feat: 퀴즈 추가

frontend/src/assets/icons/close.svg

@@ -0,0 +1,5 @@
+<svg width="32" height="33" viewBox="0 0 32 33" fill="none" xmlns="http://www.w3.org/2000/svg">
+<g id="X">
+<path id="Icon" d="M24 8.5L8 24.5M8 8.5L24 24.5" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"/>
+</g>
+</svg>

frontend/src/components/ChatRoom/ChatRoom.jsx

@@ -1,11 +1,23 @@
 import styles from './ChatRoom.module.css';
 import SendIcon from '/src/assets/icons/send.svg?react';
-import { cloneElement, useEffect, useRef } from 'react';
+import { cloneElement, Suspense, useEffect, useRef, useState } from 'react';
 import { ChatEntry, useChat, useMaybeLayoutContext } from '@livekit/components-react';
+import { useParams } from 'react-router-dom';
+import useChatRoom from '../../hooks/chat/useChatRoom';
+import { createPortal } from 'react-dom';
+import { QuizModal } from '../QuizModal';
+import { QuizSet } from '../QuizSet';
 
-export default function ChatRoom({ ...props }) {
+export default function ChatRoom({ isTeacher, ...props }) {
+  const { roomId } = useParams();
+  const wsChat = useChatRoom(roomId);
   const chatInputRef = useRef(null);
   const ulRef = useRef(null);
+  const [isQuizModalOpen, setIsQuizModalOpen] = useState(false);
+
+  const openQuizModal = () => {
+    setIsQuizModalOpen(true);
+  };
 
   const { send, chatMessages, isSending } = useChat();
 
@@ -54,59 +66,94 @@ export default function ChatRoom({ ...props }) {
   }, [chatMessages, layoutContext, layoutContext.widget]);
 
   return (
-    <div
-      {...props}
-      className="lk-chat"
-    >
-      <h2 className={styles.title}>채팅</h2>
-
-      <ul
-        className="lk-list lk-chat-messages"
-        ref={ulRef}
+    <>
+      <div
+        {...props}
+        className={`lk-chat ${wsChat.quizSetId ? styles.none : ''}`}
       >
-        {props.children
-          ? chatMessages.map((msg, idx) =>
-              cloneElement(props.children, {
-                entry: msg,
-                key: msg.id ?? idx,
-              })
-            )
-          : chatMessages.map((msg, idx, allMsg) => {
-              const hideName = idx >= 1 && allMsg[idx - 1].from === msg.from;
-              const hideTimestamp = idx >= 1 && msg.timestamp - allMsg[idx - 1].timestamp < 60_000;
+        <header className={styles.header}>
+          <h2 className={styles.title}>채팅</h2>
+          {isTeacher && (
+            <button
+              className={styles.quizButton}
+              onClick={openQuizModal}
+            >
+              퀴즈 시작
+            </button>
+          )}
+        </header>
 
-              return (
-                <ChatEntry
-                  key={msg.id ?? idx}
-                  hideName={hideName}
-                  hideTimestamp={hideName === false ? false : hideTimestamp}
-                  entry={msg}
-                />
-              );
-            })}
-      </ul>
-      <form
-        className="lk-chat-form"
-        onSubmit={handleChatSubmit}
-      >
-        <input
-          className="lk-form-control lk-chat-form-input"
-          disabled={isSending}
-          ref={chatInputRef}
-          type="text"
-          placeholder="메시지"
-          onInput={(ev) => ev.stopPropagation()}
-          onKeyDown={(ev) => ev.stopPropagation()}
-          onKeyUp={(ev) => ev.stopPropagation()}
-        />
-        <button
-          type="submit"
-          className={`lk-button lk-chat-form-button ${styles.button}`}
-          disabled={isSending}
+        <ul
+          className="lk-list lk-chat-messages"
+          ref={ulRef}
         >
-          <SendIcon />
-        </button>
-      </form>
-    </div>
+          {props.children
+            ? chatMessages.map((msg, idx) =>
+                cloneElement(props.children, {
+                  entry: msg,
+                  key: msg.id ?? idx,
+                })
+              )
+            : chatMessages.map((msg, idx, allMsg) => {
+                const hideName = idx >= 1 && allMsg[idx - 1].from === msg.from;
+                const hideTimestamp = idx >= 1 && msg.timestamp - allMsg[idx - 1].timestamp < 60_000;
+
+                return (
+                  <ChatEntry
+                    key={msg.id ?? idx}
+                    hideName={hideName}
+                    hideTimestamp={hideName === false ? false : hideTimestamp}
+                    entry={msg}
+                  />
+                );
+              })}
+        </ul>
+        <form
+          className="lk-chat-form"
+          onSubmit={handleChatSubmit}
+        >
+          <input
+            className="lk-form-control lk-chat-form-input"
+            disabled={isSending}
+            ref={chatInputRef}
+            type="text"
+            placeholder="메시지"
+            onInput={(ev) => ev.stopPropagation()}
+            onKeyDown={(ev) => ev.stopPropagation()}
+            onKeyUp={(ev) => ev.stopPropagation()}
+          />
+          <button
+            type="submit"
+            className={`lk-button lk-chat-form-button ${styles.button}`}
+            disabled={isSending}
+          >
+            <SendIcon />
+          </button>
+        </form>
+      </div>
+      {wsChat.quizSetId && (
+        <div className="lk-chat">
+          <header className={styles.header}>
+            <h2 className={styles.title}>퀴즈</h2>
+          </header>
+          <Suspense fallback={<></>}>
+            <QuizSet
+              quizSetId={wsChat.quizSetId}
+              finish={() => wsChat.setQuizSetId(null)}
+            />
+          </Suspense>
+        </div>
+      )}
+
+      {isQuizModalOpen &&
+        createPortal(
+          <QuizModal
+            startQuiz={wsChat.startQuiz}
+            quizSets={wsChat.quizSets}
+            closeModal={() => setIsQuizModalOpen(false)}
+          />,
+          document.body
+        )}
+    </>
   );
 }

frontend/src/components/ChatRoom/ChatRoom.module.css

@@ -8,9 +8,39 @@
   overflow-y: hidden;
 }
 
+.header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 16px;
+
+  & > .quizButton {
+    border-radius: 8px;
+    border: none;
+    padding: 8px 12px;
+    cursor: pointer;
+    font-size: 16px;
+    line-height: 1.4;
+    font-weight: 700;
+    border: 1px solid var(--border-color-tertiary);
+    background-color: #1e1e1e;
+    transition:
+      background-color 0.2s,
+      scale 0.1s;
+
+    &:hover,
+    &:active {
+      background-color: #2b2b2b;
+    }
+
+    &:active {
+      scale: 0.95;
+    }
+  }
+}
+
 .title {
   margin: 0;
-  padding: 16px;
 }
 
 .messageList {
@@ -133,3 +163,7 @@
 .button {
   stroke: white;
 }
+
+.none {
+  display: none !important;
+}

frontend/src/components/ClassCard/ClassCard.jsx

@@ -1,6 +1,7 @@
 import { Link } from 'react-router-dom';
 import styles from './ClassCard.module.css';
 import CompassIcon from '/src/assets/icons/compass.svg?react';
+import { STATIC_URL } from '../../constants';
 
 export default function ClassCard({ img, path, children }) {
   return (
@@ -10,7 +11,7 @@ export default function ClassCard({ img, path, children }) {
     >
       {img ? (
         <img
-          src={`${import.meta.env.VITE_STATIC_URL}${img}`}
+          src={`${STATIC_URL}${img}`}
           alt="강의 이미지"
           className={styles.thumbnail}
         />

frontend/src/components/LiveRoom/LiveRoom.jsx

@@ -120,7 +120,7 @@ export default function LiveRoom() {
               controls={{ chat: false, leave: true, screenShare: role === '강사' }}
             />
           </div>
-          <ChatRoom />
+          <ChatRoom isTeacher={role === '강사'} />
         </LayoutContextProvider>
         <RoomAudioRenderer />
         <ConnectionStateToast />

frontend/src/components/Quiz/Quiz.jsx

@@ -0,0 +1,49 @@
+import { useState } from 'react';
+import { STATIC_URL } from '../../constants';
+import styles from './Quiz.module.css';
+
+export default function Quiz({ question, step, image, choices = [], setAnswers }) {
+  const [answer, setAnswer] = useState(null);
+  const isChoice = choices.length > 0;
+
+  return (
+    <div className={styles.quiz}>
+      <header className={styles.header}>
+        <h1>{question}</h1>
+        {image && (
+          <img
+            src={`${STATIC_URL}${image}`}
+            alt="문제 이미지"
+          />
+        )}
+      </header>
+      <div className={styles.choiceWrapper}>
+        {isChoice ? (
+          choices.map(({ id, num, content }) => (
+            <div
+              key={id}
+              onClick={() => {
+                setAnswer(num);
+                setAnswers(num);
+              }}
+              className={`${styles.choice} ${answer === num ? styles.active : ''}`}
+            >
+              <span className={styles.number}>{num}</span>
+              <span>{content}</span>
+            </div>
+          ))
+        ) : (
+          <input
+            type="text"
+            autoFocus
+            placeholder="답 입력"
+            onChange={(e) =>
+              setAnswers((prev) => prev.map((value, index) => (index === step ? e.target.value : value)))
+            }
+            className={styles.input}
+          />
+        )}
+      </div>
+    </div>
+  );
+}

frontend/src/components/Quiz/Quiz.module.css

@@ -0,0 +1,78 @@
+@keyframes show {
+  from {
+    opacity: 0;
+    transform: translateY(20px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.quiz {
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between;
+  width: 100%;
+  height: 100%;
+  padding: 0 16px;
+  box-sizing: border-box;
+}
+
+.header {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  animation: show 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
+
+  & > h1 {
+    font-size: 24px;
+    font-style: normal;
+    font-weight: 700;
+    line-height: 1.2;
+  }
+
+  & > img {
+    width: 100%;
+    height: auto;
+    max-height: 200px;
+    object-fit: contain;
+  }
+}
+
+.choiceWrapper {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  animation: show 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.5s forwards;
+  opacity: 0;
+}
+
+.choice {
+  display: flex;
+  gap: 20px;
+  padding: 12px 20px;
+  border-radius: 8px;
+  border: 1px solid var(--border-color-tertiary);
+  font-size: 16px;
+  font-style: normal;
+  font-weight: 400;
+  line-height: 1.4;
+  box-sizing: border-box;
+  cursor: pointer;
+
+  & > .number {
+    font-weight: 700;
+  }
+
+  &.active {
+    border-color: var(--primary-color);
+    color: var(--primary-color);
+  }
+}
+
+.input {
+  padding: 12px 16px;
+  border-radius: 8px;
+  border: 1px solid var(--border-color-tertiary);
+}

frontend/src/components/Quiz/index.js

@@ -0,0 +1 @@
+export { default as Quiz } from './Quiz';

frontend/src/components/QuizModal/QuizModal.jsx

@@ -0,0 +1,45 @@
+import styles from './QuizModal.module.css';
+import { useRef } from 'react';
+import CloseIcon from '/src/assets/icons/close.svg?react';
+
+export default function QuizModal({ startQuiz, quizSets, closeModal }) {
+  const wrapperRef = useRef(null);
+
+  const handleClick = (e) => {
+    if (e.target === wrapperRef.current) {
+      closeModal();
+    }
+  };
+
+  return (
+    <div
+      className={styles.wrapper}
+      onClick={handleClick}
+      ref={wrapperRef}
+    >
+      <div className={styles.modal}>
+        <header className={styles.title}>
+          <div>퀴즈 선택</div>
+          <button onClick={closeModal}>
+            <CloseIcon />
+          </button>
+        </header>
+        <ul className={styles.list}>
+          {quizSets.map((quizSet) => (
+            <li
+              key={quizSet.quizSetId}
+              onClick={() => {
+                console.log(quizSet.quizSetId);
+                startQuiz(quizSet.quizSetId);
+                closeModal();
+              }}
+              className={styles.quiz}
+            >
+              {quizSet.title}
+            </li>
+          ))}
+        </ul>
+      </div>
+    </div>
+  );
+}

frontend/src/components/QuizModal/QuizModal.module.css

@@ -0,0 +1,94 @@
+@keyframes show {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+@keyframes slideUp {
+  from {
+    transform: translateY(20px);
+  }
+  to {
+    transform: translateY(0);
+  }
+}
+
+.wrapper {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  padding: 100px;
+  background-color: rgba(0, 0, 0, 0.5);
+  backdrop-filter: blur(12px);
+  z-index: 1000;
+  animation: show 0.25s;
+}
+
+.modal {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  width: 100%;
+  max-width: 320px;
+  padding: 16px;
+  color: var(--background-secondary);
+  background-color: #111;
+  border-radius: 12px;
+  box-shadow: var(--shadow);
+  animation: slideUp 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
+}
+
+.title {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  font-size: 24px;
+  line-height: 1.2;
+  font-weight: 700;
+  margin: 0;
+  stroke: var(--background);
+
+  & > button {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    background-color: transparent;
+    border: none;
+    cursor: pointer;
+    padding: 0;
+    width: 32px;
+    height: 32px;
+  }
+}
+
+.list {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  margin: 0;
+  padding: 0;
+  list-style: none;
+}
+
+.quiz {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  padding: 16px;
+  border-radius: 8px;
+  border: none;
+  background-color: var(--text-color);
+  color: var(--on-primary);
+  font-size: 16px;
+  font-weight: 500;
+  cursor: pointer;
+  transition: background-color 0.25s;
+}

frontend/src/components/QuizModal/index.js

@@ -0,0 +1 @@
+export { default as QuizModal } from './QuizModal';

frontend/src/components/QuizSet/QuizSet.jsx

@@ -0,0 +1,91 @@
+import styles from './QuizSet.module.css';
+import { useCallback, useEffect, useRef, useState } from 'react';
+import { useQuizsetDetail } from '../../hooks/api/useQuizsetDetail';
+import Quiz from '../Quiz/Quiz';
+import { useParams } from 'react-router-dom';
+import LoadingIndicator from '../LoadingIndicator.jsx/LoadingIndicator';
+import instance from '../../utils/axios/instance';
+import { API_URL } from '../../constants';
+
+export default function QuizSet({ quizSetId, finish }) {
+  const { roomId } = useParams();
+  const [step, setStep] = useState(null);
+  const { data } = useQuizsetDetail(quizSetId);
+  const quizSetData = data?.data;
+  const quizList = quizSetData.quizzes;
+  const answers = useRef(Array(quizList.length).fill(null));
+  const interval = useRef(null);
+  const submit = useCallback(
+    (data) => {
+      instance.post(`${API_URL}/report/submit/${roomId}/quizset/${quizSetId}`, data).catch(() => {});
+    },
+    [quizSetId, roomId]
+  );
+  const QuizComponents = [
+    ...quizList.map((quiz, index) => (
+      <Quiz
+        key={index}
+        step={index}
+        answers={answers.current}
+        setAnswers={(value) => {
+          answers.current = answers.current.map((v, i) => (i === index ? value : v));
+        }}
+        {...quiz}
+      />
+    )),
+    <div
+      key={Infinity}
+      className={styles.message}
+    >
+      퀴즈 종료
+    </div>,
+  ];
+
+  useEffect(() => {
+    if (!quizList) {
+      return;
+    }
+
+    interval.current = setInterval(() => {
+      setStep((prev) => {
+        if (prev === null) {
+          return 0;
+        }
+
+        if (prev + 1 === quizList.length) {
+          submit(answers.current);
+          return Infinity;
+        }
+
+        return prev + 1;
+      });
+    }, 5000);
+
+    return () => {
+      clearInterval(interval.current);
+      interval.current = null;
+    };
+  }, [quizList, submit]);
+
+  useEffect(() => {
+    if (step === Infinity) {
+      finish();
+    }
+  }, [finish, step]);
+
+  return (
+    <>
+      {step === null ? (
+        <div className={styles.message}>
+          <span>퀴즈를 시작합니다</span>
+          <LoadingIndicator />
+        </div>
+      ) : (
+        <>
+          {QuizComponents[step]}
+          <div className={styles.progressBar} />
+        </>
+      )}
+    </>
+  );
+}

frontend/src/components/QuizSet/QuizSet.module.css

@@ -0,0 +1,44 @@
+@keyframes show {
+  from {
+    opacity: 0;
+    transform: translateY(20px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.message {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+  gap: 32px;
+  width: 100%;
+  height: 100%;
+  font-size: 24px;
+  font-style: normal;
+  font-weight: 700;
+  line-height: 1.2;
+  animation: show 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
+}
+
+@keyframes progress {
+  from {
+    transform: scaleX(0);
+  }
+  to {
+    transform: scaleX(1);
+  }
+}
+
+.progressBar {
+  width: 100%;
+  height: 8px;
+  background-color: var(--primary-color);
+  overflow: hidden;
+  margin-top: 16px;
+  transform-origin: left center;
+  animation: progress 5s linear infinite;
+}

frontend/src/components/QuizSet/index.js

@@ -0,0 +1 @@
+export { default as QuizSet } from './QuizSet';

frontend/src/components/QuizsetDetail/QuizsetDetail.jsx

@@ -1,6 +1,7 @@
 import BackIcon from '/src/assets/icons/back.svg?react';
 import { Link } from 'react-router-dom';
 import styles from './QuizsetDetail.module.css';
+import { STATIC_URL } from '../../constants';
 
 export default function QuizsetDetail({ topic, title, quizzes = [], onDelete, onEdit }) {
   return (
@@ -23,7 +24,7 @@ export default function QuizsetDetail({ topic, title, quizzes = [], onDelete, on
             <div>질문 : {quiz.question}</div>
             {quiz.image && (
               <img
-                src={`${import.meta.env.VITE_STATIC_URL}${quiz.image}`}
+                src={`${STATIC_URL}${quiz.image}`}
                 alt="강의 이미지"
                 className={styles.image}
               />

frontend/src/constants.js

@@ -1,3 +1,4 @@
 export const API_URL = import.meta.env.VITE_API_URL;
 export const ROOM_URL = import.meta.env.VITE_ROOM_URL;
 export const CHAT_URL = import.meta.env.VITE_CHAT_URL;
+export const STATIC_URL = import.meta.env.VITE_STATIC_URL;

frontend/src/hooks/api/useQuizsets.js

@@ -1,9 +1,9 @@
-import { useQuery } from '@tanstack/react-query';
+import { useSuspenseQuery } from '@tanstack/react-query';
 import instance from '../../utils/axios/instance';
 import { API_URL } from '../../constants';
 
 export function useQuizsets() {
-  return useQuery({
+  return useSuspenseQuery({
     queryKey: ['quizsetList'],
     queryFn: () => instance.get(`${API_URL}/quiz`),
   });

frontend/src/hooks/chat/useChatRoom.js

@@ -1,6 +1,7 @@
 import { useEffect, useRef, useState } from 'react';
 import { chatClient } from '../../utils/chat/chatClient';
 import useBoundStore from '../../store';
+import { useQuizsets } from '../api/useQuizsets';
 
 const USER_ID = crypto.getRandomValues(new Uint32Array(1))[0];
 
@@ -10,6 +11,19 @@ export default function useChatRoom(roomId) {
   const userName = useBoundStore((state) => state.userName) ?? '익명';
   const inputRef = useRef(null);
   const chatListRef = useRef(null);
+  const { data: quizSetData } = useQuizsets();
+  const quizSets = quizSetData?.data ?? [];
+  const [quizSetId, setQuizSetId] = useState(null);
+
+  const startQuiz = (quizSetId) => {
+    chatClient.publish({
+      destination: `/pub/chat.quiz.${roomId}`,
+      body: JSON.stringify({
+        userId: USER_ID,
+        quizSetId,
+      }),
+    });
+  };
 
   const handleSubmit = (e) => {
     e.preventDefault();
@@ -34,8 +48,12 @@ export default function useChatRoom(roomId) {
     client.onConnect = () => {
       client.subscribe(`/exchange/chat.exchange/*.room.${roomId}`, (response) => {
         const data = JSON.parse(response.body);
-        const { content: message, name } = data;
+        const { content: message, name, quizSetId } = data;
 
+        if (quizSetId !== undefined) {
+          setQuizSetId(quizSetId);
+          return;
+        }
         setMessages((prev) => [...prev, { id: prev.length, text: message, isMine: USER_ID === data.userId, name }]);
       });
     };
@@ -47,7 +65,9 @@ export default function useChatRoom(roomId) {
   }, [client, roomId]);
 
   useEffect(() => {
-    chatListRef.current.scrollTop = chatListRef.current.scrollHeight;
+    if (chatListRef.current) {
+      chatListRef.current.scrollTop = chatListRef.current.scrollHeight;
+    }
   }, [messages]);
 
   return {
@@ -55,5 +75,9 @@ export default function useChatRoom(roomId) {
     inputRef,
     handleSubmit,
     chatListRef,
+    startQuiz,
+    quizSets,
+    quizSetId,
+    setQuizSetId,
   };
 }

frontend/src/pages/LivePage/LivePage.jsx

@@ -33,8 +33,14 @@ export default function LivePage() {
       connect={true}
       data-lk-theme="default"
       onDisconnected={() => {
-        instance.post(`${API_URL}/video/deleteroom/${roomId}`).catch(() => {});
-        window.close();
+        setTimeout(() => {
+          instance
+            .post(`${API_URL}/video/deleteroom/${roomId}`)
+            .catch(() => {})
+            .finally(() => {
+              window.close();
+            });
+        }, 500);
       }}
     >
       <LiveRoom />