<?php
function cpResample($path, $newpath, $newWidth, $newHeight)
{
  global $lang;

  $filename = basename($path);
  $dirname = dirname($path);
  $newdir = dirname($newpath);
  
  // extension of the picture filename
  $extension = get_extension($filename);

  // create image from file
  if ($extension == 'jpg' or $extension == 'JPG')
  {
    $srcImage = @imagecreatefromjpeg($path);
  }
  else if ($extension == 'png' or $extension == 'PNG')
  {
    $srcImage = @imagecreatefrompng($path);
  }
  else
  {
    unset($extension);
  }

  if ( isset( $srcImage ) )
  {
    // width/height
    $srcWidth    = imagesx( $srcImage ); 
    $srcHeight   = imagesy( $srcImage ); 
    $ratioWidth  = $srcWidth/$newWidth;
    $ratioHeight = $srcHeight/$newHeight;

    // maximal size exceeded ?
    if ( ( $ratioWidth > 1 ) or ( $ratioHeight > 1 ) )
    {
      if ( $ratioWidth < $ratioHeight)
      { 
        $destWidth = $srcWidth/$ratioHeight;
        $destHeight = $newHeight; 
      }
      else
      { 
        $destWidth = $newWidth; 
        $destHeight = $srcHeight/$ratioWidth;
      }
    }
    else
    {
      $destWidth = $srcWidth;
      $destHeight = $srcHeight;
    }
      // GD 2.0 or more recent -> good results (but slower)
      $destImage = imagecreatetruecolor( $destWidth, $destHeight); 
      imagecopyresampled( $destImage, $srcImage, 0, 0, 0, 0,
                          $destWidth,$destHeight,$srcWidth,$srcHeight );
    // creation and backup of final picture
    if (!is_writable($newdir))
    {
      array_push($page['errors'], '['.$newdir.'] : '.$lang['no_write_access']);
      return false;
    }
    imagejpeg($destImage, $newpath);
    // freeing memory ressources
    imagedestroy( $srcImage );
    imagedestroy( $destImage );
    
    list($img_width, $img_height) = getimagesize($newpath);
    $img_size = floor(filesize($newpath) / 1024).' KB';
    
    $info = array( 'path'      => $path,
                   'big_file'   => $newpath,
                   'img_width'  => $img_width,
                   'img_height' => $img_height,
                   'img_size'   => $img_size );
    return $info;
  }
  // error
  else
  {
  // TODO : error messages
    exit();
  }
}
?>

function validate_upload( $temp_name, $my_max_file_size,
                          $image_max_width, $image_max_height )
{
  global $conf, $lang;
    
  $result = array();
  $result['error'] = array();
  $extension = get_extension( $_FILES['picture']['name'] );
  if (!in_array($extension, $conf['picture_ext']))
  {
    array_push( $result['error'], $lang['upload_advise_filetype'] );
    return $result;
  }
  if ( !isset( $_FILES['picture'] ) )
  {
    // do we even have a file?
    array_push( $result['error'], "You did not upload anything!" );
  }
  else if ( $_FILES['picture']['size'] > $my_max_file_size * 1024 )
  {
    array_push( $result['error'],
                $lang['upload_advise_filesize'].$my_max_file_size.' KB' );
  }
  else
  {
    // check if we are allowed to upload this file_type
    // upload de la photo sous un nom temporaire
    if ( !move_uploaded_file( $_FILES['picture']['tmp_name'], $temp_name ) )
    {
      array_push( $result['error'], $lang['upload_cannot_upload'] );
    }
    else
    {
      $size = getimagesize( $temp_name );
// chrisaga start
      $high_path = dirname($temp_name).'/pwg_high/'.basename($temp_name);
      if ( ( isset( $image_max_width ) and isset( $image_max_height ) )
           and ( ( $image_max_width != ""
                   and $size[0] > $image_max_width )
                 or ( $image_max_height != ""
                      and $size[1] > $image_max_height ) ) )
      {
         // copy img to pwg_high and make a smaller image
         @copy( $temp_name, $high_path) ;
         cpResample($high_path, $temp_name, $image_max_width, $image_max_height);
      }
      else
      {
// chrisaga end
        if ( isset( $image_max_width )
             and $image_max_width != ""
             and $size[0] > $image_max_width )
        {
          array_push( $result['error'],
                      $lang['upload_advise_width'].$image_max_width.' px' );
        }
        if ( isset( $image_max_height )
             and $image_max_height != ""
             and $size[1] > $image_max_height )
        {
          array_push( $result['error'],
                      $lang['upload_advise_height'].$image_max_height.' px' );
        }
// chrisaga start
      }
// chrisaga end
      // $size[2] == 1 means GIF
      // $size[2] == 2 means JPG
      // $size[2] == 3 means PNG
      switch ( $size[2] )
      {
      case 1 : $result['type'] = 'gif'; break;
      case 2 : $result['type'] = 'jpg'; break;
      case 3 : $result['type'] = 'png'; break;
      default :
        array_push( $result['error'], $lang['upload_advise_filetype'] );  
      }
    }
  }
  if ( sizeof( $result['error'] ) > 0 )
  {
    // destruction de l'image avec le nom temporaire
    @unlink( $temp_name );
  }
  else
  {
    @chmod( $temp_name, 0644);
  }
  return $result;
}