/// <summary>
/// Adds a micro thread function to the <paramref name="scriptSystem"/> that executes after waiting specified delay.
/// </summary>
/// <param name="scriptSystem">The <see cref="ScriptSystem"/>.</param>
/// <param name="action">The micro thread function to execute.</param>
/// <param name="delay">The amount of time to wait for.</param>
/// <param name="priority">The priority of the micro thread action being added.</param>
/// <returns>The <see cref="MicroThread"/>.</returns>
/// <exception cref="ArgumentNullException"> If <paramref name="scriptSystem"/> or <paramref name="action"/> is <see langword="null"/>.</exception>
/// <exception cref="ArgumentOutOfRangeException">If <paramref name="delay"/> is less than zero.</exception>
/// <remarks>
/// If the <paramref name="action"/> is a <see cref="ScriptComponent"/> instance method the micro thread will be automatically stopped if the <see cref="ScriptComponent"/> or <see cref="Entity"/> is removed.
/// </remarks>
public static MicroThread AddTask(
this ScriptSystem scriptSystem,
Func <Task> action,
TimeSpan delay,
long priority = 0L)
{
if (scriptSystem == null)
{
throw new ArgumentNullException(nameof(scriptSystem));
}
if (action == null)
{
throw new ArgumentNullException(nameof(action));
}
return(scriptSystem.AddTask(DoTask, priority));
//C# 7 Local function could also use a variable Func<Task> DoEvent = async () => { ... };
async Task DoTask()
{
var scriptDelegateWatcher = new ScriptDelegateWatcher(action);
await scriptSystem.WaitFor(delay, scriptDelegateWatcher);
if (scriptSystem.Game.IsRunning && scriptDelegateWatcher.IsActive)
{
await action();
}
}
}
