Runner.swift

Runner.swift

var body: some View {
  VStack {
    ...
  }
  .frame(maxWidth: .infinity, maxHeight: .infinity)
    // We need to start our runner within the body
    // So we are able to update our immutable view attributes 
    .onAppear(perform: self.run)
  }     
}
// This is our runner that updates our view and kicks off new calculations
private func run() {
  // For the current state of our POC,
  // let's update once per second
  Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { _ in
      // First let's get a new capturing of the poker table
      guard let canvas = Canvas() else {
        // MARK: - TODO, Handle appropriatly
        return
      }
  
      // The image to display for us so we see what's going on                                  
      self.image = canvas.image
      // The CGImage we want to use for further calculations                                                      
      self.screenshot = canvas.screenshot
      self.setWholeCards(in: self.screenshot!)
      self.findDealer(in: self.screenshot!)
  }
}

// We're using the screenshot to now analyze the table
private func setWholeCards(in frame: CGImage) {
  // We're getting our left card.
  // We're passing our hard-coded coordinates of the face and the suite.
  // The face is the letter/number of our hole card.
  // For example A/K/T/9/7/6/etc
  // The suite is the picture of the card
  // For example diamond or heart
  // getLeftWholeCardFace and getLeftWholeCardSuite 
  // once again each just return hard-coded CGRects
  getCard(
    face: Rect.getLeftWholeCardFace(in: frame), 
    suite: Rect.getLeftWholeCardSuite(in: frame)) { (face, suite) in
      // Once we have the face and the suite, we'll attach it to our game model
      // I'll show the game model in a minute
      game.setLeftWholeCard(face, suite)
  }
  // Repeat for the right card
  getCard(
    face: Rect.getRightWholeCardFace(in: frame),
    suite: Rect.getRightWholeCardSuite(in: frame)) { (face, suite) in
      // Same as above
      ...                                     
  }
}

// Type alias for better readability
typealias CardCompletion = ((face: String, suite: String)) -> Void
// This function wraps the getFace and getSuite method to provide a simple API
private func getCard(face facePosition: CGRect,
                     suite suitePosition: CGRect,
                     onCompletion: @escaping CardCompletion) {
  // getFace and getSuite will be explained shortly
  getFace(at: facePosition) { face in
    getSuite(at: suitePosition) { suite in
      onCompletion((face, suite))
    }
  }
}