text: // @flow
  
  import { maybeRedirectToWelcomePage } from '../app/actions';
  import {
      CONFERENCE_FAILED,
      CONFERENCE_JOINED,
      CONFERENCE_LEFT
  } from '../base/conference';
  import { CONNECTION_ESTABLISHED } from '../base/connection';
  import { hideDialog, isDialogOpen } from '../base/dialog';
  import {
      JitsiConferenceErrors
  } from '../base/lib-jitsi-meet';
  import { MiddlewareRegistry } from '../base/redux';
  
  import {
      CANCEL_LOGIN,
      STOP_WAIT_FOR_OWNER,
      WAIT_FOR_OWNER
  } from './actionTypes';
  import {
      hideLoginDialog,
      openWaitForOwnerDialog,
      stopWaitForOwner,
      waitForOwner
  } from './actions.web';
  import { LoginDialog, WaitForOwnerDialog } from './components';
  
  /**
   * Middleware that captures connection or conference failed errors and controls
   * {@link WaitForOwnerDialog} and {@link LoginDialog}.
   *
   * FIXME Some of the complexity was introduced by the lack of dialog stacking.
   *
   * @param {Store} store - Redux store.
   * @returns {Function}
   */
  MiddlewareRegistry.register(store => next => action => {
      switch (action.type) {
  
      case CANCEL_LOGIN: {
          if (!isDialogOpen(store, WaitForOwnerDialog)) {
              if (_isWaitingForOwner(store)) {
                  store.dispatch(openWaitForOwnerDialog());
  
                  return next(action);
              }
  
              store.dispatch(hideLoginDialog());
  
              store.dispatch(maybeRedirectToWelcomePage());
          }
          break;
      }
  
      case CONFERENCE_FAILED: {
          const { error } = action;
          let recoverable;
  
          if (error.name === JitsiConferenceErrors.AUTHENTICATION_REQUIRED) {
              if (typeof error.recoverable === 'undefined') {
                  error.recoverable = true;
              }
              recoverable = error.recoverable;
          }
          if (recoverable) {
              store.dispatch(waitForOwner());
          } else {
              store.dispatch(stopWaitForOwner());
          }
          break;
      }
  
      case CONFERENCE_JOINED:
          if (_isWaitingForOwner(store)) {
              store.dispatch(stopWaitForOwner());
          }
          store.dispatch(hideLoginDialog());
          break;
  
      case CONFERENCE_LEFT:
          store.dispatch(stopWaitForOwner());
          break;
  
      case CONNECTION_ESTABLISHED:
          store.dispatch(hideLoginDialog());
          break;
  
      case STOP_WAIT_FOR_OWNER:
          _clearExistingWaitForOwnerTimeout(store);
          store.dispatch(hideDialog(WaitForOwnerDialog));
          break;
  
      case WAIT_FOR_OWNER: {
          _clearExistingWaitForOwnerTimeout(store);
  
          const { handler, timeoutMs } = action;
  
          action.waitForOwnerTimeoutID = setTimeout(handler, timeoutMs);
  
          isDialogOpen(store, LoginDialog)
              || store.dispatch(openWaitForOwnerDialog());
          break;
      }
      }
  
      return next(action);
  });
  
  /**
   * Will clear the wait for conference owner timeout handler if any is currently
   * set.
   *
   * @param {Object} store - The redux store.
   * @returns {void}
   */
  function _clearExistingWaitForOwnerTimeout(
          { getState }: { getState: Function }) {
      const { waitForOwnerTimeoutID } = getState()['features/authentication'];
  
      waitForOwnerTimeoutID && clearTimeout(waitForOwnerTimeoutID);
  }
  
  /**
   * Checks if the cyclic "wait for conference owner" task is currently scheduled.
   *
   * @param {Object} store - The redux store.
   * @returns {void}
   */
  function _isWaitingForOwner({ getState }: { getState: Function }) {
      return getState()['features/authentication'].waitForOwnerTimeoutID;
  }
  