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ReleaseSearchService.cs
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/
ReleaseSearchService.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using NLog;
using NzbDrone.Common.Instrumentation.Extensions;
using NzbDrone.Core.Exceptions;
using NzbDrone.Core.Indexers;
using NzbDrone.Core.Indexers.Events;
using NzbDrone.Core.IndexerSearch.Definitions;
using NzbDrone.Core.Messaging.Events;
using NzbDrone.Core.Parser;
using NzbDrone.Core.Parser.Model;
namespace NzbDrone.Core.IndexerSearch
{
public interface IReleaseSearchService
{
Task<NewznabResults> Search(NewznabRequest request, List<int> indexerIds, bool interactiveSearch);
}
public class ReleaseSearchService : IReleaseSearchService
{
private readonly IIndexerLimitService _indexerLimitService;
private readonly IEventAggregator _eventAggregator;
private readonly IIndexerFactory _indexerFactory;
private readonly Logger _logger;
public ReleaseSearchService(IEventAggregator eventAggregator,
IIndexerFactory indexerFactory,
IIndexerLimitService indexerLimitService,
Logger logger)
{
_eventAggregator = eventAggregator;
_indexerFactory = indexerFactory;
_indexerLimitService = indexerLimitService;
_logger = logger;
}
public Task<NewznabResults> Search(NewznabRequest request, List<int> indexerIds, bool interactiveSearch)
{
return request.t switch
{
"movie" => MovieSearch(request, indexerIds, interactiveSearch),
"music" => MusicSearch(request, indexerIds, interactiveSearch),
"tvsearch" => TvSearch(request, indexerIds, interactiveSearch),
"book" => BookSearch(request, indexerIds, interactiveSearch),
_ => BasicSearch(request, indexerIds, interactiveSearch)
};
}
private async Task<NewznabResults> MovieSearch(NewznabRequest request, List<int> indexerIds, bool interactiveSearch)
{
var searchSpec = Get<MovieSearchCriteria>(request, indexerIds, interactiveSearch);
var imdbId = ParseUtil.GetImdbId(request.imdbid);
searchSpec.ImdbId = imdbId?.ToString("D7");
searchSpec.TmdbId = request.tmdbid;
searchSpec.TraktId = request.traktid;
searchSpec.DoubanId = request.doubanid;
searchSpec.Year = request.year;
searchSpec.Genre = request.genre;
var releases = await Dispatch(indexer => indexer.Fetch(searchSpec), searchSpec);
return new NewznabResults { Releases = DeDupeReleases(releases) };
}
private async Task<NewznabResults> MusicSearch(NewznabRequest request, List<int> indexerIds, bool interactiveSearch)
{
var searchSpec = Get<MusicSearchCriteria>(request, indexerIds, interactiveSearch);
searchSpec.Artist = request.artist;
searchSpec.Album = request.album;
searchSpec.Label = request.label;
searchSpec.Genre = request.genre;
searchSpec.Track = request.track;
searchSpec.Year = request.year;
var releases = await Dispatch(indexer => indexer.Fetch(searchSpec), searchSpec);
return new NewznabResults { Releases = DeDupeReleases(releases) };
}
private async Task<NewznabResults> TvSearch(NewznabRequest request, List<int> indexerIds, bool interactiveSearch)
{
var searchSpec = Get<TvSearchCriteria>(request, indexerIds, interactiveSearch);
var imdbId = ParseUtil.GetImdbId(request.imdbid);
searchSpec.ImdbId = imdbId?.ToString("D7");
searchSpec.Season = request.season;
searchSpec.Episode = request.ep;
searchSpec.TvdbId = request.tvdbid;
searchSpec.TraktId = request.traktid;
searchSpec.TmdbId = request.tmdbid;
searchSpec.DoubanId = request.doubanid;
searchSpec.RId = request.rid;
searchSpec.TvMazeId = request.tvmazeid;
searchSpec.Year = request.year;
searchSpec.Genre = request.genre;
var releases = await Dispatch(indexer => indexer.Fetch(searchSpec), searchSpec);
return new NewznabResults { Releases = DeDupeReleases(releases) };
}
private async Task<NewznabResults> BookSearch(NewznabRequest request, List<int> indexerIds, bool interactiveSearch)
{
var searchSpec = Get<BookSearchCriteria>(request, indexerIds, interactiveSearch);
searchSpec.Author = request.author;
searchSpec.Title = request.title;
searchSpec.Publisher = request.publisher;
searchSpec.Year = request.year;
searchSpec.Genre = request.genre;
var releases = await Dispatch(indexer => indexer.Fetch(searchSpec), searchSpec);
return new NewznabResults { Releases = DeDupeReleases(releases) };
}
private async Task<NewznabResults> BasicSearch(NewznabRequest request, List<int> indexerIds, bool interactiveSearch)
{
var searchSpec = Get<BasicSearchCriteria>(request, indexerIds, interactiveSearch);
var releases = await Dispatch(indexer => indexer.Fetch(searchSpec), searchSpec);
return new NewznabResults { Releases = DeDupeReleases(releases) };
}
private TSpec Get<TSpec>(NewznabRequest query, List<int> indexerIds, bool interactiveSearch)
where TSpec : SearchCriteriaBase, new()
{
var spec = new TSpec
{
InteractiveSearch = interactiveSearch
};
spec.Categories = query.cat != null ? query.cat.Split(',').Where(s => !string.IsNullOrWhiteSpace(s)).Select(int.Parse).ToArray() : Array.Empty<int>();
spec.SearchTerm = query.q?.Trim();
spec.SearchType = query.t;
spec.Limit = query.limit;
spec.Offset = query.offset;
spec.MinAge = query.minage;
spec.MaxAge = query.maxage;
spec.MinSize = query.minsize;
spec.MaxSize = query.maxsize;
spec.Source = query.source;
spec.Host = query.host;
spec.IndexerIds = indexerIds;
return spec;
}
private async Task<IList<ReleaseInfo>> Dispatch(Func<IIndexer, Task<IndexerPageableQueryResult>> searchAction, SearchCriteriaBase criteriaBase)
{
var indexers = _indexerFactory.Enabled();
if (criteriaBase.IndexerIds is { Count: > 0 })
{
indexers = indexers.Where(i => criteriaBase.IndexerIds.Contains(i.Definition.Id) ||
(criteriaBase.IndexerIds.Contains(-1) && i.Protocol == DownloadProtocol.Usenet) ||
(criteriaBase.IndexerIds.Contains(-2) && i.Protocol == DownloadProtocol.Torrent))
.ToList();
if (criteriaBase.InteractiveSearch && indexers.Count == 0)
{
_logger.Debug("Search failed due to all selected indexers being unavailable: {0}", string.Join(", ", criteriaBase.IndexerIds));
throw new SearchFailedException("Search failed due to all selected indexers being unavailable");
}
}
if (criteriaBase.Categories is { Length: > 0 })
{
//Only query supported indexers
indexers = indexers.Where(i => ((IndexerDefinition)i.Definition).Capabilities.Categories.SupportedCategories(criteriaBase.Categories).Any()).ToList();
if (indexers.Count == 0)
{
_logger.Debug("All provided categories are unsupported by selected indexers: {0}", string.Join(", ", criteriaBase.Categories));
return Array.Empty<ReleaseInfo>();
}
}
_logger.ProgressInfo("Searching indexer(s): [{0}] for {1}", string.Join(", ", indexers.Select(i => i.Definition.Name).ToList()), criteriaBase.ToString());
var tasks = indexers.Select(x => DispatchIndexer(searchAction, x, criteriaBase));
var batch = await Task.WhenAll(tasks);
var reports = batch.SelectMany(x => x).ToList();
_logger.ProgressDebug("Total of {0} reports were found for {1} from {2} indexer(s)", reports.Count, criteriaBase, indexers.Count);
return reports;
}
private async Task<IList<ReleaseInfo>> DispatchIndexer(Func<IIndexer, Task<IndexerPageableQueryResult>> searchAction, IIndexer indexer, SearchCriteriaBase criteriaBase)
{
if (_indexerLimitService.AtQueryLimit((IndexerDefinition)indexer.Definition))
{
return Array.Empty<ReleaseInfo>();
}
try
{
var indexerReports = await searchAction(indexer);
var releases = indexerReports.Releases;
//Filter results to only those in searched categories
if (criteriaBase.Categories.Length > 0)
{
var expandedQueryCats = ((IndexerDefinition)indexer.Definition).Capabilities.Categories.ExpandTorznabQueryCategories(criteriaBase.Categories);
releases = releases.Where(result => result.Categories?.Any() != true || expandedQueryCats.Intersect(result.Categories.Select(c => c.Id)).Any()).ToList();
if (releases.Count != indexerReports.Releases.Count)
{
_logger.Trace("{0} releases from {1} ({2}) which didn't contain search categories [{3}] were filtered", indexerReports.Releases.Count - releases.Count, ((IndexerDefinition)indexer.Definition).Name, indexer.Name, string.Join(", ", expandedQueryCats));
}
}
if (criteriaBase.MinAge is > 0)
{
var cutoffDate = DateTime.UtcNow.Subtract(TimeSpan.FromDays(criteriaBase.MinAge.Value));
releases = releases.Where(r => r.PublishDate <= cutoffDate).ToList();
}
if (criteriaBase.MaxAge is > 0)
{
var cutoffDate = DateTime.UtcNow.Subtract(TimeSpan.FromDays(criteriaBase.MaxAge.Value));
releases = releases.Where(r => r.PublishDate >= cutoffDate).ToList();
}
if (criteriaBase.MinSize is > 0)
{
var minSize = criteriaBase.MinSize.Value;
releases = releases.Where(r => r.Size >= minSize).ToList();
}
if (criteriaBase.MaxSize is > 0)
{
var maxSize = criteriaBase.MaxSize.Value;
releases = releases.Where(r => r.Size <= maxSize).ToList();
}
foreach (var query in indexerReports.Queries)
{
_eventAggregator.PublishEvent(new IndexerQueryEvent(indexer.Definition.Id, criteriaBase, query));
}
return releases;
}
catch (Exception e)
{
_eventAggregator.PublishEvent(new IndexerQueryEvent(indexer.Definition.Id, criteriaBase, new IndexerQueryResult()));
_logger.Error(e, "Error while searching for {0}", criteriaBase);
}
return Array.Empty<ReleaseInfo>();
}
private List<ReleaseInfo> DeDupeReleases(IList<ReleaseInfo> releases)
{
// De-dupe reports by guid so duplicate results aren't returned. Pick the one with the higher indexer priority.
return releases.GroupBy(r => r.Guid)
.Select(r => r.OrderBy(v => v.IndexerPriority).First())
.ToList();
}
}
}