Data layer restructuring (#997)

* Move query builders to sqlite package
* Add transaction system
* Wrap model resolvers in transaction
* Add error return value for StringSliceToIntSlice
* Update/refactor mutation resolvers
* Convert query builders
* Remove unused join types
* Add stash id unit tests
* Use WAL journal mode

pkg/scene/update.go

@@ -0,0 +1,85 @@
+package scene
+
+import (
+	"database/sql"
+
+	"github.com/stashapp/stash/pkg/models"
+	"github.com/stashapp/stash/pkg/utils"
+)
+
+func UpdateFormat(qb models.SceneWriter, id int, format string) (*models.Scene, error) {
+	return qb.Update(models.ScenePartial{
+		ID: id,
+		Format: &sql.NullString{
+			String: format,
+			Valid:  true,
+		},
+	})
+}
+
+func UpdateOSHash(qb models.SceneWriter, id int, oshash string) (*models.Scene, error) {
+	return qb.Update(models.ScenePartial{
+		ID: id,
+		OSHash: &sql.NullString{
+			String: oshash,
+			Valid:  true,
+		},
+	})
+}
+
+func UpdateChecksum(qb models.SceneWriter, id int, checksum string) (*models.Scene, error) {
+	return qb.Update(models.ScenePartial{
+		ID: id,
+		Checksum: &sql.NullString{
+			String: checksum,
+			Valid:  true,
+		},
+	})
+}
+
+func UpdateFileModTime(qb models.SceneWriter, id int, modTime models.NullSQLiteTimestamp) (*models.Scene, error) {
+	return qb.Update(models.ScenePartial{
+		ID:          id,
+		FileModTime: &modTime,
+	})
+}
+
+func AddPerformer(qb models.SceneReaderWriter, id int, performerID int) (bool, error) {
+	performerIDs, err := qb.GetPerformerIDs(id)
+	if err != nil {
+		return false, err
+	}
+
+	oldLen := len(performerIDs)
+	performerIDs = utils.IntAppendUnique(performerIDs, performerID)
+
+	if len(performerIDs) != oldLen {
+		if err := qb.UpdatePerformers(id, performerIDs); err != nil {
+			return false, err
+		}
+
+		return true, nil
+	}
+
+	return false, nil
+}
+
+func AddTag(qb models.SceneReaderWriter, id int, tagID int) (bool, error) {
+	tagIDs, err := qb.GetTagIDs(id)
+	if err != nil {
+		return false, err
+	}
+
+	oldLen := len(tagIDs)
+	tagIDs = utils.IntAppendUnique(tagIDs, tagID)
+
+	if len(tagIDs) != oldLen {
+		if err := qb.UpdateTags(id, tagIDs); err != nil {
+			return false, err
+		}
+
+		return true, nil
+	}
+
+	return false, nil
+}