public async Task <DownloadResult> DownloadMusicAsync(MHzSongBase song, bool not_show = false, bool show_start = true, bool show_succ_notif = true, bool show_fail_notif = true)
{
var file = default(StorageFile);
try {
var folder = await GetBeansproutMusicFolderAsync();
var filename = MHzSongBaseHelper.GetIdentity(song) + StorageHelper.MusicTemporaryExtension;
file = await CreateFileInMusicFolderWithNameAsync(folder, filename);
var fail_toast = ToastHelper.CreateToastNotificaion(
title: GetUIString("Download_Failed") + " : " + song.Title,
content: DateTime.Now.ToString("h:mm tt"),
imageUri: " -- ",
uri: " -- ",
logoOverride: song.Picture,
voice: "ms-appx:///Voice/yellsedtsr.mp3");
var succeed_toast = ToastHelper.CreateToastNotificaion(
title: GetUIString("Download_Succeed") + " : " + song.Title,
content: DateTime.Now.ToString("h:mm tt"),
imageUri: " -- ",
uri: " -- ",
logoOverride: song.Picture,
voice: "ms-appx:///Voice/haizi.mp3");
var group = BackgroundTransferGroup.CreateGroup(DoubanMusicGroup);
group.TransferBehavior = BackgroundTransferBehavior.Serialized;
var downloader = new BackgroundDownloader {
FailureToastNotification = show_succ_notif ? new Windows.UI.Notifications.ToastNotification(fail_toast) : null,
SuccessToastNotification = show_fail_notif ? new Windows.UI.Notifications.ToastNotification(succeed_toast) : null,
TransferGroup = group,
};
var succeed_trans = Uri.TryCreate(song.Url, UriKind.Absolute, out var do_url);
if (!succeed_trans)
{
throw new DownloadCanNotRunException();
}
var operation = downloader.CreateDownload(do_url, file);
operation.CostPolicy = BackgroundTransferCostPolicy.UnrestrictedOnly;
if (show_start)
{
ReportHelper.ReportAttentionAsync(GetUIString("Download_Start"));
}
if (!not_show)
{
DownloadListAddNewItem(song, operation);
operation = await operation.StartAsync();
}
else
{
var control = await operation.StartAsync();
}
var mess_succeed = await CreateBJSONMessageAsync(song, folder, file.Path);
if (!mess_succeed)
{
throw new JSONCanNotCreateException();
}
await file.RenameAsync(filename.Replace(StorageHelper.MusicTemporaryExtension, StorageHelper.MusicExtension), NameCollisionOption.ReplaceExisting);
return(DownloadResult.Successfully);
} catch (JSONCanNotCreateException) {
await file.DeleteAsync();
return(DownloadResult.Failed);
} catch (DownloadCanNotRunException) {
await file.DeleteAsync();
return(DownloadResult.Failed);
} catch (FileCannNotCreateException) {
return(DownloadResult.Failed);
} catch (FileExistException) {
return(DownloadResult.FileExist);
} catch (Exception e) {
Debug.WriteLine(e.Message);
return(DownloadResult.Failed);
}
}