ADD: leaderboard (#69)

backend/code/src/app.module.ts

@@ -12,6 +12,7 @@ import { MessagesModule } from './messages/messages.module';
 import { EventEmitterModule } from '@nestjs/event-emitter';
 import { Gateways } from './gateways/gateways.gateway';
 import { GameModule } from './game/game.module';
+import { LeaderBoardModule } from './leaderboard/leaderboard.module';
 
 @Module({
  imports: [
@@ -25,6 +26,7 @@ import { GameModule } from './game/game.module';
  MessagesModule,
  EventEmitterModule.forRoot(),
  GameModule,
+ LeaderBoardModule,
  ],
  controllers: [AppController],
  providers: [PrismaService, Gateways],

backend/code/src/leaderboard/dto/leaderboard.dto.ts

@@ -0,0 +1,8 @@
+import { ApiProperty } from '@nestjs/swagger';
+
+export class LeaderboardResponseDto {
+ @ApiProperty({ example: '60f1a7b0e1b3c2a4e8b4a1a0' })
+ userId: string;
+ @ApiProperty({ example: '3' })
+ wins: number;
+}

backend/code/src/leaderboard/leaderboard.controller.ts

@@ -0,0 +1,22 @@
+import { Controller, Get, Query, UseGuards, HttpStatus } from '@nestjs/common';
+import { AtGuard } from 'src/auth/guards/at.guard';
+import { LeaderBoardService } from './leaderboard.service';
+import { QueryOffsetDto } from 'src/friends/dto/query-ofsset-dto';
+import { ApiResponse, ApiTags } from '@nestjs/swagger';
+import { LeaderboardResponseDto } from './dto/leaderboard.dto';
+
+@ApiTags('leaderboard')
+@Controller('leaderboard')
+export class LeaderBoardController {
+ constructor(private readonly leaderBordService: LeaderBoardService) {}
+
+ @Get()
+ @ApiResponse({
+ type: LeaderboardResponseDto,
+ status: HttpStatus.OK,
+ })
+ @UseGuards(AtGuard)
+ async getLeaderBoard(@Query() { offset, limit }: QueryOffsetDto) {
+ return this.leaderBordService.getLeaderBoard(offset, limit);
+ }
+}

backend/code/src/leaderboard/leaderboard.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { LeaderBoardController } from './leaderboard.controller';
+import { LeaderBoardService } from './leaderboard.service';
+
+@Module({
+ controllers: [LeaderBoardController],
+ providers: [LeaderBoardService],
+})
+export class LeaderBoardModule {}

backend/code/src/leaderboard/leaderboard.service.ts

@@ -0,0 +1,24 @@
+import { Injectable } from '@nestjs/common';
+import { PrismaService } from 'src/prisma/prisma.service';
+
+@Injectable()
+export class LeaderBoardService {
+ constructor(private prisma: PrismaService) {}
+ async getLeaderBoard(offset: number, limit: number) {
+ const leaderboard = await this.prisma.match.groupBy({
+ skip: offset,
+ take: limit,
+ by: ['winner_id'],
+ _count: { id: true },
+ orderBy: {
+ _count: {
+ id: 'desc',
+ },
+ },
+ });
+ return leaderboard.map((user) => ({
+ userId: user.winner_id,
+ wins: user._count.id,
+ }));
+ }
+}