NotifyTrigger (Search Engine)

import {NotifyTrigger as HeadlessNotifyTrigger} from '@coveo/headless';
import {useEffect, useState, FunctionComponent} from 'react';
 
interface HeadlessNotifyTriggerProps {
  controller: HeadlessNotifyTrigger;
}
 
export const NotifyTrigger: FunctionComponent<HeadlessNotifyTriggerProps> = (
  props
) => {
  const {controller} = props;
  const [state, setState] = useState(controller.state);
 
  useEffect(() => controller.subscribe(() => updateState()), []);
  useEffect(() => notify(), [state.notifications]);
 
  const updateState = () => {
    setState(props.controller.state);
  };
 
  const notify = () => {
    state.notifications.forEach((notification) => {
      alert('Notification: ' + notification);
    });
  };
 
  return null;
};
 
// usage
 
/**
 * ```tsx
 * const controller = buildNotifyTrigger(engine);
 *
 * <NotifyTriggerFn controller={controller} />;
 * ```
 */