Domain model

Main Classes

• Learner
  • Properties: ID(int), Name(string), Associated courses (List[number of courses(int), course(class), progress of course(int)])
• Course
  • Properties: ID(int), Name(string), Topics (List of Topics)
• Topic
  • Properties: ID(int), Name(string), Modules (Liste of Modules)
• Module
  • Properties: ID(int), IsCompleted(boolean), ModuleItems(list of Type(class))

Sub-classes

ModuleItems:

• Quiz
  • Properties: ID(int), Name(string), Question(string), Answer(string), dueTime(dateTime), Result(int), isCompleted(bool)
• Dictionary
  • Properties: ID(int), Vocabulary(list of words), Meaning(string), ExampleSentence(string), IsLearned(bool)
• Note
  • Properties: ID(int), Name(string), Content(string), Tags(List of strings), CreatedDate(dateTime), ModifiedDate(dateTime)

(I assumed that a course has one or more topics divided into one or more modules. These modules have different types of items like quizzes, dictionaries, content, and associated notes.)

• DataStore
  • Methods: SaveData(), LoadData()
• NoteManager, CourseManager, QuizManager, VocabularyManager
  • Each is responsible for adding, editing, deleting, and searching their entity.