Merge pull request #75 from boostcampwm-2024/be-feat#71

[BE] 기수별 전체 프로젝트 갯수 응답 API 구현

backend/console-server/src/project/dto/count-project-by-generation-response.dto.ts

@@ -0,0 +1,18 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { Type } from 'class-transformer';
+
+export class CountProjectByGenerationResponseDto {
+    @ApiProperty({
+        example: '5',
+        description: '부스트캠프 기수',
+    })
+    @Type(() => Number)
+    generation: number;
+
+    @ApiProperty({
+        example: '42',
+        description: '해당 기수의 프로젝트 총 개수',
+    })
+    @Type(() => Number)
+    count: number;
+}

backend/console-server/src/project/dto/count-project-by-generation.dto.ts

@@ -0,0 +1,14 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsNotEmpty, IsNumber } from 'class-validator';
+import { Type } from 'class-transformer';
+
+export class CountProjectByGenerationDto {
+    @ApiProperty({
+        example: '5',
+        description: '부스트캠프 기수',
+    })
+    @IsNotEmpty()
+    @Type(() => Number)
+    @IsNumber()
+    generation: number;
+}

backend/console-server/src/project/project.controller.ts

@@ -4,8 +4,9 @@ import { Body } from '@nestjs/common';
 import { ProjectService } from './project.service';
 import { CreateProjectDto } from './dto/create-project.dto';
 import { FindByGenerationDto } from './dto/find-by-generation.dto';
-import { ApiOperation, ApiResponse, ApiTags } from '@nestjs/swagger';
+import { ApiOperation, ApiResponse } from '@nestjs/swagger';
 import { ProjectResponseDto } from './dto/create-project-response.dto';
+import { CountProjectByGenerationDto } from './dto/count-project-by-generation.dto';
 
 @Controller('project')
 export class ProjectController {
@@ -39,4 +40,21 @@ export class ProjectController {
     findByGeneration(@Query() findGenerationProjectDto: FindByGenerationDto) {
         return this.projectService.findByGeneration(findGenerationProjectDto);
     }
+
+    @Get('/count')
+    @HttpCode(HttpStatus.OK)
+    @ApiOperation({
+        summary: '기수 내 전체 프로젝트 개수',
+        description: '요청받은 기수의 전체 프로젝트 개수를 반환합니다.',
+    })
+    @ApiResponse({
+        status: 200,
+        description: '기수의 전체 프로젝트 개수가 정상적으로 반환됨',
+        type: ProjectResponseDto,
+    })
+    async countProjectByGeneration(
+        @Query() countProjectByGenerationDto: CountProjectByGenerationDto,
+    ) {
+        return await this.projectService.countProjectByGeneration(countProjectByGenerationDto);
+    }
 }

backend/console-server/src/project/project.service.ts

@@ -8,6 +8,8 @@ import { ProjectResponseDto } from './dto/create-project-response.dto';
 import { plainToInstance } from 'class-transformer';
 import { FindByGenerationDto } from './dto/find-by-generation.dto';
 import { FindByGenerationResponseDto } from './dto/find-by-generation-response.dto';
+import { CountProjectByGenerationDto } from './dto/count-project-by-generation.dto';
+import { CountProjectByGenerationResponseDto } from './dto/count-project-by-generation-response.dto';
 
 @Injectable()
 export class ProjectService {
@@ -49,6 +51,19 @@ export class ProjectService {
 
         return projects.map((p) => plainToInstance(FindByGenerationResponseDto, p.name));
     }
+
+    async countProjectByGeneration(countProjectByGenerationDto: CountProjectByGenerationDto) {
+        const generation = countProjectByGenerationDto.generation;
+
+        const count = await this.projectRepository.count({
+            where: { generation: generation },
+        });
+
+        return plainToInstance(CountProjectByGenerationResponseDto, {
+            generation: generation,
+            count: count,
+        });
+    }
 }
 
 function isUniqueConstraintViolation(error: Error): boolean {