YetiForceCompany/YetiForceCRM

<?php

/**
 * OSSEmployees module model class.
 *
 * @copyright YetiForce S.A.
 * @license   YetiForce Public License 6.5 (licenses/LicenseEN.txt or yetiforce.com)
 */
class OSSEmployees_Module_Model extends Vtiger_Module_Model
{
    public function getWorkingDays($startDate, $endDate)
    {
        $begin = strtotime($startDate);
        $end = strtotime($endDate);
        if ($begin > $end) {
            return 0;
        }
        $noDays = 0;
        $weekends = 0;
        while ($begin <= $end) {
            ++$noDays; // no of days in the given interval
            $whatDay = date('N', $begin);
            if ($whatDay > 5) { // 6 and 7 are weekend days
                ++$weekends;
            }
            $begin += 86400; // +1 day
        }
        return $noDays - $weekends;
    }

    public function getBarChartColors($chartData)
    {
        $i = 0;
        $colors = ['#4bb2c5', '#EAA228', '#c5b47f'];
        foreach ($chartData as $key => $value) {
            $result[$key] = $colors[$i];
            ++$i;
        }
        return $result;
    }
}