Retrieving All Company Call Logs for Realtime Custom Wallboards

Here is some code snippet in Node JS to read large call logs with multiple pages. It shows one way how to deal with API rate limit also.

var SDK = require('ringcentral')

RINGCENTRAL_CLIENTID = "app-client-id";
RINGCENTRAL_CLIENTSECRET = "app-client-secret";
RINGCENTRAL_SERVER = 'https://platform.ringcentral.com'

RINGCENTRAL_USERNAME = "";
RINGCENTRAL_PASSWORD = "";
RINGCENTRAL_EXTENSION = "";

var rcsdk = new SDK({
      server: RINGCENTRAL_SERVER,
      appKey: RINGCENTRAL_CLIENTID,
      appSecret: RINGCENTRAL_CLIENTSECRET
  });
var platform = rcsdk.platform();
var startTime = 0
platform.login({
      username: RINGCENTRAL_USERNAME,
      password: RINGCENTRAL_PASSWORD,
      extension: RINGCENTRAL_EXTENSION
      })
      .then(function(resp) {
        var jsonObj = resp.response().heade
        use_dynamic_limit_value()
      });

function use_dynamic_limit_value(){
  startTime = Date.now()
  platform.get('/account/~/call-log', {
          dateFrom: "2020-01-01T00:00:00.000Z",
          view: "Simple",
          perPage: 1000
      })
      .then(function (resp) {
        console.log("======= WRITE RECORDS TO YOUR DB =======")
        for (var record of resp.json().records){
          console.log(JSON.stringify(record))
          console.log("======= ^^^^^ ========")
        }
        var navigationObj = resp.json().navigation
        if (navigationObj.hasOwnProperty("nextPage")){
          read_calllog_nextpage(navigationObj.nextPage.uri)
        }else{
          console.log("DONE - no next page")
        }
      });
}
function read_calllog_nextpage(url){
  platform.get(url)
    .then(function (resp) {
      console.log("======= WRITE RECORDS TO YOUR DB =======")
      for (var record of resp.json().records){
        console.log(JSON.stringify(record))
        console.log("======= ^^^^^ ========")
      }
      var jsonObj = resp.response().headers
      var limit = parseInt(jsonObj['_headers']['x-rate-limit-limit'][0])
      var limitRemaining = parseInt(jsonObj['_headers']['x-rate-limit-remaining'][0])
      var limitWindow = parseInt(jsonObj['_headers']['x-rate-limit-window'][0])

      var navigationObj = resp.json().navigation
      if (navigationObj.hasOwnProperty("nextPage")){
        var delayInterval = 0
        if (limitRemaining == 0){
            console.log("No remaining => calculate waiting time")
            var now = Date.now()
            var diff = now - startTime
            delayInterval = (limitWindow / limit) * 1000
            startTime = now + delayInterval
        }
        console.log("Read next page after " + delayInterval + " milliseconds")
        setTimeout(function(){
            read_calllog_nextpage(navigationObj.nextPage.uri)
        }, delayInterval)
      }else{
        console.log("DONE - no more next page")
      }
    });
}

As you said you want to read the data as near realtime as possible, there might be many calls being active when you read the call log. There are a few ways to deal with those call records and here is one of the possible ways. Call the company active calls API before each time you read the account call logs. keep the active calls' session id on a list, then keep track of those calls when they are completed (polling or using the telephony session notification) then read the call log with the sessionId to fetch the record and sync with your database.

function read_company_active_call(){
    platform.get('/account/~/active-calls',
              view: "Simple"
        })
        .then(function (resp) {
          var jsonObj = resp.json()
          for (var record of jsonObj.records){
            console.log(record.sessionId)
          }
        })
        .catch(function(e){
          console.log(e.message)
        });
}