<?php
 /*
     pBarcode39 - class to create barcodes (39B)

     Version     : 2.1.3
     Made by     : Jean-Damien POGOLOTTI
     Last Update : 09/09/11

     This file can be distributed under the license you can find at :

                       http://www.pchart.net/license

     You can find the whole class documentation on the pChart web site.
 */

 /* pData class definition */
 class pBarcode39
  {
   var $Codes;
   var $Reverse;
   var $Result;
   var $pChartObject;
   var $CRC;
   var $MOD43;

   /* Class creator */
   function pBarcode39($BasePath="",$EnableMOD43=FALSE)
    {
     $this->MOD43  = $EnableMOD43;
     $this->Codes   = "";
     $this->Reverse = "";

     $FileHandle = @fopen($BasePath."data/39.db", "r");

     if (!$FileHandle) { die("Cannot find barcode database (".$BasePath."data/39.db)."); }

     while (!feof($FileHandle))
      {
       $Buffer = fgets($FileHandle,4096);
       $Buffer = str_replace(chr(10),"",$Buffer);
       $Buffer = str_replace(chr(13),"",$Buffer);
       $Values = preg_split("/;/",$Buffer);

       $this->Codes[$Values[0]] = $Values[1];
      }
     fclose($FileHandle);
    }

   /* Return the projected size of a barcode */
   function getSize($TextString,$Format="")
    {
     $Angle		= isset($Format["Angle"]) ? $Format["Angle"] : 0;
     $ShowLegend	= isset($Format["ShowLegend"]) ? $Format["ShowLegend"] : FALSE;
     $LegendOffset	= isset($Format["LegendOffset"]) ? $Format["LegendOffset"] : 5;
     $DrawArea		= isset($Format["DrawArea"]) ? $Format["DrawArea"] : FALSE;
     $FontSize		= isset($Format["FontSize"]) ? $Format["FontSize"] : 12;
     $Height		= isset($Format["Height"]) ? $Format["Height"] : 30;

     $TextString    = $this->encode39($TextString);
     $BarcodeLength = strlen($this->Result);

     if ( $DrawArea )   { $WOffset = 20; } else { $WOffset = 0; }
     if ( $ShowLegend ) { $HOffset = $FontSize+$LegendOffset+$WOffset; } else { $HOffset = 0; }

     $X1 = cos($Angle * PI / 180) * ($WOffset+$BarcodeLength);
     $Y1 = sin($Angle * PI / 180) * ($WOffset+$BarcodeLength);

     $X2 = $X1 + cos(($Angle+90) * PI / 180) * ($HOffset+$Height);
     $Y2 = $Y1 + sin(($Angle+90) * PI / 180) * ($HOffset+$Height);


     $AreaWidth  = max(abs($X1),abs($X2));
     $AreaHeight = max(abs($Y1),abs($Y2));

     return(array("Width"=>$AreaWidth,"Height"=>$AreaHeight));
    }

   /* Create the encoded string */
   function encode39($Value)
    {
     $this->Result = "100101101101"."0";
     $TextString   = "";
     for($i=1;$i<=strlen($Value);$i++)
      {
       $CharCode = ord($this->mid($Value,$i,1));
       if ( $CharCode >= 97 && $CharCode <= 122 ) { $CharCode = $CharCode - 32; }

       if ( isset($this->Codes[chr($CharCode)]) )
        {
         $this->Result = $this->Result.$this->Codes[chr($CharCode)]."0";
         $TextString = $TextString.chr($CharCode);
        }
      }

     if ( $this->MOD43 )
      {
       $Checksum = $this->checksum($TextString);
       $this->Result = $this->Result.$this->Codes[$Checksum]."0";
      }

     $this->Result = $this->Result."100101101101";
     $TextString   = "*".$TextString."*";

     return($TextString);
    }

   /* Create the encoded string */
   function draw($Object,$Value,$X,$Y,$Format="")
    {
     $this->pChartObject = $Object;

     $R			= isset($Format["R"]) ? $Format["R"] : 0;
     $G			= isset($Format["G"]) ? $Format["G"] : 0;
     $B			= isset($Format["B"]) ? $Format["B"] : 0;
     $Alpha		= isset($Format["Alpha"]) ? $Format["Alpha"] : 100;
     $Height		= isset($Format["Height"]) ? $Format["Height"] : 30;
     $Angle		= isset($Format["Angle"]) ? $Format["Angle"] : 0;
     $ShowLegend	= isset($Format["ShowLegend"]) ? $Format["ShowLegend"] : FALSE;
     $LegendOffset	= isset($Format["LegendOffset"]) ? $Format["LegendOffset"] : 5;
     $DrawArea		= isset($Format["DrawArea"]) ? $Format["DrawArea"] : FALSE;
     $AreaR		= isset($Format["AreaR"]) ? $Format["AreaR"] : 255;
     $AreaG		= isset($Format["AreaG"]) ? $Format["AreaG"] : 255;
     $AreaB		= isset($Format["AreaB"]) ? $Format["AreaB"] : 255;
     $AreaBorderR	= isset($Format["AreaBorderR"]) ? $Format["AreaBorderR"] : $AreaR;
     $AreaBorderG	= isset($Format["AreaBorderG"]) ? $Format["AreaBorderG"] : $AreaG;
     $AreaBorderB	= isset($Format["AreaBorderB"]) ? $Format["AreaBorderB"] : $AreaB;

     $TextString   = $this->encode39($Value);

     if ( $DrawArea )
      {
       $X1 = $X + cos(($Angle-135) * PI / 180) * 10;
       $Y1 = $Y + sin(($Angle-135) * PI / 180) * 10;

       $X2 = $X1 + cos($Angle * PI / 180) * (strlen($this->Result)+20);
       $Y2 = $Y1 + sin($Angle * PI / 180) * (strlen($this->Result)+20);

       if ( $ShowLegend )
        {
         $X3 = $X2 + cos(($Angle+90) * PI / 180) * ($Height+$LegendOffset+$this->pChartObject->FontSize+10);
         $Y3 = $Y2 + sin(($Angle+90) * PI / 180) * ($Height+$LegendOffset+$this->pChartObject->FontSize+10);
        }
       else
        {
         $X3 = $X2 + cos(($Angle+90) * PI / 180) * ($Height+20);
         $Y3 = $Y2 + sin(($Angle+90) * PI / 180) * ($Height+20);
        }

       $X4 = $X3 + cos(($Angle+180) * PI / 180) * (strlen($this->Result)+20);
       $Y4 = $Y3 + sin(($Angle+180) * PI / 180) * (strlen($this->Result)+20);

       $Polygon  = array($X1,$Y1,$X2,$Y2,$X3,$Y3,$X4,$Y4);
       $Settings = array("R"=>$AreaR,"G"=>$AreaG,"B"=>$AreaB,"BorderR"=>$AreaBorderR,"BorderG"=>$AreaBorderG,"BorderB"=>$AreaBorderB);
       $this->pChartObject->drawPolygon($Polygon,$Settings);
      }

     for($i=1;$i<=strlen($this->Result);$i++)
      {
       if ( $this->mid($this->Result,$i,1) == 1 )
        {
         $X1 = $X + cos($Angle * PI / 180) * $i;
         $Y1 = $Y + sin($Angle * PI / 180) * $i;
         $X2 = $X1 + cos(($Angle+90) * PI / 180) * $Height;
         $Y2 = $Y1 + sin(($Angle+90) * PI / 180) * $Height;

         $Settings = array("R"=>$R,"G"=>$G,"B"=>$B,"Alpha"=>$Alpha);
         $this->pChartObject->drawLine($X1,$Y1,$X2,$Y2,$Settings);
        }
      }

     if ( $ShowLegend )
      {
       $X1 = $X + cos($Angle * PI / 180) * (strlen($this->Result)/2);
       $Y1 = $Y + sin($Angle * PI / 180) * (strlen($this->Result)/2);

       $LegendX = $X1 + cos(($Angle+90) * PI / 180) * ($Height+$LegendOffset);
       $LegendY = $Y1 + sin(($Angle+90) * PI / 180) * ($Height+$LegendOffset);

       $Settings = array("R"=>$R,"G"=>$G,"B"=>$B,"Alpha"=>$Alpha,"Angle"=>-$Angle,"Align"=>TEXT_ALIGN_TOPMIDDLE);
       $this->pChartObject->drawText($LegendX,$LegendY,$TextString,$Settings);
      }
    }

   function checksum( $string )
    {
     $checksum = 0;
     $length   = strlen( $string );
     $charset  = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%';

     for( $i=0; $i < $length; ++$i )
      $checksum += strpos( $charset, $string[$i] );
 
     return substr( $charset, ($checksum % 43), 1 );
    }

   function left($value,$NbChar) { return substr($value,0,$NbChar); }  
   function right($value,$NbChar) { return substr($value,strlen($value)-$NbChar,$NbChar); }  
   function mid($value,$Depart,$NbChar) { return substr($value,$Depart-1,$NbChar); }  
  }
?>