public void InitializeDomainFromDatabase(
ITaskItemRepositoryFactory taskItemRepositoryFactory,
INotificationManager notificationManager,
ITaskManager taskManager,
IClock clock)
{
/*
* hook up to notfication added event now, so to retrieve new notifications generated by
* the TaskItems being created below
*/
notificationManager.NotificationAdded += OnNotificationAdded;
/*
* read in task items from database. Create domain taskItems from
* data and add items to taskManager
*/
ITaskItemRepository taskItemRepository = taskItemRepositoryFactory.New();
foreach (TaskItemDAL task in taskItemRepository.GetAll())
{
INotificationFrequency notificationFrequency = null;
if (task.customNotificationFrequency.HasValue)
{
CustomNotificationFrequencyDAL frequencyDAL = task.customNotificationFrequency.Value;
notificationFrequency = NotificationFrequencyFactory.New(
//TODO: do something safer than just a cast
(NotificationFrequencyType)task.notificationFrequencyType,
frequencyDAL.time
);
}
else
{
notificationFrequency = NotificationFrequencyFactory.New(
//TODO: do something safer than just a cast
(NotificationFrequencyType)task.notificationFrequencyType
);
}
taskManager.Add(
new TaskItem(
task.title,
task.description,
new Colour(task.r, task.g, task.b),
task.startTime,
notificationManager,
notificationFrequency,
clock,
task.lastNotificationTime,
task.id
)
);
}
}
/// <summary>
/// Executes the logic of the <see cref="ViewTasksUseCase"/>. Retrieves TaskItem data and
/// stores it in the <see cref="ViewTasksUseCase"/>'s Output property.
/// </summary>
public ViewTasksOutput Execute(ViewTasksInput input)
{
ITaskItemRepository taskRepo = taskItemRepositoryFactory.New();
ViewTasksOutput output = new ViewTasksOutput {
Success = true
};
/*
* go through all taskItems in database then add them to the Output property as
* TaskItemDTO's.
*/
foreach (TaskItem domainTask in taskManager.GetAll())
{
//retrieve dataLayer task which carries notification frequency description
Maybe <TaskItemDAL> maybeTask = taskRepo.GetById(domainTask.ID);
if (maybeTask.HasValue)
{
TaskItemDAL taskDAL = maybeTask.Value;
TimeSpan customFrequencyTime = new TimeSpan();
//if the current taskItem has a custom frequency type, then retrieve its Time value
if (taskDAL.customNotificationFrequency.HasValue)
{
CustomNotificationFrequencyDAL frequencyDAL = taskDAL.customNotificationFrequency.Value;
customFrequencyTime = frequencyDAL.time;
}
DTO.TaskItemDTO taskDTO =
new DTO.TaskItemDTO()
{
Id = domainTask.ID,
Title = domainTask.Title,
Description = domainTask.Description,
R = domainTask.Colour.R,
G = domainTask.Colour.G,
B = domainTask.Colour.B,
StartTime = domainTask.StartTime,
//TODO: prefer to do a better conversion that just a cast to an enum
NotificationFrequencyType =
(NotificationFrequencyType)taskDAL.notificationFrequencyType,
CustomNotificationFrequency = customFrequencyTime
};
output.TaskItems.Add(taskDTO);
}
}
return(output);
}
protected void OnNotificationAdded(object source, Notification notification)
{
//update database with new notification
NotificationDAL notificationDal = new NotificationDAL {
taskId = notification.Producer.ID,
time = notification.Time
};
INotificationRepository notificationRepo = notificationRepositoryFactory.New();
notificationRepo.Add(notificationDal);
ITaskItemRepository taskRepo = taskItemRepositoryFactory.New();
List <TaskItemDAL> tasks = new List <TaskItemDAL>(taskRepo.GetAll());
if (notification.Producer is TaskItem task)
{
//update the notifications producer in the database
TaskItemDAL taskItemDAL = tasks.Find(t => t.id == task.ID);
taskItemDAL.lastNotificationTime = task.LastNotificationTime;
if (taskRepo.Update(taskItemDAL) == false)
{
//could not update task in database
}
//create DTO to invoke NotificationAdded with
NotificationDTO dto = new NotificationDTO()
{
TaskId = task.ID,
Time = notification.Time,
Title = notification.Producer.Title,
R = task.Colour.R,
G = task.Colour.G,
B = task.Colour.B
};
//invoked event delegates
NotificationAdded?.Invoke(source, dto);
}
taskRepo.Save();
notificationRepo.Save();
}
/// <summary>
/// Executes the ViewNotificationsUseCase. Sets the Output property of the UseCase object
/// once complete
/// </summary>
public ViewNotificationsOutput Execute(ViewNotificationsInput input)
{
//no input for use case
ITaskItemRepository taskRepo = taskItemRepositoryFactory.New();
ViewNotificationsOutput output = new ViewNotificationsOutput {
Success = true
};
/*
* Get all notifications that are present in the application, convert them to DTO's, then
* add them to a collection to return
*/
INotificationRepository notificationRepository = notificationRepositoryFactory.New();
foreach (NotificationDAL notification in notificationRepository.GetAll())
{
Maybe <TaskItemDAL> maybeTask = taskRepo.GetById(notification.taskId);
if (maybeTask.HasValue)
{
TaskItemDAL taskDAL = maybeTask.Value;
NotificationDTO dto = new NotificationDTO()
{
TaskId = taskDAL.id,
Title = taskDAL.title,
Time = notification.time,
R = taskDAL.r,
G = taskDAL.g,
B = taskDAL.b
};
output.Notifications.Add(dto);
}
}
return(output);
}
public CreateTaskOutput Execute(CreateTaskInput input)
{
if (input is null)
{
throw new ArgumentNullException(nameof(input));
}
if (input.IsValid())
{
//create new Domain TaskItem from the supplied input data
TaskItem newTask = InputToTaskItem(input);
if (taskManager.Add(newTask))
{
ITaskItemRepository taskItemRepo = taskItemRepositoryFactory.New();
//Create a TaskItemDAL to save to the database
TaskItemDAL taskItemDAL = TaskItemAndInputToDAL(newTask, input);
//add the new TaskItemDAL to the database
if (taskItemRepo.Add(taskItemDAL))
{
//save the changed make to the TaskItemRepository
if (taskItemRepo.Save())
{
//create DTO to return as Output data
TaskItemDTO taskItemDTO = InputToTaskItemDTO(input);
//fill output data and return
return(new CreateTaskOutput {
Success = true, TaskItemDTO = taskItemDTO
});
}
else
{
//failed to save state of repository
//remove taskItem from domain TaskManager
if (!taskManager.Remove(newTask))
{
//TaskItem could not be removed. we're now screwed . . .
//TODO: decide what to do here
}
return(new CreateTaskOutput {
Success = false, Error = "Unable to save the new Task."
});
}
}
else
{
//failed to save task to repository
//remove taskItem from domain TaskManager
if (!taskManager.Remove(newTask))
{
//TaskItem could not be removed. we're now screwed . . .
//TODO: decide what to do here
}
return(new CreateTaskOutput {
Success = false, Error = "Unable to save the new Task."
});
}
}
else
{
//unable to add new TaskItem to domain TaskManager
return(new CreateTaskOutput {
Success = false, Error = "Unable to process the new Task."
});
}
}
else
{
//Input is not valid
return(new CreateTaskOutput {
Success = false, Error = input.GetErrorMessage()
});
}
}
/// <summary>
/// Deletes a Task Item from the application
/// </summary>
/// <param name="input">
/// Holds the input necessary for deleting a TaskItem
/// </param>
/// <returns>
/// The result of deleting the TaskItem
/// </returns>
public DeleteTaskUseCaseOutput Execute(DeleteTaskUseCaseInput input)
{
Guid idToDelete = input.Id;
ITaskItemRepository taskRepo = taskItemRepositoryFactory.New();
//retrieve task item to delete
Maybe <TaskItemDAL> maybeTask = taskRepo.GetById(idToDelete);
if (maybeTask.HasValue)
{
TaskItemDAL taskToDelete = maybeTask.Value;
//delete task item from repository
if (taskRepo.Delete(idToDelete) == false)
{
//unable to delete task
return(new DeleteTaskUseCaseOutput()
{
Error = "Unable to to delete TaskItem", Success = false
});
}
//delete task item from domain
if (taskItemManager.Remove(idToDelete) == false)
{
//failed to remove TaskItem from domain
//TODO : handle this appropriately
return(new DeleteTaskUseCaseOutput()
{
Error = "Unable to to delete TaskItem", Success = false
});
}
INotificationRepository notificationRepo = notificationRepositoryFactory.New();
//iterate through notifications in repository and delete those generated by the deleted task
foreach (NotificationDAL notificationDAL in notificationRepo.GetAll())
{
if (notificationDAL.taskId == idToDelete)
{
if (notificationRepo.Delete(notificationDAL) == false)
{
//unable to delete notification
//TODO : handle this appropriately
}
}
}
//delete task notifications in domain
if (notificationManager.Remove(idToDelete) == false)
{
//failed to remove task notifications from domain
//TODO : handle this appropriately
}
notificationRepo.Save();
taskRepo.Save();
}
else
{
return(new DeleteTaskUseCaseOutput()
{
Error = "Unable to find TaskItem to delete", Success = false
});
}
return(new DeleteTaskUseCaseOutput()
{
Success = true
});
}
