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<?php

/*=======================================================================

 // File:        JPGRAPH_DATE.PHP

 // Description: Classes to handle Date scaling

 // Created:     2005-05-02

 // Ver:         $Id: jpgraph_date.php 1106 2009-02-22 20:16:35Z ljp $

 //

 // Copyright (c) Aditus Consulting. All rights reserved.

 //========================================================================

 */

define('HOURADJ_1',0+30);

define('HOURADJ_2',1+30);

define('HOURADJ_3',2+30);

define('HOURADJ_4',3+30);

define('HOURADJ_6',4+30);

define('HOURADJ_12',5+30);

define('MINADJ_1',0+20);

define('MINADJ_5',1+20);

define('MINADJ_10',2+20);

define('MINADJ_15',3+20);

define('MINADJ_30',4+20);

define('SECADJ_1',0);

define('SECADJ_5',1);

define('SECADJ_10',2);

define('SECADJ_15',3);

define('SECADJ_30',4);

define('YEARADJ_1',0+30);

define('YEARADJ_2',1+30);

define('YEARADJ_5',2+30);

define('MONTHADJ_1',0+20);

define('MONTHADJ_6',1+20);

define('DAYADJ_1',0);

define('DAYADJ_WEEK',1);

define('DAYADJ_7',1);

define('SECPERYEAR',31536000);

define('SECPERDAY',86400);

define('SECPERHOUR',3600);

define('SECPERMIN',60);

class DateScale extends LinearScale {

    private $date_format = '';

    private $iStartAlign = false, $iEndAlign = false;

    private $iStartTimeAlign = false, $iEndTimeAlign = false;

    //---------------

    // CONSTRUCTOR

    function __construct($aMin=0,$aMax=0,$aType='x') {

        assert($aType=="x");

        assert($aMin<=$aMax);

        $this->type=$aType;

        $this->scale=array($aMin,$aMax);

        $this->world_size=$aMax-$aMin;

        $this->ticks = new LinearTicks();

        $this->intscale=true;

    }

    //------------------------------------------------------------------------------------------

    // Utility Function AdjDate()

    // Description: Will round a given time stamp to an even year, month or day

    // argument.

    //------------------------------------------------------------------------------------------

    function AdjDate($aTime,$aRound=0,$aYearType=false,$aMonthType=false,$aDayType=false) {

        $y = (int)date('Y',$aTime); $m = (int)date('m',$aTime); $d = (int)date('d',$aTime);

        $h=0;$i=0;$s=0;

        if( $aYearType !== false ) {

            $yearAdj = array(0=>1, 1=>2, 2=>5);

            if( $aRound == 0 ) {

                $y = floor($y/$yearAdj[$aYearType])*$yearAdj[$aYearType];

            }

            else {

                ++$y;

                $y = ceil($y/$yearAdj[$aYearType])*$yearAdj[$aYearType];

            }

            $m=1;$d=1;

        }

        elseif( $aMonthType !== false ) {

            $monthAdj = array(0=>1, 1=>6);

            if( $aRound == 0 ) {

                $m = floor($m/$monthAdj[$aMonthType])*$monthAdj[$aMonthType];

                $d=1;

            }

            else {

                ++$m;

                $m = ceil($m/$monthAdj[$aMonthType])*$monthAdj[$aMonthType];

                $d=1;

            }

        }

        elseif( $aDayType !== false ) {

            if( $aDayType == 0 ) {

                if( $aRound == 1 ) {

                    //++$d;

                    $h=23;$i=59;$s=59;

                }

            }

            else {

                // Adjust to an even week boundary.

                $w = (int)date('w',$aTime); // Day of week 0=Sun, 6=Sat

                if( true ) { // Adjust to start on Mon

                    if( $w==0 ) $w=6;

                    else --$w;

                }

                if( $aRound == 0 ) {

                    $d -= $w;

                }

                else {

                    $d += (7-$w);

                    $h=23;$i=59;$s=59;

                }

            }

        }

        return mktime($h,$i,$s,$m,$d,$y);

    }

    //------------------------------------------------------------------------------------------

    // Wrapper for AdjDate that will round a timestamp to an even date rounding

    // it downwards.

    //------------------------------------------------------------------------------------------

    function AdjStartDate($aTime,$aYearType=false,$aMonthType=false,$aDayType=false) {

        return $this->AdjDate($aTime,0,$aYearType,$aMonthType,$aDayType);

    }

    //------------------------------------------------------------------------------------------

    // Wrapper for AdjDate that will round a timestamp to an even date rounding

    // it upwards

    //------------------------------------------------------------------------------------------

    function AdjEndDate($aTime,$aYearType=false,$aMonthType=false,$aDayType=false) {

        return $this->AdjDate($aTime,1,$aYearType,$aMonthType,$aDayType);

    }

    //------------------------------------------------------------------------------------------

    // Utility Function AdjTime()

    // Description: Will round a given time stamp to an even time according to

    // argument.

    //------------------------------------------------------------------------------------------

    function AdjTime($aTime,$aRound=0,$aHourType=false,$aMinType=false,$aSecType=false) {

        $y = (int)date('Y',$aTime); $m = (int)date('m',$aTime); $d = (int)date('d',$aTime);

        $h = (int)date('H',$aTime); $i = (int)date('i',$aTime); $s = (int)date('s',$aTime);

        if( $aHourType !== false ) {

            $aHourType %= 6;

            $hourAdj = array(0=>1, 1=>2, 2=>3, 3=>4, 4=>6, 5=>12);

            if( $aRound == 0 )

            $h = floor($h/$hourAdj[$aHourType])*$hourAdj[$aHourType];

            else {

                if( ($h % $hourAdj[$aHourType]==0) && ($i > 0 || $s > 0) ) {

                    $h++;

                }

                $h = ceil($h/$hourAdj[$aHourType])*$hourAdj[$aHourType];

                if( $h >= 24 ) {

                    $aTime += 86400;

                    $y = (int)date('Y',$aTime); $m = (int)date('m',$aTime); $d = (int)date('d',$aTime);

                    $h -= 24;

                }

            }

            $i=0;$s=0;

        }

        elseif( $aMinType !== false ) {

            $aMinType %= 5;

            $minAdj = array(0=>1, 1=>5, 2=>10, 3=>15, 4=>30);

            if( $aRound == 0 ) {

                $i = floor($i/$minAdj[$aMinType])*$minAdj[$aMinType];

            }

            else {

                if( ($i % $minAdj[$aMinType]==0) && $s > 0 ) {

                    $i++;

                }

                $i = ceil($i/$minAdj[$aMinType])*$minAdj[$aMinType];

                if( $i >= 60) {

                    $aTime += 3600;

                    $y = (int)date('Y',$aTime); $m = (int)date('m',$aTime); $d = (int)date('d',$aTime);

                    $h = (int)date('H',$aTime); $i = 0;

                }

            }

            $s=0;

        }

        elseif( $aSecType !== false ) {

            $aSecType %= 5;

            $secAdj = array(0=>1, 1=>5, 2=>10, 3=>15, 4=>30);

            if( $aRound == 0 ) {

                $s = floor($s/$secAdj[$aSecType])*$secAdj[$aSecType];

            }

            else {

                $s = ceil($s/$secAdj[$aSecType]*1.0)*$secAdj[$aSecType];

                if( $s >= 60) {

                    $s=0;

                    $aTime += 60;

                    $y = (int)date('Y',$aTime); $m = (int)date('m',$aTime); $d = (int)date('d',$aTime);

                    $h = (int)date('H',$aTime); $i = (int)date('i',$aTime);

                }

            }

        }

        return mktime($h,$i,$s,$m,$d,$y);

    }

    //------------------------------------------------------------------------------------------

    // Wrapper for AdjTime that will round a timestamp to an even time rounding

    // it downwards.

    // Example: AdjStartTime(mktime(18,27,13,2,22,2005),false,2) => 18:20

    //------------------------------------------------------------------------------------------

    function AdjStartTime($aTime,$aHourType=false,$aMinType=false,$aSecType=false) {

        return $this->AdjTime($aTime,0,$aHourType,$aMinType,$aSecType);

    }

    //------------------------------------------------------------------------------------------

    // Wrapper for AdjTime that will round a timestamp to an even time rounding

    // it upwards

    // Example: AdjEndTime(mktime(18,27,13,2,22,2005),false,2) => 18:30

    //------------------------------------------------------------------------------------------

    function AdjEndTime($aTime,$aHourType=false,$aMinType=false,$aSecType=false) {

        return $this->AdjTime($aTime,1,$aHourType,$aMinType,$aSecType);

    }

    //------------------------------------------------------------------------------------------

    // DateAutoScale

    // Autoscale a date axis given start and end time

    // Returns an array ($start,$end,$major,$minor,$format)

    //------------------------------------------------------------------------------------------

    function DoDateAutoScale($aStartTime,$aEndTime,$aDensity=0,$aAdjust=true) {

        // Format of array

        // array ( Decision point,  array( array( Major-scale-step-array ),

        //       array( Minor-scale-step-array ),

        //       array( 0=date-adjust, 1=time-adjust, adjustment-alignment) )

        //

        $scalePoints =

        array(

        /* Intervall larger than 10 years */

        SECPERYEAR*10,array(array(SECPERYEAR*5,SECPERYEAR*2),

        array(SECPERYEAR),

        array(0,YEARADJ_1, 0,YEARADJ_1) ),

        /* Intervall larger than 2 years */

        SECPERYEAR*2,array(array(SECPERYEAR),array(SECPERYEAR),

        array(0,YEARADJ_1) ),

        /* Intervall larger than 90 days (approx 3 month) */

        SECPERDAY*90,array(array(SECPERDAY*30,SECPERDAY*14,SECPERDAY*7,SECPERDAY),

        array(SECPERDAY*5,SECPERDAY*7,SECPERDAY,SECPERDAY),

        array(0,MONTHADJ_1, 0,DAYADJ_WEEK, 0,DAYADJ_1, 0,DAYADJ_1)),

        /* Intervall larger than 30 days (approx 1 month) */

        SECPERDAY*30,array(array(SECPERDAY*14,SECPERDAY*7,SECPERDAY*2, SECPERDAY),

        array(SECPERDAY,SECPERDAY,SECPERDAY,SECPERDAY),

        array(0,DAYADJ_WEEK, 0,DAYADJ_1, 0,DAYADJ_1, 0,DAYADJ_1)),

        /* Intervall larger than 7 days */

        SECPERDAY*7,array(array(SECPERDAY,SECPERHOUR*12,SECPERHOUR*6,SECPERHOUR*2),

        array(SECPERHOUR*6,SECPERHOUR*3,SECPERHOUR,SECPERHOUR),

        array(0,DAYADJ_1, 1,HOURADJ_12, 1,HOURADJ_6, 1,HOURADJ_1)),

        /* Intervall larger than 1 day */

        SECPERDAY,array(array(SECPERDAY,SECPERHOUR*12,SECPERHOUR*6,SECPERHOUR*2,SECPERHOUR),

        array(SECPERHOUR*6,SECPERHOUR*2,SECPERHOUR,SECPERHOUR,SECPERHOUR),

        array(1,HOURADJ_12, 1,HOURADJ_6, 1,HOURADJ_1, 1,HOURADJ_1)),

        /* Intervall larger than 12 hours */

        SECPERHOUR*12,array(array(SECPERHOUR*2,SECPERHOUR,SECPERMIN*30,900,600),

        array(1800,1800,900,300,300),

        array(1,HOURADJ_1, 1,MINADJ_30, 1,MINADJ_15, 1,MINADJ_10, 1,MINADJ_5) ),

        /* Intervall larger than 2 hours */

        SECPERHOUR*2,array(array(SECPERHOUR,SECPERMIN*30,900,600,300),

        array(1800,900,300,120,60),

        array(1,HOURADJ_1, 1,MINADJ_30, 1,MINADJ_15, 1,MINADJ_10, 1,MINADJ_5) ),

        /* Intervall larger than 1 hours */

        SECPERHOUR,array(array(SECPERMIN*30,900,600,300),array(900,300,120,60),

        array(1,MINADJ_30, 1,MINADJ_15, 1,MINADJ_10, 1,MINADJ_5) ),

        /* Intervall larger than 30 min */

        SECPERMIN*30,array(array(SECPERMIN*15,SECPERMIN*10,SECPERMIN*5,SECPERMIN),

        array(300,300,60,10),

        array(1,MINADJ_15, 1,MINADJ_10, 1,MINADJ_5, 1,MINADJ_1)),

        /* Intervall larger than 1 min */

        SECPERMIN,array(array(SECPERMIN,15,10,5),

        array(15,5,2,1),

        array(1,MINADJ_1, 1,SECADJ_15, 1,SECADJ_10, 1,SECADJ_5)),

        /* Intervall larger than 10 sec */

        10,array(array(5,2),

        array(1,1),

        array(1,SECADJ_5, 1,SECADJ_1)),

        /* Intervall larger than 1 sec */

        1,array(array(1),

        array(1),

        array(1,SECADJ_1)),

        );

        $ns = count($scalePoints);

        // Establish major and minor scale units for the date scale

        $diff = $aEndTime - $aStartTime;

        if( $diff < 1 ) return false;

        $done=false;

        $i=0;

        while( ! $done ) {

            if( $diff > $scalePoints[2*$i] ) {

                // Get major and minor scale for this intervall

                $scaleSteps = $scalePoints[2*$i+1];

                $major = $scaleSteps[0][min($aDensity,count($scaleSteps[0])-1)];

                // Try to find out which minor step looks best

                $minor = $scaleSteps[1][min($aDensity,count($scaleSteps[1])-1)];

                if( $aAdjust ) {

                    // Find out how we should align the start and end timestamps

                    $idx = 2*min($aDensity,floor(count($scaleSteps[2])/2)-1);

                    if( $scaleSteps[2][$idx] === 0 ) {

                        // Use date adjustment

                        $adj = $scaleSteps[2][$idx+1];

                        if( $adj >= 30 ) {

                            $start = $this->AdjStartDate($aStartTime,$adj-30);

                            $end   = $this->AdjEndDate($aEndTime,$adj-30);

                        }

                        elseif( $adj >= 20 ) {

                            $start = $this->AdjStartDate($aStartTime,false,$adj-20);

                            $end   = $this->AdjEndDate($aEndTime,false,$adj-20);

                        }

                        else {

                            $start = $this->AdjStartDate($aStartTime,false,false,$adj);

                            $end   = $this->AdjEndDate($aEndTime,false,false,$adj);

                            // We add 1 second for date adjustment to make sure we end on 00:00 the following day

                            // This makes the final major tick be srawn when we step day-by-day instead of ending

                            // on xx:59:59 which would not draw the final major tick

                            $end++;

                        }

                    }

                    else {

                        // Use time adjustment

                        $adj = $scaleSteps[2][$idx+1];

                        if( $adj >= 30 ) {

                            $start = $this->AdjStartTime($aStartTime,$adj-30);

                            $end   = $this->AdjEndTime($aEndTime,$adj-30);

                        }

                        elseif( $adj >= 20 ) {

                            $start = $this->AdjStartTime($aStartTime,false,$adj-20);

                            $end   = $this->AdjEndTime($aEndTime,false,$adj-20);

                        }

                        else {

                            $start = $this->AdjStartTime($aStartTime,false,false,$adj);

                            $end   = $this->AdjEndTime($aEndTime,false,false,$adj);

                        }

                    }

                }

                // If the overall date span is larger than 1 day ten we show date

                $format = '';

                if( ($end-$start) > SECPERDAY ) {

                    $format = 'Y-m-d ';

                }

                // If the major step is less than 1 day we need to whow hours + min

                if( $major < SECPERDAY ) {

                    $format .= 'H:i';

                }

                // If the major step is less than 1 min we need to show sec

                if( $major < 60 ) {

                    $format .= ':s';

                }

                $done=true;

            }

            ++$i;

        }

        return array($start,$end,$major,$minor,$format);

    }

    // Overrides the automatic determined date format. Must be a valid date() format string

    function SetDateFormat($aFormat) {

        $this->date_format = $aFormat;

        $this->ticks->SetLabelDateFormat($this->date_format);

    }

    function AdjustForDST($aFlg=true) {

        $this->ticks->AdjustForDST($aFlg);

    }

    function SetDateAlign($aStartAlign,$aEndAlign=false) {

        if( $aEndAlign === false ) {

            $aEndAlign=$aStartAlign;

        }

        $this->iStartAlign = $aStartAlign;

        $this->iEndAlign = $aEndAlign;

    }

    function SetTimeAlign($aStartAlign,$aEndAlign=false) {

        if( $aEndAlign === false ) {

            $aEndAlign=$aStartAlign;

        }

        $this->iStartTimeAlign = $aStartAlign;

        $this->iEndTimeAlign = $aEndAlign;

    }

    function AutoScale($img,$aStartTime,$aEndTime,$aNumSteps,$_adummy=false) {

        // We need to have one dummy argument to make the signature of AutoScale()

        // identical to LinearScale::AutoScale

        if( $aStartTime == $aEndTime ) {

            // Special case when we only have one data point.

            // Create a small artifical intervall to do the autoscaling

            $aStartTime -= 10;

            $aEndTime += 10;

        }

        $done=false;

        $i=0;

        while( ! $done && $i < 5) {

            list($adjstart,$adjend,$maj,$min,$format) = $this->DoDateAutoScale($aStartTime,$aEndTime,$i);

            $n = floor(($adjend-$adjstart)/$maj);

            if( $n * 1.7 > $aNumSteps ) {

                $done=true;

            }

            $i++;

        }

        /*

         if( 0 ) { // DEBUG

         echo "    Start =".date("Y-m-d H:i:s",$aStartTime)."<br>";

         echo "    End   =".date("Y-m-d H:i:s",$aEndTime)."<br>";

         echo "Adj Start =".date("Y-m-d H:i:s",$adjstart)."<br>";

         echo "Adj End   =".date("Y-m-d H:i:s",$adjend)."<p>";

         echo "Major = $maj s, ".floor($maj/60)."min, ".floor($maj/3600)."h, ".floor($maj/86400)."day<br>";

         echo "Min = $min s, ".floor($min/60)."min, ".floor($min/3600)."h, ".floor($min/86400)."day<br>";

         echo "Format=$format<p>";

         }

         */

        if( $this->iStartTimeAlign !== false && $this->iStartAlign !== false ) {

            JpGraphError::RaiseL(3001);

            //('It is only possible to use either SetDateAlign() or SetTimeAlign() but not both');

        }

        if( $this->iStartTimeAlign !== false ) {

            if( $this->iStartTimeAlign >= 30 ) {

                $adjstart = $this->AdjStartTime($aStartTime,$this->iStartTimeAlign-30);

            }

            elseif(  $this->iStartTimeAlign >= 20 ) {

                $adjstart = $this->AdjStartTime($aStartTime,false,$this->iStartTimeAlign-20);

            }

            else {

                $adjstart = $this->AdjStartTime($aStartTime,false,false,$this->iStartTimeAlign);

            }

        }

        if( $this->iEndTimeAlign !== false ) {

            if( $this->iEndTimeAlign >= 30 ) {

                $adjend = $this->AdjEndTime($aEndTime,$this->iEndTimeAlign-30);

            }

            elseif(  $this->iEndTimeAlign >= 20 ) {

                $adjend = $this->AdjEndTime($aEndTime,false,$this->iEndTimeAlign-20);

            }

            else {

                $adjend = $this->AdjEndTime($aEndTime,false,false,$this->iEndTimeAlign);

            }

        }

        if( $this->iStartAlign !== false ) {

            if( $this->iStartAlign >= 30 ) {

                $adjstart = $this->AdjStartDate($aStartTime,$this->iStartAlign-30);

            }

            elseif(  $this->iStartAlign >= 20 ) {

                $adjstart = $this->AdjStartDate($aStartTime,false,$this->iStartAlign-20);

            }

            else {

                $adjstart = $this->AdjStartDate($aStartTime,false,false,$this->iStartAlign);

            }

        }

        if( $this->iEndAlign !== false ) {

            if( $this->iEndAlign >= 30 ) {

                $adjend = $this->AdjEndDate($aEndTime,$this->iEndAlign-30);

            }

            elseif(  $this->iEndAlign >= 20 ) {

                $adjend = $this->AdjEndDate($aEndTime,false,$this->iEndAlign-20);

            }

            else {

                $adjend = $this->AdjEndDate($aEndTime,false,false,$this->iEndAlign);

            }

        }

        $this->Update($img,$adjstart,$adjend);

        if( ! $this->ticks->IsSpecified() )

        $this->ticks->Set($maj,$min);

        if( $this->date_format == '' )

        $this->ticks->SetLabelDateFormat($format);

        else

        $this->ticks->SetLabelDateFormat($this->date_format);

    }

}

?>