<?php

/*

 * DDDateHelper class file

 *

 * @author Joachim Werner <joachim.werner@diggin-data.de> 



/**

 * Some date functions

 *

 * @author Joachim Werner <joachim.werner@diggin-data.de>

 */



class DDDateHelper

{

// {{{ *** Date Methods ***

// {{{ Days

// {{{ DayTomorrow

function DayTomorrow($ts=null)

{

    if($ts==null) 

        $ts=mktime();

    return strtotime("+1 day", $ts);

}

// }}} 

// {{{ DayYesterday

function DayYesterday($ts=null)

{

    if($ts==null) 

        $ts=mktime();

    return strtotime("-1 day", $ts);

} // }}} 

// {{{ DaysRange

function DaysRange($start, $end, $workingDaysOnly=false)

{

    list($year,$month,$day) = explode('-',$start);

    $start = mktime(0,0,0,$month,$day,$year);

    list($year,$month,$day) = explode('-',$end);

    $end = mktime(23,59,59,$month,$day,$year);

    $tmp = array();

    $current = $start;

    while($current<=$end) {

        if($workingDaysOnly==true and in_array(date("w",$current),array(1,2,3,4,5)))

            $tmp[] = strtotime(date("Y-m-d",$current));

        $current = $current + +60*60*24;

    }

    return $tmp;

} // }}} 

// }}} 

// {{{ Weeks

function WeekFirstDay($ts=null)

{

    if($ts==null) 

        $ts=mktime();

    $day = date("w",$ts);

    if($day==1) 

        return strtotime(date("Y-m-d",$ts));

    else

        return strtotime(date("Y-m-d",strtotime("last monday",$ts)));

}

function WeekLastDay($ts=null)

{

    if($ts==null) 

        $ts=mktime();

    $day = date("w",$ts);

    if($day==6) 

        return strtotime(date("Y-m-d",$ts));

    else

        return strtotime(date("Y-m-d",strtotime("sunday",$ts)));

}

function WeekThis($ts=null)

{

    if($ts==null) 

        $ts=mktime();

    return array(self::WeekFirstDay($ts),self::WeekLastDay($ts));

}

function WeekRelative($ts=null,$relative=0)

{

    if($ts==null) 

        $ts=mktime();

    $tsDiff = $relative*86400*7;

    return self::WeekThis($ts+$tsDiff);

}

// }}} 

// {{{ Months

function MonthFirstDay($ts=null)

{

    if($ts==null) 

        $ts=mktime();

    if(date("j",$ts)==1 )

        return strtotime(date("Y-m-d",$ts));

    else

        return strtotime(date("Y-m-d",mktime(0,0,0,date("n",$ts),1,date("Y",$ts))));    

}

function MonthLastDay($ts=null)

{

    if($ts==null) 

        $ts=mktime();

    $nextMonth = mktime(0,0,0,date("n",$ts)+1,1,date("Y",$ts));

    return strtotime(date("Y-m-d", strtotime("-1 day", $nextMonth)));

}

function MonthThis($ts=null)

{

    if($ts==null) 

        $ts=mktime();

    return array(self::MonthFirstDay($ts),self::MonthLastDay($ts));

}

function MonthRelative($ts=null,$relative=0)

{

    if($ts==null) 

        $ts=mktime();

    $tsNew = mktime(0, 0, 0, date("n",$ts)+$relative,1,date("Y",$ts));

    return self::MonthThis($tsNew);

}

// }}} 

// {{{ Quarters

function QuarterFirstDay($ts=null)

{

    if($ts==null) 

        $ts=mktime();

    $month = date("n", $ts);

    if($month>=1 and $month<=3)

        return strtotime(date("Y-m-d", mktime(0,0,0,1,1,date("Y",$ts))));

    elseif($month>=4 and $month<=6)

        return strtotime(date("Y-m-d", mktime(0,0,0,4,1,date("Y",$ts))));

    elseif($month>=7 and $month<=9)

        return strtotime(date("Y-m-d", mktime(0,0,0,7,1,date("Y",$ts))));

    else

        return strtotime(date("Y-m-d", mktime(0,0,0,10,1,date("Y",$ts))));

}

function QuarterLastDay($ts=null)

{

    $month = date("n", $ts);

    if($month>=1 and $month<=3)

        return strtotime(date("Y-m-d", mktime(0,0,0,3,31,date("Y",$ts))));

    elseif($month>=4 and $month<=6)

        return strtotime(date("Y-m-d", mktime(0,0,0,6,30,date("Y",$ts))));

    elseif($month>=7 and $month<=9)

        return strtotime(date("Y-m-d", mktime(0,0,0,9,30,date("Y",$ts))));

    else

        return strtotime(date("Y-m-d", mktime(0,0,0,12,31,date("Y",$ts))));

}

function QuarterThis($ts=null)

{

    if($ts==null) 

        $ts=mktime();

    return array(self::QuarterFirstDay($ts),self::QuarterLastDay($ts));

}

function QuarterRelative($ts=null,$relative=0)

{

    if($ts==null) 

        $ts=mktime();

    $month = date("n", $ts)+$relative*3;

    return self::QuarterThis(mktime(0,0,0,$month,1,date("Y",$ts)));

}

// }}} 

// {{{ Years

function YearFirstDay($ts=null)

{

    if($ts==null)

        $ts=mktime();

    return strtotime(date("Y-m-d",mktime(0,0,0,1,1,date("Y",$ts))));

}

function YearLastDay($ts=null)

{

    if($ts==null)

        $ts=mktime();

    return strtotime(date("Y-m-d H:i:s",mktime(23,59,59,12,31,date("Y",$ts))));

}

function YearThis($ts=null)

{

    if($ts==null)

        $ts=mktime();

    return array(self::YearFirstDay($ts),self::YearLastDay($ts));

}

function YearToDate($ts=null)

{

    if($ts==null)

        $ts=mktime();

    return array(strtotime(date("Y-m-d H:i:s", mktime(0,0,0,1,1,date("Y")))),strtotime(date("Y-m-d H:i:s",$ts)));

}

function YearRelative($ts=null,$relative=0)

{

    if($ts==null)

        $ts=mktime();

    $tsNew = mktime(0,0,0,date("n",$ts),date("j",$ts),date("Y",$ts)+$relative);

    return self::YearThis($tsNew);

}

// }}} 

// }}} 



}



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?>