/// <summary>
/// Add folder to Library asynchronously.
/// </summary>
/// <param name="queryResult">The query result after querying in a specific folder.</param>
/// <returns></returns>
public async Task AddFolderToLibraryAsync(StorageFileQueryResult queryResult)
{
if (queryResult != null)
{
//so that no new event is raised. We want to focus on loading.
isLibraryLoading = true;
//this is a temporary list to collect all the processed Mediafiles. We use List because it is fast. Faster than using ObservableCollection directly because of the events firing on every add.
var tempList = new List <Mediafile>();
//'count' is for total files got after querying.
var count = await queryResult.GetItemCountAsync().AsTask().ConfigureAwait(false);
if (count == 0)
{
string error = "No songs found!";
BLogger.Logger.Error("No songs were found!");
await NotificationManager.ShowMessageAsync(error);
return;
}
AlbumArtistViewModel model = new AlbumArtistViewModel();
LibraryService service = new LibraryService(new DatabaseService());
int failedCount = 0;
//'i' is a variable for the index of currently processing file
short i = 0;
try
{
foreach (StorageFile file in await queryResult.GetFilesAsync().AsTask().ConfigureAwait(false))
{
try
{
//A null Mediafile which we will use afterwards.
Mediafile mp3file = null;
i++; //Notice here that we are increasing the 'i' variable by one for each file.
//we send a message to anyone listening relaying that song count has to be updated.
Messenger.Instance.NotifyColleagues(MessageTypes.MSG_UPDATE_SONG_COUNT, i);
await Task.Run(async() =>
{
//here we load into 'mp3file' variable our processed Song. This is a long process, loading all the properties and the album art.
mp3file = await CreateMediafile(file, false); //the core of the whole method.
mp3file.FolderPath = Path.GetDirectoryName(file.Path);
await SaveSingleFileAlbumArtAsync(mp3file).ConfigureAwait(false);
});
//this methods notifies the Player that one song is loaded. We use both 'count' and 'i' variable here to report current progress.
await NotificationManager.ShowMessageAsync(i.ToString() + "\\" + count.ToString() + " Song(s) Loaded");
//we then add the processed song into 'tempList' very silently without anyone noticing and hence, efficiently.
tempList.Add(mp3file);
}
catch (Exception ex)
{
BLogger.Logger.Error("Loading of a song in folder failed.", ex);
//we catch and report any exception without distrubing the 'foreach flow'.
await NotificationManager.ShowMessageAsync(ex.Message + " || Occured on: " + file.Path);
failedCount++;
}
}
BLogger.Logger.Info(string.Format("{0} out of {1} songs loaded. {2} is iteration count.", tempList.Count, count, i));
}
catch (Exception ex)
{
BLogger.Logger.Error("Failed to import songs in library.", ex);
string message1 = ex.Message + "||" + ex.InnerException;
await NotificationManager.ShowMessageAsync(message1);
}
//now we add 100 songs directly into our TracksCollection which is an ObservableCollection. This is faster because only one event is invoked.
tempList.Sort();
TracksCollection.AddRange(tempList);
//now we load 100 songs into database.
service.AddMediafiles(tempList);
Messenger.Instance.NotifyColleagues(MessageTypes.MSG_ADD_ALBUMS, tempList);
Messenger.Instance.NotifyColleagues(MessageTypes.MSG_UPDATE_SONG_COUNT, "Done!");
//we send the message to load the album. This comes first so there is enough time to load all albums before new list come up.
isLibraryLoading = false;
string message = string.Format("Songs successfully imported! Total Songs: {0}; Failed: {1}; Loaded: {2}", count, failedCount, i);
BLogger.Logger.Info(message);
await NotificationManager.ShowMessageAsync(message);
service.Dispose();
model = null;
await DeleteDuplicates(tempList).ConfigureAwait(false);
tempList.Clear();
}
}
/// <summary>
/// Add folder to Library asynchronously.
/// </summary>
/// <param name="queryResult">The query result after querying in a specific folder.</param>
/// <returns></returns>
public static async Task AddFolderToLibraryAsync(StorageFileQueryResult queryResult)
{
if (queryResult != null)
{
var stop = Stopwatch.StartNew();
//we create two uints. 'index' for the index of current block/batch of files and 'stepSize' for the size of the block. This optimizes the loading operation tremendously.
uint index = 0, stepSize = 200;
//a list containing the files we recieved after querying using the two uints we created above.
IReadOnlyList <StorageFile> files = await queryResult.GetFilesAsync(index, stepSize);
//we move forward the index 100 steps because first 100 files are loaded when we called the above method.
index += 200;
//this is a temporary list to collect all the processed Mediafiles. We use List because it is fast. Faster than using ObservableCollection directly because of the events firing on every add.
var tempList = new List <Mediafile>();
//'count' is for total files got after querying.
var count = await queryResult.GetItemCountAsync();
if (count == 0)
{
string error = "No songs found!";
await NotificationManager.ShowAsync(error);
return;
}
AlbumArtistViewModel model = new AlbumArtistViewModel();
LibraryService service = new LibraryService(new DatabaseService());
int failedCount = 0;
//'i' is a variable for the index of currently processing file
short i = 0;
//using while loop until number of files become 0. This is to confirm that we process all files without leaving anything out.
while (files.Count != 0)
{
try
{
foreach (StorageFile file in files)
{
try
{
//we use 'if' conditional so that we don't add any duplicates
if (TracksCollection.Elements.All(t => t.Path != file.Path))
{
//A null Mediafile which we will use afterwards.
Mediafile mp3file = null;
i++; //Notice here that we are increasing the 'i' variable by one for each file.
//we send a message to anyone listening relaying that song count has to be updated.
Messenger.Instance.NotifyColleagues(MessageTypes.MSG_UPDATE_SONG_COUNT, i);
await Task.Run(async() =>
{
//here we load into 'mp3file' variable our processed Song. This is a long process, loading all the properties and the album art.
mp3file = await CreateMediafile(file, false); //the core of the whole method.
mp3file.FolderPath = Path.GetDirectoryName(file.Path);
await SaveSingleFileAlbumArtAsync(mp3file).ConfigureAwait(false);
});
//this methods notifies the Player that one song is loaded. We use both 'count' and 'i' variable here to report current progress.
await NotificationManager.ShowAsync(i.ToString() + "\\" + count.ToString() + " Song(s) Loaded", "Loading...");
//we then add the processed song into 'tempList' very silently without anyone noticing and hence, efficiently.
tempList.Add(mp3file);
}
}
catch (Exception ex)
{
//we catch and report any exception without distrubing the 'foreach flow'.
await NotificationManager.ShowAsync(ex.Message + " || Occured on: " + file.Path);
failedCount++;
}
}
//await SaveMultipleAlbumArtsAsync(tempList).ConfigureAwait(false);
//we send the message to load the album. This comes first so there is enough time to load all albums before new list come up.
Messenger.Instance.NotifyColleagues(MessageTypes.MSG_ADD_ALBUMS, tempList);
//now we add 100 songs directly into our TracksCollection which is an ObservableCollection. This is faster because only one event is invoked.
TracksCollection.AddRange(tempList);
//now we load 100 songs into database.
service.AddMediafiles(tempList);
//we clear the 'tempList' so it can come with only 100 songs again.
tempList.Clear();
//Since the no. of files in 'files' list is 100, only 100 files will be loaded after which we will step out of while loop.
//To avoid this, we create and run a task that loads the next 100 files. Stepping forward 100 steps without increasing the index.
files = await queryResult.GetFilesAsync(index, stepSize).AsTask().ConfigureAwait(false);
//consequently we have to increase the index by 100 so that songs are not repeated.
index += 200;
}
catch (Exception ex)
{
string message1 = ex.Message + "||" + ex.InnerException;
await NotificationManager.ShowAsync(message1);
}
}
stop.Stop();
string message = string.Format("Library successfully loaded! Total Songs: {0}; Failed: {1}; Loaded: {2}; Time Taken: {3}", count, failedCount, i, stop.Elapsed.TotalSeconds);
await NotificationManager.ShowAsync(message);
service.Dispose();
model = null;
}
}
