1 files changed, 192 insertions, 0 deletions
diff --git a/MediaBrowser.Providers/Music/FanArtUpdatesPostScanTask.cs b/MediaBrowser.Providers/Music/FanArtUpdatesPostScanTask.cs
new file mode 100644
index 000000000..9d24490b2
--- /dev/null
+++ b/MediaBrowser.Providers/Music/FanArtUpdatesPostScanTask.cs
@@ -0,0 +1,192 @@
+using MediaBrowser.Common.IO;
+using MediaBrowser.Common.Net;
+using MediaBrowser.Controller.Configuration;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Model.Logging;
+using MediaBrowser.Model.Serialization;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Providers.Music
+{
+    class FanartUpdatesPostScanTask : ILibraryPostScanTask
+    {
+        private const string UpdatesUrl = "http://api.fanart.tv/webservice/newmusic/{0}/{1}/";
+
+        /// <summary>
+        /// The _HTTP client
+        /// </summary>
+        private readonly IHttpClient _httpClient;
+        /// <summary>
+        /// The _logger
+        /// </summary>
+        private readonly ILogger _logger;
+        /// <summary>
+        /// The _config
+        /// </summary>
+        private readonly IServerConfigurationManager _config;
+        private readonly IJsonSerializer _jsonSerializer;
+        private readonly IFileSystem _fileSystem;
+
+        private static readonly CultureInfo UsCulture = new CultureInfo("en-US");
+
+        public FanartUpdatesPostScanTask(IJsonSerializer jsonSerializer, IServerConfigurationManager config, ILogger logger, IHttpClient httpClient, IFileSystem fileSystem)
+        {
+            _jsonSerializer = jsonSerializer;
+            _config = config;
+            _logger = logger;
+            _httpClient = httpClient;
+            _fileSystem = fileSystem;
+        }
+
+        /// <summary>
+        /// Runs the specified progress.
+        /// </summary>
+        /// <param name="progress">The progress.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        public async Task Run(IProgress<double> progress, CancellationToken cancellationToken)
+        {
+            if (!_config.Configuration.EnableInternetProviders || !_config.Configuration.EnableFanArtUpdates)
+            {
+                progress.Report(100);
+                return;
+            }
+
+            var path = FanartArtistProvider.GetArtistDataPath(_config.CommonApplicationPaths);
+
+            Directory.CreateDirectory(path);
+
+            var timestampFile = Path.Combine(path, "time.txt");
+
+            var timestampFileInfo = new FileInfo(timestampFile);
+
+            // Don't check for updates every single time
+            if (timestampFileInfo.Exists && (DateTime.UtcNow - _fileSystem.GetLastWriteTimeUtc(timestampFileInfo)).TotalDays < 3)
+            {
+                return;
+            }
+
+            // Find out the last time we queried for updates
+            var lastUpdateTime = timestampFileInfo.Exists ? File.ReadAllText(timestampFile, Encoding.UTF8) : string.Empty;
+
+            var existingDirectories = Directory.EnumerateDirectories(path).Select(Path.GetFileName).ToList();
+
+            // If this is our first time, don't do any updates and just record the timestamp
+            if (!string.IsNullOrEmpty(lastUpdateTime))
+            {
+                var artistsToUpdate = await GetArtistIdsToUpdate(existingDirectories, lastUpdateTime, cancellationToken).ConfigureAwait(false);
+
+                progress.Report(5);
+
+                await UpdateArtists(artistsToUpdate, progress, cancellationToken).ConfigureAwait(false);
+            }
+
+            var newUpdateTime = Convert.ToInt64(DateTimeToUnixTimestamp(DateTime.UtcNow)).ToString(UsCulture);
+            
+            File.WriteAllText(timestampFile, newUpdateTime, Encoding.UTF8);
+
+            progress.Report(100);
+        }
+
+        /// <summary>
+        /// Gets the artist ids to update.
+        /// </summary>
+        /// <param name="existingArtistIds">The existing series ids.</param>
+        /// <param name="lastUpdateTime">The last update time.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task{IEnumerable{System.String}}.</returns>
+        private async Task<IEnumerable<string>> GetArtistIdsToUpdate(IEnumerable<string> existingArtistIds, string lastUpdateTime, CancellationToken cancellationToken)
+        {
+            // First get last time
+            using (var stream = await _httpClient.Get(new HttpRequestOptions
+            {
+                Url = string.Format(UpdatesUrl, FanartArtistProvider.ApiKey, lastUpdateTime),
+                CancellationToken = cancellationToken,
+                EnableHttpCompression = true,
+                ResourcePool = FanartArtistProvider.FanArtResourcePool
+
+            }).ConfigureAwait(false))
+            {
+                // If empty fanart will return a string of "null", rather than an empty list
+                using (var reader = new StreamReader(stream))
+                {
+                    var json = await reader.ReadToEndAsync().ConfigureAwait(false);
+
+                    if (string.Equals(json, "null", StringComparison.OrdinalIgnoreCase))
+                    {
+                        return new List<string>();
+                    }
+
+                    var existingDictionary = existingArtistIds.ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);
+
+                    var updates = _jsonSerializer.DeserializeFromString<List<FanArtUpdate>>(json);
+
+                    return updates.Select(i => i.id).Where(existingDictionary.ContainsKey);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Updates the artists.
+        /// </summary>
+        /// <param name="idList">The id list.</param>
+        /// <param name="progress">The progress.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        private async Task UpdateArtists(IEnumerable<string> idList, IProgress<double> progress, CancellationToken cancellationToken)
+        {
+            var list = idList.ToList();
+            var numComplete = 0;
+
+            foreach (var id in list)
+            {
+                await UpdateArtist(id, cancellationToken).ConfigureAwait(false);
+
+                numComplete++;
+                double percent = numComplete;
+                percent /= list.Count;
+                percent *= 95;
+
+                progress.Report(percent + 5);
+            }
+        }
+
+        /// <summary>
+        /// Updates the artist.
+        /// </summary>
+        /// <param name="musicBrainzId">The musicBrainzId.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        private Task UpdateArtist(string musicBrainzId, CancellationToken cancellationToken)
+        {
+            _logger.Info("Updating artist " + musicBrainzId);
+
+            return FanartArtistProvider.Current.DownloadArtistXml(musicBrainzId, cancellationToken);
+        }
+
+        /// <summary>
+        /// Dates the time to unix timestamp.
+        /// </summary>
+        /// <param name="dateTime">The date time.</param>
+        /// <returns>System.Double.</returns>
+        private static double DateTimeToUnixTimestamp(DateTime dateTime)
+        {
+            return (dateTime - new DateTime(1970, 1, 1).ToUniversalTime()).TotalSeconds;
+        }
+
+        public class FanArtUpdate
+        {
+            public string id { get; set; }
+            public string name { get; set; }
+            public string new_images { get; set; }
+            public string total_images { get; set; }
+        }
+    }
+}