Fix Spotify playlist injection: add dedicated route, startup fetch, and clarify config

.env.example

@@ -98,9 +98,9 @@ CACHE_DURATION_HOURS=1
 
 # ===== SPOTIFY PLAYLIST INJECTION (JELLYFIN ONLY) =====
 # REQUIRES: Jellyfin Spotify Import Plugin (https://github.com/Viperinius/jellyfin-plugin-spotify-import)
-# This feature injects virtual Spotify playlists (Release Radar, Discover Weekly) into Jellyfin
+# This feature intercepts Spotify Import plugin playlists (Release Radar, Discover Weekly) and fills them
 # with tracks auto-matched from external providers (SquidWTF, Deezer, Qobuz)
-# Uses JELLYFIN_URL and JELLYFIN_API_KEY for API access
+# Uses JELLYFIN_URL and JELLYFIN_API_KEY configured above (no separate credentials needed)
 
 # Enable Spotify playlist injection (optional, default: false)
 SPOTIFY_IMPORT_ENABLED=false

README.md

@@ -90,7 +90,7 @@ This project brings together all the music streaming providers into one unified
 - **Artist Deduplication**: Merges local and streaming artists to avoid duplicates
 - **Album Enrichment**: Adds missing tracks to local albums from streaming providers
 - **Cover Art Proxy**: Serves cover art for external content
-- **Spotify Playlist Injection** (Jellyfin only): Injects virtual Spotify playlists (Release Radar, Discover Weekly) with tracks auto-matched from streaming providers
+- **Spotify Playlist Injection** (Jellyfin only): Intercepts Spotify Import plugin playlists (Release Radar, Discover Weekly) and fills them with tracks auto-matched from streaming providers
 
 ## Supported Backends
 
@@ -290,7 +290,7 @@ Subsonic__EnableExternalPlaylists=false
 
 ### Spotify Playlist Injection (Jellyfin Only)
 
-Allstarr can inject virtual Spotify playlists (Release Radar, Discover Weekly) into Jellyfin with tracks automatically matched from your configured streaming provider.
+Allstarr can intercept Spotify Import plugin playlists (Release Radar, Discover Weekly) and fill them with tracks automatically matched from your configured streaming provider (SquidWTF, Deezer, or Qobuz).
 
 **Requirements:**
 - [Jellyfin Spotify Import Plugin](https://github.com/Viperinius/jellyfin-plugin-spotify-import) installed and configured
@@ -308,11 +308,12 @@ Allstarr can inject virtual Spotify playlists (Release Radar, Discover Weekly) i
 | `SpotifyImport:Playlists` | Array of playlists to inject (Name, SpotifyName, Enabled) |
 
 **How it works:**
-1. Jellyfin Spotify Import plugin runs daily and creates missing tracks files for playlists
+1. Jellyfin Spotify Import plugin runs daily and creates playlists + missing tracks files
-2. Allstarr fetches these files within the configured time window
+2. Allstarr fetches these missing tracks files within the configured time window
 3. For each missing track, Allstarr searches your streaming provider (SquidWTF, Deezer, or Qobuz)
-4. Virtual playlists appear in Jellyfin with matched tracks ready to stream
+4. When you open the playlist in Jellyfin, Allstarr intercepts the request and returns matched tracks
 5. Tracks are downloaded on-demand when played
+6. On startup, Allstarr will fetch missing tracks if it hasn't run in the last 24 hours
 
 **Environment variables:**
 ```bash

allstarr/Controllers/JellyfinController.cs

@@ -1210,6 +1210,17 @@ public class JellyfinController : ControllerBase
 
     #region Playlists
 
+    /// <summary>
+    /// Intercepts playlist items requests to inject Spotify playlists.
+    /// This route must have lower Order than the catch-all ProxyRequest route.
+    /// </summary>
+    [HttpGet("Playlists/{playlistId}/Items", Order = 5)]
+    public async Task<IActionResult> GetPlaylistItems(string playlistId)
+    {
+        _logger.LogInformation("GetPlaylistItems called for playlist {PlaylistId}", playlistId);
+        return await GetPlaylistTracks(playlistId);
+    }
+
     /// <summary>
     /// Gets playlist tracks displayed as an album.
     /// </summary>

allstarr/Services/Spotify/SpotifyMissingTracksFetcher.cs

@@ -13,6 +13,7 @@ public class SpotifyMissingTracksFetcher : BackgroundService
     private readonly IHttpClientFactory _httpClientFactory;
     private readonly RedisCacheService _cache;
     private readonly ILogger<SpotifyMissingTracksFetcher> _logger;
+    private bool _hasRunOnce = false;
 
     public SpotifyMissingTracksFetcher(
         IOptions<SpotifyImportSettings> spotifySettings,
@@ -47,6 +48,30 @@ public class SpotifyMissingTracksFetcher : BackgroundService
 
         _logger.LogInformation("Spotify missing tracks fetcher started");
 
+        // Run once on startup if we haven't run in the last 24 hours
+        if (!_hasRunOnce)
+        {
+            var shouldRunOnStartup = await ShouldRunOnStartupAsync();
+            if (shouldRunOnStartup)
+            {
+                _logger.LogInformation("Running initial fetch on startup");
+                try
+                {
+                    await FetchMissingTracksAsync(stoppingToken);
+                    _hasRunOnce = true;
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogError(ex, "Error during startup fetch");
+                }
+            }
+            else
+            {
+                _logger.LogInformation("Skipping startup fetch - already ran within last 24 hours");
+                _hasRunOnce = true;
+            }
+        }
+
         while (!stoppingToken.IsCancellationRequested)
         {
             try
@@ -62,6 +87,20 @@ public class SpotifyMissingTracksFetcher : BackgroundService
         }
     }
 
+    private async Task<bool> ShouldRunOnStartupAsync()
+    {
+        // Check if any playlist has cached data from the last 24 hours
+        foreach (var playlist in _spotifySettings.Value.Playlists.Where(p => p.Enabled))
+        {
+            var cacheKey = $"spotify:missing:{playlist.SpotifyName}";
+            if (await _cache.ExistsAsync(cacheKey))
+            {
+                return false; // Already have recent data
+            }
+        }
+        return true; // No recent data, should fetch
+    }
+
     private async Task FetchMissingTracksAsync(CancellationToken cancellationToken)
     {
         var settings = _spotifySettings.Value;