update question

SurveyBackend/SurveyBackend.API/Mappers/QuestionMapper.cs

@@ -60,6 +60,34 @@ public static class QuestionMapper
         };
     }
 
+    public static QuestionBase QuestionUpdateToModel(QuestionCreateDto dto, int surveyId, int questionId)
+    {
+        return dto.QuestionType.ToLower() switch
+        {
+            "textquestion" => new TextQuestion
+            {
+                Id = questionId,
+                Title = dto.Title,
+                SurveyId = surveyId,
+            },
+            "singleanswerquestion" => new SingleAnswerQuestion
+            {
+                Id = questionId,
+                Title = dto.Title,
+                SurveyId = surveyId,
+                AnswerVariants = [],
+            },
+            "multipleanswerquestion" => new MultipleAnswerQuestion
+            {
+                Id = questionId,
+                Title = dto.Title,
+                SurveyId = surveyId,
+                AnswerVariants = []
+            },
+            _ => throw new BadRequestException("Unknown question type")
+        };
+    }
+
     private static List<OutputAnswerVariantDto> AnswerVariantsToDto(IEnumerable<AnswerVariant> answerVariants)
     {
         return answerVariants.Select(av => new OutputAnswerVariantDto