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99 lines
3.7 KiB
C#
99 lines
3.7 KiB
C#
using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.Persistence;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.Logging;
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using System;
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using System.Collections.Concurrent;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Server.Implementations.Library
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{
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/// <summary>
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/// Class DisplayPreferencesManager
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/// </summary>
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public class DisplayPreferencesManager : IDisplayPreferencesManager
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{
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/// <summary>
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/// The _logger
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/// </summary>
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private readonly ILogger _logger;
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/// <summary>
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/// The _display preferences
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/// </summary>
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private readonly ConcurrentDictionary<Guid, Task<DisplayPreferences>> _displayPreferences = new ConcurrentDictionary<Guid, Task<DisplayPreferences>>();
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/// <summary>
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/// Gets the active user repository
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/// </summary>
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/// <value>The display preferences repository.</value>
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public IDisplayPreferencesRepository Repository { get; set; }
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/// <summary>
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/// Initializes a new instance of the <see cref="DisplayPreferencesManager"/> class.
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/// </summary>
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/// <param name="logger">The logger.</param>
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public DisplayPreferencesManager(ILogger logger)
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{
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_logger = logger;
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}
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/// <summary>
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/// Gets the display preferences.
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/// </summary>
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/// <param name="displayPreferencesId">The display preferences id.</param>
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/// <returns>DisplayPreferences.</returns>
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public Task<DisplayPreferences> GetDisplayPreferences(Guid displayPreferencesId)
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{
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return _displayPreferences.GetOrAdd(displayPreferencesId, keyName => RetrieveDisplayPreferences(displayPreferencesId));
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}
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/// <summary>
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/// Retrieves the display preferences.
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/// </summary>
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/// <param name="displayPreferencesId">The display preferences id.</param>
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/// <returns>DisplayPreferences.</returns>
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private async Task<DisplayPreferences> RetrieveDisplayPreferences(Guid displayPreferencesId)
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{
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var displayPreferences = await Repository.GetDisplayPreferences(displayPreferencesId).ConfigureAwait(false);
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return displayPreferences ?? new DisplayPreferences { Id = displayPreferencesId };
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}
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/// <summary>
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/// Saves display preferences for an item
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/// </summary>
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/// <param name="displayPreferences">The display preferences.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task.</returns>
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public async Task SaveDisplayPreferences(DisplayPreferences displayPreferences, CancellationToken cancellationToken)
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{
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if (displayPreferences == null)
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{
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throw new ArgumentNullException("displayPreferences");
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}
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if (displayPreferences.Id == Guid.Empty)
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{
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throw new ArgumentNullException("displayPreferences.Id");
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}
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try
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{
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await Repository.SaveDisplayPreferences(displayPreferences,
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cancellationToken).ConfigureAwait(false);
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var newValue = Task.FromResult(displayPreferences);
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// Once it succeeds, put it into the dictionary to make it available to everyone else
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_displayPreferences.AddOrUpdate(displayPreferences.Id, newValue, delegate { return newValue; });
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error saving display preferences", ex);
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throw;
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}
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}
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}
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}
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