todo

type IBiz interface {
	// GetByID serve caller to given task's id to get a task
	GetByID(ctx contextx.Contextx, id string) (task *todo.Task, err error)

	// List serve caller to list all tasks
	List(ctx contextx.Contextx, start, end int) (tasks []*todo.Task, total int, err error)

	// Create serve caller to create a task
	Create(ctx contextx.Contextx, title string) (task *todo.Task, err error)

	// UpdateStatus serve caller to update the task's status by id
	UpdateStatus(ctx contextx.Contextx, id string, status bool) (task *todo.Task, err error)

	// ChangeTitle serve caller to change the task's title by id
	ChangeTitle(ctx contextx.Contextx, id string, title string) (task *todo.Task, err error)

	// Delete serve caller to given task's id to delete the task
	Delete(ctx contextx.Contextx, id string) error
}