Optimized artwork association with tracks

src/libs/database/impl/Artwork.cpp

@@ -27,6 +27,7 @@
 
 #include "Utils.hpp"
 #include "traits/IdTypeTraits.hpp"
+#include "traits/PathTraits.hpp"
 
 namespace lms::db
 {
@@ -87,4 +88,17 @@ namespace lms::db
 
         return utils::fetchQuerySingleResult(query);
     }
+
+    std::filesystem::path Artwork::getAbsoluteFilePath() const
+    {
+        auto query{ session()->query<std::filesystem::path>("SELECT COALESCE(image.absolute_file_path, track.absolute_file_path) AS absolute_file_path FROM artwork") };
+        query.leftJoin("image ON artwork.image_id = image.id");
+        query.leftJoin("track_embedded_image ON artwork.track_embedded_image_id = track_embedded_image.id");
+        query.leftJoin("track_embedded_image_link ON track_embedded_image.id = track_embedded_image_link.track_embedded_image_id");
+        query.leftJoin("track ON track.id = track_embedded_image_link.track_id");
+        query.limit(1); // there may be several tracks matching this artwork...
+        query.where("artwork.id = ?").bind(getId());
+
+        return utils::fetchQuerySingleResult(query);
+    }
 } // namespace lms::db

src/libs/database/impl/Session.cpp

@@ -234,6 +234,7 @@ namespace lms::db
             utils::executeCommand(_session, "CREATE INDEX IF NOT EXISTS track_embedded_image_link_id_idx ON track_embedded_image_link(id)");
             utils::executeCommand(_session, "CREATE INDEX IF NOT EXISTS track_embedded_image_link_track_id_idx ON track_embedded_image_link(track_id)");
             utils::executeCommand(_session, "CREATE INDEX IF NOT EXISTS track_embedded_image_link_track_embedded_image_id_track_id_idx ON track_embedded_image_link(track_embedded_image_id, track_id)");
+            utils::executeCommand(_session, "CREATE INDEX IF NOT EXISTS track_embedded_image_link_track_type_track_embedded_image_id_idx ON track_embedded_image_link(track_id, type, track_embedded_image_id)");
             utils::executeCommand(_session, "CREATE INDEX IF NOT EXISTS track_embedded_image_link_type_track_embedded_image_id_track_id_idx ON track_embedded_image_link(type,track_embedded_image_id,track_id)");
 
             utils::executeCommand(_session, "CREATE INDEX IF NOT EXISTS image_directory_stem_idx ON image(directory_id, stem COLLATE NOCASE)");

src/libs/database/include/database/Artwork.hpp

@@ -19,6 +19,8 @@
 
 #pragma once
 
+#include <filesystem>
+
 #include <Wt/Dbo/Dbo.h>
 #include <Wt/WDateTime.h>
 
@@ -48,6 +50,7 @@ namespace lms::db
         TrackEmbeddedImageId getTrackEmbeddedImageId() const { return _trackEmbeddedImage.id(); }
         ImageId getImageId() const { return _image.id(); }
         Wt::WDateTime getLastWrittenTime() const;
+        std::filesystem::path getAbsoluteFilePath() const;
 
         template<class Action>
         void persist(Action& a)

src/libs/database/include/database/TrackEmbeddedImageLink.hpp

@@ -40,8 +40,6 @@ namespace lms::db
     public:
         TrackEmbeddedImageLink() = default;
 
-        using HashType = std::uint64_t;
-
         // find
         static std::size_t getCount(Session& session);
         static pointer find(Session& session, TrackEmbeddedImageLinkId id);

src/libs/database/test/Artwork.cpp

@@ -48,11 +48,13 @@ namespace lms::db::tests
         {
             auto transaction{ session.createWriteTransaction() };
             image.get().modify()->setLastWriteTime(dateTime);
+            image.get().modify()->setAbsoluteFilePath("/tmp/foo");
         }
 
         {
             auto transaction{ session.createReadTransaction() };
             EXPECT_EQ(artwork.get()->getLastWrittenTime(), dateTime);
+            EXPECT_EQ(artwork.get()->getAbsoluteFilePath(), "/tmp/foo");
         }
     }
 
@@ -73,11 +75,13 @@ namespace lms::db::tests
             auto transaction{ session.createWriteTransaction() };
             session.create<db::TrackEmbeddedImageLink>(track.get(), image.get());
             track.get().modify()->setLastWriteTime(dateTime);
+            track.get().modify()->setAbsoluteFilePath("/tmp/foo");
         }
 
         {
             auto transaction{ session.createReadTransaction() };
             EXPECT_EQ(artwork.get()->getLastWrittenTime(), dateTime);
+            EXPECT_EQ(artwork.get()->getAbsoluteFilePath(), "/tmp/foo");
         }
     }
 } // namespace lms::db::tests