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<?php
/*=======================================================================
// File:        JPGRAPH_UTILS.INC
// Description: Collection of non-essential "nice to have" utilities 
// Created:     2005-11-20
// Ver:         $Id: jpgraph_utils.inc.php 781 2006-10-08 08:07:47Z ljp $
//
// Copyright (c) Aditus Consulting. All rights reserved.
//========================================================================
*/

//===================================================
// CLASS FuncGenerator
// Description: Utility class to help generate data for function plots. 
// The class supports both parametric and regular functions.
//===================================================
class FuncGenerator {
    private $iFunc='',$iXFunc='',$iMin,$iMax,$iStepSize;
        
    function FuncGenerator($aFunc,$aXFunc='') {
        $this->iFunc = $aFunc;
        $this->iXFunc = $aXFunc;
    }
        
    function E($aXMin,$aXMax,$aSteps=50) {
        $this->iMin = $aXMin;
        $this->iMax = $aXMax;
        $this->iStepSize = ($aXMax-$aXMin)/$aSteps;

        if( $this->iXFunc != '' )
            $t = 'for($i='.$aXMin.'; $i<='.$aXMax.'; $i += '.$this->iStepSize.') {$ya[]='.$this->iFunc.';$xa[]='.$this->iXFunc.';}';
        elseif( $this->iFunc != '' )
            $t = 'for($x='.$aXMin.'; $x<='.$aXMax.'; $x += '.$this->iStepSize.') {$ya[]='.$this->iFunc.';$xa[]=$x;} $x='.$aXMax.';$ya[]='.$this->iFunc.';$xa[]=$x;';
        else
            JpGraphError::RaiseL(24001);//('FuncGenerator : No function specified. ');
                        
        @eval($t);
                
        // If there is an error in the function specifcation this is the only
        // way we can discover that.
        if( empty($xa) || empty($ya) )
            JpGraphError::RaiseL(24002);//('FuncGenerator : Syntax error in function specification ');
                                
        return array($xa,$ya);
    }
}

//=============================================================================
// CLASS SymChar
// Description: Code values for some commonly used characters that 
//              normally isn't available directly on the keyboard, for example
//              mathematical and greek symbols.
//=============================================================================
class  SymChar {
    static function Get($aSymb,$aCapital=FALSE) {
        $iSymbols = array(
    /* Greek */
        array('alpha','03B1','0391'),
        array('beta','03B2','0392'),
        array('gamma','03B3','0393'),
        array('delta','03B4','0394'),
        array('epsilon','03B5','0395'),
        array('zeta','03B6','0396'),
        array('ny','03B7','0397'),
        array('eta','03B8','0398'),
        array('theta','03B8','0398'),
        array('iota','03B9','0399'),
        array('kappa','03BA','039A'),
        array('lambda','03BB','039B'),
        array('mu','03BC','039C'),
        array('nu','03BD','039D'),
        array('xi','03BE','039E'),
        array('omicron','03BF','039F'),
        array('pi','03C0','03A0'),
        array('rho','03C1','03A1'),
        array('sigma','03C3','03A3'),
        array('tau','03C4','03A4'),
        array('upsilon','03C5','03A5'),
        array('phi','03C6','03A6'),
        array('chi','03C7','03A7'),
        array('psi','03C8','03A8'),
        array('omega','03C9','03A9'),
    /* Money */
        array('euro','20AC'),
        array('yen','00A5'),
        array('pound','20A4'),
    /* Math */
        array('approx','2248'),
        array('neq','2260'),
        array('not','2310'),
        array('def','2261'),
        array('inf','221E'),
        array('sqrt','221A'),
        array('int','222B'),
    /* Misc */
        array('copy','00A9'),
        array('para','00A7'));

        $n = count($iSymbols);
        $i=0;
        $found = false;
        $aSymb = strtolower($aSymb);
        while( $i < $n && !$found ) {
            $found = $aSymb === $iSymbols[$i++][0];
        }
        if( $found ) {
            $ca = $iSymbols[--$i];
            if( $aCapital && count($ca)==3 ) 
                $s = $ca[2];
            else
                $s = $ca[1];
            return sprintf('&#%04d;',hexdec($s));
        }
        else
            return '';
    }
}


//=============================================================================
// CLASS DateScaleUtils
// Description: Help to create a manual date scale
//=============================================================================
DEFINE('DSUTILS_MONTH',1); // Major and minor ticks on a monthly basis
DEFINE('DSUTILS_MONTH1',1); // Major and minor ticks on a monthly basis
DEFINE('DSUTILS_MONTH2',2); // Major ticks on a bi-monthly basis
DEFINE('DSUTILS_MONTH3',3); // Major icks on a tri-monthly basis
DEFINE('DSUTILS_MONTH6',4); // Major on a six-monthly basis
DEFINE('DSUTILS_WEEK1',5); // Major ticks on a weekly basis
DEFINE('DSUTILS_WEEK2',6); // Major ticks on a bi-weekly basis
DEFINE('DSUTILS_WEEK4',7); // Major ticks on a quod-weekly basis
DEFINE('DSUTILS_DAY1',8); // Major ticks on a daily basis
DEFINE('DSUTILS_DAY2',9); // Major ticks on a bi-daily basis
DEFINE('DSUTILS_DAY4',10); // Major ticks on a qoud-daily basis
DEFINE('DSUTILS_YEAR1',11); // Major ticks on a yearly basis
DEFINE('DSUTILS_YEAR2',12); // Major ticks on a bi-yearly basis
DEFINE('DSUTILS_YEAR5',13); // Major ticks on a five-yearly basis


class DateScaleUtils {
    private $starthour,$startmonth, $startday, $startyear;
    private $endmonth, $endyear, $endday;
    private $tickPositions=array(),$minTickPositions=array();
    private $iUseWeeks = true;

    function UseWeekFormat($aFlg) {
        $this->iUseWeeks = $aFlg;
    }

    function doYearly($aType,$aMinor=false) {
        $i=0; $j=0;
        $m = $this->startmonth;
        $y = $this->startyear;

        if( $this->startday == 1 ) {
            $this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);
        }
        ++$m;


        switch( $aType ) {
            case DSUTILS_YEAR1:
                for($y=$this->startyear; $y <= $this->endyear; ++$y ) {
                    if( $aMinor ) {
                        while( $m <= 12 ) {
                            if( !($y == $this->endyear && $m > $this->endmonth) ) {
                                $this->minTickPositions[$j++] = mktime(0,0,0,$m,1,$y);
                            }
                            ++$m;
                        }
                        $m=1;
                    }
                    $this->tickPositions[$i++] = mktime(0,0,0,1,1,$y);    
                }
                break;
            case DSUTILS_YEAR2:
                $y=$this->startyear; 
                while( $y <= $this->endyear ) {
                    $this->tickPositions[$i++] = mktime(0,0,0,1,1,$y);    
                    for($k=0; $k < 1; ++$k ) { 
                        ++$y;
                        if( $aMinor ) {
                            $this->minTickPositions[$j++] = mktime(0,0,0,1,1,$y);
                        }
                    }
                    ++$y;
                }
                break;
            case DSUTILS_YEAR5:
                $y=$this->startyear; 
                while( $y <= $this->endyear ) {
                    $this->tickPositions[$i++] = mktime(0,0,0,1,1,$y);    
                    for($k=0; $k < 4; ++$k ) { 
                        ++$y;
                        if( $aMinor ) {
                            $this->minTickPositions[$j++] = mktime(0,0,0,1,1,$y);
                        }
                    }
                    ++$y;
                }
                break;
        }
    }

    function doDaily($aType,$aMinor=false) {
        $m = $this->startmonth;
        $y = $this->startyear;
        $d = $this->startday;
        $h = $this->starthour;
        $i=0;$j=0;

        if( $h == 0 ) {
            $this->tickPositions[$i++] = mktime(0,0,0,$m,$d,$y);
            $t = mktime(0,0,0,$m,$d,$y);            
        }
        else {
            $t = mktime(0,0,0,$m,$d,$y);            
        }
        switch($aType) {
            case DSUTILS_DAY1:
                while( $t <= $this->iMax ) {
                    $t += 3600*24;
                    $this->tickPositions[$i++] = $t;
                }
                break;
            case DSUTILS_DAY2:
                while( $t <= $this->iMax ) {
                    $t += 3600*24;
                    if( $aMinor ) {
                        $this->minTickPositions[$j++] = $t;
                    }
                    $t += 3600*24;
                    $this->tickPositions[$i++] = $t;
                }
                break;
            case DSUTILS_DAY4:
                while( $t <= $this->iMax ) {
                    for($k=0; $k < 3; ++$k ) {
                        $t += 3600*24;
                        if( $aMinor ) {
                            $this->minTickPositions[$j++] = $t;
                        }
                    }
                    $t += 3600*24;
                    $this->tickPositions[$i++] = $t;
                }
                break;
        }
    }

    function doWeekly($aType,$aMinor=false) {
        $hpd = 3600*24;
        $hpw = 3600*24*7;
        // Find out week number of min date
        $thursday = $this->iMin + $hpd * (3 - (date('w', $this->iMin) + 6) % 7);
        $week = 1 + (date('z', $thursday) - (11 - date('w', mktime(0, 0, 0, 1, 1, date('Y', $thursday)))) % 7) / 7;
        $daynumber = date('w',$this->iMin);
        if( $daynumber == 0 ) $daynumber = 7;
        $m = $this->startmonth;
        $y = $this->startyear;
        $d = $this->startday;
        $i=0;$j=0;
        // The assumption is that the weeks start on Monday. If the first day
        // is later in the week then the first week tick has to be on the following
        // week.
        if( $daynumber == 1 ) {
            $this->tickPositions[$i++] = mktime(0,0,0,$m,$d,$y);
            $t = mktime(0,0,0,$m,$d,$y) + $hpw;
        }
        else {
            $t = mktime(0,0,0,$m,$d,$y) + $hpd*(8-$daynumber);
        }

        switch($aType) {
            case DSUTILS_WEEK1:
                $cnt=0;
                break;
            case DSUTILS_WEEK2:
                $cnt=1;
                break;
            case DSUTILS_WEEK4:
                $cnt=3;
                break;
        }
        while( $t <= $this->iMax ) {
            $this->tickPositions[$i++] = $t;
            for($k=0; $k < $cnt; ++$k ) {
                $t += $hpw;
                if( $aMinor ) {
                    $this->minTickPositions[$j++] = $t;
                }
            }
            $t += $hpw;
        }
    }

    function doMonthly($aType,$aMinor=false) {
        $monthcount=0;
        $m = $this->startmonth;
        $y = $this->startyear;
        $i=0; $j=0;

        // Skip the first month label if it is before the startdate
        if( $this->startday == 1 ) {
            $this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);
            $monthcount=1;
        }
        if( $aType == 1 ) {
            if( $this->startday < 15 ) {
                $this->minTickPositions[$j++] = mktime(0,0,0,$m,15,$y);
            }
        }
        ++$m;

        // Loop through all the years included in the scale
        for($y=$this->startyear; $y <= $this->endyear; ++$y ) {
            // Loop through all the months. There are three cases to consider:
            // 1. We are in the first year and must start with the startmonth
            // 2. We are in the end year and we must stop at last month of the scale
            // 3. A year in between where we run through all the 12 months
            $stopmonth = $y == $this->endyear ? $this->endmonth : 12;
            while( $m <= $stopmonth ) {
                switch( $aType ) {
                    case DSUTILS_MONTH1: 
                        // Set minor tick at the middle of the month
                        if( $aMinor ) {
                            if( $m <= $stopmonth ) {
                                if( !($y==$this->endyear && $m==$stopmonth && $this->endday < 15) ) 
                                $this->minTickPositions[$j++] = mktime(0,0,0,$m,15,$y);
                            }
                        }
                        // Major at month 
                        // Get timestamp of first hour of first day in each month
                        $this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);

                        break;
                    case DSUTILS_MONTH2: 
                        if( $aMinor ) {
                            // Set minor tick at start of each month
                            $this->minTickPositions[$j++] = mktime(0,0,0,$m,1,$y);
                        }

                        // Major at every second month 
                        // Get timestamp of first hour of first day in each month
                        if( $monthcount % 2 == 0 ) {
                            $this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);
                        }
                        break;
                    case DSUTILS_MONTH3: 
                        if( $aMinor ) {
                            // Set minor tick at start of each month
                            $this->minTickPositions[$j++] = mktime(0,0,0,$m,1,$y);
                        }
                            // Major at every third month 
                        // Get timestamp of first hour of first day in each month
                        if( $monthcount % 3 == 0 ) {
                            $this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);
                        }
                        break;
                    case DSUTILS_MONTH6: 
                        if( $aMinor ) {
                            // Set minor tick at start of each month
                            $this->minTickPositions[$j++] = mktime(0,0,0,$m,1,$y);
                        }
                        // Major at every third month 
                        // Get timestamp of first hour of first day in each month
                        if( $monthcount % 6 == 0 ) {
                            $this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);
                        }
                        break;
                }
                ++$m;
                ++$monthcount;
            }
            $m=1;
        }

        // For the case where all dates are within the same month
        // we want to make sure we have at least two ticks on the scale
        // since the scale want work properly otherwise
        if($this->startmonth == $this->endmonth && $this->startyear == $this->endyear && $aType==1 ) {
            $this->tickPositions[$i++] = mktime(0 ,0 ,0, $this->startmonth + 1, 1, $this->startyear);
        } 

        return array($this->tickPositions,$this->minTickPositions);
    }

    function GetTicks($aData,$aType=1,$aMinor=false,$aEndPoints=false) {
        $n = count($aData);
        return $this->GetTicksFromMinMax($aData[0],$aData[$n-1],$aType,$aMinor,$aEndPoints);
    }

    function GetAutoTicks($aMin,$aMax,$aMaxTicks=10,$aMinor=false) {
        $diff = $aMax - $aMin;
        $spd = 3600*24;
        $spw = $spd*7;
        $spm = $spd*30;
        $spy = $spd*352;

        if( $this->iUseWeeks )
            $w = 'W';
        else
            $w = 'd M';

        // Decision table for suitable scales
        // First value: Main decision point
        // Second value: Array of formatting depending on divisor for wanted max number of ticks. <divisor><formatting><format-string>,..
        $tt = array( 
            array($spw, array(1,DSUTILS_DAY1,'d M',2,DSUTILS_DAY2,'d M',-1,DSUTILS_DAY4,'d M')),
            array($spm, array(1,DSUTILS_DAY1,'d M',2,DSUTILS_DAY2,'d M',4,DSUTILS_DAY4,'d M',
                              7,DSUTILS_WEEK1,$w,-1,DSUTILS_WEEK2,$w)),
            array($spy, array(1,DSUTILS_DAY1,'d M',2,DSUTILS_DAY2,'d M',4,DSUTILS_DAY4,'d M',
                              7,DSUTILS_WEEK1,$w,14,DSUTILS_WEEK2,$w,
                              30,DSUTILS_MONTH1,'M',60,DSUTILS_MONTH2,'M',-1,DSUTILS_MONTH3,'M')),
            array(-1, array(30,DSUTILS_MONTH1,'M-Y',60,DSUTILS_MONTH2,'M-Y',90,DSUTILS_MONTH3,'M-Y',
                            180,DSUTILS_MONTH6,'M-Y',352,DSUTILS_YEAR1,'Y',704,DSUTILS_YEAR2,'Y',-1,DSUTILS_YEAR5,'Y')));

        $ntt = count($tt);
        $nd = floor($diff/$spd);
        for($i=0; $i < $ntt; ++$i ) {
            if( $diff <= $tt[$i][0] || $i==$ntt-1) {
                $t = $tt[$i][1];
                $n = count($t)/3;
                for( $j=0; $j < $n; ++$j ) {
                    if( $nd/$t[3*$j] <= $aMaxTicks || $j==$n-1) {
                        $type = $t[3*$j+1];
                        $fs = $t[3*$j+2];
                        list($tickPositions,$minTickPositions) = $this->GetTicksFromMinMax($aMin,$aMax,$type,$aMinor);
                        return array($fs,$tickPositions,$minTickPositions,$type);
                    }
                }
            }
        }
    }

    function GetTicksFromMinMax($aMin,$aMax,$aType,$aMinor=false,$aEndPoints=false) {
        $this->starthour = date('G',$aMin);
        $this->startmonth = date('n',$aMin);
        $this->startday = date('j',$aMin);
        $this->startyear = date('Y',$aMin);
        $this->endmonth = date('n',$aMax);
        $this->endyear = date('Y',$aMax);
        $this->endday = date('j',$aMax);
        $this->iMin = $aMin;
        $this->iMax = $aMax;

        if( $aType <= DSUTILS_MONTH6 ) {
            $this->doMonthly($aType,$aMinor);
        }
        elseif( $aType <= DSUTILS_WEEK4 ) {
            $this->doWeekly($aType,$aMinor);
        }
        elseif( $aType <= DSUTILS_DAY4 ) {
            $this->doDaily($aType,$aMinor);
        }
        elseif( $aType <= DSUTILS_YEAR5 ) {
            $this->doYearly($aType,$aMinor);
        }
        else {
            JpGraphError::RaiseL(24003);
        }
        // put a label at the very left data pos
        if( $aEndPoints ) {
            $tickPositions[$i++] = $aData[0];
        }

        // put a label at the very right data pos
        if( $aEndPoints ) {
            $tickPositions[$i] = $aData[$n-1];
        }

        return array($this->tickPositions,$this->minTickPositions);
    }

}

//=============================================================================
// Class ReadFileData
//=============================================================================
Class ReadFileData {

    //----------------------------------------------------------------------------
    // Desciption:
    // Read numeric data from a file. 
    // Each value should be separated by either a new line or by a specified 
    // separator character (default is ',').
    // Before returning the data each value is converted to a proper float 
    // value. The routine is robust in the sense that non numeric data in the 
    // file will be discarded.
    //
    // Returns: 
    // The number of data values read on success, FALSE on failure
    //----------------------------------------------------------------------------
    static function FromCSV($aFile,&$aData,$aSepChar=',',$aMaxLineLength=1024) {
        $rh = fopen($aFile,'r');
        if( $rh === false )
            return false;
        $tmp = array();
        $lineofdata = fgetcsv($rh, 1000, ',');
        while ( $lineofdata !== FALSE) {
            $tmp = array_merge($tmp,$lineofdata);
            $lineofdata = fgetcsv($rh, $aMaxLineLength, $aSepChar);
        }
        fclose($rh);

        // Now make sure that all data is numeric. By default
        // all data is read as strings
        $n = count($tmp);
        $aData = array();
        $cnt=0;
        for($i=0; $i < $n; ++$i) {
            if( $tmp[$i] !== "" ) {
                $aData[$cnt++] = floatval($tmp[$i]);
            }
        }
        return $cnt;
    }
}

?>