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backend/src/data/articleService.js

@@ -13,7 +13,71 @@ const articleService = {
 
   async findArticleById(articleId) {
     try {
+      const article = await Article
+      .findById(articleId)
+      .populate('author')
+      .populate('comments.author')
+      .populate('likes');
+      return article;
+    } catch (err) {
+      throw err;
+    }
+  },
 
+  async findArticlesByAuthor(authorId) {
+    try {
+      const articles = await Article
+      .find({ author: authorId })
+      .populate('author')
+      .populate('likes');
+      return articles;
+    } catch (err) {
+      throw err;
+    }
+  },
+
+  async deleteArticle(articleId) {
+    try {
+      const article = await Article.findByIdAndDelete(articleId);
+      return article;
+    } catch (err) {
+      throw err;
+    }
+  },
+
+  async createComment(articleId, commentData) {
+    try {
+      const article = await Article.findById(articleId);
+      article.comments.push(commentData);
+      await article.save();
+      return article;
+    } catch (err) {
+      throw err;
+    }
+  },
+
+  async deleteComment(articleId, commentId) {
+    try {
+      const article = await Article.findById(articleId);
+      article.comments.pull({ _id: commentId });
+      await article.save();
+      return article;
+    } catch (err) {
+      throw err;
+    }
+  },
+
+  async setLike(articleId, userId) {
+    try {
+      const article = await Article.findById(articleId);
+      if(article.likes.includes(userId)) {
+        article.likes.pull({ _id: userId });
+      }
+      else {
+        article.likes.push(userId);
+      }
+      await article.save();
+      return article;
     } catch (err) {
       throw err;
     }

backend/src/data/userService.js

@@ -11,6 +11,15 @@ const userService = {
     }
   },
 
+  async findUserById(userId) {
+    try {
+      const user = await User.findById(userId);
+      return user;
+    } catch (err) {
+      throw err;
+    }
+  },
+
   async findUserByEmail(email) {
     try {
       const user = await User.findOne({ email });
@@ -19,6 +28,15 @@ const userService = {
       throw err;
     }
   },
+
+  async existsByEmail(email) {
+    try {
+      const user = await User.exists({ email });
+      return user !== null;
+    } catch (err) {
+      throw err;
+    }
+  }
 };
 
 export default userService;
\ No newline at end of file

backend/src/index.js

@@ -53,7 +53,7 @@ app.post('/login', async (req, res) => {
 	const expires =  moment().add(sessionTime.toString(),'m').toDate();
 
 	// 정보가 없다면 회원 가입 (강제?)
-  const user = await userService.findUserByEmail(req.body.email);
+  const user = await userService.existsByEmail(req.body.email);
 	if (!user) { // 유저가 없다면 회원 가입 후 세션 생성
 		let userProfilePicture = req.body.picture || null;
     await userService.createUser({