portainer/app/docker/components/imageRegistry/porImageRegistryController.js

angular.module('portainer.docker')
  .controller('porImageRegistryController', ['$q', 'RegistryService', 'DockerHubService', 'ImageService', 'Notifications',
    function ($q, RegistryService, DockerHubService, ImageService, Notifications) {
      var ctrl = this;

      function initComponent() {
        $q.all({
          registries: RegistryService.registries(),
          dockerhub: DockerHubService.dockerhub(),
          availableImages: ctrl.autoComplete ? ImageService.images() : []
        })
          .then(function success(data) {
            var dockerhub = data.dockerhub;
            var registries = data.registries;
            ctrl.availableImages = ImageService.getUniqueTagListFromImages(data.availableImages);
            ctrl.availableRegistries = [dockerhub].concat(registries);
            if (!ctrl.registry.Id) {
              ctrl.registry = dockerhub;
            } else {
              ctrl.registry = _.find(ctrl.availableRegistries, { 'Id': ctrl.registry.Id });
            }
          })
          .catch(function error(err) {
            Notifications.error('Failure', err, 'Unable to retrieve registries');
          });
      }

      initComponent();
    }]);