/// <summary>
/// Moves task {task} from the subtasks list of the
/// epic task {epicTask} to the general tasks list in specified project.
/// </summary>
/// <param name="project">Project object</param>
/// <param name="task">Simple/Story task object</param>
/// <param name="epicTask">Epic task object</param>
/// <exception cref="ArgumentException">Exception throws when the specified task is not
/// simple or story.</exception>
public void RemoveTaskFromEpic(Project project, IAssignable task, EpicTask epicTask)
{
switch (task)
{
case BugTask _:
throw new ArgumentException("Unable to remove bug task from the epic task.");
case SimpleTask simple:
if (epicTask.SimpleTasks.Any(t => t.Id == simple.Id))
{
epicTask.SimpleTasks.Remove(
epicTask.SimpleTasks.Find(t => t.Id == simple.Id));
}
break;
case StoryTask story:
if (epicTask.StoryTasks.Any(t => t.Id == story.Id))
{
epicTask.StoryTasks.Remove(
epicTask.StoryTasks.Find(t => t.Id == story.Id));
}
break;
default:
throw new ArgumentException("This task wasn't located in this epic task.");
}
}
/// <summary>
/// Moves task {task} to the subtasks list of the
/// epic task {epicTask} in specified project.
/// </summary>
/// <param name="project">Project object</param>
/// <param name="task">Simple/Story task object</param>
/// <param name="epicTask">Epic task object</param>
/// <exception cref="ArgumentException">Exception throws when the specified task is not
/// simple or story.</exception>
public void InsertTaskToEpic(Project project, IAssignable task, EpicTask epicTask)
{
switch (task)
{
case BugTask _:
throw new ArgumentException("Unable to insert bug task to the epic task.");
case SimpleTask simple:
epicTask.SimpleTasks.Add(simple);
break;
case StoryTask story:
epicTask.StoryTasks.Add(story);
break;
default:
throw new ArgumentException("Invalid task.");
}
}
/// <summary>
/// Creates epic task in specified project
/// with specified name.
/// </summary>
/// <param name="project">Project object</param>
/// <param name="taskName">task name</param>
/// <returns></returns>
/// <exception cref="ArgumentException">Exception throws when the task name
/// is empty; when the task name is longer than 40 symbols and when in starts from a digit.</exception>
public EpicTask CreateEpicTaskInProject(Project project, string taskName)
{
if (!TaskManager.IsProjectNameCorrect(taskName))
{
throw new ArgumentException("Task name is too long or starts with a digit.");
}
var nextId = project.Tasks.Select(task => task.Id).Prepend(0).Max() + 1;
var epicTask = new EpicTask
{
Id = nextId,
Name = taskName,
StoryTasks = new List <StoryTask>(),
SimpleTasks = new List <SimpleTask>(),
CreationDate = DateTime.Now
};
project.Tasks.Add(epicTask);
return(epicTask);
}
