@absinthe/socket/src/unobserve.js

Absinthe Socket

// @flow

import notifierRefresh from "./notifier/refresh";
import notifierUnobserve from "./notifier/unobserve";
import updateNotifiers from "./updateNotifiers";

import type {AbsintheSocket} from "./types";
import type {Notifier, Observer} from "./notifier/types";

const ensureHasActiveObserver = (notifier, observer) => {
  if (notifier.activeObservers.includes(observer)) return notifier;

  throw new Error("Observer is not attached to notifier");
};

/**
 * Detaches observer from notifier
 *
 * @example
 * import * as withAbsintheSocket from "@absinthe/socket";
 *
 * withAbsintheSocket.unobserve(absintheSocket, notifier, observer);
 */
const unobserve = (
  absintheSocket: AbsintheSocket,
  notifier: Notifier<any, any>,
  observer: Observer<any, any>
): AbsintheSocket =>
  updateNotifiers(
    absintheSocket,
    notifierRefresh(
      notifierUnobserve(ensureHasActiveObserver(notifier, observer), observer)
    )
  );

export default unobserve;