public string ComputeDataSubscriptionStatus()

in DeviceBridge/Services/SubscriptionScheduler.cs [111:139]
22 lines of code
10 McCabe index (conditional complexity)

        public string ComputeDataSubscriptionStatus(string deviceId, DeviceSubscriptionType subscriptionType, string callbackUrl)
        {
            // If the callback URL in storage does not match the one currently registered in the client, we can assume that the engine
            // is still trying to synchronize this subscription (either it was just created or it's being initialized at startup).
            if ((subscriptionType == DeviceSubscriptionType.DesiredProperties && _connectionManager.GetCurrentDesiredPropertyUpdateCallbackId(deviceId) != callbackUrl) ||
                (subscriptionType == DeviceSubscriptionType.Methods && _connectionManager.GetCurrentMethodCallbackId(deviceId) != callbackUrl) ||
                (subscriptionType == DeviceSubscriptionType.C2DMessages && _connectionManager.GetCurrentMessageCallbackId(deviceId) != callbackUrl))
            {
                return SubscriptionStatusStarting;
            }

            var deviceStatus = _connectionManager.GetDeviceStatus(deviceId);

            if (deviceStatus?.status == ConnectionStatus.Connected)
            {
                // Device is connected and callback is registered, so the subscription is running.
                return SubscriptionStatusRunning;
            }
            else if (deviceStatus?.status == ConnectionStatus.Disconnected || deviceStatus?.status == ConnectionStatus.Disabled)
            {
                // Callbacks match, but the device is disconnected and the SDK won't automatically retry, so the subscription is permanently stopped.
                return SubscriptionStatusStopped;
            }
            else
            {
                // If the device is not explicitly connected or disconnected, we can assume that the SDK is retrying or a client is being created.
                return SubscriptionStatusStarting;
            }
        }