feat: 프로젝트 서비스에 멤버추가 메서드 구현

- addMember 메서드는 프로젝트 링크를 받아 프로젝트에 회원을 추가한다.
- isProjectMember는 회원이 프로젝트의 회원인지 확인한다.
- getProjectByLinkId는 프로젝트 링크로 프로젝트를 찾는다.

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

Author: choyoungwoo9

backend/src/project/service/project.service.spec.ts

@@ -3,6 +3,7 @@ import { ProjectService } from './project.service';
 import { ProjectRepository } from '../project.repository';
 import { Member } from 'src/member/entity/member.entity';
 import { Project } from '../entity/project.entity';
+import { ProjectToMember } from '../entity/project-member.entity';
 
 describe('ProjectService', () => {
   let projectService: ProjectService;
@@ -19,6 +20,8 @@ describe('ProjectService', () => {
             addProjectMember: jest.fn(),
             getProjectList: jest.fn(),
             getProject: jest.fn(),
+            getProjectByLinkId: jest.fn(),
+            getProjectToMember: jest.fn(),
           },
         },
       ],
@@ -81,4 +84,50 @@ describe('ProjectService', () => {
       expect(result).toEqual(project);
     });
   });
+
+  describe('Add Member', () => {
+    const projectLinkId = 'inviteUuid';
+    const project = Project.of('title', 'subject');
+    it('should return void when given member, title, subject', async () => {
+      jest
+        .spyOn(projectRepository, 'getProjectByLinkId')
+        .mockResolvedValue(project);
+      jest
+        .spyOn(projectRepository, 'getProjectToMember')
+        .mockResolvedValue(null);
+
+      await projectService.addMember(projectLinkId, member);
+
+      expect(projectRepository.getProjectByLinkId).toHaveBeenCalledWith(
+        projectLinkId,
+      );
+      expect(projectRepository.addProjectMember).toHaveBeenCalledWith(
+        project,
+        member,
+      );
+    });
+
+    it('should throw when already joined member', async () => {
+      jest
+        .spyOn(projectRepository, 'getProjectByLinkId')
+        .mockResolvedValue(project);
+      jest
+        .spyOn(projectRepository, 'getProjectToMember')
+        .mockResolvedValue(ProjectToMember.of(project, member));
+
+      await expect(
+        async () => await projectService.addMember(projectLinkId, member),
+      ).rejects.toThrow('already joined member');
+    });
+
+    it('should throw when invalid project link id', async () => {
+      jest
+        .spyOn(projectRepository, 'getProjectByLinkId')
+        .mockResolvedValue(null);
+
+      await expect(
+        async () => await projectService.addMember(projectLinkId, member),
+      ).rejects.toThrow('project link id not found');
+    });
+  });
 });

backend/src/project/service/project.service.ts

@@ -2,6 +2,7 @@ import { Injectable } from '@nestjs/common';
 import { ProjectRepository } from '../project.repository';
 import { Member } from 'src/member/entity/member.entity';
 import { Project } from '../entity/project.entity';
+import { ProjectToMember } from '../entity/project-member.entity';
 
 @Injectable()
 export class ProjectService {
@@ -21,4 +22,29 @@ export class ProjectService {
   async getProject(projectId: number): Promise<Project> {
     return await this.projectRepository.getProject(projectId);
   }
+
+  async addMember(projectLinkId: string, member: Member): Promise<void> {
+    const project =
+      await this.projectRepository.getProjectByLinkId(projectLinkId);
+    if (!project) throw new Error('project link id not found');
+
+    const isProjectMember = await this.isProjectMember(project, member);
+    if (isProjectMember) throw new Error('already joined member');
+
+    await this.projectRepository.addProjectMember(project, member);
+  }
+
+  async isProjectMember(
+    project: Project,
+    member: Member,
+  ): Promise<boolean> {
+    const projectToMember: ProjectToMember | null =
+      await this.projectRepository.getProjectToMember(project, member);
+    if (!projectToMember) return false;
+    return true;
+  }
+
+  getProjectByLinkId(projectLinkId: string): Promise<Project | null> {
+    return this.projectRepository.getProjectByLinkId(projectLinkId);
+  }
 }