server/auth.js

export class Auth {
  constructor({
    baseUrl,
    remoteBaseUrl,
    giteaAppBaseUrl,
    giteaClientId,
    giteaClientSecret
  }) {
    this.baseUrl = baseUrl
    this.remoteBaseUrl = remoteBaseUrl
    this.giteaAppBaseUrl = giteaAppBaseUrl
    this.giteaClientId = giteaClientId
    this.giteaClientSecret = giteaClientSecret
  }

  async redirect(event) {
    const url = new URL(
      this.remoteBaseUrl + '/'
    )
    event.respondWith(new Response(
      'extract query and redirect', {status: 200}
    ))
  }
}