Toggle Shelly AP depending on WiFi client connection status

toggle_ap_depending_on_wifi_client_status

const ENABLE_AP_AFTER_MINS = 3;

let enableApTimer = null;

function setApStatusCb(res, errCode, errMsg, enabled) {
  if (errCode) print((enabled ? 'Enabling' : 'Disabling') + ' AP with WiFi.SetConfig failed:', errCode, errMsg);
}

function setApStatus(enabled) {
  Shelly.call('WiFi.SetConfig', { config: { ap: { enable: enabled } } }, setApStatusCb, enabled);
}

function enableApTimerCb() {
  enableApTimer = null;
  print('Enabling AP');
  setApStatus(true);
}

function handleWifiStatus(wifiConnected) {
  if (wifiConnected) {
    if (enableApTimer) {
      Timer.clear(enableApTimer);
      enableApTimer = null;
    }
    print('WiFi connected, disabling AP');
    setApStatus(false);
  } else if (!enableApTimer) {
    print('WiFi disconnected, enabling AP in ' + ENABLE_AP_AFTER_MINS + ' minute(s)');
    enableApTimer = Timer.set(ENABLE_AP_AFTER_MINS * 60 * 1000, false, enableApTimerCb);
  }
}

function handleEvent(event) {
  if (!event || !event.info || event.component !== 'wifi') return;

  if (event.info.event === 'sta_ip_acquired') {
    handleWifiStatus(true);
  } else if (event.info.event === 'sta_disconnected') {
    handleWifiStatus(false);
  }
}

Shelly.addEventHandler(handleEvent);

// initially query current wifi state manually once
function wifiStatusCb(res, errCode, errMsg) {
  if (errCode) print('WiFi.GetStatus failed:', errCode, errMsg);
  handleWifiStatus(res && res.status === 'got ip' && !errCode);
}
Shelly.call('WiFi.GetStatus', {}, wifiStatusCb);