DataTables+daterangepciker integraton for server-side data processing -- 2

I need DataTables ([login to view URL]) integration with DateRangePicker ([login to view URL]) for a current app project. I am stuck at the DataTables serverside processing script and I need help to finish it and also add some extra queries to it. The idea is to be able to display statistics per day based on the criteria set by daterangepicker, else display only today stats. Daterangepicker sends date ranges to datatables serverside processing script and it gets these dates to display stats based on that. Stats columns are raw visits, unique visits, transactions number, sales ratio, earnings and the data is all present in the mysql database and also I need a button on each row, if there is a transaction to show in extra data with per country details and 4 trackers in the extra field activated with the button like in the example provided here: [login to view URL]