basic.ts (5-114)
- import statements @5
- Config @11 # Configuration interface for authentication service.
   interface Config {
     …
- AuthService @19 # Service for handling user authentication and authorization.
  - constructor (config: Config) @26 # Constructs a new AuthService instance.
     constructor(config: Config) {
       this.apiKey = config.apiKey;
       this.users = new Map();
  - login (username: string, password: string) : Promise<User | null> @34 [async] # Authenticates a user with username and password.
     …
       return null;
  - logout (userId: string) : Promise<void> @42 [async] # Logs out a user by their ID.
  - validateToken (token: string) : boolean @49 # Validates an authentication token.
     validateToken(token: string): boolean {
       return token.length > 0;
- UserManager @57 # Manager class for user CRUD operations.
  - constructor (database: Database) @60
     constructor(database: Database) {
       this.db = database;
  - createUser (username: string, email: string) : Promise<User> @67 [async] # Creates a new user in the system.
     …
       const user: User = {
       …
       return user;
  - getUser (id: string) : Promise<User | null> @80 [async] # Retrieves a user by their ID.
     …
       return null;
  - updateUser (id: string, data: Partial<User>) : Promise<User> @87 [async] # Updates a user's information.
     …
       return {} as User;
- generateId () : string @95 # Generates a random unique identifier.
   function generateId(): string {
     return Math.random().toString(36).substr(2, 9);
- validateEmail (email: string) : boolean @102 # Validates an email address format.
   function validateEmail(email: string): boolean {
     return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email);
- calculateStats (users: User[]) : { total: number; active: number } @109 # Arrow function to calculate statistics.
   const calculateStats = (users: User[]): { total: number; active: number } => {
     return {
       …
       active: users.filter(u => u.isActive).length,
