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/api/routes_image.go

@@ -12,7 +12,9 @@ import (
 	"github.com/stashapp/stash/pkg/utils"
 )
 
-type imageRoutes struct{}
+type imageRoutes struct {
+	txnManager models.TransactionManager
+}
 
 func (rs imageRoutes) Routes() chi.Router {
 	r := chi.NewRouter()
@@ -57,12 +59,16 @@ func ImageCtx(next http.Handler) http.Handler {
 		imageID, _ := strconv.Atoi(imageIdentifierQueryParam)
 
 		var image *models.Image
-		qb := models.NewImageQueryBuilder()
-		if imageID == 0 {
-			image, _ = qb.FindByChecksum(imageIdentifierQueryParam)
-		} else {
-			image, _ = qb.Find(imageID)
-		}
+		manager.GetInstance().TxnManager.WithReadTxn(r.Context(), func(repo models.ReaderRepository) error {
+			qb := repo.Image()
+			if imageID == 0 {
+				image, _ = qb.FindByChecksum(imageIdentifierQueryParam)
+			} else {
+				image, _ = qb.Find(imageID)
+			}
+
+			return nil
+		})
 
 		if image == nil {
 			http.Error(w, http.StatusText(404), 404)