How to create a AngularJS promise from a callback-based API

How to create a AngularJS promise from a callback-based API

To create an AngularJS promise from a callback-based API such as WifiWizard.connectNetwork, use $q.defer:

function connectWifi(wifi_ssid) {
   var future = $q.defer();
   var win_wifi = future.resolve;
   var fail_wifi = future.reject;
   WifiWizard.connectNetwork(wifi_ssid, win_wifi, fail_wifi);
   return future.promise;       
};

The above example returns a $q Service promise that either resolves or rejects using the callbacks from the API.