Reorganize backend to mirror Musify.slnx folder structure
Moves the six backend projects on disk into Core/ and Hosts/ subfolders, matching the solution folders already defined in Musify.slnx, so the file explorer reflects the same layout as the solution: backend/Core/Musify.Domain backend/Core/Musify.Application backend/Core/Musify.Infrastructure backend/Hosts/Musify.Api backend/Hosts/Musify.Worker backend/Hosts/Musify.StreamingGateway Updates every reference to the old paths: ProjectReference entries in Musify.Api.csproj and Musify.Worker.csproj, the three Dockerfiles, deploy/scripts/migrate.ps1|sh, deploy/zitadel/provision.ps1, deploy/up.ps1, deploy/README.md and docs/development.md. Also fixes a stale Dockerfile comment pointing at a compose file that no longer exists. Verified with `dotnet build Musify.slnx` against the new layout.
This commit is contained in:
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using ErrorOr;
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using Microsoft.Extensions.Caching.Memory;
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using Microsoft.Extensions.Logging;
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using Musify.Application.Contracts;
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using Musify.Infrastructure.Configuration;
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using Musify.Infrastructure.Helpers;
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using YouTubeMusicAPI.Client;
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using YouTubeMusicAPI.Models.Search;
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using YouTubeMusicAPI.Models.Streaming;
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using YouTubeMusicAPI.Pagination;
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namespace Musify.Infrastructure.Services
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{
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public class YouTubeMusicService(YouTubeConfiguration configuration, IMemoryCache cache, ILogger<YouTubeMusicService> logger) : IYouTubeMusicService
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{
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private readonly YouTubeMusicClient client = new(geographicalLocation: configuration.GeographicalLocation);
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private readonly SingleFlightCache singleFlight = new(cache);
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private sealed record CachedStreamInfo(string Url, DateTime ExpiresAtUtc);
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public async Task<ErrorOr<YouTubeSearchResult>> SearchSongsAsync(string query, string continuationToken, CancellationToken cancellationToken)
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{
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if (!string.IsNullOrEmpty(continuationToken))
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return await FetchSearchPageAsync(query, continuationToken, cancellationToken);
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return await singleFlight.GetOrCreateAsync(
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SearchResultsCacheKey(query),
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TimeSpan.FromSeconds(configuration.SearchResultsCacheSeconds),
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() => FetchSearchPageAsync(query, continuationToken, cancellationToken));
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}
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private sealed record SearchPage(IReadOnlyList<SearchResult> Results, string NextToken);
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private async Task<ErrorOr<SearchPage>> FetchPageAsync(
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string query,
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SearchCategory category,
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string continuationToken,
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CancellationToken cancellationToken)
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{
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PaginatedAsyncEnumerable<SearchResult>? paginator;
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if (string.IsNullOrEmpty(continuationToken))
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{
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paginator = client.SearchAsync(query, category);
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}
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else if (!cache.TryGetValue(SearchCacheKey(continuationToken), out paginator) || paginator is null)
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{
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return Error.NotFound(description: "The search continuation has expired.");
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}
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IReadOnlyList<SearchResult> results;
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try
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{
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results = await paginator.FetchNextPageAsync(cancellationToken);
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}
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catch (Exception exception)
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{
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logger.LogError(exception, "YouTube Music {Category} search failed for query '{Query}'", category, query);
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return Error.Failure(description: $"YouTube Music search failed: {exception.Message}");
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}
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var nextToken = string.Empty;
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if (paginator.HasMore)
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{
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nextToken = Guid.NewGuid().ToString("N");
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cache.Set(
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SearchCacheKey(nextToken),
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paginator,
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TimeSpan.FromSeconds(configuration.SearchContinuationCacheSeconds));
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}
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return new SearchPage(results, nextToken);
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}
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private async Task<ErrorOr<YouTubeSearchResult>> FetchSearchPageAsync(string query, string continuationToken, CancellationToken cancellationToken)
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{
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var page = await FetchPageAsync(query, SearchCategory.Songs, continuationToken, cancellationToken);
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if (page.IsError)
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return page.Errors;
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var items = page.Value.Results
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.OfType<SongSearchResult>()
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.Select(song => new YouTubeSongResult(
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song.Id,
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song.Name,
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string.Join(", ", song.Artists.Select(artist => artist.Name)),
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song.Album?.Name ?? string.Empty,
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(int)song.Duration.TotalSeconds,
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PickThumbnail(song.Thumbnails),
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song.IsExplicit,
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song.Artists
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.Select(artist => new YouTubeArtistRef(
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string.IsNullOrEmpty(artist.Id) ? null : artist.Id,
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artist.Name))
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.ToList()))
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.ToList();
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return new YouTubeSearchResult(items, page.Value.NextToken);
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}
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public async Task<ErrorOr<YouTubeAlbumSearchResult>> SearchAlbumsAsync(string query, string continuationToken, CancellationToken cancellationToken)
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{
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if (!string.IsNullOrEmpty(continuationToken))
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return await FetchAlbumSearchPageAsync(query, continuationToken, cancellationToken);
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return await singleFlight.GetOrCreateAsync(
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AlbumSearchResultsCacheKey(query),
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TimeSpan.FromSeconds(configuration.SearchResultsCacheSeconds),
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() => FetchAlbumSearchPageAsync(query, continuationToken, cancellationToken));
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}
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private async Task<ErrorOr<YouTubeAlbumSearchResult>> FetchAlbumSearchPageAsync(string query, string continuationToken, CancellationToken cancellationToken)
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{
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var page = await FetchPageAsync(query, SearchCategory.Albums, continuationToken, cancellationToken);
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if (page.IsError)
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return page.Errors;
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var items = page.Value.Results
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.OfType<AlbumSearchResult>()
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.Select(ToAlbumResult)
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.ToList();
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return new YouTubeAlbumSearchResult(items, page.Value.NextToken);
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}
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public async Task<ErrorOr<YouTubeAlbumDetail>> GetAlbumAsync(string albumId, CancellationToken cancellationToken)
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{
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return await singleFlight.GetOrCreateAsync(
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AlbumCacheKey(albumId),
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TimeSpan.FromSeconds(configuration.SongInfoCacheSeconds),
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() => FetchAlbumAsync(albumId, cancellationToken));
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}
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private async Task<ErrorOr<YouTubeAlbumDetail>> FetchAlbumAsync(string albumId, CancellationToken cancellationToken)
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{
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try
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{
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var browseId = await client.GetAlbumBrowseIdAsync(albumId, cancellationToken);
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var info = await client.GetAlbumInfoAsync(browseId, cancellationToken);
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var album = new YouTubeAlbumResult(
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albumId,
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info.Name,
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string.Join(", ", info.Artists.Select(artist => artist.Name)),
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PickThumbnail(info.Thumbnails),
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info.ReleaseYear,
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info.IsSingle,
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info.IsEp,
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info.Artists
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.Select(artist => new YouTubeArtistRef(
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string.IsNullOrEmpty(artist.Id) ? null : artist.Id,
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artist.Name))
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.ToList());
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var tracks = info.Songs
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.Select((song, index) => new YouTubeAlbumTrack(
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song.Id ?? string.Empty,
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song.Name,
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(int)song.Duration.TotalSeconds,
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song.SongNumber ?? index + 1,
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song.IsExplicit))
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.Where(track => !string.IsNullOrEmpty(track.VideoId))
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.ToList();
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return new YouTubeAlbumDetail(
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album,
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StripWikipediaAttribution(info.Description),
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(int)info.Duration.TotalSeconds,
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tracks);
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}
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catch (Exception exception)
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{
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logger.LogError(exception, "Failed to load YouTube album '{AlbumId}'", albumId);
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return Error.Failure(description: $"Failed to load YouTube album '{albumId}': {exception.Message}");
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}
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}
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private static string StripWikipediaAttribution(string? description)
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{
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if (string.IsNullOrEmpty(description))
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return string.Empty;
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var markerIndex = description.IndexOf("From Wikipedia", StringComparison.OrdinalIgnoreCase);
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var cleaned = markerIndex >= 0 ? description[..markerIndex] : description;
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return cleaned.TrimEnd();
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}
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private YouTubeAlbumResult ToAlbumResult(AlbumSearchResult album) =>
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new(
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album.Id,
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album.Name,
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string.Join(", ", album.Artists.Select(artist => artist.Name)),
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PickThumbnail(album.Thumbnails),
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album.ReleaseYear,
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album.IsSingle,
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album.IsEp,
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album.Artists
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.Select(artist => new YouTubeArtistRef(
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string.IsNullOrEmpty(artist.Id) ? null : artist.Id,
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artist.Name))
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.ToList());
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public async Task<ErrorOr<YouTubeStreamInfo>> GetAudioStreamAsync(string videoId, CancellationToken cancellationToken)
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{
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var now = DateTime.UtcNow;
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if (cache.TryGetValue(StreamCacheKey(videoId), out CachedStreamInfo? cached)
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&& cached is not null
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&& cached.ExpiresAtUtc > now)
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{
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return new YouTubeStreamInfo(cached.Url, (int)(cached.ExpiresAtUtc - now).TotalSeconds);
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}
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StreamingData streamingData;
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try
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{
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streamingData = await client.GetStreamingDataAsync(videoId, cancellationToken);
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}
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catch (Exception exception)
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{
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logger.LogError(exception, "Failed to resolve YouTube stream for '{VideoId}'", videoId);
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return Error.Failure(description: $"Failed to resolve YouTube stream for '{videoId}': {exception.Message}");
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}
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var audioStream = streamingData.StreamInfo
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.OfType<AudioStreamInfo>()
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.OrderByDescending(stream => stream.Bitrate)
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.FirstOrDefault();
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if (audioStream is null || string.IsNullOrEmpty(audioStream.Url))
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return Error.NotFound(description: $"No audio stream available for '{videoId}'.");
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var expiresInSeconds = Math.Min(
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configuration.StreamUrlCacheSeconds,
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(int)streamingData.ExpiresIn.TotalSeconds);
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if (expiresInSeconds > 0)
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{
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cache.Set(
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StreamCacheKey(videoId),
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new CachedStreamInfo(audioStream.Url, now.AddSeconds(expiresInSeconds)),
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TimeSpan.FromSeconds(expiresInSeconds));
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}
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return new YouTubeStreamInfo(audioStream.Url, expiresInSeconds);
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}
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public async Task<ErrorOr<YouTubeSongResult>> GetSongAsync(string videoId, CancellationToken cancellationToken)
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{
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return await singleFlight.GetOrCreateAsync(
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SongInfoCacheKey(videoId),
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TimeSpan.FromSeconds(configuration.SongInfoCacheSeconds),
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() => FetchSongAsync(videoId, cancellationToken));
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}
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private async Task<ErrorOr<YouTubeSongResult>> FetchSongAsync(string videoId, CancellationToken cancellationToken)
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{
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try
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{
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var info = await client.GetSongVideoInfoAsync(videoId, cancellationToken);
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return new YouTubeSongResult(
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videoId,
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info.Name,
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string.Join(", ", info.Artists.Select(artist => artist.Name)),
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info.Album?.Name ?? string.Empty,
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(int)info.Duration.TotalSeconds,
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PickThumbnail(info.Thumbnails),
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info.IsExplicit,
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info.Artists
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.Select(artist => new YouTubeArtistRef(
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string.IsNullOrEmpty(artist.Id) ? null : artist.Id,
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artist.Name))
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.ToList());
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}
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catch (Exception exception)
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{
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logger.LogError(exception, "Failed to load YouTube song info for '{VideoId}'", videoId);
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return Error.Failure(description: $"Failed to load YouTube song info for '{videoId}': {exception.Message}");
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}
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}
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public string ResolveArtworkUrl(string thumbnailUrl) =>
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YouTubeThumbNailHelper.WithSize(thumbnailUrl, configuration.ArtworkSize);
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private string PickThumbnail(IEnumerable<YouTubeMusicAPI.Models.Thumbnail> thumbnails)
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{
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var ordered = thumbnails.OrderBy(thumbnail => thumbnail.Width).ToList();
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var square = ordered.Where(thumbnail => YouTubeThumbNailHelper.IsSquare(thumbnail.Url)).ToList();
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var candidates = square.Count > 0 ? square : ordered;
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var chosen = candidates.FirstOrDefault(thumbnail => thumbnail.Width >= configuration.ThumbnailSize)
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?? candidates.LastOrDefault();
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return chosen is null
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? string.Empty
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: YouTubeThumbNailHelper.WithSize(chosen.Url, configuration.ThumbnailSize);
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}
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private static string SearchCacheKey(string token) => $"yt-search:{token}";
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private static string SearchResultsCacheKey(string query) => $"yt-search-results:{query.Trim().ToLowerInvariant()}";
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private static string AlbumSearchResultsCacheKey(string query) => $"yt-album-search:{query.Trim().ToLowerInvariant()}";
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private static string AlbumCacheKey(string albumId) => $"yt-album:{albumId}";
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private static string SongInfoCacheKey(string videoId) => $"yt-song:{videoId}";
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private static string StreamCacheKey(string videoId) => $"yt-stream:{videoId}";
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}
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}
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