import { Signal } from "@segment/analytics-signals-runtime";
import { UserInfo } from "../../../types";
import { SignalsMiddleware, SignalsMiddlewareContext } from "../../emitter";

export class UserInfoMiddleware implements SignalsMiddleware {
  user!: UserInfo;

  load(ctx: SignalsMiddlewareContext) {
    this.user = ctx.analyticsInstance.user();
  }

  process(signal: Signal): Signal {
    // anonymousId should always exist here unless the user is explicitly setting it to null
    signal.anonymousId = this.user.anonymousId();
    return signal;
  }
}