Centralized artwork lookup logic for playlists

src/libs/services/artwork/impl/ArtworkService.cpp

@@ -260,6 +260,26 @@ namespace lms::cover
         return res;
     }
 
+    ArtworkService::ImageFindResult ArtworkService::findTrackListImage(db::TrackListId trackListId)
+    {
+        db::Session& session{ _db.getTLSSession() };
+        auto transaction{ session.createReadTransaction() };
+
+        ImageFindResult res;
+
+        db::TrackEmbeddedImage::FindParameters params;
+        params.setTrackList(trackListId);
+        params.setIsPreferred(true);
+        params.setSortMethod(db::TrackEmbeddedImageSortMethod::FrontCoverAndSize);
+        params.setRange(db::Range{ .offset = 0, .size = 1 });
+
+        db::TrackEmbeddedImage::find(session, params, [&](const db::TrackEmbeddedImage::pointer& image) {
+            res = image->getId();
+        });
+
+        return res;
+    }
+
     std::shared_ptr<image::IEncodedImage> ArtworkService::getImage(db::ImageId imageId, std::optional<image::ImageSize> width)
     {
         const ImageCache::EntryDesc cacheEntryDesc{ imageId, width };

src/libs/services/artwork/impl/ArtworkService.hpp

@@ -50,6 +50,7 @@ namespace lms::cover
         ImageFindResult findArtistImage(db::ArtistId artistId) override;
         ImageFindResult findPreferredTrackImage(db::TrackId trackId) override;
         ImageFindResult findReleaseImage(db::ReleaseId releaseId) override;
+        ImageFindResult findTrackListImage(db::TrackListId trackListId) override;
 
         std::shared_ptr<image::IEncodedImage> getImage(db::ImageId imageId, std::optional<image::ImageSize> width) override;
         std::shared_ptr<image::IEncodedImage> getTrackEmbeddedImage(db::TrackEmbeddedImageId trackEmbeddedImageId, std::optional<image::ImageSize> width) override;

src/libs/services/artwork/include/services/artwork/IArtworkService.hpp

@@ -29,6 +29,7 @@
 #include "database/ReleaseId.hpp"
 #include "database/TrackEmbeddedImageId.hpp"
 #include "database/TrackId.hpp"
+#include "database/TrackListId.hpp"
 #include "image/IEncodedImage.hpp"
 
 namespace lms::db
@@ -48,6 +49,7 @@ namespace lms::cover
         virtual ImageFindResult findArtistImage(db::ArtistId artistId) = 0;
         virtual ImageFindResult findPreferredTrackImage(db::TrackId trackId) = 0;
         virtual ImageFindResult findReleaseImage(db::ReleaseId releaseId) = 0;
+        virtual ImageFindResult findTrackListImage(db::TrackListId trackListId) = 0;
 
         // Image retrieval
         virtual std::shared_ptr<image::IEncodedImage> getImage(db::ImageId imageId, std::optional<image::ImageSize> width) = 0;