<?php


class XmlC
{
  var $xml_data;
  var $obj_data;
  var $pointer;

  function XmlC()
  {
  }

  function Set_xml_data( &$xml_data )
  {
    $this->index = 0;
    $this->pointer[] = &$this->obj_data;

    $this->xml_data = $xml_data;
    $this->xml_parser = xml_parser_create( "UTF-8" );

    xml_parser_set_option( $this->xml_parser, XML_OPTION_CASE_FOLDING, false );
    xml_set_object( $this->xml_parser, &$this );
    xml_set_element_handler( $this->xml_parser, "_startElement", "_endElement");
    xml_set_character_data_handler( $this->xml_parser, "_cData" );

    xml_parse( $this->xml_parser, $this->xml_data, true );
    xml_parser_free( $this->xml_parser );
  }

  function _startElement( $parser, $tag, $attributeList )
  {
    foreach( $attributeList as $name => $value )
    {
      $value = $this->_cleanString( $value );
      $object->$name = $value;
    }
    eval( "\$this->pointer[\$this->index]->" . $tag . "[] = \$object;" );
    eval( "\$size = sizeof( \$this->pointer[\$this->index]->" . $tag . " );" );
    eval( "\$this->pointer[] = &\$this->pointer[\$this->index]->" . $tag . "[\$size-1];" );
   
    $this->index++;
  }

  function _endElement( $parser, $tag )
  {
    array_pop( $this->pointer );
    $this->index--;
  }

  function _cData( $parser, $data )
  {
    if( trim( $data ) )
    {
      $this->pointer[$this->index] = trim( $data );
    }
  }

  function _cleanString( $string )
  {
    return utf8_decode( trim( $string ) );
  }

}

$filename = "poll.xml";
$xmlC = new XmlC();
$xml_data = file_get_contents( $filename );

$xmlC->Set_XML_data( $xml_data );

//print_r( $xmlC->obj_data );
//print "Blah blah <p><p> blah";

//array pollcontent
$pollcontent=( $xmlC->obj_data->poll);

//print_r ($pollcontent[0]->topic);

$categories=$pollcontent[0]->category;
$data=$pollcontent[0]->data;
//print_r($categories);
$img=imagecreate(320,220);

$white = imagecolorallocate($img, 255, 255, 255);
$black = imagecolorallocate($img,0,0,0);
   
// draw a white circle 
//imagearc($img, 100, 100, 150, 150, 0, 360, $black);

imagerectangle($img,105,05,315,215,$black);


imagestring($img,2,0,0,"Poll:",$black);
imagestring($img,2,0,20,$pollcontent[0]->topic,$black);
$tmpy=30;

// then we put the various categories down, bearing in mind that the first one starts at y=50 pixels

foreach( $categories as $name => $value )
    {
	imagestring($img,2,0,20+$tmpy,$value->name,$black);
	$tmpy+=20;
    }

// Now we need to extract the results from somewhere.
$filename=$data[0]->filename;

//imagestring($img,2,0,20+$tmpy,$filename,$black);

//$myrawresults=fopen($filename,"r");


$fcontents = file($filename);

//..$rawresults=array();

// for every pair of lines in the file


// just want frequency ratings of each thing
// only concentrating on votes for the moment I think
$resultcategories=array();
$resultcategories[0]=array();
$resultcategories[1]=array(0,1,2,3,4,5,6,7,8,9);
$resultvotes=array();

for ($foo=0; $foo<10; $foo++){
	$resultvotes[$foo]=0;
}

$runningmaxvalue=0;


foreach ($fcontents as $index=>$value){
	$tmparray=explode("=",$value);
	if (strstr($tmparray[0],"vote")){
		//imagestring($img,2,0,20+$tmpy,$tmparray[1],$black);
		//echo $tmparray[0];
		//echo $tmparray[1];
		$tmparray[1]=chop($tmparray[1]);
		
		//echo "Resultvotes ***$tmparray[1]***";
		$resultvotes[$tmparray[1]]=$resultvotes[$tmparray[1]]+1;
		if($resultvotes[$tmparray[1]]>$runningmaxvalue){
			$runningmaxvalue=$resultvotes[$tmparray[1]];
		}
	}
}


/// now print out the votes...
$initialy=53;
foreach ( $resultvotes as $name => $value ){
	// coordinates should be... starting at fifty, and adding 20 each time.
	if($value>0){ 
	$resultantx=108+$value/$runningmaxvalue*200;
	imagefilledrectangle($img,108,$initialy,$resultantx,$initialy+5,$black);
	}
	$initialy+=20;

}

imagestring($img,2,270,200,"max:$runningmaxvalue",$black);

//fclose($myrawresults);


// output image in the browser
header("Content-type: image/png");
imagepng($img);
   
// free memory
imagedestroy($img);

?>