Prevent window from closing when last tab is closed (works great with autohide and visor)

hyper-stayalive.js

'use strict';
const seen = new Set();
const $KNOWS_TO_HIDE = Symbol('knowsToHide');
exports.onWindow = window => {
  if (window[$KNOWS_TO_HIDE]) return;
  window[$KNOWS_TO_HIDE] = true;
  window.rpc.on('hide', () => setTimeout(() => window.hide(), 0));
};
exports.middleware = store => next => action => {
  switch (action.type) {
    case 'SESSION_USER_EXIT':
    case 'SESSION_PTY_EXIT':
      if (Object.keys(store.getState().sessions.sessions).length === 1) {
        const {ui} = store.getState();
        const {cols, rows, cwd} = ui;
        store.dispatch({
          type: 'TERM_GROUP_REQUEST',
          effect: () => {
            if (seen.has(action.uid)) return;
            seen.add(action.uid);
            global.rpc.emit('new', {
              isNewGroup: true,
              cols,
              rows,
              cwd,
            });
            global.rpc.emit('hide', {});
            setTimeout(() => next(action), 100);
            setTimeout(() => seen.delete(action.uid), 5000);
          },
        });
        return;
      }
      break;
  }
  next(action);
};

This is pretty hacky but works fine as long as you don't spam "close tab" commands. Sometimes it opens two tabs instead of one. No idea why that is.

There's a bug when using multiple windows so don't do that.