Quiz.txt

Question Controller
package com.mawule.quizapp.controller;

import com.mawule.quizapp.model.Question;
import com.mawule.quizapp.service.QuestionService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.util.Collections;
import java.util.List;

@RestController
@RequestMapping("question")
public class QuestionController{
    @Autowired
    QuestionService questionService;

    @GetMapping("allQuestions")
    public ResponseEntity<List<Question>> getAllQuestions() {
        try {
            return questionService.getAllQuestions();
        } catch (Exception e) {
            e.printStackTrace(); // Log the exception for debugging purposes
            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
                    .body(Collections.emptyList());
        }
    }


    @GetMapping("category/{category}")
    public List<Question> getQuestionsByCategory(@PathVariable String category){

        return (List<Question>) questionService.getQuestionsByCategory(category);
    }

    @PostMapping("add")
    public ResponseEntity<String> addQuestion(@RequestBody Question question){
        return questionService.addquestion(question);
    }

    @DeleteMapping("delete")
    public ResponseEntity<String> updateQuestion(Question question){

        return questionService.deletequestion(question);
    }


}




Question Service
package com.mawule.quizapp.service;

import com.mawule.quizapp.dao.QuestionDao;
import com.mawule.quizapp.dao.QuizDao;
import com.mawule.quizapp.model.Question;
import com.mawule.quizapp.model.QuestionWrapper;
import com.mawule.quizapp.model.Quiz;
import com.mawule.quizapp.model.Response;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

@Service
public class QuizService {

    @Autowired
    QuizDao quizDao;

    @Autowired
    QuestionDao questiondao;
    public ResponseEntity<String> createquiz(String category, int numQ, String title) {
        List<Question> questions = questiondao.findRandomQuestionsByCategory(category,numQ);
        Quiz quiz = new Quiz();
        quiz.setTitle(title);
        quiz.setQuestions(questions);
        quizDao.save(quiz);

        return new ResponseEntity<>("sucess", HttpStatus.CREATED);



    }

    public ResponseEntity<List<QuestionWrapper>> getQuizQuestions(Integer id){
        Optional<Quiz> quiz = quizDao.findById(id);
        List<Question> questionsFromDb = quiz.get().getQuestions();
        List<QuestionWrapper> questionsForUser = new ArrayList<>();
        for(Question q : questionsFromDb){
            QuestionWrapper qw = new QuestionWrapper(q.getId(),q.getQuestionTitle(),q.getOption1(),q.getOption2(),q.getOption3(),q.getOption4());
            questionsForUser.add(qw);
        }

        return new ResponseEntity<>(questionsForUser, HttpStatus.OK);

    }

    public ResponseEntity<Integer> calculateResult(Integer id, List<Response> responses){
        Quiz quiz =  quizDao.findById(id).get();
        List<Question> questions = quiz.getQuestions();
        int right = 0;
        int i = 0;
        for(Response response : responses){
            if(response.getResponse().equals(questions.get(i).getRightAnswer()))
                right++;
            i++;
        }

        return new ResponseEntity<>(right, HttpStatus.OK);
    }
}