feat: Qna와 Answer 수정 삭제 생성 기능 추가

frontend/src/Router.jsx

@@ -25,6 +25,7 @@ const MyInfoChangePage = lazy(async () => await import('./pages/MyInfoChangePage
 const PasswordChangePage = lazy(async () => await import('./pages/PasswordChangePage'));
 const LearningLecturesPage = lazy(async () => await import('./pages/LearningLecturesPage'));
 const LectureCreatePage = lazy(async () => await import('./pages/LectureCreatePage'));
+const EditQuestionPage = lazy(async () => await import('./pages/EditQuestionPage'));
 
 const router = createBrowserRouter([
   {
@@ -97,8 +98,21 @@ const router = createBrowserRouter([
               },
               {
                 path: ':questionId',
+                children: [
+                  {
+                    index: true,
                     element: <QuestionDetailPage />,
                   },
+                  {
+                    path: 'edit',
+                    element: <EditQuestionPage />,
+                  },
+                ],
+              },
+              {
+                path: ':questionId/edit',
+                element: <EditQuestionPage />,
+              },
               {
                 path: 'write',
                 element: <CreateQuestionPage />,

frontend/src/components/Article/ArticleDetail/ArticleDetail.jsx

@@ -2,13 +2,36 @@ import BackIcon from '/src/assets/icons/back.svg?react';
 import { Link } from 'react-router-dom';
 import styles from './ArticleDetail.module.css';
 import ArticleDetailAnswer from './ArticleDetailAnswer/ArticleDetailAnswer';
+import ArticleDetailAnswerInput from './ArticleDetailAnswer/ArticleDetailAnswerInput';
+import EditIcon from '/src/assets/icons/edit.svg?react';
+import { useState, useEffect } from 'react';
 
-export default function ArticleDetail({ topic, title, author = null, content, answer = null }) {
+export default function ArticleDetail({ topic, title, author = null, content, answer = null, onDelete }) {
-  // TODO: 답변 작성 기능 추가
+  const [submittedAnswer, setSubmittedAnswer] = useState(answer);
+  const [isEditing, setIsEditing] = useState(false);
+
+  useEffect(() => {
+    setSubmittedAnswer(answer);
+  }, [answer]);
+
+  const handleAnswerSubmit = (newAnswer) => {
+    setSubmittedAnswer(newAnswer);
+    setIsEditing(false);
+  };
+
+  const handleEditClick = () => {
+    setIsEditing(true);
+  };
+
+  const handleDeleteSubmit = () => {
+    setSubmittedAnswer(null);
+    setIsEditing(false);
+  };
 
   return (
     <div className={styles.articleDetail}>
       <header className={styles.header}>
+        <div className={styles.headerInside}>
           <Link
             to={'..'}
             className={styles.goBack}
@@ -20,11 +43,40 @@ export default function ArticleDetail({ topic, title, author = null, content, an
             <h1 className={styles.title}>{title}</h1>
             {author && <span className={styles.author}>{author}</span>}
           </div>
+        </div>
+        <Link
+          type="button"
+          className={styles.editButton}
+          to={'edit'}
+          state={{ title: title, content: content, answer: answer }}
+        >
+          <EditIcon className={styles.icon} />
+          <span>수정하기</span>
+        </Link>
+        <button
+          type="button"
+          className={styles.deleteButton}
+          onClick={onDelete}
+        >
+          삭제하기
+        </button>
       </header>
       <div>
         <p className={styles.content}>{content}</p>
       </div>
-      {answer && <ArticleDetailAnswer answer={answer} />}
+      {/* TODO: 이 부분에서 answer 만든다음 뒤로가기로 나갔다가 돌아오면 0.1초 정도 input 칸이 보였다가 answer 로 바뀜. 수정필요 */}
+      {submittedAnswer && !isEditing ? (
+        <ArticleDetailAnswer
+          answer={submittedAnswer}
+          onEditClick={handleEditClick}
+          onDeleteSubmit={handleDeleteSubmit}
+        />
+      ) : (
+        <ArticleDetailAnswerInput
+          onSubmit={handleAnswerSubmit}
+          initialAnswer={submittedAnswer}
+        />
+      )}
     </div>
   );
 }

frontend/src/components/Article/ArticleDetail/ArticleDetail.module.css

@@ -11,6 +11,12 @@
 }
 
 .header {
+  display: flex;
+  justify-content: space-between;
+  align-items: start;
+}
+
+.headerInside {
   display: flex;
   flex-direction: column;
   align-items: start;
@@ -49,3 +55,39 @@
   margin: 0;
   white-space: pre-line;
 }
+
+.icon {
+  stroke: var(--text-color);
+}
+
+.editButton {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 12px;
+  background: var(--background);
+  border: 1px solid var(--border-color);
+  border-radius: 8px;
+  font-size: 14px;
+  line-height: 1.4;
+  font-weight: 700;
+  color: var(--text-color);
+  cursor: pointer;
+}
+
+.deleteButton {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 12px 16px;
+  border: 1px solid var(--error-color);
+  background-color: var(--error-color);
+  color: var(--on-primary);
+  stroke: var(--error-color);
+  font-size: 16px;
+  line-height: 1.4;
+  font-weight: 700;
+  align-self: end;
+  border-radius: 8px;
+  cursor: pointer;
+}

frontend/src/components/Article/ArticleDetail/ArticleDetailAnswer/ArticleDetailAnswer.jsx

@@ -1,14 +1,42 @@
 import styles from './ArticleDetailAnswer.module.css';
 import ReplyIcon from '/src/assets/icons/reply.svg?react';
+import { useParams } from 'react-router-dom';
+import { useAnswerDelete } from '../../../../hooks/api/useAnswerDelete';
+
+export default function ArticleDetailAnswer({ answer, onEditClick, onDeleteSubmit }) {
+  const { questionId } = useParams();
+  const { answerDelete } = useAnswerDelete();
+
+  const handleDeleteSubmit = async (e) => {
+    e.preventDefault();
+
+    await answerDelete(questionId);
+    onDeleteSubmit();
+  };
 
-export default function ArticleDetailAnswer({ answer }) {
   return (
+    <>
       <section className={styles.answer}>
         <div className={styles.answerHeader}>
           <ReplyIcon />
           <div className={styles.author}>선생님의 답변</div>
         </div>
         <p className={styles.content}>{answer}</p>
+        <button
+          type="button"
+          className={styles.deleteButton}
+          onClick={handleDeleteSubmit}
+        >
+          <div>삭제</div>
+        </button>
+        <button
+          type="button"
+          className={styles.editButton}
+          onClick={onEditClick}
+        >
+          수정
+        </button>
       </section>
+    </>
   );
 }

frontend/src/components/Article/ArticleDetail/ArticleDetailAnswer/ArticleDetailAnswer.module.css

@@ -29,3 +29,37 @@
   margin: 0;
   color: var(--text-color);
 }
+
+.editButton {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 12px 16px;
+  border: 1px solid var(--primary-color);
+  background-color: var(--primary-color);
+  color: var(--on-primary);
+  stroke: var(--on-primary);
+  font-size: 16px;
+  line-height: 1.4;
+  font-weight: 700;
+  align-self: end;
+  border-radius: 8px;
+  cursor: pointer;
+}
+
+.deleteButton {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 12px 16px;
+  border: 1px solid var(--error-color);
+  background-color: var(--error-color);
+  color: var(--on-primary);
+  stroke: var(--on-primary);
+  font-size: 16px;
+  line-height: 1.4;
+  font-weight: 700;
+  align-self: end;
+  border-radius: 8px;
+  cursor: pointer;
+}

frontend/src/components/Article/ArticleDetail/ArticleDetailAnswer/ArticleDetailAnswerInput.jsx

@@ -0,0 +1,38 @@
+import styles from './ArticleDetailAnswerInput.module.css';
+import { useAnswerWrite } from '../../../../hooks/api/useAnswerWrite';
+import { useParams } from 'react-router-dom';
+import { useState } from 'react';
+
+export default function ArticleDetailAnswerInput({ onSubmit, initialAnswer }) {
+  const { answerWrite } = useAnswerWrite();
+  const { questionId } = useParams();
+  const [newAnswer, setNewAnswer] = useState(initialAnswer);
+
+  const handleSubmit = async (e) => {
+    e.preventDefault();
+    await answerWrite(questionId, newAnswer);
+    onSubmit(newAnswer);
+  };
+
+  return (
+    <form
+      onSubmit={handleSubmit}
+      className={styles.answer}
+    >
+      {/* TODO: 여기 css 부분은 내가 임의로 넣었음 */}
+      <input
+        type="text"
+        value={newAnswer}
+        onChange={(e) => setNewAnswer(e.target.value)}
+        placeholder="답변 작성"
+        className={styles.input}
+      />
+      <button
+        type="submit"
+        className={styles.button}
+      >
+        작성
+      </button>
+    </form>
+  );
+}

frontend/src/components/Article/ArticleDetail/ArticleDetailAnswer/ArticleDetailAnswerInput.module.css

@@ -0,0 +1,30 @@
+.answer {
+  border: 1px solid #ccc;
+  padding: 16px;
+  border-radius: 8px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.input {
+  flex: 1;
+  border: none;
+  padding: 8px;
+  font-size: 16px;
+  border-radius: 4px;
+  outline: none;
+}
+
+.button {
+  padding: 8px 16px;
+  font-size: 16px;
+  line-height: 1.4;
+  font-weight: 700;
+  background-color: var(--primary-color);
+  color: var(--on-primary);
+  stroke: var(--on-primary);
+  border: 1px solid var(--primary-color);
+  border-radius: 8px;
+  cursor: pointer;
+}

frontend/src/components/Article/EditQna/EditQna.jsx

@@ -0,0 +1,64 @@
+import { useState } from 'react';
+import { Link } from 'react-router-dom';
+import styles from './EditQna.module.css';
+import EditIcon from '/src/assets/icons/edit.svg?react';
+import BackIcon from '/src/assets/icons/back.svg?react';
+
+export default function EditQna({ topic, title, prevContent, prevTitle, onSubmit }) {
+  const [articleTitle, setArticleTitle] = useState(prevTitle);
+  const [articleContent, setArticleContent] = useState(prevContent);
+
+  const handleInput = (e) => {
+    setArticleContent(e.target.value);
+    e.target.style.height = 'auto';
+    e.target.style.height = e.target.scrollHeight + 'px';
+  };
+
+  return (
+    <div className={styles.createArticle}>
+      <header className={styles.header}>
+        <Link
+          to={'..'}
+          className={styles.goBack}
+        >
+          <BackIcon />
+          <span>{title}</span>
+        </Link>
+        <div className={styles.title}>{topic}</div>
+      </header>
+      <form
+        className={styles.formWrapper}
+        onSubmit={(e) => onSubmit(e, articleTitle, articleContent)}
+      >
+        <div className={styles.fieldWrapper}>
+          <label className={styles.label}>제목</label>
+          <input
+            type="text"
+            className={styles.titleInput}
+            placeholder={'제목을 입력하세요'}
+            value={articleTitle}
+            onChange={(e) => setArticleTitle(e.target.value)}
+          />
+        </div>
+        <div className={styles.fieldWrapper}>
+          <label className={styles.label}>내용</label>
+          <textarea
+            className={styles.contentInput}
+            placeholder="내용을 입력하세요"
+            value={articleContent}
+            onChange={handleInput}
+          ></textarea>
+        </div>
+        <button
+          type="button"
+          className={styles.button}
+          onClick={(e) => onSubmit(e, articleTitle, articleContent)}
+          disabled={!articleTitle || !articleContent}
+        >
+          <EditIcon />
+          <div>글 수정하기</div>
+        </button>
+      </form>
+    </div>
+  );
+}

frontend/src/components/Article/EditQna/EditQna.module.css

@@ -0,0 +1,110 @@
+.createArticle {
+  width: 100%;
+}
+
+.header {
+  display: flex;
+  flex-direction: column;
+  align-items: start;
+  gap: 8px;
+}
+
+.goBack {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  font-size: 20px;
+  line-height: 1.2;
+  font-weight: 400;
+  color: var(--text-color-secondary);
+  stroke: var(--text-color-secondary);
+}
+
+.title {
+  font-size: 32px;
+  line-height: 1.2;
+  font-weight: 800;
+}
+
+.formWrapper {
+  display: flex;
+  flex-direction: column;
+  margin-top: 20px;
+}
+
+.fieldWrapper {
+  display: flex;
+  flex-direction: column;
+  flex-wrap: nowrap;
+  margin-bottom: 20px;
+}
+
+.label {
+  color: var(--text-color);
+  font-size: 16px;
+  line-height: 1.4;
+  font-weight: 400;
+  margin-bottom: 8px;
+}
+
+.titleInput {
+  padding: 20px;
+  background: var(--background);
+  border: 1px solid var(--border-color);
+  border-radius: 8px;
+  font-size: 20px;
+  line-height: 1.2;
+  font-weight: 500;
+}
+
+.titleInput::placeholder {
+  color: var(--text-color-tertiary);
+}
+
+.contentInput {
+  padding: 20px;
+  height: 80px;
+  box-sizing: border-box;
+  overflow: hidden;
+  background: var(--background-color);
+  border: 1px solid var(--border-color);
+  border-radius: 8px;
+  font-size: 16px;
+  line-height: 1.4;
+  font-weight: 400;
+}
+
+.contentInput::placeholder {
+  color: var(--text-color-tertiary);
+}
+
+.button {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 12px 16px;
+  border: 1px solid var(--primary-color);
+  background-color: var(--primary-color);
+  color: var(--on-primary);
+  stroke: var(--on-primary);
+  font-size: 16px;
+  line-height: 1.4;
+  font-weight: 700;
+  align-self: end;
+  border-radius: 8px;
+  cursor: pointer;
+  transition:
+    background-color 0.25s,
+    border-color 0.25s,
+    stroke 0.25s,
+    color 0.25s;
+}
+
+.button:disabled,
+.button[disabled] {
+  border-color: var(--border-color);
+  background-color: var(--background-tertiary);
+  color: var(--text-color-tertiary);
+  cursor: not-allowed;
+  stroke: var(--text-color-tertiary);
+}

frontend/src/components/Article/index.js

@@ -3,3 +3,5 @@ export { default as ArticleDetailAnswer } from './ArticleDetail/ArticleDetailAns
 export { default as CreateArticle } from './CreateArticle/CreateArticle.jsx';
 export { default as ArticlePreview } from './ArticlePreview/ArticlePreview.jsx';
 export { default as EditArticle } from './EditArticle/EditArticle.jsx';
+export { default as EditQna } from './EditQna/EditQna.jsx';
+export { default as ArticleDetailAnswerInput } from './ArticleDetail/ArticleDetailAnswer/ArticleDetailAnswerInput.jsx';

frontend/src/hooks/api/useAnswerDelete.js

@@ -0,0 +1,13 @@
+import instance from '../../utils/axios/instance';
+import { API_URL } from '../../constants';
+
+export function useAnswerDelete() {
+  const answerDelete = (questionId) => {
+    const newAnswer = {
+      answer: null,
+    };
+    return instance.post(`${API_URL}/qna/answer/create/${questionId}`, newAnswer);
+  };
+
+  return { answerDelete };
+}

frontend/src/hooks/api/useAnswerEdit.js

@@ -0,0 +1,15 @@
+import instance from '../../utils/axios/instance';
+import { API_URL } from '../../constants';
+
+export function useAnswerEdit() {
+  const answerEdit = (questionId, title, content, answer) => {
+    const newAnswer = {
+      title,
+      content,
+      answer,
+    };
+    return instance.put(`${API_URL}/qna/answer/update/${questionId}`, newAnswer);
+  };
+
+  return { answerEdit };
+}

frontend/src/hooks/api/useAnswerWrite.js

@@ -0,0 +1,13 @@
+import instance from '../../utils/axios/instance';
+import { API_URL } from '../../constants';
+
+export function useAnswerWrite() {
+  const answerWrite = (questionId, answer) => {
+    const newAnswer = {
+      answer: answer,
+    };
+    return instance.post(`${API_URL}/qna/answer/create/${questionId}`, newAnswer);
+  };
+
+  return { answerWrite };
+}

frontend/src/hooks/api/useNoticeDelete.js

@@ -0,0 +1,10 @@
+import instance from '../../utils/axios/instance';
+import { API_URL } from '../../constants';
+
+export function useNoticeDelete() {
+  const noticeDelete = (boardId) => {
+    return instance.delete(`${API_URL}/board/${boardId}`);
+  };
+
+  return { noticeDelete };
+}

frontend/src/hooks/api/useQnaDelete.js

@@ -0,0 +1,10 @@
+import instance from '../../utils/axios/instance';
+import { API_URL } from '../../constants';
+
+export function useQnaDelete() {
+  const qnaDelete = (questionId) => {
+    return instance.delete(`${API_URL}/qna/${questionId}`);
+  };
+
+  return { qnaDelete };
+}

frontend/src/hooks/api/useQnaEdit.js

@@ -0,0 +1,15 @@
+import instance from '../../utils/axios/instance';
+import { API_URL } from '../../constants';
+
+export function useQnaEdit() {
+  const qnaEdit = (questionId, title, content, answer) => {
+    const newQna = {
+      title,
+      content,
+      answer,
+    };
+    return instance.put(`${API_URL}/qna/${questionId}`, newQna);
+  };
+
+  return { qnaEdit };
+}

frontend/src/pages/EditQuestionPage/EditQuestionPage.jsx

@@ -0,0 +1,27 @@
+import { useQnaEdit } from '../../hooks/api/useQnaEdit';
+import { useParams, useNavigate, useLocation } from 'react-router-dom';
+import { EditQna } from '../../components/Article';
+
+export default function EditQuestionPage() {
+  const navigate = useNavigate();
+  const { questionId } = useParams();
+  const { qnaEdit } = useQnaEdit();
+  const location = useLocation();
+
+  const handleSubmit = async (e, title, content, answer) => {
+    e.preventDefault();
+
+    await qnaEdit(questionId, title, content, answer);
+    navigate('..');
+  };
+  return (
+    <EditQna
+      topic="질문하기"
+      title="Q&A"
+      prevTitle={location.state.title}
+      prevContent={location.state.content}
+      prevAnswer={location.state.answer}
+      onSubmit={handleSubmit}
+    />
+  );
+}

frontend/src/pages/EditQuestionPage/index.js

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

frontend/src/pages/NoticeDetailPage/NoticeDetailPage.jsx

@@ -1,19 +1,28 @@
 import { ArticleDetail } from '../../components/Article';
-import { useParams } from 'react-router-dom';
+import { useParams, useNavigate } from 'react-router-dom';
 import { useNoticeDetail } from '../../hooks/api/useNoticeDetail';
+import { useNoticeDelete } from '../../hooks/api/useNoticeDelete';
 
 export default function NoticeDetailPage() {
   const params = useParams();
   const noticeId = params.noticeId;
   const { data } = useNoticeDetail(noticeId);
   const notice = data?.data;
+  const navigate = useNavigate();
+  const { noticeDelete } = useNoticeDelete();
   // TODO: 수정 버튼 추가(여기에 또는 ArticleDetail에)
 
+  const handleDelete = async () => {
+    await noticeDelete(noticeId);
+    navigate('..');
+  };
+
   return (
     <ArticleDetail
       topic="공지사항"
       title={notice.title}
       content={notice.content}
+      onDelete={handleDelete}
     />
   );
 }

frontend/src/pages/QuestionDetailPage/QuestionDetailPage.jsx

@@ -1,12 +1,20 @@
 import { ArticleDetail } from '../../components/Article';
-import { useParams } from 'react-router-dom';
+import { useParams, useNavigate } from 'react-router-dom';
 import { useQnaDetail } from '../../hooks/api/useQnaDetail';
+import { useQnaDelete } from '../../hooks/api/useQnaDelete';
 
 export default function QuestionDetailPage() {
   const params = useParams();
   const qnaId = params.questionId;
   const { data } = useQnaDetail(qnaId);
   const qna = data?.data;
+  const { qnaDelete } = useQnaDelete();
+  const navigate = useNavigate();
+
+  const handleDelete = async () => {
+    await qnaDelete(qnaId);
+    navigate('..');
+  };
 
   return (
     <ArticleDetail
@@ -15,6 +23,7 @@ export default function QuestionDetailPage() {
       author={qna.username}
       content={qna.content}
       answer={qna?.answer}
+      onDelete={handleDelete}
     />
   );
 }