import { Injectable, NestMiddleware } from '@nestjs/common';
import { Request, Response, NextFunction } from 'express';

@Injectable()
export class TenantMiddleware implements NestMiddleware {
  use(req: Request, res: Response, next: NextFunction) {
    const tenantId = req.headers['x-tenant-id'];
    if (!tenantId) {
      return res.status(400).send('Tenant ID is missing');
    }
    
    // Attach tenantId to the request object for later use
    req['tenantId'] = tenantId;
    next();
  }
}

import { Injectable, Scope, Inject } from '@nestjs/common';
import { REQUEST } from '@nestjs/core';
import { Request } from 'express';

@Injectable({ scope: Scope.REQUEST })
export class TenantService {
  private tenantId: string;

  constructor(@Inject(REQUEST) private request: Request) {
    this.tenantId = this.request['tenantId'];
  }

  getTenantId(): string {
    return this.tenantId;
  }
}