class Book {
public:Book(int id, string det): _bookId(id), _details(det) {}int getID() { return _bookId; }void setId(int id) { _bookId = id; }string getDetails() { return _details; }void setDetails(string d) { _details = d; }private:int _bookId;string _details;
};class User {
public:User(int id, string details, int accountType): _userId(id), _details(details), _accountType(accountType) {}void renewMembership() {}int getID() { return _userId; }void setID(int id) { _userId = id; }string getDetails() { return _details; }void setDetails(string details) { _details = details; }int getAccountType() { return _accountType; }void setAccountType(int t) { _accountType = t; }private:int _userId;string _details;int _accountType;
};class Library {
public:Library() {}Book* addBook(int id, string details) {if (_books.find(id) == _books.end()) return nullptr;Book *book = new Book(id, details);_books[id] = book;return book;}bool remove(Book *b) { return remove(b->getID()); }bool remove(int id) {if (_books.find(id) == _books.end()) return false;_books.erase(id);return true;}Book* find(int id) {if (_books.find(id) == _books.end()) return nullptr;return _books[id];}private:unordered_map<int, Book*> _books;
};class UserManager {
public:UserManager() {}User* addUser(int id, string details, int accountType) {if (_users.find(id) == _users.end()) return nullptr;User *user = new User(id, details, accountType);_users[id] = user;return user;}bool remove(User *u) { return remove(u->getID()); }bool remove(int id) {if (_users.find(id) == _users.end()) return false;_users.erase(id);return true;}User* find(int id) {if (_users.find(id) == _users.end()) return nullptr;return _users[id];}private:unordered_map<int, User*> _users;
};class Display {
public:Display() {}void displayUser(User *user) {_activeUser = user;refreshUsername();}void displayBook(Book *book) {_pageNumber = 0;_activeBook = book;refreshTitle();refreshDetails();refreshPage();}void turnPageForward() {++_pageNumber;refreshPage();}void turnPageBackward() {--_pageNumber;refreshPage();}void refreshUsername() {} // ...void refreshTitle() {} // ...void refreshDetails() {} // ...void refreshPage() {} // ...private:Book *_activeBook;User *_activeUser;int _pageNumber = 0;
};class OnlineReaderSystem {
public:OnlineReader() {_userManager = new UserManager();_library = new Library();_display = new Display();}Library* getLibrary() { return _library; }UserManager* getUserManager() { return _userManager; }Display* getDisplay() { return _display; }Book* getActiveBook() { return _activeBook; }void setActiveBook(Book *book) {_activeBook = book;_display->displayBook(book);}User* getActiveUser() { return _activeUser; }void setActiveUser(User *user) {_activeUser = user;_display->displayUser(user);}private:Library *_library;UserManager *_userManager;Display *_display;Book *_activeBook;User *_activeUser;
};