/**
* Returns the difference between this date and the given $date
*
* It will always round to the biggest period, so 8 days ago will result in 1 week ago
* while 13 days ago will result in 2 weeks ago.
*
* @param \Zend_Date $date
* @param \Zend_Translate $translate
* @return string
*/
public function diffReadable(\Zend_Date $date, \Zend_Translate $translate)
{
$difference = $date->getUnixTimeStamp() - $this->getUnixTimestamp();
//second, minute, hour, day, week, month, year, decade
$lengths = array("60", "60", "24", "7", "4.34", "12", "10");
if ($difference > 0) {
// this was in the past
$ending = $translate->_("%s ago");
} else {
// this was in the future
$difference = -$difference;
$ending = $translate->_("%s to go");
}
for ($j = 0; $j < 7 && $difference >= $lengths[$j]; $j++) {
$difference /= $lengths[$j];
}
$difference = round($difference);
switch ($j) {
case 0:
$period = $translate->plural('second', 'seconds', $difference);
break;
case 1:
$period = $translate->plural('minute', 'minutes', $difference);
break;
case 2:
$period = $translate->plural('hour', 'hours', $difference);
break;
case 3:
$period = $translate->plural('day', 'days', $difference);
break;
case 4:
$period = $translate->plural('week', 'weeks', $difference);
break;
case 5:
$period = $translate->plural('month', 'months', $difference);
break;
case 6:
$period = $translate->plural('year', 'years', $difference);
break;
case 7:
$period = $translate->plural('decade', 'decades', $difference);
break;
default:
break;
}
$time = "{$difference} {$period}";
$text = sprintf($ending, $time);
return $text;
}
