google.script.run promise wrapper

google.script.run.promise.js

// turns google.script.run into an object with a promise api
function scriptRunPromise()
  var gs = {};
  var ks = Object.keys(google.script.run);
  for (var i=0; i < ks.length; i++) {
    gs[ks[i]] = (function(k) {
      return function() {
        var args = arguments;
        return Promise(function(resolve, reject) {
          google.script.run
            .withSuccessHandler(resolve)
            .withFailureHandler(reject)
            [k].apply(google.script.run, args);
        });
      }
    })(ks[i])
  }
  return gs;
}


// USAGE:

var g = scriptRunPromise();
g.myServerMethod().then(function(result) {
  // blah
})
.catch(function(e) {
  // blah
})

I'm trying to use this promise wrapper as part of an experiment with using angular.js and google.script.run calls, and I'm struggling to get the methods here to work. The console error is "undefined is not a promise" at the line that returns the promise from ScriptRunPromise... any ideas what I might be doing wrong?

`<script> (function() {
'use strict';
angular.module('MyApp', ['ngMaterial'])
.controller('SidebarController', function() {
var self = this;
// USAGE:
var g = scriptRunPromise();
g.listAllDomainGroups().then(function(result) {
console.log(result);
}) .catch(function(e) {
// blah
})
console.log('sanity check');
});

// turns google.script.run into an object with a promise api
function scriptRunPromise() {
var gs = {};
var ks = Object.keys(google.script.run);
for (var i=0; i < ks.length; i++) {
gs[ks[i]] = (function(k) {
return function() {
var args = arguments;
return Promise(function(resolve, reject) {
google.script.run .withSuccessHandler(resolve) .withFailureHandler(reject) [k].apply(google.script.run, args); }); } })(ks[i]) } return gs; } })();
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`

Just in case anybody still tries to get this to work, line 9 is missing the new operator when generating the promise.

return new Promise(function(resolve, reject) {

As an Angular service:

.service('GoogleScriptService', [function () {
  var keys = Object.keys(google.script.run);
  for (var i=0; i < keys.length; i++) {
    this[keys[i]] = (function (key) {
      return function() {
        var args = arguments;
        return new Promise(
          function(resolve, reject) {
            google.script.run
            .withSuccessHandler(resolve)
            .withFailureHandler(reject)
            [key].apply(google.script.run, args);
          }
        );
      }
    })(keys[i]);
  }
}])

Usage:

.controller('testCtrl', ['GoogleScriptService', function (GoogleScriptService) {
  var appsScript = GoogleScriptService;
  appsScript.myFunction()
  .then(resolveFunction)
  .catch(rejectFunction);
}])