portainer/app/azure/services/azureService.js

angular.module('portainer.azure').factory('AzureService', [
  '$q',
  'Azure',
  'SubscriptionService',
  'ResourceGroupService',
  'ContainerGroupService',
  'ProviderService',
  function AzureServiceFactory($q, Azure, SubscriptionService, ResourceGroupService, ContainerGroupService, ProviderService) {
    'use strict';
    var service = {};

    service.deleteContainerGroup = function (id) {
      return Azure.delete(id, '2018-04-01');
    };

    service.createContainerGroup = function (model, subscriptionId, resourceGroupName) {
      return ContainerGroupService.create(model, subscriptionId, resourceGroupName);
    };

    service.subscriptions = function () {
      return SubscriptionService.subscriptions();
    };

    service.containerInstanceProvider = function (subscriptions) {
      return retrieveResourcesForEachSubscription(subscriptions, ProviderService.containerInstanceProvider);
    };

    service.resourceGroups = function (subscriptions) {
      return retrieveResourcesForEachSubscription(subscriptions, ResourceGroupService.resourceGroups);
    };

    service.containerGroups = function (subscriptions) {
      return retrieveResourcesForEachSubscription(subscriptions, ContainerGroupService.containerGroups);
    };

    service.aggregate = function (resourcesBySubcription) {
      var aggregatedResources = [];
      Object.keys(resourcesBySubcription).forEach(function (key) {
        aggregatedResources = aggregatedResources.concat(resourcesBySubcription[key]);
      });
      return aggregatedResources;
    };

    function retrieveResourcesForEachSubscription(subscriptions, resourceQuery) {
      var deferred = $q.defer();

      var resources = {};

      var resourceQueries = [];
      for (var i = 0; i < subscriptions.length; i++) {
        var subscription = subscriptions[i];
        resourceQueries.push(resourceQuery(subscription.Id));
      }

      $q.all(resourceQueries)
        .then(function success(data) {
          for (var i = 0; i < data.length; i++) {
            var result = data[i];
            resources[subscriptions[i].Id] = result;
          }
          deferred.resolve(resources);
        })
        .catch(function error(err) {
          deferred.reject({ msg: 'Unable to retrieve resources', err: err });
        });

      return deferred.promise;
    }

    return service;
  },
]);