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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

abstract class Report extends CI_Model 
{
    function __construct()
    {
        parent::__construct();

        //Make sure the report is not cached by the browser
        $this->output->set_header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
        $this->output->set_header('Cache-Control: no-store, no-cache, must-revalidate');
        $this->output->set_header('Cache-Control: post-check=0, pre-check=0', FALSE);
        $this->output->set_header('Pragma: no-cache');
    }

    // Returns the column names used for the report
    public abstract function getDataColumns();
    
    // Returns all the data to be populated into the report
    public abstract function getData(array $inputs);
    
    // Returns key=>value pairing of summary data for the report
    public abstract function getSummaryData(array $inputs);
}
?>