gitlab-org--gitlab-foss/app/assets/javascripts/groups_select.js

import $ from 'jquery';
import axios from './lib/utils/axios_utils';
import Api from './api';
import { normalizeHeaders } from './lib/utils/common_utils';

export default function groupsSelect() {
  import(/* webpackChunkName: 'select2' */ 'select2/select2')
    .then(() => {
      // Needs to be accessible in rspec
      window.GROUP_SELECT_PER_PAGE = 20;
      $('.ajax-groups-select').each(function setAjaxGroupsSelect2() {
        const $select = $(this);
        const allAvailable = $select.data('allAvailable');
        const skipGroups = $select.data('skipGroups') || [];
        const parentGroupID = $select.data('parentId');
        const groupsPath = parentGroupID
          ? Api.subgroupsPath.replace(':id', parentGroupID)
          : Api.groupsPath;

        $select.select2({
          placeholder: 'Search for a group',
          allowClear: $select.hasClass('allowClear'),
          multiple: $select.hasClass('multiselect'),
          minimumInputLength: 0,
          ajax: {
            url: Api.buildUrl(groupsPath),
            dataType: 'json',
            quietMillis: 250,
            transport(params) {
              axios[params.type.toLowerCase()](params.url, {
                params: params.data,
              })
                .then(res => {
                  const results = res.data || [];
                  const headers = normalizeHeaders(res.headers);
                  const currentPage = parseInt(headers['X-PAGE'], 10) || 0;
                  const totalPages = parseInt(headers['X-TOTAL-PAGES'], 10) || 0;
                  const more = currentPage < totalPages;

                  params.success({
                    results,
                    pagination: {
                      more,
                    },
                  });
                })
                .catch(params.error);
            },
            data(search, page) {
              return {
                search,
                page,
                per_page: window.GROUP_SELECT_PER_PAGE,
                all_available: allAvailable,
              };
            },
            results(data, page) {
              if (data.length) return { results: [] };

              const groups = data.length ? data : data.results || [];
              const more = data.pagination ? data.pagination.more : false;
              const results = groups.filter(group => skipGroups.indexOf(group.id) === -1);

              return {
                results,
                page,
                more,
              };
            },
          },
          // eslint-disable-next-line consistent-return
          initSelection(element, callback) {
            const id = $(element).val();
            if (id !== '') {
              return Api.group(id, callback);
            }
          },
          formatResult(object) {
            return `<div class='group-result'> <div class='group-name'>${
              object.full_name
            }</div> <div class='group-path'>${object.full_path}</div> </div>`;
          },
          formatSelection(object) {
            return object.full_name;
          },
          dropdownCssClass: 'ajax-groups-dropdown select2-infinite',
          // we do not want to escape markup since we are displaying html in results
          escapeMarkup(m) {
            return m;
          },
        });

        $select.on('select2-loaded', () => {
          const dropdown = document.querySelector('.select2-infinite .select2-results');
          dropdown.style.height = `${Math.floor(dropdown.scrollHeight)}px`;
        });
      });
    })
    .catch(() => {});
}