feat: nostr indexer

src/NzbDrone.Core/Indexers/Definitions/Nostr.cs

@@ -0,0 +1,172 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.WebSockets;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using FluentValidation.Results;
+using Newtonsoft.Json;
+using NLog;
+using Nostr.Client.Client;
+using Nostr.Client.Communicator;
+using Nostr.Client.Messages;
+using Nostr.Client.Requests;
+using NzbDrone.Core.Configuration;
+using NzbDrone.Core.Indexers.Settings;
+using NzbDrone.Core.IndexerSearch.Definitions;
+using NzbDrone.Core.Parser.Model;
+
+namespace NzbDrone.Core.Indexers.Definitions;
+
+public class Nostr : IndexerBase<NostrSettings>
+{
+    public Nostr(IIndexerStatusService indexerStatusService, IConfigService configService, Logger logger)
+        : base(indexerStatusService, configService, logger)
+    {
+    }
+
+    public override string Name => "nostr";
+    public override IndexerCapabilities Capabilities { get; protected set; }
+    public override string[] IndexerUrls => new[] { "wss://nos.lol", "wss://relay.nostr.band", "wss://relay.damus.io" };
+    public override string[] LegacyUrls => Array.Empty<string>();
+    public override string Description => "nostr torrent index";
+    public override Encoding Encoding => Encoding.UTF8;
+    public override string Language => "en";
+    public override DownloadProtocol Protocol => DownloadProtocol.Torrent;
+    public override IndexerPrivacy Privacy => IndexerPrivacy.Public;
+
+    public override Task<IndexerPageableQueryResult> Fetch(MovieSearchCriteria searchCriteria)
+    {
+        var filter = new NostrTorrentFilter()
+        {
+            Kinds = new[] { (NostrKind)2003 },
+            HashTags = new[] { "movie" },
+            Search = searchCriteria.SearchTerm
+        };
+        if (searchCriteria.Limit.HasValue)
+        {
+            filter.Limit = searchCriteria.Limit.Value;
+        }
+
+        return FetchFilter(filter);
+    }
+
+    public override Task<IndexerPageableQueryResult> Fetch(MusicSearchCriteria searchCriteria)
+    {
+        throw new NotImplementedException();
+    }
+
+    public override Task<IndexerPageableQueryResult> Fetch(TvSearchCriteria searchCriteria)
+    {
+        throw new NotImplementedException();
+    }
+
+    public override Task<IndexerPageableQueryResult> Fetch(BookSearchCriteria searchCriteria)
+    {
+        throw new NotImplementedException();
+    }
+
+    public override Task<IndexerPageableQueryResult> Fetch(BasicSearchCriteria searchCriteria)
+    {
+        var filter = new NostrTorrentFilter()
+        {
+            Kinds = new[] { (NostrKind)2003 },
+            Search = searchCriteria.SearchTerm
+        };
+        if (searchCriteria.Limit.HasValue)
+        {
+            filter.Limit = searchCriteria.Limit.Value;
+        }
+
+        return FetchFilter(filter);
+    }
+
+    public override Task<byte[]> Download(Uri link)
+    {
+        throw new NotImplementedException();
+    }
+
+    public override IndexerCapabilities GetCapabilities()
+    {
+        throw new NotImplementedException();
+    }
+
+    protected override Task Test(List<ValidationFailure> failures)
+    {
+        // nothing to test
+        return Task.CompletedTask;
+    }
+
+    public override bool SupportsRss => true;
+    public override bool SupportsSearch => true;
+    public override bool SupportsRedirect => false;
+    public override bool SupportsPagination => true;
+    public override bool FollowRedirect => false;
+
+    private async Task<IndexerPageableQueryResult> FetchFilter(NostrFilter filter)
+    {
+        using var client = new NostrWebsocketClient(new NostrWebsocketCommunicator(new Uri(Settings.BaseUrl)), null);
+        var id = Guid.NewGuid().ToString();
+        var req = new NostrRequest(id, filter);
+        var results = new IndexerPageableQueryResult();
+        var tcs = new TaskCompletionSource();
+        var eoseSub = client.Streams.EoseStream.Subscribe(eoseEvent =>
+        {
+            if (eoseEvent.Subscription?.Equals(id) ?? false)
+            {
+                tcs.SetResult();
+            }
+        });
+        var eventsSub = client.Streams.EventStream.Subscribe(subEvent =>
+        {
+            if (!(subEvent.Subscription?.Equals(id) ?? false) || subEvent.Event == default)
+            {
+                return;
+            }
+
+            var ev = subEvent.Event;
+            var files = ev.Tags?.Where(a => a.TagIdentifier == "file").ToArray() ?? Array.Empty<NostrEventTag>();
+            results.Releases.Add(new TorrentInfo()
+            {
+                Guid = $"nostr-{ev.Id}",
+                Title = ev.Tags?.FindFirstTagValue("title"),
+                Description = ev.Content,
+                Files = files.Length,
+                Size = files.Sum(a => long.TryParse(a.AdditionalData[1], out var s) ? s : 0),
+                InfoHash = ev.Tags?.FindFirstTagValue("btih"),
+                ImdbId = int.TryParse(ev.Tags?.FindFirstTagValue("imdb"), out var x) ? x : default,
+                PublishDate = ev.CreatedAt!.Value,
+                DownloadProtocol = DownloadProtocol.Torrent
+            });
+        });
+
+        await client.Communicator.Start();
+        client.Send(req);
+
+        var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5));
+        cts.Token.Register(() =>
+        {
+            tcs.TrySetException(new TimeoutException());
+        });
+        await tcs.Task;
+        eoseSub.Dispose();
+        eventsSub.Dispose();
+        await client.Communicator.Stop(WebSocketCloseStatus.NormalClosure, string.Empty);
+
+        return results;
+    }
+}
+
+public class NostrSettings : NoAuthTorrentBaseSettings
+{
+}
+
+public class NostrTorrentFilter : NostrFilter
+{
+    [JsonProperty("#t")]
+    public string[] HashTags { get; init; }
+
+    [JsonProperty("search")]
+    public string Search { get; init; }
+}

src/NzbDrone.Core/Prowlarr.Core.csproj

@@ -9,6 +9,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Cryptography.KeyDerivation" Version="6.0.25" />
     <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="2.2.0" />
     <PackageReference Include="NLog.Targets.Syslog" Version="7.0.0" />
+    <PackageReference Include="Nostr.Client" Version="2.0.0" />
     <PackageReference Include="Npgsql" Version="7.0.6" />
     <PackageReference Include="Polly" Version="8.3.1" />
     <PackageReference Include="Servarr.FluentMigrator.Runner" Version="3.3.2.9" />