<?php
/*=======================================================================
// File: 	JPGRAPH_UTILS.INC
// Description: Collection of non-essential "nice to have" utilities
// Created: 	2005-11-20
// Ver:		$Id: jpgraph_utils.inc.php 957 2007-12-01 14:00:29Z 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='';
    private $iXFunc='';
    private $iMin;
    private $iMax;
    private $iStepSize;
    
    public function FuncGenerator($aFunc, $aXFunc='')
    {
        $this->iFunc = $aFunc;
        $this->iXFunc = $aXFunc;
    }
    
    public 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
{
    public 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'),
    array('tm','2122'),   /* Trademark symbol */
    array('rtm','00AE')   /* Registered trademark */

);

        $n = count($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
{
    public $iMin=0;
    public $iMax=0;

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

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

    public 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;
    }
    }

    public 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;
    }
    }

    public 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;
        }
    }

    public 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);
    }

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

    public 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);
                    }
                }
            }
        }
    }

    public 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
    //----------------------------------------------------------------------------
    public 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;
    }
}