matcher/src/modules/health/adapters/primaries/health-server.controller.ts

import { Controller } from '@nestjs/common';
import { GrpcMethod } from '@nestjs/microservices';
import { PrismaHealthIndicatorUseCase } from '../../domain/usecases/prisma.health-indicator.usecase';

enum ServingStatus {
  UNKNOWN = 0,
  SERVING = 1,
  NOT_SERVING = 2,
}

interface HealthCheckRequest {
  service: string;
}

interface HealthCheckResponse {
  status: ServingStatus;
}

@Controller()
export class HealthServerController {
  constructor(
    private readonly prismaHealthIndicatorUseCase: PrismaHealthIndicatorUseCase,
  ) {}

  @GrpcMethod('Health', 'Check')
  async check(
    // eslint-disable-next-line @typescript-eslint/no-unused-vars
    data: HealthCheckRequest,
    // eslint-disable-next-line @typescript-eslint/no-unused-vars
    metadata: any,
  ): Promise<HealthCheckResponse> {
    const healthCheck = await this.prismaHealthIndicatorUseCase.isHealthy(
      'prisma',
    );
    return {
      status:
        healthCheck['prisma'].status == 'up'
          ? ServingStatus.SERVING
          : ServingStatus.NOT_SERVING,
    };
  }
}