public static AppState Reduce(AppState previousState, object action)
{
switch (action)
{
case SelectHabitAction selectHabitAction:
{
if (previousState.SelectedHabit != null)
{
var habitId = previousState.SelectedHabit.Id;
var previousSelectedHabit = previousState.Habits.Find(habit => habit.Id == habitId);
if (previousSelectedHabit != null)
{
previousSelectedHabit.Selected = false;
}
}
previousState.SelectedHabit = selectHabitAction.Habit;
previousState.SelectedHabit.Selected = true;
previousState.Tasks.Clear();
previousState.Tasks.AddRange(FormatTasks(previousState.SelectedHabit));
return(previousState);
}
case UpdateHabitAction updateHabitAction:
updateHabitAction.Habit.Title = updateHabitAction.NewTitle;
return(previousState);
case DeleteHabitAction deleteHabitAction:
previousState.Habits.Remove(deleteHabitAction.Habit);
return(previousState);
case AddHabitAction addHabitAction:
previousState.Habits.Add(addHabitAction.Habit);
if (previousState.Habits.Count == 1)
{
Reduce(previousState, new SelectHabitAction(addHabitAction.Habit));
}
return(previousState);
case ChangeTaskStatusAction changeTaskStatusAction:
var status = changeTaskStatusAction.TaskData.Status;
var task = changeTaskStatusAction.TaskData;
if (status == TaskStatus.Completed)
{
task.Status = TaskStatus.Failed;
}
else if (status == TaskStatus.Failed)
{
task.Status = TaskStatus.Skipped;
}
else if (status == TaskStatus.Skipped || status == TaskStatus.UnSetted)
{
task.Status = TaskStatus.Completed;
}
var selectedHabit = previousState.SelectedHabit;
var searchedTask = selectedHabit.Tasks.Find(searchTask => searchTask.Id == task.Id);
if (searchedTask != null)
{
searchedTask.Status = task.Status;
}
searchedTask = previousState.Tasks.Find(searchTask => searchTask.Id == task.Id);
if (searchedTask != null)
{
searchedTask.Status = task.Status;
}
var searchedHabit = previousState.Habits.Find(searchHabit => searchHabit.Id == selectedHabit.Id);
if (searchedHabit != null)
{
searchedTask = searchedHabit.Tasks.Find(searchTask => searchTask.Id == task.Id);
if (searchedTask != null)
{
searchedTask.Status = task.Status;
}
}
return(previousState);
}
return(previousState);
}