using MediaBrowser.Common.Net; using MediaBrowser.Controller.Entities.Audio; using MediaBrowser.Controller.Providers; using MediaBrowser.Model.Entities; using MediaBrowser.Model.Providers; using System; using System.Collections.Generic; using System.Globalization; using System.IO; using System.Linq; using System.Net; using System.Text; using System.Threading; using System.Threading.Tasks; using System.Xml; using MediaBrowser.Controller.Extensions; using MediaBrowser.Model.Xml; namespace MediaBrowser.Providers.Music { public class MusicBrainzArtistProvider : IRemoteMetadataProvider { private readonly IXmlReaderSettingsFactory _xmlSettings; public MusicBrainzArtistProvider(IXmlReaderSettingsFactory xmlSettings) { _xmlSettings = xmlSettings; } public async Task> GetSearchResults(ArtistInfo searchInfo, CancellationToken cancellationToken) { var musicBrainzId = searchInfo.GetMusicBrainzArtistId(); if (!string.IsNullOrWhiteSpace(musicBrainzId)) { var url = string.Format("/ws/2/artist/?query=arid:{0}", musicBrainzId); using (var stream = await MusicBrainzAlbumProvider.Current.GetMusicBrainzResponse(url, false, cancellationToken) .ConfigureAwait(false)) { return GetResultsFromResponse(stream); } } else { // They seem to throw bad request failures on any term with a slash var nameToSearch = searchInfo.Name.Replace('/', ' '); var url = String.Format("/ws/2/artist/?query=artist:\"{0}\"", UrlEncode(nameToSearch)); using (var stream = await MusicBrainzAlbumProvider.Current.GetMusicBrainzResponse(url, true, cancellationToken).ConfigureAwait(false)) { var results = GetResultsFromResponse(stream).ToList(); if (results.Count > 0) { return results; } } if (HasDiacritics(searchInfo.Name)) { // Try again using the search with accent characters url url = String.Format("/ws/2/artist/?query=artistaccent:\"{0}\"", UrlEncode(nameToSearch)); using (var stream = await MusicBrainzAlbumProvider.Current.GetMusicBrainzResponse(url, true, cancellationToken).ConfigureAwait(false)) { return GetResultsFromResponse(stream); } } } return new List(); } private IEnumerable GetResultsFromResponse(Stream stream) { using (var oReader = new StreamReader(stream, Encoding.UTF8)) { var settings = _xmlSettings.Create(false); settings.CheckCharacters = false; settings.IgnoreProcessingInstructions = true; settings.IgnoreComments = true; using (var reader = XmlReader.Create(oReader, settings)) { reader.MoveToContent(); reader.Read(); // Loop through each element while (!reader.EOF && reader.ReadState == ReadState.Interactive) { if (reader.NodeType == XmlNodeType.Element) { switch (reader.Name) { case "artist-list": { if (reader.IsEmptyElement) { reader.Read(); continue; } using (var subReader = reader.ReadSubtree()) { return ParseArtistList(subReader); } } default: { reader.Skip(); break; } } } else { reader.Read(); } } return new List(); } } } private IEnumerable ParseArtistList(XmlReader reader) { var list = new List(); reader.MoveToContent(); reader.Read(); // Loop through each element while (!reader.EOF && reader.ReadState == ReadState.Interactive) { if (reader.NodeType == XmlNodeType.Element) { switch (reader.Name) { case "artist": { if (reader.IsEmptyElement) { reader.Read(); continue; } var mbzId = reader.GetAttribute("id"); using (var subReader = reader.ReadSubtree()) { var artist = ParseArtist(subReader, mbzId); if (artist != null) { list.Add(artist); } } break; } default: { reader.Skip(); break; } } } else { reader.Read(); } } return list; } private RemoteSearchResult ParseArtist(XmlReader reader, string artistId) { var result = new RemoteSearchResult(); reader.MoveToContent(); reader.Read(); // http://stackoverflow.com/questions/2299632/why-does-xmlreader-skip-every-other-element-if-there-is-no-whitespace-separator // Loop through each element while (!reader.EOF && reader.ReadState == ReadState.Interactive) { if (reader.NodeType == XmlNodeType.Element) { switch (reader.Name) { case "name": { result.Name = reader.ReadElementContentAsString(); break; } case "annotation": { result.Overview = reader.ReadElementContentAsString(); break; } default: { // there is sort-name if ever needed reader.Skip(); break; } } } else { reader.Read(); } } result.SetProviderId(MetadataProviders.MusicBrainzArtist, artistId); if (string.IsNullOrWhiteSpace(artistId) || string.IsNullOrWhiteSpace(result.Name)) { return null; } return result; } public async Task> GetMetadata(ArtistInfo id, CancellationToken cancellationToken) { var result = new MetadataResult { Item = new MusicArtist() }; var musicBrainzId = id.GetMusicBrainzArtistId(); if (string.IsNullOrWhiteSpace(musicBrainzId)) { var searchResults = await GetSearchResults(id, cancellationToken).ConfigureAwait(false); var singleResult = searchResults.FirstOrDefault(); if (singleResult != null) { musicBrainzId = singleResult.GetProviderId(MetadataProviders.MusicBrainzArtist); //result.Item.Name = singleResult.Name; result.Item.Overview = singleResult.Overview; } } if (!string.IsNullOrWhiteSpace(musicBrainzId)) { result.HasMetadata = true; result.Item.SetProviderId(MetadataProviders.MusicBrainzArtist, musicBrainzId); } return result; } /// /// Determines whether the specified text has diacritics. /// /// The text. /// true if the specified text has diacritics; otherwise, false. private bool HasDiacritics(string text) { return !String.Equals(text, text.RemoveDiacritics(), StringComparison.Ordinal); } /// /// Encodes an URL. /// /// The name. /// System.String. private string UrlEncode(string name) { return WebUtility.UrlEncode(name); } public string Name { get { return "MusicBrainz"; } } public Task GetImageResponse(string url, CancellationToken cancellationToken) { throw new NotImplementedException(); } } }