gistfile1.swift

enum CameraConnectionResult {
    case Success(CameraType)
    case Failure(NSError) // Really don't want this to be Optional<NSError>
}

class CameraClient {
    class func connect(completion: CameraConnectionResult -> ()) {
        let URL = NSURL(string: "http://10.5.5.9:8080/videos/MISC/version.txt")
        if let versionURL = URL {
            let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
            let URLSession = NSURLSession(configuration: configuration)
            URLSession.dataTaskWithURL(versionURL) { data, response, error in
                if (data != nil) {
                    // NSErrors may be nil if an error did not occur
                    var JSONError: NSError?
                    if let JSON: AnyObject = NSJSONSerialization.JSONObjectWithData(data, options: nil, error: &JSONError) {
                        if let cameraTypeString = JSON["camera type"] as? String {
                            let cameraType = CameraType(cameraTypeString)
                            completion(CameraConnectionResult.Success(cameraType))
                        }
                    } else {
                        // Get an error here about the type mismatch. Is it acceptable to force unwrap? i.e. .Failure(JSONError!)
                        completion(CameraConnectionResult.Failure(JSONError))
                    }
                } else {
                    completion(CameraConnectionResult.Failure(error))
                }
            }.resume()
        }
    }
}