portainer/app/extensions/registry-management/services/registryGitlabService.js

import _ from 'lodash-es';
import { RegistryGitlabProject } from '../models/gitlabRegistry';
import { RegistryRepositoryGitlabViewModel } from '../models/registryRepository';

angular.module('portainer.extensions.registrymanagement')
.factory('RegistryGitlabService', ['$async', 'Gitlab',
function RegistryGitlabServiceFactory($async, Gitlab) {
  'use strict';
  var service = {};

  /**
   * PROJECTS
   */

  async function _getProjectsPage(env, params, projects) {
    const response = await Gitlab(env).projects(params).$promise;
    projects = _.concat(projects, response.data);
    if (response.next) {
      params.page = response.next;
      projects = await _getProjectsPage(env, params, projects);
    }
    return projects;
  }

  async function projectsAsync(url, token) {
    try {
      const data = await _getProjectsPage({url: url, token: token}, {page: 1}, []);
      return _.map(data, (project) => new RegistryGitlabProject(project));
    } catch (error) {
      throw {msg: 'Unable to retrieve projects', err: error};
    }
  }

  /**
   * END PROJECTS
   */

  /**
   * REPOSITORIES
   */

  async function _getRepositoriesPage(params, repositories) {
    const response = await Gitlab().repositories(params).$promise;
    repositories = _.concat(repositories, response.data);
    if (response.next) {
      params.page = response.next;
      repositories = await _getRepositoriesPage(params, repositories);
    }
    return repositories;
  }

  async function repositoriesAsync(registry) {
    try {
      const params = {
        id: registry.Id,
        projectId: registry.Gitlab.ProjectId,
        page: 1
      };
      const data = await _getRepositoriesPage(params, []);
      return _.map(data, (r) => new RegistryRepositoryGitlabViewModel(r));
    } catch (error) {
      throw {msg: 'Unable to retrieve repositories', err: error};
    }
  }

  /**
   * END REPOSITORIES
   */

  /**
   * SERVICE FUNCTIONS DECLARATION
   */

  function projects(url, token) {
    return $async(projectsAsync, url, token);
  }

  function repositories(registry) {
    return $async(repositoriesAsync, registry);
  }

  service.projects = projects;
  service.repositories = repositories;
  return service;
}
]);