Authentication, Filtering & Sorting

function getToken() {
  const authEmail = process.env.ZENDESK_AUTH_EMAIL;
  const apiKey = process.env.ZENDESK_API_TOKEN;
  return Buffer.from(`${authEmail}/token:${apiKey}`).toString('base64');
}

function getFilterConditions(params) {
  let filters = [];
  if (params.filters) {
    let filtersJson = JSON.parse(params.filters);
    if (filtersJson.aggregator) {
      filters = filtersJson.conditions;
    } else {
      filters = [filtersJson];
    }
  }

  let filterConditions = [];
  if (params.search) {
    filterConditions.push(params.search);
  }
  for (let filter of filters) {
    if (filter.field === 'id') {
      filterConditions.push(`${filter.value}`);
    } else {
      // This example shows the equals, greater than and lower than conditions
      // cf. Search operators => https://support.zendesk.com/hc/en-us/articles/203663226-Zendesk-Support-search-reference#topic_lhr_wsc_3v
      let operator = ':';
      switch (filter.operator) {
        case 'before':
          operator = '<';
          break;
        case 'after':
          operator = '>';
          break;
      }
      filterConditions.push(`${filter.field}${operator}${filter.value}`);
    }
  }
  return filterConditions;
}

function getSort(params, options) {
  let sort_by = options.default_sort_by || '';
  let sort_order = options.default_sort_order || '';

  let sort = params.sort;
  if (sort) {
    let asc = true;
    if (sort.startsWith('-')) {
      asc = false;
      sort = sort.substring(1);
    }

    const collectionName = options.collection_name;
    const authorized_fields = Liana.Schemas.schemas[collectionName].fields
      .filter((field) => field.isSortable)
      .map((field) => field.field);

    if (authorized_fields.includes(sort)) {
      sort_by = sort;
      sort_order = asc ? 'asc' : 'desc';
    }
  }
  return { sort_by, sort_order };
}