PubNub / Esri geocoding block

geocode.js

// Test Payload
{
  "text": "Disneyland"
}

// block
export default (request) => {
    let xhr = require('xhr');
    let query = require('codec/query_string');
    
    // one off geocoding requests do not require authentication if the results are *not* stored
    // https://developers.arcgis.com/rest/geocode/api-reference/geocoding-free-vs-paid.htm
    
    let apiUrl = 'https://geocode.arcgis.com/arcgis/rest/services/World/GeocodeServer/findAddressCandidates';
    let searchParam = request.message.text;

    // return if the block does not have anything to analyze
    if (!query) {
        return request.ok();
    }
    
    let queryParams = {
        singleLine: searchParam,
        outFields: "*",
        f: 'json'
    };

    let url = apiUrl + '?' + query.stringify(queryParams);
    
    return xhr.fetch(url)
        .then((response) => {
            return response.json()
                .then((parsedResponse) => {
                    request.message.geocode = parsedResponse;
                    console.log(request.message.geocode.candidates.length + ' candidates found');
                    return request;
                })
                .catch((err) => {
                    console.log('error happened on JSON parse', err);
                    return request;
                });
        })
        .catch((err) => {
            console.log('error happened for XHR.fetch', err);
            return request;
        });

};