SergeyPetrachkov

protocol ChatsService {
  func getChats(request: GetConversationsRequest) throws -> [Message]
  func getChatMessages(request: GetConversationMessagesRequest) throws -> [Message]
  func submitMessage(request: SubmitMessageRequest) throws -> Message
  func getUnreadMessagesNumber() throws -> Int
}

SergeyPetrachkov

extension String {
  public var initials: String {
    var finalString = String()
    var words = components(separatedBy: .whitespacesAndNewlines)
    
    if let firstCharacter = words.first?.first {
      finalString.append(String(firstCharacter))
      words.removeFirst()
    }
    

SergeyPetrachkov

extension UIImage {
  static func roundedTextAvatar(text: String?,
                        color: UIColor,
                        circular: Bool,
                        textAttributes: [NSAttributedStringKey: Any]?,
                        size: CGSize) -> UIImage? {
    
    let scale = Float(UIScreen.main.scale)
    UIGraphicsBeginImageContextWithOptions(size, false, CGFloat(scale))
    let context = UIGraphicsGetCurrentContext()

SergeyPetrachkov

public protocol Copyable {
  init(other: Self)
}

public extension Copyable {
  public func copy() -> Self {
    return Self.init(other: self)
  }
}