void handleTableActionMore(UITableViewRowAction action, NSIndexPath indexPath)
{
activeAsset = saved ? savedAssets [indexPath.Row] : allAssets [indexPath.Row];
Log.Debug($"More: {activeAsset?.Music?.DisplayName}");
var alertController = UIAlertController.Create(activeAsset.Music.DisplayName, null, UIAlertControllerStyle.ActionSheet);
var downloadState = AssetPersistenceManager.Shared.DownloadState(activeAsset);
alertController.AddAction(UIAlertAction.Create("Share", UIAlertActionStyle.Default, handleAlertControllerActionShare));
switch (downloadState)
{
case MusicAssetDownloadState.NotDownloaded:
alertController.AddAction(UIAlertAction.Create("Download", UIAlertActionStyle.Default, handleAlertControllerActionDownload));
break;
case MusicAssetDownloadState.Downloading:
alertController.AddAction(UIAlertAction.Create("Cancel", UIAlertActionStyle.Destructive, handleAlertControllerActionCancel));
break;
case MusicAssetDownloadState.Downloaded:
alertController.AddAction(UIAlertAction.Create("Delete", UIAlertActionStyle.Destructive, handleAlertControllerActionDelete));
break;
}
alertController.AddAction(UIAlertAction.Create("Cancel", UIAlertActionStyle.Cancel, handleAlertControllerActionDismiss));
PresentViewController(alertController, true, null);
}
public void MockDownloadAsset(MusicAsset asset)
{
mockDownloadAsset = asset;
AssetDownloadStateChanged?.Invoke(this, new MusicAssetDownloadStateChangeArgs(asset.Music, MusicAssetDownloadState.Downloading));
var rand = new Random();
double progress = 0;
Task.Run(async() =>
{
while (progress <= 1)
{
await Task.Delay(TimeSpan.FromSeconds(1));
AssetDownloadProgressChanged?.Invoke(this, new MusicAssetDownloadProgressChangeArgs(asset.Music, progress));
double inc = (double)rand.Next(1, 15) / 100;
progress += inc;
}
await Task.Delay(TimeSpan.FromSeconds(1));
mockDownloadAsset = null;
AssetDownloadProgressChanged?.Invoke(this, new MusicAssetDownloadProgressChangeArgs(asset.Music, 1));
AssetDownloadStateChanged?.Invoke(this, new MusicAssetDownloadStateChangeArgs(asset.Music, MusicAssetDownloadState.Downloaded));
});
}
/// Restores the Application state by getting all the AVAssetDownloadTasks and restoring their Asset structs.
public async Task RestorePersistenceManagerAsync(List <AvContent> music)
{
if (baseDownloadURL == null)
{
throw new InvalidOperationException("must call Setup() before anything else");
}
if (didRestorePersistenceManager)
{
return;
}
didRestorePersistenceManager = true;
// Grab all the tasks associated with the assetDownloadURLSession
var tasks = await assetDownloadURLSession.GetAllTasksAsync();
// For each task, restore the state in the app by recreating Asset structs and reusing existing AVURLAsset objects.
foreach (var task in tasks)
{
if (task is AVAssetDownloadTask assetDownloadTask)
{
var song = music.FirstOrDefault(s => s.Id == assetDownloadTask.TaskDescription);
if (song != null)
{
var asset = new MusicAsset(song, assetDownloadTask.UrlAsset);
activeDownloadsMap [assetDownloadTask] = asset;
}
}
}
DidRestore?.Invoke(this, EventArgs.Empty);
}
/// Cancels an AVAssetDownloadTask given an Asset.
public void CancelDownload(MusicAsset asset)
{
foreach (var item in activeDownloadsMap)
{
if (asset == item.Value)
{
item.Key.Cancel();
}
}
}
/// Deletes an Asset on disk if possible.
public void DeleteAsset(MusicAsset asset)
{
var localPath = localFilePath(asset.Id);
// Check if there is a file URL stored for this asset.
if (localPath != null)
{
NSFileManager.DefaultManager.Remove(localPath, out NSError error);
if (error != null)
{
Log.Debug($"An error occured trying to delete the contents on disk for {asset.Id}: {error.LocalizedDescription}");
}
Settings.SetSetting(asset.Id, string.Empty);
AssetDownloadStateChanged?.Invoke(this, new MusicAssetDownloadStateChangeArgs(asset.Music, MusicAssetDownloadState.NotDownloaded));
}
}
/// Triggers the initial AVAssetDownloadTask for a given Asset.
public void DownloadAsset(MusicAsset asset)
{
Track.Download(asset.Music);
// For the initial download, we ask the URLSession for an AVAssetDownloadTask
// with a minimum bitrate corresponding with one of the lower bitrate variants in the asset.
var taskOptions = new AVAssetDownloadOptions {
MinimumRequiredMediaBitrate = 265000
};
var task = assetDownloadURLSession.GetAssetDownloadTask(asset.UrlAsset, asset.Id, null, taskOptions);
// To better track the AVAssetDownloadTask we set the taskDescription to something unique for our sample.
task.TaskDescription = asset.Id;
activeDownloadsMap [task] = asset;
task.Resume();
AssetDownloadStateChanged?.Invoke(this, new MusicAssetDownloadStateChangeArgs(asset.Music, MusicAssetDownloadState.Downloading));
}
/// Triggers the initial AVAssetDownloadTask for a given Asset.
public void DownloadAsset(MusicAsset asset)
{
// For the initial download, we ask the URLSession for an AVAssetDownloadTask
// with a minimum bitrate corresponding with one of the lower bitrate variants
// in the asset.
// TODO: workaround for bug https://bugzilla.xamarin.com/show_bug.cgi?id=44201 to get it to build in Mobile Center
var taskOptions = new NSDictionary(new NSString("AVAssetDownloadTaskMinimumRequiredMediaBitrateKey"), new NSNumber(265000));
// should be this
// var taskOptions = new AVAssetDownloadOptions { MinimumRequiredMediaBitrate = 265000 };
var task = assetDownloadURLSession.GetAssetDownloadTask(asset.UrlAsset, asset.Id, null, taskOptions);
// To better track the AVAssetDownloadTask we set the taskDescription to something unique for our sample.
task.TaskDescription = asset.Id;
activeDownloadsMap [task] = asset;
task.Resume();
AssetDownloadStateChanged?.Invoke(this, new MusicAssetDownloadStateChangeArgs(asset.Music, MusicAssetDownloadState.Downloading));
}
/// Returns the current download state for a given Asset.
public MusicAssetDownloadState DownloadState(MusicAsset asset)
{
#if DEBUG
if (mockDownloadAsset == asset)
{
return(MusicAssetDownloadState.Downloading);
}
#endif
var localPath = localFilePath(asset.Id);
// Check if there is a file URL stored for this asset.
if (localPath != null)
{
// Check if the file exists on disk
if (localPath.Path == baseDownloadURL.Path)
{
return(MusicAssetDownloadState.NotDownloaded);
}
if (NSFileManager.DefaultManager.FileExists(localPath.Path))
{
return(MusicAssetDownloadState.Downloaded);
}
}
// Check if there are any active downloads in flight.
foreach (var item in activeDownloadsMap)
{
if (item.Value.Id == asset.Id)
{
return(MusicAssetDownloadState.Downloading);
}
}
return(MusicAssetDownloadState.NotDownloaded);
}
public bool TogglePlayback(MusicAsset asset)
{
if (asset == null)
{
Asset = null;
return(false);
}
if (Asset != asset)
{
Asset = asset;
return(true);
}
if (Asset == asset && readyForPlayback)
{
if (Player?.Rate == 0)
{
Player.Play();
updateCommandCenterNowPlayingInfo();
return(true);
}
if (Player?.Rate == 1)
{
Player.Pause();
updateCommandCenterNowPlayingInfo();
return(false);
}
}
return(false);
}