public void CreateTask <T>(ITaskArguments taskArguments, TaskPriority taskPriority = TaskPriority.NORMAL) where T : TaskBehaviour
{
if (!ReferenceEquals(_currentTask, null) && taskPriority >= _currentTask.TaskPriority)
{
CancelTask();
TaskBehaviour taskBehaviour = gameObject.AddComponent <T>();
taskBehaviour.Initialize(taskArguments, taskPriority);
AddTask(taskBehaviour);
return;
}
// Verify if the new Task is the same as an existing task, if so combine them.
if (!ReferenceEquals(_currentTask, null) && _currentTask.TaskArguments.GetTaskType() == taskArguments.GetTaskType())
{
_currentTask.Combine(taskArguments);
return;
}
if (_taskBehaviours.Count > 0 && _taskBehaviours.Peek().TaskArguments.GetTaskType() == taskArguments.GetTaskType())
{
// It is the same as the next one, therefore don't recreate a task for nothing.
_taskBehaviours.Peek().Initialize(taskArguments, taskPriority);
}
else
{
TaskBehaviour taskBehaviour = gameObject.AddComponent <T>();
taskBehaviour.Initialize(taskArguments, taskPriority);
AddTask(taskBehaviour);
}
}
private void AddTask(TaskBehaviour taskBehaviour)
{
_taskBehaviours.Enqueue(taskBehaviour);
// Invoke on Add Task event.
OnAddTaskEvent?.Invoke(taskBehaviour);
if (!_isExecuting)
{
ScheduleTask();
}
}
private void ScheduleTask()
{
// Task is executing;
_isExecuting = true;
// Fetch the new task.
_currentTask = _taskBehaviours.Dequeue();
// Subscribe to the event.
_currentTask.OnEndCallback += OnTaskEnd;
// Start executing the task.
_currentTask.Execute();
}
private void OnTaskEnd(TaskBehaviour taskBehaviour)
{
// Unsubscribe to the event.
taskBehaviour.OnEndCallback -= OnTaskEnd;
Destroy(taskBehaviour);
_currentTask = null;
// Invoke On End Task Event;
OnEndTaskEvent?.Invoke(taskBehaviour);
_isExecuting = false;
if (_taskBehaviours.Count > 0)
{
ScheduleTask();
}
}