/// <summary>
/// Adds a micro thread function to the <paramref name="scriptSystem"/> that executes when the event is published.
/// </summary>
/// <typeparam name="T">The type of the event handler parameter.</typeparam>
/// <param name="scriptSystem">The <see cref="ScriptSystem"/>.</param>
/// <param name="eventKey">The event to wait for.</param>
/// <param name="action">The micro thread function to execute.</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"/>, <paramref name="eventKey"/> or <paramref name="action"/> is <see langword="null"/>.</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 AddOnEventTask <T>(
this ScriptSystem scriptSystem,
EventKey <T> eventKey, Func <T, Task> action,
long priority = 0L)
{
if (scriptSystem == null)
{
throw new ArgumentNullException(nameof(scriptSystem));
}
if (eventKey == null)
{
throw new ArgumentNullException(nameof(eventKey));
}
if (action == null)
{
throw new ArgumentNullException(nameof(action));
}
return(scriptSystem.AddOnEventTask(new EventReceiver <T>(eventKey), action, priority));
}