.js

getOpportunityData: function () {
    return getDateFilter('Opportunity')
      .then(function(dateFilterQuery) {
          createNewAPIQuery('Opportunity');
          dateFilter = '';

          if (apiQuery != undefined) {
              let timestamp = parseTimestamp(apiQuery[0].timestamp);
              dateFilter = '?filter[created_after]=' + timestamp;
          }
          return bhttp.get(
            HOST + '/api/private/atlas/donations' + dateFilter,
            {headers: {'Authorization': AUTH_TOKEN}}
          );
      }).then(function(response) {
          return JSON.parse(response.body).data;
      }).map(function (donationDataEntry) {
          return getDonorDataFromID(donationDataEntry.relationships.donor.data.id)
              .then(response =>
                     createNewDonationEntry(donationDataEntry, JSON.parse(response).data)
              );
      });
  },