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using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller.Extensions;
using MediaBrowser.Controller.Library;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Net;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Xml;
namespace MediaBrowser.Controller.Providers.TV
{
/// <summary>
/// Class TvdbPrescanTask
/// </summary>
public class TvdbPrescanTask : ILibraryPrescanTask
{
/// <summary>
/// The server time URL
/// </summary>
private const string ServerTimeUrl = "http://thetvdb.com/api/Updates.php?type=none";
/// <summary>
/// The updates URL
/// </summary>
private const string UpdatesUrl = "http://thetvdb.com/api/Updates.php?type=all&time={0}";
/// <summary>
/// The _HTTP client
/// </summary>
private readonly IHttpClient _httpClient;
/// <summary>
/// The _logger
/// </summary>
private readonly ILogger _logger;
/// <summary>
/// The _config
/// </summary>
private readonly IConfigurationManager _config;
/// <summary>
/// Initializes a new instance of the <see cref="TvdbPrescanTask"/> class.
/// </summary>
/// <param name="logger">The logger.</param>
/// <param name="httpClient">The HTTP client.</param>
/// <param name="config">The config.</param>
public TvdbPrescanTask(ILogger logger, IHttpClient httpClient, IConfigurationManager config)
{
_logger = logger;
_httpClient = httpClient;
_config = config;
}
/// <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)
{
var path = RemoteSeriesProvider.GetSeriesDataPath(_config.CommonApplicationPaths);
var timestampFile = Path.Combine(path, "time.txt");
var timestampFileInfo = new FileInfo(timestampFile);
// Don't check for tvdb updates anymore frequently than 24 hours
if (timestampFileInfo.Exists && (DateTime.UtcNow - timestampFileInfo.LastWriteTimeUtc).TotalDays < 1)
{
return;
}
// Find out the last time we queried tvdb for updates
var lastUpdateTime = timestampFileInfo.Exists ? File.ReadAllText(timestampFile, Encoding.UTF8) : string.Empty;
string newUpdateTime;
var existingDirectories = Directory.EnumerateDirectories(path).Select(Path.GetFileName).ToList();
// If this is our first time, update all series
if (string.IsNullOrEmpty(lastUpdateTime))
{
// First get tvdb server time
using (var stream = await _httpClient.Get(new HttpRequestOptions
{
Url = ServerTimeUrl,
CancellationToken = cancellationToken,
EnableHttpCompression = true,
ResourcePool = RemoteSeriesProvider.Current.TvDbResourcePool
}).ConfigureAwait(false))
{
var doc = new XmlDocument();
doc.Load(stream);
newUpdateTime = doc.SafeGetString("//Time");
}
await UpdateSeries(existingDirectories, path, cancellationToken).ConfigureAwait(false);
}
else
{
var seriesToUpdate = await GetSeriesIdsToUpdate(existingDirectories, lastUpdateTime, cancellationToken).ConfigureAwait(false);
newUpdateTime = seriesToUpdate.Item2;
await UpdateSeries(seriesToUpdate.Item1, path, cancellationToken).ConfigureAwait(false);
}
File.WriteAllText(timestampFile, newUpdateTime, Encoding.UTF8);
}
/// <summary>
/// Gets the series ids to update.
/// </summary>
/// <param name="existingSeriesIds">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<Tuple<IEnumerable<string>, string>> GetSeriesIdsToUpdate(IEnumerable<string> existingSeriesIds, string lastUpdateTime, CancellationToken cancellationToken)
{
// First get last time
using (var stream = await _httpClient.Get(new HttpRequestOptions
{
Url = string.Format(UpdatesUrl, lastUpdateTime),
CancellationToken = cancellationToken,
EnableHttpCompression = true,
ResourcePool = RemoteSeriesProvider.Current.TvDbResourcePool
}).ConfigureAwait(false))
{
var doc = new XmlDocument();
doc.Load(stream);
var newUpdateTime = doc.SafeGetString("//Time");
var seriesNodes = doc.SelectNodes("//Series");
var seriesList = seriesNodes == null ? new string[] { } :
seriesNodes.Cast<XmlNode>()
.Select(i => i.InnerText)
.Where(i => !string.IsNullOrWhiteSpace(i) && existingSeriesIds.Contains(i, StringComparer.OrdinalIgnoreCase));
return new Tuple<IEnumerable<string>, string>(seriesList, newUpdateTime);
}
}
/// <summary>
/// Updates the series.
/// </summary>
/// <param name="seriesIds">The series ids.</param>
/// <param name="seriesDataPath">The series data path.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
private async Task UpdateSeries(IEnumerable<string> seriesIds, string seriesDataPath, CancellationToken cancellationToken)
{
foreach (var seriesId in seriesIds)
{
try
{
await UpdateSeries(seriesId, seriesDataPath, cancellationToken).ConfigureAwait(false);
}
catch (HttpException ex)
{
// Already logged at lower levels, but don't fail the whole operation, unless timed out
if (ex.IsTimedOut)
{
throw;
}
}
}
}
/// <summary>
/// Updates the series.
/// </summary>
/// <param name="id">The id.</param>
/// <param name="seriesDataPath">The series data path.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
private Task UpdateSeries(string id, string seriesDataPath, CancellationToken cancellationToken)
{
_logger.Info("Updating series " + id);
seriesDataPath = Path.Combine(seriesDataPath, id);
if (!Directory.Exists(seriesDataPath))
{
Directory.CreateDirectory(seriesDataPath);
}
return RemoteSeriesProvider.Current.DownloadSeriesZip(id, seriesDataPath, cancellationToken);
}
}
}
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