add professor

src/professor/professor.controller.ts

@@ -0,0 +1,15 @@
+import { Controller, Get, Param, ParseIntPipe } from '@nestjs/common';
+import { ApiOperation, ApiTags } from '@nestjs/swagger';
+import { ProfessorService } from './professor.service';
+
+@ApiTags('professor')
+@Controller('professor')
+export class ProfessorController {
+  constructor(private readonly professorService: ProfessorService) {}
+
+  @ApiOperation({ summary: '교수별 개설 강좌 조회 API' })
+  @Get(':id')
+  async getProfessorInfo(@Param('id', new ParseIntPipe()) id: number) {
+    return this.professorService.getProfessorInfo(id);
+  }
+}

src/professor/professor.module.ts

@@ -0,0 +1,12 @@
+import { Module } from '@nestjs/common';
+import { ProfessorController } from './professor.controller';
+import { ProfessorService } from './professor.service';
+import { ProfessorRepository } from './professor.repository';
+import { PrismaModule } from 'src/prisma/prisma.module';
+
+@Module({
+  imports: [PrismaModule],
+  controllers: [ProfessorController],
+  providers: [ProfessorService, ProfessorRepository],
+})
+export class ProfessorModule {}

src/professor/professor.repository.ts

@@ -0,0 +1,27 @@
+import { Injectable, InternalServerErrorException } from '@nestjs/common';
+import { PrismaClientKnownRequestError } from '@prisma/client/runtime/library';
+import { PrismaService } from 'src/prisma/prisma.service';
+
+@Injectable()
+export class ProfessorRepository {
+  constructor(private readonly prismaService: PrismaService) {}
+
+  async findProfessorLecture(id: number) {
+    return this.prismaService.lecture
+      .findMany({
+        where: {
+          LectureProfessor: {
+            some: {
+              professorId: id,
+            },
+          },
+        },
+      })
+      .catch((error) => {
+        if (error instanceof PrismaClientKnownRequestError) {
+          throw new InternalServerErrorException(error.message);
+        }
+        throw new InternalServerErrorException('Unexpected error occurred');
+      });
+  }
+}

src/professor/professor.service.ts

@@ -0,0 +1,11 @@
+import { Injectable } from '@nestjs/common';
+import { ProfessorRepository } from './professor.repository';
+
+@Injectable()
+export class ProfessorService {
+  constructor(private readonly professorRepository: ProfessorRepository) {}
+
+  async getProfessorInfo(id: number) {
+    return this.professorRepository.findProfessorLecture(id);
+  }
+}