DDD द्वारा डिज़ाइन किया गया। भाग 1: डोमेन और अनुप्रयोग

public abstract class TaskBase : Entity { protected TaskBase(string summary, string desc) { ChangeSummary(summary); ChangeDescription(desc); } protected TaskBase() { } public string Summary { get; private set; } public string Description { get; private set; } public bool IsComplete { get; protected set; } public virtual void Complete() { if (IsComplete) throw new InvalidOperationException("Task is already completed"); IsComplete = true; } public void ChangeSummary(string summary) { Summary = summary; } public void ChangeDescription(string description) { Description = description; } } 

  public class IndeterminateTask : TaskBase { public IndeterminateTask(string summary, string desc, Category category) : base(summary, desc) { Category = category; } protected IndeterminateTask() { } public Category Category { get; private set; } public void ChangeCategory(Category category) { Category = category; } } 

 public abstract class DailyTask : TaskBase { protected DailyTask(string summary, string desc, DateTime setupDay) : base(summary, desc) { DueToDate = setupDay; } protected DailyTask() { } public DateTime DueToDate { get; private set; } public void ChangeDueDate(DateTime dueToDate) { DueToDate = dueToDate; } } 

  public class SingleDailyTask : DailyTask { public SingleDailyTask(string summary, string desc, DateTime setupDay, bool isWholeDay) : base(summary, desc, setupDay) { IsWholeDay = isWholeDay; } protected SingleDailyTask() { } public bool IsWholeDay { get; private set; } public void ChangeIsWholeDay(bool isWholeDay) { IsWholeDay = isWholeDay; if (IsWholeDay) { ChangeDueDate(DueToDate.Date); } } } 

  public class MultipleDailyTask : DailyTask { public MultipleDailyTask(string summary, string desc, DateTime setupDay, IEnumerable<DateTime> dueToDates) : base(summary, desc, setupDay) { ChangeSubtasks(dueToDates.ToList()); } protected MultipleDailyTask() { } public virtual ICollection<Subtask> Subtasks { get; set; } public override void Complete() { throw new NotSupportedException(); } public void CompleteSubtask(DateTime subtaskDueDate) { if (Subtasks == null) throw new InvalidOperationException(); var subtask = Subtasks.FirstOrDefault(i => i.DueTime == subtaskDueDate); if (subtask == null) throw new InvalidOperationException(); subtask.Complete(DateTime.Now); var hasUncompleted = Subtasks.Any(i => i.CompletedAt == null); if (!hasUncompleted) { base.Complete(); } } public bool HasUncompletedSubtasks { get { return Subtasks != null && Subtasks.Any(i => i.CompletedAt == null); } } public int CompletionPercentage { get { var totalSubtasks = Subtasks.Count; var completedSubtasks = Subtasks.Count(i => i.CompletedAt.HasValue); if (totalSubtasks == 0 || totalSubtasks == completedSubtasks) return 100; return (int) Math.Round(completedSubtasks * 100.0 / totalSubtasks, 0); } } public void ChangeSubtasks(ICollection<DateTime> subtasksDueToDates) { var times = subtasksDueToDates.Select(i => i.ToTime()); if (Subtasks == null) { Subtasks = times.Select(i => new Subtask(i)).ToList(); return; } var oldSubtasks = Subtasks.ToList(); var newSubtasks = times.ToList(); //removing no longer exist items foreach (var oldSubtask in oldSubtasks) { if (!newSubtasks.Contains(oldSubtask.DueTime)) { Subtasks.Remove(oldSubtask); } } //adding new foreach (var newSubtask in newSubtasks) { if (Subtasks.All(i => i.DueTime != newSubtask)) { Subtasks.Add(new Subtask(newSubtask)); } } } } 

  public class Subtask : Entity { public DateTime DueTime { get; private set; } public DateTime? CompletedAt { get; private set; } public Subtask(DateTime dueTime) { DueTime = dueTime; } public void Complete(DateTime completedAt) { CompletedAt = completedAt; } protected Subtask() { } } 

  public class Category : Entity { public Category(string name, Category parentCategory) { Name = name; ParentCategory = parentCategory; } protected Category() { } public string Name { get; private set; } public virtual ICollection<IndeterminateTask> Tasks { get; set; } public virtual ICollection<Category> ChildrenCategories { get; set; } public virtual Category ParentCategory { get; private set; } public void ChangeName(string name) { Name = name; } public void ChangeParentCategory(Category category) { ParentCategory = category; } }