fix

server/internal/handlers/handlers_seating.go

@@ -75,6 +75,65 @@ func DeleteClassSeatingLayoutHandler(db *gorm.DB) fiber.Handler {
 	}
 }
 
+// GET /exam-rooms/:id/seating-layout
+func GetExamSeatingLayoutHandler(db *gorm.DB) fiber.Handler {
+	return func(c *fiber.Ctx) error {
+		examID, err := strconv.ParseUint(c.Params("id"), 10, 64)
+		if err != nil {
+			return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Invalid exam room ID"})
+		}
+		var layout models.ExamSeatingLayout
+		if err := db.Where("exam_room_id = ?", examID).First(&layout).Error; err != nil {
+			if errors.Is(err, gorm.ErrRecordNotFound) {
+				return c.JSON(fiber.Map{"layoutJson": nil})
+			}
+			return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": err.Error()})
+		}
+		return c.JSON(fiber.Map{"layoutJson": layout.LayoutJSON})
+	}
+}
+
+// PUT /exam-rooms/:id/seating-layout
+func PutExamSeatingLayoutHandler(db *gorm.DB) fiber.Handler {
+	return func(c *fiber.Ctx) error {
+		examID, err := strconv.ParseUint(c.Params("id"), 10, 64)
+		if err != nil {
+			return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Invalid exam room ID"})
+		}
+		var body struct {
+			LayoutJSON string `json:"layoutJson"`
+		}
+		if err := c.BodyParser(&body); err != nil || body.LayoutJSON == "" {
+			return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "layoutJson is required"})
+		}
+		layout := models.ExamSeatingLayout{
+			ExamRoomID: uint(examID),
+			LayoutJSON: body.LayoutJSON,
+			UpdatedAt:  time.Now(),
+		}
+		result := db.Clauses(clause.OnConflict{
+			Columns:   []clause.Column{{Name: "exam_room_id"}},
+			DoUpdates: clause.AssignmentColumns([]string{"layout_json", "updated_at"}),
+		}).Create(&layout)
+		if result.Error != nil {
+			return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": result.Error.Error()})
+		}
+		return c.JSON(fiber.Map{"ok": true})
+	}
+}
+
+// DELETE /exam-rooms/:id/seating-layout
+func DeleteExamSeatingLayoutHandler(db *gorm.DB) fiber.Handler {
+	return func(c *fiber.Ctx) error {
+		examID, err := strconv.ParseUint(c.Params("id"), 10, 64)
+		if err != nil {
+			return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Invalid exam room ID"})
+		}
+		db.Where("exam_room_id = ?", examID).Delete(&models.ExamSeatingLayout{})
+		return c.JSON(fiber.Map{"ok": true})
+	}
+}
+
 // GET /staff/my-classes
 func GetMyClassesHandler(db *gorm.DB) fiber.Handler {
 	return func(c *fiber.Ctx) error {