mirror of
https://github.com/jellyfin/jellyfin.git
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165 lines
5.2 KiB
C#
165 lines
5.2 KiB
C#
using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.IO;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.Notifications;
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using MediaBrowser.Controller.Plugins;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.News;
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using MediaBrowser.Model.Notifications;
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using MediaBrowser.Model.Serialization;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Xml;
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namespace MediaBrowser.Server.Implementations.News
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{
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public class NewsEntryPoint : IServerEntryPoint
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{
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private Timer _timer;
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private readonly IHttpClient _httpClient;
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private readonly IApplicationPaths _appPaths;
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private readonly IFileSystem _fileSystem;
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private readonly ILogger _logger;
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private readonly IJsonSerializer _json;
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private readonly INotificationManager _notifications;
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private readonly IUserManager _userManager;
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private readonly TimeSpan _frequency = TimeSpan.FromHours(24);
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public NewsEntryPoint(IHttpClient httpClient, IApplicationPaths appPaths, IFileSystem fileSystem, ILogger logger, IJsonSerializer json, INotificationManager notifications, IUserManager userManager)
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{
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_httpClient = httpClient;
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_appPaths = appPaths;
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_fileSystem = fileSystem;
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_logger = logger;
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_json = json;
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_notifications = notifications;
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_userManager = userManager;
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}
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public void Run()
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{
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_timer = new Timer(OnTimerFired, null, TimeSpan.FromMilliseconds(500), _frequency);
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}
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/// <summary>
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/// Called when [timer fired].
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/// </summary>
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/// <param name="state">The state.</param>
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private async void OnTimerFired(object state)
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{
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var path = Path.Combine(_appPaths.CachePath, "news.json");
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try
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{
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await DownloadNews(path).ConfigureAwait(false);
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error downloading news", ex);
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}
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}
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private async Task DownloadNews(string path)
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{
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DateTime? lastUpdate = null;
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if (File.Exists(path))
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{
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lastUpdate = _fileSystem.GetLastWriteTimeUtc(path);
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}
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var requestOptions = new HttpRequestOptions
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{
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Url = "http://emby.media/community/index.php?/blog/rss/1-media-browser-developers-blog",
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Progress = new Progress<double>()
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};
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using (var stream = await _httpClient.Get(requestOptions).ConfigureAwait(false))
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{
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var doc = new XmlDocument();
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doc.Load(stream);
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var news = ParseRssItems(doc).ToList();
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_json.SerializeToFile(news, path);
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await CreateNotifications(news, lastUpdate, CancellationToken.None).ConfigureAwait(false);
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}
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}
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private Task CreateNotifications(List<NewsItem> items, DateTime? lastUpdate, CancellationToken cancellationToken)
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{
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if (lastUpdate.HasValue)
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{
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items = items.Where(i => i.Date.ToUniversalTime() >= lastUpdate.Value)
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.ToList();
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}
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var tasks = items.Select(i => _notifications.SendNotification(new NotificationRequest
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{
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Date = i.Date,
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Name = i.Title,
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Description = i.Description,
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Url = i.Link,
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UserIds = _userManager.Users.Select(u => u.Id.ToString("N")).ToList()
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}, cancellationToken));
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return Task.WhenAll(tasks);
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}
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private IEnumerable<NewsItem> ParseRssItems(XmlDocument xmlDoc)
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{
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var nodes = xmlDoc.SelectNodes("rss/channel/item");
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if (nodes != null)
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{
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foreach (XmlNode node in nodes)
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{
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var newsItem = new NewsItem();
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newsItem.Title = ParseDocElements(node, "title");
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newsItem.DescriptionHtml = ParseDocElements(node, "description");
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newsItem.Description = newsItem.DescriptionHtml.StripHtml();
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newsItem.Link = ParseDocElements(node, "link");
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var date = ParseDocElements(node, "pubDate");
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DateTime parsedDate;
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if (DateTime.TryParse(date, out parsedDate))
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{
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newsItem.Date = parsedDate;
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}
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yield return newsItem;
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}
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}
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}
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private string ParseDocElements(XmlNode parent, string xPath)
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{
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var node = parent.SelectSingleNode(xPath);
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return node != null ? node.InnerText : string.Empty;
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}
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public void Dispose()
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{
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if (_timer != null)
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{
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_timer.Dispose();
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_timer = null;
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}
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}
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}
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}
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