private static long downloadFromNetworkHelper()

in LeanbackShowcase/app/src/main/java/androidx/leanback/leanbackshowcase/app/room/network/NetworkManagerUtil.java [85:157]
58 lines of code
9 McCabe index (conditional complexity)

    private static long downloadFromNetworkHelper(long videoId, String downloadingUrl,
                                                  String category) {

        // Currently we only support downloading for the following format.
        String[] allowedTypes = {"png", "jpg", "jpeg", "gif", "webp", "mp4"};

        // Extract the suffix and test if the suffix satisfies our requirement.
        String suffix = downloadingUrl.substring(
                downloadingUrl.lastIndexOf(SUFFIX_SEPARATOR) + 1).toLowerCase();
        if (!Arrays.asList(allowedTypes).contains(suffix)) {
            if (DEBUG) {
                Log.e(TAG, "Unsupported file type, cannot download");
            }
            return 0L;
        }

        DownloadManager.Request request;
        try {
            request = new DownloadManager.Request(Uri.parse(downloadingUrl));
        } catch (IllegalArgumentException e) {
            if (DEBUG) {
                Log.e(TAG, "Cannot get request object from download manager");
            }
            return 0L;
        }

        request.setAllowedNetworkTypes(
                DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI);
        request.allowScanningByMediaScanner();
        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);

        String mediaName;

        // Configure request and media storage name according to resource category
        switch (category) {
            case VIDEO:
                request.setTitle(DOWNLOAD_VIDEO);
                request.setDescription(DOWNLOAD_SELECTED_VIDEO);
                mediaName = VIDEO;

                break;
            case BACKGROUND:
                request.setTitle(DOWNLOAD_BACKGROUND_IMAGE);
                request.setDescription(DOWNLOADING_BACKGROUND_IMAGE_FILE);
                mediaName = BACKGROUND;
                break;
            case CARD:
                request.setTitle(DOWNLOAD_CARD_IMAGE);
                request.setDescription(DOWNLOADING_CARD_IMAGE_FILE);
                mediaName = CARD;
                break;
            default:
                if (DEBUG) {
                    Log.d(TAG, "Not valid resource category");
                }
                return 0L;
        }

        // Set downloading location and file name.
        request.setDestinationInExternalPublicDir(
                Environment.DIRECTORY_DOWNLOADS
                        + File.separator
                        + mediaName,
                mediaName + videoId + SUFFIX_SEPARATOR + suffix);

        // submit the downloading task to download manager.
        final DownloadManager dm =
                (DownloadManager) SampleApplication.getInstance().getSystemService(
                        Context.DOWNLOAD_SERVICE);
        final long DownloadManagerGeneratedId = dm.enqueue(request);

        return DownloadManagerGeneratedId;
    }