improving by extracting common userID method

backend/models/lists.go

@@ -105,6 +105,29 @@ func (m ListModel) List(ctx context.Context, userId uuid.UUID) ([]ListWithItems,
 	return lists, err
 }
 
+type ImageWithSchema struct {
+	model.ImageLists
+
+	Items []model.ImageSchemaItems
+}
+
+func (m ListModel) ListItems(ctx context.Context, listID uuid.UUID) ([]ImageWithSchema, error) {
+	getListItems := SELECT(
+		ImageLists.AllColumns,
+		ImageSchemaItems.AllColumns,
+	).
+		FROM(
+			ImageLists.
+				INNER_JOIN(ImageSchemaItems, ImageSchemaItems.ImageID.EQ(ImageLists.ImageID)),
+		).
+		WHERE(ImageLists.ListID.EQ(UUID(listID)))
+
+	listItems := make([]ImageWithSchema, 0)
+	err := getListItems.QueryContext(ctx, m.dbPool, &listItems)
+
+	return listItems, err
+}
+
 type IDValue struct {
 	ID    string `json:"id"`
 	Value string `json:"value"`

backend/stacks/handler.go

@@ -10,39 +10,83 @@ import (
 
 	"github.com/charmbracelet/log"
 	"github.com/go-chi/chi/v5"
+	"github.com/google/uuid"
 )
 
+func writeJsonOrError[K any](logger *log.Logger, object K, w http.ResponseWriter) {
+	jsonObject, err := json.Marshal(object)
+	if err != nil {
+		logger.Warn("could not marshal json object", "err", err)
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	w.Write(jsonObject)
+	w.WriteHeader(http.StatusOK)
+}
+
 type StackHandler struct {
 	logger     *log.Logger
 	stackModel models.ListModel
 }
 
-func (h *StackHandler) getAllStacks(w http.ResponseWriter, r *http.Request) {
+func (h *StackHandler) withUserID(
+	fn func(userID uuid.UUID, w http.ResponseWriter, r *http.Request),
+) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		ctx := r.Context()
+
+		userID, err := middleware.GetUserID(ctx)
+		if err != nil {
+			h.logger.Warn("could not get users in get all stacks", "err", err)
+			w.WriteHeader(http.StatusUnauthorized)
+			return
+		}
+
+		fn(userID, w, r)
+	}
+}
+
+func (h *StackHandler) getAllStacks(userID uuid.UUID, w http.ResponseWriter, r *http.Request) {
 	ctx := r.Context()
 
-	userId, err := middleware.GetUserID(ctx)
-	if err != nil {
-		h.logger.Warn("could not get users in get all stacks", "err", err)
-		w.WriteHeader(http.StatusUnauthorized)
-		return
-	}
-
-	lists, err := h.stackModel.List(ctx, userId)
+	lists, err := h.stackModel.List(ctx, userID)
 	if err != nil {
 		h.logger.Warn("could not get stacks", "err", err)
 		w.WriteHeader(http.StatusBadRequest)
 		return
 	}
 
-	jsonLists, err := json.Marshal(lists)
-	if err != nil {
-		h.logger.Warn("could not marshal json lists", "err", err)
+	writeJsonOrError(h.logger, lists, w)
+}
+
+func (h *StackHandler) getStackItems(userID uuid.UUID, w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+
+	listID := r.PathValue("listID")
+	if len(listID) == 0 {
+		h.logger.Warn("listID is not present in path")
 		w.WriteHeader(http.StatusBadRequest)
 		return
 	}
 
-	w.Write(jsonLists)
-	w.WriteHeader(http.StatusOK)
+	uuidListID, err := uuid.Parse(listID)
+	if err != nil {
+		h.logger.Warn("could not parse list id uuid", "err", err)
+		w.WriteHeader(http.StatusUnauthorized)
+		return
+	}
+
+	// TODO: must check for permission here.
+
+	lists, err := h.stackModel.ListItems(ctx, uuidListID)
+	if err != nil {
+		h.logger.Warn("could not get list items", "err", err)
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	writeJsonOrError(h.logger, lists, w)
 }
 
 func (h *StackHandler) CreateRoutes(r chi.Router) {
@@ -52,7 +96,8 @@ func (h *StackHandler) CreateRoutes(r chi.Router) {
 		r.Use(middleware.ProtectedRoute)
 		r.Use(middleware.SetJson)
 
-		r.Get("/", h.getAllStacks)
+		r.Get("/", h.withUserID(h.getAllStacks))
+		r.Get("/{listID}", h.withUserID(h.getStackItems))
 	})
 }