func handleConnectViaCert()

in IoT-Sample/Swift/IoTSampleSwift/ConnectionViewController.swift [113:142]
27 lines of code
3 McCabe index (conditional complexity)

    func handleConnectViaCert() {
        self.connectIoTDataWebSocket.isHidden = true
        activityIndicatorView.startAnimating()
        
        let defaults = UserDefaults.standard
        let certificateId = defaults.string( forKey: "certificateId")
        if (certificateId == nil) {
            DispatchQueue.main.async {
                self.logTextView.text = "No identity available, searching bundle..."
            }
            let certificateIdInBundle = searchForExistingCertificateIdInBundle()
            
            if (certificateIdInBundle == nil) {
                DispatchQueue.main.async {
                    self.logTextView.text = "No identity found in bundle, creating one..."
                }
                createCertificateIdAndStoreinNSUserDefaults(onSuccess: {generatedCertificateId in
                    let uuid = UUID().uuidString
                    self.logTextView.text = "Using certificate: \(generatedCertificateId)"
                    self.iotDataManager.connect( withClientId: uuid, cleanSession:true, certificateId:generatedCertificateId, statusCallback: self.mqttEventCallback)
                }, onFailure: {error in
                    print("Received error: \(error)")
                })
            }
        } else {
            let uuid = UUID().uuidString;
            // Connect to the AWS IoT data plane service w/ certificate
            iotDataManager.connect( withClientId: uuid, cleanSession:true, certificateId:certificateId!, statusCallback: self.mqttEventCallback)
        }
    }