using MediaBrowser.Common.Configuration; using MediaBrowser.Common.Extensions; using MediaBrowser.Common.Net; using MediaBrowser.Controller.Library; using MediaBrowser.Controller.Notifications; using MediaBrowser.Controller.Plugins; using MediaBrowser.Model.Logging; using MediaBrowser.Model.News; using MediaBrowser.Model.Notifications; using MediaBrowser.Model.Serialization; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Threading; using System.Threading.Tasks; using System.Xml; using MediaBrowser.Common.Progress; using MediaBrowser.Model.IO; using MediaBrowser.Model.Threading; namespace Emby.Server.Implementations.News { public class NewsEntryPoint : IServerEntryPoint { private ITimer _timer; private readonly IHttpClient _httpClient; private readonly IApplicationPaths _appPaths; private readonly IFileSystem _fileSystem; private readonly ILogger _logger; private readonly IJsonSerializer _json; private readonly INotificationManager _notifications; private readonly IUserManager _userManager; private readonly TimeSpan _frequency = TimeSpan.FromHours(24); private readonly ITimerFactory _timerFactory; public NewsEntryPoint(IHttpClient httpClient, IApplicationPaths appPaths, IFileSystem fileSystem, ILogger logger, IJsonSerializer json, INotificationManager notifications, IUserManager userManager, ITimerFactory timerFactory) { _httpClient = httpClient; _appPaths = appPaths; _fileSystem = fileSystem; _logger = logger; _json = json; _notifications = notifications; _userManager = userManager; _timerFactory = timerFactory; } public void Run() { _timer = _timerFactory.Create(OnTimerFired, null, TimeSpan.FromMilliseconds(500), _frequency); } /// /// Called when [timer fired]. /// /// The state. private async void OnTimerFired(object state) { var path = Path.Combine(_appPaths.CachePath, "news.json"); try { await DownloadNews(path).ConfigureAwait(false); } catch (Exception ex) { _logger.ErrorException("Error downloading news", ex); } } private async Task DownloadNews(string path) { DateTime? lastUpdate = null; if (_fileSystem.FileExists(path)) { lastUpdate = _fileSystem.GetLastWriteTimeUtc(path); } var requestOptions = new HttpRequestOptions { Url = "http://emby.media/community/index.php?/blog/rss/1-media-browser-developers-blog", Progress = new SimpleProgress(), UserAgent = "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.42 Safari/537.36", BufferContent = false }; using (var stream = await _httpClient.Get(requestOptions).ConfigureAwait(false)) { using (var reader = XmlReader.Create(stream)) { var news = ParseRssItems(reader).ToList(); _json.SerializeToFile(news, path); await CreateNotifications(news, lastUpdate, CancellationToken.None).ConfigureAwait(false); } } } private Task CreateNotifications(List items, DateTime? lastUpdate, CancellationToken cancellationToken) { if (lastUpdate.HasValue) { items = items.Where(i => i.Date.ToUniversalTime() >= lastUpdate.Value) .ToList(); } var tasks = items.Select(i => _notifications.SendNotification(new NotificationRequest { Date = i.Date, Name = i.Title, Description = i.Description, Url = i.Link, UserIds = _userManager.Users.Select(u => u.Id.ToString("N")).ToList() }, cancellationToken)); return Task.WhenAll(tasks); } private IEnumerable ParseRssItems(XmlReader reader) { reader.MoveToContent(); reader.Read(); while (!reader.EOF && reader.ReadState == ReadState.Interactive) { if (reader.NodeType == XmlNodeType.Element) { switch (reader.Name) { case "channel": { if (!reader.IsEmptyElement) { using (var subReader = reader.ReadSubtree()) { return ParseFromChannelNode(subReader); } } else { reader.Read(); } break; } default: { reader.Skip(); break; } } } else { reader.Read(); } } return new List(); } private IEnumerable ParseFromChannelNode(XmlReader reader) { var list = new List(); reader.MoveToContent(); reader.Read(); while (!reader.EOF && reader.ReadState == ReadState.Interactive) { if (reader.NodeType == XmlNodeType.Element) { switch (reader.Name) { case "item": { if (!reader.IsEmptyElement) { using (var subReader = reader.ReadSubtree()) { list.Add(ParseItem(subReader)); } } else { reader.Read(); } break; } default: { reader.Skip(); break; } } } else { reader.Read(); } } return list; } private NewsItem ParseItem(XmlReader reader) { var item = new NewsItem(); reader.MoveToContent(); reader.Read(); while (!reader.EOF && reader.ReadState == ReadState.Interactive) { if (reader.NodeType == XmlNodeType.Element) { switch (reader.Name) { case "title": { item.Title = reader.ReadElementContentAsString(); break; } case "link": { item.Link = reader.ReadElementContentAsString(); break; } case "description": { item.DescriptionHtml = reader.ReadElementContentAsString(); item.Description = item.DescriptionHtml.StripHtml(); break; } case "pubDate": { var date = reader.ReadElementContentAsString(); DateTime parsedDate; if (DateTime.TryParse(date, out parsedDate)) { item.Date = parsedDate; } break; } default: { reader.Skip(); break; } } } else { reader.Read(); } } return item; } public void Dispose() { if (_timer != null) { _timer.Dispose(); _timer = null; } GC.SuppressFinalize(this); } } }