Query Salesforce Used in a picker to select an object in salesforce by user input e.g. phone number or name

action.js

const jsforce = require('jsforce');

function phoneQuery(number, objects) {
  let digits = number.replace(/\D/g,'').split("");
  if (digits.length > 10) {
    let country_code = digits.shift();
  }
  let npa = [];
  npa.push(digits.shift());
  npa.push(digits.shift());
  npa.push(digits.shift());
  npa = npa.join("");
  let nxx = [];
  nxx.push(digits.shift());
  nxx.push(digits.shift());
  nxx.push(digits.shift());
  nxx = nxx.join("");
  let lnumber = digits.join("");
  //console.log("npa: " + npa + ", nxx:" + nxx + ", lnum:" + lnumber);
  const search_number = [npa, nxx, lnumber].join("*");
  return `FIND {${search_number}} IN PHONE FIELDS RETURNING ${objects}`;
}

exports.handler = function(event, context, callback) {
  const conn = new jsforce.Connection({
    instanceUrl : event.salesforce.instanceUrl,
    accessToken : event.salesforce.token
  });
  const objects = process.env.Object.split(",").map ( (o) => {
    return `${o}(Id,Name,Email)`
  }).join(',');
  const callId = event.activity.id;
  
  // the pickers for custom fields will pass an options.input as the user input for the search
  let searchQuery = event.options.input;
  let sosl = null;
  
  if (searchQuery && searchQuery.replace(/\D/g,'').length > 8) {
    // removing all format characters the input is long enough to be a phone number try querying for numbers
    sosl = phoneQuery(searchQuery.replace(/\D/g,''), objects)
  } else {
    // maybe we're looking for a name or maybe they did not provide us with any inputs
    if (searchQuery && searchQuery.length) {
      // ok maybe they want us to search by name
      sosl = `FIND {${searchQuery}} IN NAME FIELDS RETURNING ${objects}`;
    } else {
      // ok we're doing a default query by phone number
      let number = event.activity.caller_number;// convert to a searchable string
      sosl = phoneQuery(number.replace(/\D/g,''), objects)
    }
  }
  
  const changeHandler = function scriptHandler() {
    console.log("is the value:", value);
    if (window.sforce && window.sforce.opencti && typeof(sforce.opencti.screenPop) == 'function' && value.length > 3) {
      // hook a screenPop event for salesforce lightning
      sforce.opencti.screenPop({
         type: sforce.opencti.SCREENPOP_TYPE.SOBJECT, //Review the arguments section.
         params: {recordId: value }//Depends on the SCREENPOP_TYPE. Review the arguments section.
       });
    }
  }.toString();
  
  conn.search(sosl,
    function(err, res) {
      if (err) { console.log("error:", err); context.done(); return; }
      //console.log("call id:" + callId);
      const results = res.searchRecords.map( (r) => {
        //console.log(r);
        // return an object with the following:
        // text: information that is displayed to the agent about the selection
        // id: an internal reference id for the object being displayed
        return {text: `<i>${r.attributes.type}</i>- ${r.Name} <small>${r.Email}</small>`, id: r.Id };
      });
      console.log(results);
      if (!results.length) {
        // add 1 empty result so enduser can always type another search query
        results.push({text: "no matches", id: null});
      }
      context.done(null, { results: results, onChangeScript: changeHandler });
    }
  );
}