@feathersjs/authentication/src/strategy.ts

import { AuthenticationStrategy, AuthenticationBase } from './core'
import { Application, Service } from '@feathersjs/feathers'

export class AuthenticationBaseStrategy implements AuthenticationStrategy {
  authentication?: AuthenticationBase
  app?: Application
  name?: string

  setAuthentication(auth: AuthenticationBase) {
    this.authentication = auth
  }

  setApplication(app: Application) {
    this.app = app
  }

  setName(name: string) {
    this.name = name
  }

  get configuration(): any {
    return this.authentication.configuration[this.name]
  }

  get entityService(): Service {
    const { service } = this.configuration

    if (!service) {
      return null
    }

    return this.app.service(service) || null
  }
}