sergey-telpuk / nestjs-rbac

import { IFilterPermission } from '../../../src';

import { Injectable } from '@nestjs/common';

function getRawHeader(name: string, rawHeaders: string[]): string | boolean {

  const key = rawHeaders.indexOf(name);

  if (key < 0) {

    return false;

  }

  const value = key + 1;

  return rawHeaders[value];

}

@Injectable()

export class RequestAsyncFilter implements IFilterPermission {

  async canAsync(params?: any[]): Promise<boolean> {

    const name = 'test-header';

    // Fix: missing `headers`, using `rawHeaders` for fixing tests on Node.js 15

    const header = params[0]?.headers?.[name] ?? getRawHeader(name, params[0].rawHeaders);

    return Promise.resolve(header === 'test');

  }

}