/// <summary>
/// Parses the XML property list.
/// </summary>
/// <param name="dict">A PList in which the parsed elements will be output.</param>
/// <param name="elements">A collection of the elements in the property list.</param>
internal void Parse(PList dict, IEnumerable <XElement> elements)
{
Contract.Requires(dict != null);
Contract.Requires(elements != null);
for (int i = 0; i < elements.Count(); i += 2)
{
XElement key = elements.ElementAt(i);
XElement val = elements.ElementAt(i + 1);
dict[key.Value] = ParseValue(val);
}
}
/// <summary>
/// Parses an element in the XML property list.
/// </summary>
/// <param name="val">The XML element to parse.</param>
/// <returns>The converted object representation of the element.</returns>
private object ParseValue(XElement val)
{
Contract.Requires(val != null);
switch (val.Name.ToString())
{
case "string":
return(val.Value);
case "integer":
return(long.Parse(val.Value));
case "real":
return(float.Parse(val.Value));
case "true":
return(true);
case "false":
return(false);
case "dict":
PList plist = new PList();
Parse(plist, val.Elements());
return(plist);
case "array":
List <object> list = ParseArray(val.Elements());
return(list);
case "date":
return(DateTime.Parse(val.Value));
case "data":
return(Convert.FromBase64String(val.Value));
default:
throw new ArgumentException("Unsupported");
}
}
/// <summary>
/// Loads the iTunes Library from an XML file and reads the PLIST-formatted contents.
/// </summary>
/// <param name="library">The folder containing the iTunes Library.</param>
/// <returns>Whether the XML file exists or not.</returns>
/// <returns>Whether the process was successful or not.</returns>
private static async Task <bool> LoadLibraryFromXml(StorageFolder library)
{
try
{
StorageFile xmlFile = await library.GetFileAsync(ITUNES_XML);
XDocument xmlDocument = null;
// Attempt to read the XML file format
var xmlStreamInfo = await xmlFile.TryReadAsync();
OperatingSystem libraryType = xmlStreamInfo.Item1.Value;
using (var xmlStream = xmlStreamInfo.Item2)
{
xmlDocument = XDocument.Load(xmlStream.AsStreamForRead());
}
// Get the PLIST from the XML and parse
var plist = new PList(xmlDocument);
IEnumerable <Album> libraryAlbums;
IEnumerable <Playlist> libraryPlaylists;
ParseXml(library.Path, plist, out libraryAlbums, out libraryPlaylists);
// Save the parsed objects if possible
TunesDataSource.Default = new TunesDataSource(libraryAlbums, libraryPlaylists, libraryType);
await SerializeAsync();
return(true);
}
catch (Exception)
{
return(false);
}
}
/// <summary>
/// Helper method to process an iTunes PLIST into a List of Album objects.
/// </summary>
/// <returns>Whether the process was successful or not.</returns>
/// <exception cref="System.Exception">if the PLIST parsing failed.</exception>
private static void ParseXml(string actualLibaryPath, PList libraryIndex, out IEnumerable <Album> outAlbums, out IEnumerable <Playlist> outPlaylists)
{
Contract.Requires(!string.IsNullOrEmpty(actualLibaryPath));
Contract.Requires(libraryIndex != null);
// file://localhost/C:/Users/Steve/Music/iTunes/iTunes%20Media/
// file://localhost/Users/Steve/Music/iTunes/iTunes%20Media/
string musicFolderString = libraryIndex.GetStringOrDefault("Music Folder");
string declaredMediaPath = new Uri(musicFolderString).LocalPath;
var absoluteMediaPath = GetAbsoluteMediaPathUri(actualLibaryPath, declaredMediaPath);
IEnumerable <PList> trackListRaw = libraryIndex.GetOrDefault <PList>("Tracks").Values.Cast <PList>();
IEnumerable <PList> playlistListRaw = libraryIndex.GetOrDefault <List <object> >("Playlists").Cast <PList>();
if (string.IsNullOrEmpty(declaredMediaPath) || trackListRaw == null || playlistListRaw == null)
{
throw new InvalidOperationException();
}
Dictionary <AlbumKey, AlbumBuilder> albumBuilders = new Dictionary <AlbumKey, AlbumBuilder>();
foreach (var trackInfoRaw in trackListRaw)
{
string trackLocationString = trackInfoRaw.GetStringOrDefault("Location");
long trackBitRateLong = trackInfoRaw.GetLongOrDefault("Bit Rate");
if (IsValidMediaKind(trackLocationString, trackBitRateLong))
{
string titleString = trackInfoRaw.GetStringOrDefault("Name");
string albumString = trackInfoRaw.GetStringOrDefault("Album");
string artistString = trackInfoRaw.GetStringOrDefault("Artist");
string albumArtistString = trackInfoRaw.GetStringOrDefault("Album Artist") ?? artistString;
int trackIDInt = trackInfoRaw.GetIntOrDefault("Track ID");
int discNumberInt = trackInfoRaw.GetIntOrDefault("Disc Number");
int trackNumberInt = trackInfoRaw.GetIntOrDefault("Track Number");
int yearInt = trackInfoRaw.GetIntOrDefault("Year");
int totalTimeInt = trackInfoRaw.GetIntOrDefault("Total Time");
var relativeTrackLocation = new Uri(trackLocationString).LocalPath.Replace(declaredMediaPath, string.Empty);
string formattedLocationString = Path.Combine(absoluteMediaPath, relativeTrackLocation);
AlbumBuilder albumBuilder;
var albumBuilderID = new AlbumKey(albumString, albumArtistString);
if (!albumBuilders.TryGetValue(albumBuilderID, out albumBuilder))
{
albumBuilder = new AlbumBuilder(albumString, albumArtistString, yearInt);
albumBuilders.Add(albumBuilderID, albumBuilder);
}
Contract.Assume(albumBuilder != null); // New AlbumBuilder should have been created if it doesn't yet exist.
albumBuilder.AddTrack(
trackID: trackIDInt,
title: titleString,
artist: artistString,
discNumber: discNumberInt,
trackNumber: trackNumberInt,
location: formattedLocationString,
totalTime: new TimeSpan(0, 0, totalTimeInt / 1000));
}
}
IEnumerable <Album> libraryAlbumsUnsorted = albumBuilders.Values.AsParallel().Select(thatBuilder => thatBuilder.GetAlbum()).ToList();
IEnumerable <Track> libraryTracksUnsorted = libraryAlbumsUnsorted.AsParallel().SelectMany(thatAlbum => thatAlbum.TrackList);
List <Playlist> libraryPlaylists = new List <Playlist>();
foreach (var playlistInfoRaw in playlistListRaw)
{
List <object> playlistItemsRaw = playlistInfoRaw.GetOrDefault <List <object> >("Playlist Items");
if (playlistItemsRaw != null)
{
List <Track> playlistItems = playlistItemsRaw
.Cast <PList>() // This is the only thing I can think of that would cause an exception in this method.
.Select(thatPlist => thatPlist.GetIntOrDefault("Track ID"))
.Join(libraryTracksUnsorted,
itemIndex => itemIndex,
track => track.TrackID,
(index, track) => track).ToList();
if (playlistItems.Count > 0)
{
libraryPlaylists.Add(new Playlist(playlistInfoRaw.GetStringOrDefault("Name"), playlistItems));
}
}
}
outAlbums = libraryAlbumsUnsorted.OrderBy(thatAlbum => thatAlbum.AlbumArtist).ThenBy(thatAlbum => thatAlbum.Title);
outPlaylists = libraryPlaylists.OrderBy(playlist => playlist.Title);
}
