going to question management

SurveyBackend/SurveyBackend.Services/Exceptions/BadRequestException.cs

@@ -0,0 +1,10 @@
+namespace SurveyBackend.Services.Exceptions;
+
+public class BadRequestException : ServiceException
+{
+    public override int StatusCode => 400;
+
+    public BadRequestException(string message) : base(message)
+    {
+    }
+}

SurveyBackend/SurveyBackend.Services/Services/QuestionService.cs

@@ -0,0 +1,54 @@
+using SurveyBackend.Core.Contexts;
+using SurveyBackend.Services.Exceptions;
+using SurveyLib.Core.Models;
+using SurveyLib.Core.Repositories;
+using SurveyLib.Core.Services;
+
+namespace SurveyBackend.Services.Services;
+
+public class QuestionService : IQuestionService
+{
+    private readonly IQuestionRepository _questionRepository;
+
+    public QuestionService(IQuestionRepository questionRepository, IUserContext userContext)
+    {
+        _questionRepository = questionRepository;
+    }
+
+    public async Task AddQuestionAsync(QuestionBase question)
+    {
+        await _questionRepository.AddAsync(question);
+    }
+
+    public async Task UpdateQuestionAsync(QuestionBase question)
+    {
+        await _questionRepository.UpdateAsync(question);
+    }
+
+    public async Task DeleteQuestionAsync(int id)
+    {
+        var question = await _questionRepository.GetByIdAsync(id);
+        if (question is null)
+        {
+            throw new NotFoundException("Question not found");
+        }
+
+        await _questionRepository.DeleteAsync(question);
+    }
+
+    public async Task<QuestionBase> GetQuestionByIdAsync(int id)
+    {
+        var question = await _questionRepository.GetByIdAsync(id);
+        if (question is null)
+        {
+            throw new NotFoundException("Question not found");
+        }
+
+        return question;
+    }
+
+    public async Task<IEnumerable<QuestionBase>> GetQuestionsBySurveyIdAsync(int surveyId)
+    {
+        return await _questionRepository.GetQuestionsBySurveyId(surveyId);
+    }
+}

SurveyBackend/SurveyBackend.Services/Services/SurveyService.cs

@@ -42,6 +42,8 @@ public class SurveyService : ISurveyService
         {
             throw new UnauthorizedAccessException("You are not authorized to delete this survey.");
         }
+
+        await _surveyRepository.DeleteAsync(survey);
     }
 
     public async Task<IEnumerable<Survey>> GetSurveysAsync()