basic.swift (3-117)
- import statements @3
- Config @7 # Configuration structure for the application
   struct Config {
       let host: String
       let port: Int
       …
  - host : String @8
  - port : Int @9
  - isEnabled : Bool @10
- Logger @14 # Protocol for logging operations
   …
       func log(message: String)
       …
       func logError(_ error: Error)
  - log (message: String) @16 # Log a message
  - logError (_ error: Error) @19 # Log an error
- UserStatus : String @23 # Enum representing user status
  - active @24
  - inactive @25
  - pending @26
  - displayName : String @29 # Get display name for status
     …
         switch self {
         case .active: return "Active"
         case .inactive: return "Inactive"
         case .pending: return "Pending"
- DatabaseManager @39 [public] # Database manager class for handling connections
  - connectionString : String @40 [private]
  - isConnected : Bool @41 [private]
  - init (connectionString: String) @44 [public] # Initialize with connection string
     public init(connectionString: String) {
         self.connectionString = connectionString
  - connect () throws @49 [public] # Connect to the database
     public func connect() throws {
         print("Connecting to database")
         isConnected = true
  - disconnect () @55 [public] # Disconnect from database
     public func disconnect() {
         if isConnected {
       …
  - query (_ sql: String) async throws -> @63 [public] # Query the database with SQL
     public func query(_ sql: String) async throws -> [[String: Any]] {
         return []
- DatabaseManager : Logger @69 # Extension adding logging capability to DatabaseManager
  - log (message: String) @70
     func log(message: String) {
         print("[DB] \(message)")
  - logError (_ error: Error) @74
     func logError(_ error: Error) {
         print("[DB ERROR] \(error.localizedDescription)")
- UserService @80 # User service for handling user operations
  - db : DatabaseManager @81 [private]
  - init (db: DatabaseManager) @83
     init(db: DatabaseManager) {
         self.db = db
  - createUser (username: String, email: String) -> Int @88 # Create a new user
     func createUser(username: String, email: String) -> Int {
         return 1
  - getUser (by id: Int) -> [String: Any]? @93 # Get user by ID
     func getUser(by id: Int) -> [String: Any]? {
         return nil
  - deleteUser (id: Int) throws @98 # Delete user by ID
     func deleteUser(id: Int) throws {
         …
- validateEmail (_ email: String) -> Bool @104 # Validate email format
   func validateEmail(_ email: String) -> Bool {
       return email.contains("@") && email.count > 3
- formatTimestamp (_ date: Date) -> String @109 # Format a timestamp to string
   func formatTimestamp(_ date: Date) -> String {
       let formatter = DateFormatter()
       formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
       return formatter.string(from: date)
- UserID = Int @116 # Typealias for convenience
- CompletionHandler = (Result<Bool, Error>) -> Void @117
