fixes #585 - Use tmdb updates api for people

MediaBrowser.Server.Implementations/Library/Validators/PeopleValidator.cs

@@ -0,0 +1,147 @@
+using MediaBrowser.Common.Progress;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Model.Logging;
+using MoreLinq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Server.Implementations.Library.Validators
+{
+    /// <summary>
+    /// Class PeopleValidator
+    /// </summary>
+    public class PeopleValidator
+    {
+        /// <summary>
+        /// The _library manager
+        /// </summary>
+        private readonly ILibraryManager _libraryManager;
+        /// <summary>
+        /// The _logger
+        /// </summary>
+        private readonly ILogger _logger;
+
+        private readonly IEnumerable<IPeoplePrescanTask> _prescanTasks;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PeopleValidator" /> class.
+        /// </summary>
+        /// <param name="libraryManager">The library manager.</param>
+        /// <param name="prescanTasks">The prescan tasks.</param>
+        /// <param name="logger">The logger.</param>
+        public PeopleValidator(ILibraryManager libraryManager, IEnumerable<IPeoplePrescanTask> prescanTasks, ILogger logger)
+        {
+            _libraryManager = libraryManager;
+            _logger = logger;
+            _prescanTasks = prescanTasks;
+        }
+
+        /// <summary>
+        /// Validates the people.
+        /// </summary>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <param name="progress">The progress.</param>
+        /// <returns>Task.</returns>
+        public async Task ValidatePeople(CancellationToken cancellationToken, IProgress<double> progress)
+        {
+            var innerProgress = new ActionableProgress<double>();
+
+            innerProgress.RegisterAction(pct => progress.Report(pct * .15));
+
+            // Run prescan tasks
+            await RunPrescanTasks(innerProgress, cancellationToken).ConfigureAwait(false);
+
+            progress.Report(15);
+            
+            var people = _libraryManager.RootFolder.GetRecursiveChildren()
+                .SelectMany(c => c.People)
+                .DistinctBy(p => p.Name, StringComparer.OrdinalIgnoreCase)
+                .ToList();
+
+            var numComplete = 0;
+
+            foreach (var person in people)
+            {
+                cancellationToken.ThrowIfCancellationRequested();
+
+                try
+                {
+                    var item = _libraryManager.GetPerson(person.Name);
+
+                    await item.RefreshMetadata(cancellationToken).ConfigureAwait(false);
+                }
+                catch (Exception ex)
+                {
+                    _logger.ErrorException("Error validating IBN entry {0}", ex, person.Name);
+                }
+
+                // Update progress
+                numComplete++;
+                double percent = numComplete;
+                percent /= people.Count;
+
+                progress.Report(15 + 85 * percent);
+            }
+
+            progress.Report(100);
+
+            _logger.Info("People validation complete");
+
+            // Bad practice, i know. But we keep a lot in memory, unfortunately.
+            GC.Collect(2, GCCollectionMode.Forced, true);
+            GC.Collect(2, GCCollectionMode.Forced, true);
+        }
+
+        /// <summary>
+        /// Runs the prescan tasks.
+        /// </summary>
+        /// <param name="progress">The progress.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        private async Task RunPrescanTasks(IProgress<double> progress, CancellationToken cancellationToken)
+        {
+            var tasks = _prescanTasks.ToList();
+
+            var numComplete = 0;
+            var numTasks = tasks.Count;
+
+            foreach (var task in tasks)
+            {
+                var innerProgress = new ActionableProgress<double>();
+
+                // Prevent access to modified closure
+                var currentNumComplete = numComplete;
+
+                innerProgress.RegisterAction(pct =>
+                {
+                    double innerPercent = (currentNumComplete * 100) + pct;
+                    innerPercent /= numTasks;
+                    progress.Report(innerPercent);
+                });
+
+                try
+                {
+                    await task.Run(innerProgress, cancellationToken);
+                }
+                catch (OperationCanceledException)
+                {
+                    _logger.Info("Pre-scan task cancelled: {0}", task.GetType().Name);
+                }
+                catch (Exception ex)
+                {
+                    _logger.ErrorException("Error running pre-scan task", ex);
+                }
+
+                numComplete++;
+                double percent = numComplete;
+                percent /= numTasks;
+                progress.Report(percent * 100);
+            }
+
+            progress.Report(100);
+        }
+    }
+}