feat: add post comments

src/posts/dto/comment-post.dto.ts

@@ -0,0 +1,7 @@
+import { IsNotEmpty, IsString } from 'class-validator';
+
+export class CommentPostDto {
+  @IsString()
+  @IsNotEmpty()
+  text: string;
+}

src/posts/posts.controller.ts

@@ -1,6 +1,7 @@
 import {
   Body,
   Controller,
+  Delete,
   FileTypeValidator,
   Get,
   Param,
@@ -14,6 +15,7 @@ import { randomUUID } from 'crypto';
 import { diskStorage } from 'multer';
 import { extname } from 'path';
 import { User, UserPayload } from 'src/auth/decorators/user.decorator';
+import { CommentPostDto } from './dto/comment-post.dto';
 import { CreatePostDto } from './dto/create-post.dto';
 import { PostsService } from './posts.service';
 
@@ -52,13 +54,22 @@ export class PostsController {
     return this.postsService.findAll();
   }
 
-  @Post(':id/like')
+  @Post(':id/likes')
   like(@User() user: UserPayload, @Param('id') id: string) {
     return this.postsService.like(+id, user.sub);
   }
 
-  @Post(':id/unlike')
+  @Delete(':id/likes')
   unlike(@User() user: UserPayload, @Param('id') id: string) {
     return this.postsService.unlike(+id, user.sub);
   }
+
+  @Post(':id/comments')
+  comment(
+    @User() user: UserPayload,
+    @Param('id') id: string,
+    @Body() commentPostDto: CommentPostDto,
+  ) {
+    return this.postsService.comment(+id, user.sub, commentPostDto);
+  }
 }

src/posts/posts.module.ts

@@ -1,12 +1,13 @@
 import { MikroOrmModule } from '@mikro-orm/nestjs';
 import { Module } from '@nestjs/common';
 import { User } from 'src/users/entities/user.entity';
+import { PostComment } from './entities/post-comment.entity';
 import { Post } from './entities/post.entity';
 import { PostsController } from './posts.controller';
 import { PostsService } from './posts.service';
 
 @Module({
-  imports: [MikroOrmModule.forFeature([Post, User])],
+  imports: [MikroOrmModule.forFeature([Post, PostComment, User])],
   controllers: [PostsController],
   providers: [PostsService],
 })

src/posts/posts.service.ts

@@ -4,7 +4,9 @@ import { EntityManager } from '@mikro-orm/postgresql';
 import { Injectable } from '@nestjs/common';
 import { UserPayload } from 'src/auth/decorators/user.decorator';
 import { User } from 'src/users/entities/user.entity';
+import { CommentPostDto } from './dto/comment-post.dto';
 import { CreatePostDto } from './dto/create-post.dto';
+import { PostComment } from './entities/post-comment.entity';
 import { Post } from './entities/post.entity';
 
 @Injectable()
@@ -14,6 +16,8 @@ export class PostsService {
     private readonly postRepository: EntityRepository<Post>,
     @InjectRepository(User)
     private readonly userRepository: EntityRepository<User>,
+    @InjectRepository(PostComment)
+    private readonly postCommentRepository: EntityRepository<PostComment>,
     private readonly em: EntityManager,
   ) {}
 
@@ -33,14 +37,14 @@ export class PostsService {
 
   findAll() {
     return this.postRepository.findAll({
-      populate: ['author', 'likedBy', 'comments'],
+      populate: ['author', 'likedBy', 'comments', 'comments.author'],
     });
   }
 
   async like(id: number, userId: number) {
     const post = await this.postRepository.findOneOrFail(
       { id },
-      { populate: ['author', 'likedBy', 'comments'] },
+      { populate: ['author', 'likedBy', 'comments', 'comments.author'] },
     );
     const user = await this.userRepository.findOneOrFail({ id: userId });
 
@@ -53,7 +57,7 @@ export class PostsService {
   async unlike(id: number, userId: number) {
     const post = await this.postRepository.findOneOrFail(
       { id },
-      { populate: ['author', 'likedBy', 'comments'] },
+      { populate: ['author', 'likedBy', 'comments', 'comments.author'] },
     );
     const user = await this.userRepository.findOneOrFail({ id: userId });
 
@@ -62,4 +66,22 @@ export class PostsService {
     await this.em.flush();
     return post;
   }
+
+  async comment(id: number, userId: number, comment: CommentPostDto) {
+    const post = await this.postRepository.findOneOrFail(
+      { id },
+      { populate: ['author', 'likedBy', 'comments', 'comments.author'] },
+    );
+    const user = await this.userRepository.findOneOrFail({ id: userId });
+
+    const postComment = this.postCommentRepository.create({
+      ...comment,
+      post,
+      author: user,
+    });
+    post.comments.add(postComment);
+
+    await this.em.flush();
+    return post;
+  }
 }