feat: 프로젝트 컨트롤러에 프로젝트 참여 엔드포인트 구현

- joinProject로 회원이 프로젝트 링크로 프로젝트에 참여할 수 있도록 한다.
- JoinProjectRequestDto로 '/join' 엔드포인트의 요청형식을 검증한다.

Co-Authored-By: Suhjeong Kim <[email protected]>

Author: choyoungwoo9

backend/src/project/dto/JoinProjectRequest.dto.ts

@@ -0,0 +1,7 @@
+import { IsNotEmpty, IsUUID } from 'class-validator';
+
+export class JoinProjectRequestDto {
+  @IsNotEmpty()
+  @IsUUID(4, {message: "not uuid"})
+  inviteLinkId: string;
+}

backend/src/project/project.controller.ts

@@ -1,7 +1,18 @@
-import { Body, Controller, Get, Post, Req, UseGuards } from '@nestjs/common';
+import {
+  Body,
+  Controller,
+  Get,
+  NotFoundException,
+  Post,
+  Req,
+  Res,
+  UseGuards,
+} from '@nestjs/common';
 import { ProjectService } from './service/project.service';
 import { CreateProjectRequestDto } from './dto/CreateProjectRequest.dto';
 import { MemberRequest } from 'src/common/guard/authentication.guard';
+import { JoinProjectRequestDto } from './dto/JoinProjectRequest.dto';
+import { Response } from 'express';
 
 @Controller('project')
 export class ProjectController {
@@ -33,4 +44,26 @@ export class ProjectController {
     );
     return;
   }
+
+  @Post('/join')
+  async joinProject(
+    @Req() request: MemberRequest,
+    @Body() body: JoinProjectRequestDto,
+    @Res() response: Response,
+  ) {
+    const project = await this.projectService.getProjectByLinkId(
+      body.inviteLinkId,
+    );
+    if (!project) throw new NotFoundException();
+
+    const isProjectMember = await this.projectService.isProjectMember(
+      project,
+      request.member,
+    );
+    if (isProjectMember)
+      return response.status(200).send({ projectId: project.id });
+
+    await this.projectService.addMember(body.inviteLinkId, request.member);
+    return response.status(201).send();
+  }
 }