})");
}
JavascriptItemDataManager.ExecuteFunction(item, "onTick");
}
});
TickCount = 0;
}
}
/// <summary>
/// Execute a javascript function of an item
/// </summary>
/// <param name="item"></param>
/// <param name="name"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public object ExecuteFunction(Item item, string name, params object[] parameters)
{
object report = null;
if (item.GetData <JavascriptItemData>() is JavascriptItemData data)
{
if (data.ScriptFunctions.Contains($":{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);
}
/// <summary>
/// Get all unique item identifiers of managed items
/// </summary>
/// <returns></returns>
public List <Guid> GetItemIds()
{
var itemIds = JavascriptItemDataRepo.GetItemIds();
return(itemIds);
}
