SwiftUI ContentView with Password Validation

SwiftUI ContentView with Password Validation.swift

struct ContentView: View {
  @State private var password: String = ""
  @State private var isPasswordValid: Bool = true
  @State private var passwordValidationMessage: String = ""
  
  var body: some View {
    VStack(spacing: 20) {
      SecureField("Enter Password", text: $password)
        .padding()
        .textFieldStyle(RoundedBorderTextFieldStyle())
      
      if !isPasswordValid {
        Text(passwordValidationMessage)
          .foregroundColor(.red)
          .padding(.top, 5)
      }
      
      Button("Submit") {
        if validatePassword(password) {
          print("Password is valid")
          isPasswordValid = true
        } else {
          isPasswordValid = false
          print("\(passwordValidationMessage)")
        }
      }
      .padding()
      .background(isPasswordValid ? Color.blue : Color.gray)
      .foregroundColor(.white)
      .cornerRadius(10)
    }
    .padding()
  }
  
  @MainActor
  func validatePassword(_ password: String) -> Bool {
    var validationMessages: [String] = []
    
    // Validate password length
    if password.count < 6 {
      validationMessages.append("Password must be at least 6 characters long.")
    }
    
    // Validate uppercase letter
    if !password.contains(where: { $0.isUppercase }) {
      validationMessages.append("Password must contain at least one uppercase letter.")
    }
    
    // Validate lowercase letter
    if !password.contains(where: { $0.isLowercase }) {
      validationMessages.append("Password must contain at least one lowercase letter.")
    }
    
    // Validate digit
    if !password.contains(where: { $0.isNumber }) {
      validationMessages.append("Password must contain at least one number.")
    }
    
    // Validate special character
    let specialCharacterSet = "!@#$%^&*()_+=-[]{}|;:'\",.<>?/~"
    if !password.contains(where: { specialCharacterSet.contains($0) }) {
      validationMessages.append("Password must contain at least one special character.")
    }
    
    // If there are validation messages, set the validation feedback and return false
    if !validationMessages.isEmpty {
      passwordValidationMessage = validationMessages.joined(separator: "\n")
      return false
    }
    
    return true
  }

}

struct ContentView_Previews: PreviewProvider {
  static var previews: some View {
    ContentView()
  }
}