<?php

/* a sample of use:
 $thumbnails->printTable();
*/

/* an other sample:
 $thumbnails->thumbnailsDirectory = "small";
 $thumbnails->printString();
*/


// -----------------------------------------------
// print a debug string (hidden in the browser)
if (! function_exists("debug"))
{ 
  function debug($debugString)
  { print("<!--" . $debugString . "-->\n");
  }
}


function directoryBefore($a, $b)
{ if (is_dir($a) && is_dir($b))
  { return strcmp($a,$b);
  } else if (!is_dir($a) && !is_dir($b))
  { return strcmp($a,$b);
  }
  return !is_dir($a);

}


class Thumbnails
{
  // Default values - You can modify
  var $thumbnailsDirectory = "_thumbnails";
  var $numberOfColumns = 5;
  var $pathForDirectory = "/images/folder-open.png";
  var $tagForTD = "<td align=\"center\" valign=\"bottom\">";
  var $tagForTR = "<tr>";
  var $tagForTABLE = "<table>";
  var $hiddenFiles = array(".", "index.php", ".xvpics");

  // file-types icons - You can modify
  var $fileTypesIcons = array(
	"eps" => "/my_icons/document-icons/gnome/gnome-application-x-encapsuled_postscript.png",
	"pdf" => "/my_icons/document-icons/gnome/gnome-application-pdf.png",
	"ps" => "/my_icons/document-icons/gnome/gnome-application-postscript.png",
	"rtf" => "/my_icons/document-icons/gnome/gnome-application-rtf.png",
	"bz2" => "/my_icons/document-icons/gnome/gnome-application-x-bzip.png",
	"tar" => "/my_icons/document-icons/gnome/gnome-application-x-bzip.png",
	"gz" => "/my_icons/document-icons/gnome/gnome-application-x-bzip.png",
	"h" => "/my_icons/document-icons/gnome/gnome-application-x-c-header.png",
	"c" => "/my_icons/document-icons/gnome/gnome-application-x-c-source.png",
	"cc" => "/my_icons/document-icons/gnome/gnome-application-x-cc-source.png",
	"z" => "/my_icons/document-icons/gnome/gnome-application-x-compress.png",
	"gnum" => "/my_icons/document-icons/gnome/gnome-application-x-gnumeric.png",
	"gnumeric" => "/my_icons/document-icons/gnome/gnome-application-x-gnumeric.png",
	"java" => "/my_icons/document-icons/gnome/gnome-application-x-java-source.png",
	"php" => "/my_icons/document-icons/gnome/gnome-application-x-php.png",
	"mp3" => "/my_icons/document-icons/gnome/gnome-audio-mpeg.png",
	"bmp" => "/my_icons/document-icons/gnome/gnome-image-bmp.png",
	"gif" => "/my_icons/document-icons/gnome/gnome-image-gif.png",
	"jpg" => "/my_icons/document-icons/gnome/gnome-image-jpeg.png",
	"jpeg" => "/my_icons/document-icons/gnome/gnome-image-jpeg.png",
	"png" => "/my_icons/document-icons/gnome/gnome-image-png.png",

	"svg" => "/my_icons/document-icons/gnome/gnome-image-svg.png",
	"tga" => "/my_icons/document-icons/gnome/gnome-image-tga.png",
	"tif" => "/my_icons/document-icons/gnome/gnome-image-tiff.png",
	"tiff" => "/my_icons/document-icons/gnome/gnome-image-tiff.png",
	"xpm" => "/my_icons/document-icons/gnome/gnome-image-xpm.png",

	"deb" => "/my_icons/document-icons/gnome/gnome-pack-deb.png",
	"rpm" => "/my_icons/document-icons/gnome/gnome-pack-rpm.png",
	"tex" => "/my_icons/document-icons/gnome/gnome-tex.png",
	"htm" => "/my_icons/document-icons/gnome/gnome-text-html.png",
	"html" => "/my_icons/document-icons/gnome/gnome-text-html.png",
	"pl" => "/my_icons/document-icons/gnome/gnome-text-x-perl.png",
	"xml" => "/my_icons/document-icons/gnome/gnome-text-xml.png",
	"txt" => "/my_icons/document-icons/gnome/gnome-textfile.png",
	"mpg" => "/my_icons/document-icons/gnome/gnome-video-mpeg.png",
	"mpeg" => "/my_icons/document-icons/gnome/gnome-video-mpeg.png",
	"mov" => "/my_icons/document-icons/gnome/gnome-video-quicktime.png",
	"asf" => "/my_icons/document-icons/gnome/gnome-video-x-ms-asf.png",
	"avi" => "/my_icons/document-icons/gnome/gnome-video-x-msvideo.png",

	"" => "/my_icons/document-icons/gnome/gnome-file.png"
	);


  // instance variables - do NOT modify
  var $files;
  var $images;

  // -----------------------------------------------
  // Return the image to display for the reference
  function imageForReference($reference)
  {
    // for directory, display a special image.
    if (is_dir($reference))
    { return $this->pathForDirectory;
    }

    // extract the extension of the file (look at the last index of the character '.').
    $indexOfDot = strpos($reference,".");
    $extension = substr($reference,$indexOfDot+1,strlen($reference));
    $indexOfDot = strpos($extension,".");
    while ($indexOfDot != 0)
    { $extension = substr($extension,$indexOfDot+1,strlen($extension));
      $indexOfDot = strpos($extension,".");
    }

    switch($extension)
    { case "png":
      case "jpg":
      case "gif":
      case "jpeg": 
	// if the reference has a thumbnail, display it.
        if (in_array($reference, $this->images))
        { return ($this->thumbnailsDirectory . "/" . $reference);
        } else
        { $sizeOfImage = getimagesize($reference);
	// if the size of the image is not too wide, display it. Else, display the icon of the file-type.
	  if (($sizeOfImage[0] < 128) && ($sizeOfImage[1] < 128))
	  { return $reference;
	  } else
	  { return $this->fileTypesIcons[$extension];
	  }
        }
      default: 
	// for others files, display the icon of the file-type.
	if (in_array($extension,array_keys($this->fileTypesIcons)))
	{ return $this->fileTypesIcons[$extension];
	} else
	{ return $this->fileTypesIcons[""];
	}
    }

  }


  // -----------------------------------------------
  // print the link of the reference
  function linkForReference($reference)
  { 
    $link = "    ". 
      $this->tagForTD ."<a href=\"" . $reference . "\">" .
      "<img src=\"" . $this->imageForReference($reference) . "\"><br>".
      $reference . "</a></td>\n";
    return $link;
  }

  function printLink($reference)
  { 
    print($this->linkForReference($reference));
  }

  
  // -----------------------------------------------
  // retreive files of directory
  function getFilesOfCurrentDirectory()
  {
    $this->files = array();
    $myDirectory = opendir(".");
    while($entryName = readdir($myDirectory))
    {
      if(! in_array($entryName,$this->hiddenFiles))
      { $this->files[] = $entryName;
      }
    }
    closedir($myDirectory);
    sort($this->files);
    usort($this->files,"directoryBefore");
  }


  // -----------------------------------------------
  // retreive files of directory
  function getThumbnailsImages()
  {
    $this->images = array();
    if (! file_exists($this->thumbnailsDirectory))
    { return;
    }

    $myDirectory = opendir($this->thumbnailsDirectory);
    while($entryName = readdir($myDirectory))
    {
      if($entryName != ".")
      { $this->images[] = $entryName;
      }
    }
    closedir($myDirectory);
  }


  function thumbnailTable()
  {
    $this->hiddenFiles[] = $this->thumbnailsDirectory;
    $this->getFilesOfCurrentDirectory();
    $this->getThumbnailsImages();

    $currentColumnNumber = 1;
    $thumbnailTable = $this->tagForTABLE ."\n  ". $this->tagForTR ."\n";
    
    for ($index=0;$index<sizeof($this->files);$index++)
    { $fileName = $this->files[$index];

      $thumbnailTable =  $thumbnailTable . $this->linkForReference($fileName,$this->imageForReference($fileName));
      //      $this->printLink($fileName,$this->imageForReference($fileName));
    
      if ($currentColumnNumber == $this->numberOfColumns)
      { $currentColumnNumber = 1;
        $thumbnailTable = $thumbnailTable . "  </tr>\n  ". $this->tagForTR ."\n";
      } else
      { $currentColumnNumber = $currentColumnNumber + 1;
      }
    }

    if ($currentColumnNumber > 1)
    {
      for (;$currentColumnNumber <= $this->numberOfColumns;$currentColumnNumber++)
      { $thumbnailTable = $thumbnailTable . "    ". $this->tagForTD ."</td>\n";
      }
    }
    $thumbnailTable = $thumbnailTable . "  </tr>\n</table>\n";
    return $thumbnailTable;
  }

  function printTable()
  {
    print($this->thumbnailTable());
    /*
    $this->hiddenFiles[] = $this->thumbnailsDirectory;
    $this->getFilesOfCurrentDirectory();
    $this->getThumbnailsImages();

//    debug("Begin of thumbnails on " . $this->thumbnailsDirectory);

    $currentColumnNumber = 1;
    print($this->tagForTABLE ."\n  ". $this->tagForTR ."\n");
    
    for ($index=0;$index<sizeof($this->files);$index++)
    { $fileName = $this->files[$index];

      $this->printLink($fileName,$this->imageForReference($fileName));
    
      if ($currentColumnNumber == $this->numberOfColumns)
      { $currentColumnNumber = 1;
        print("  </tr>\n  ". $this->tagForTR ."\n");
      } else
      { $currentColumnNumber = $currentColumnNumber + 1;
      }
    }

    if ($currentColumnNumber > 1)
    {
      for (;$currentColumnNumber <= $this->numberOfColumns;$currentColumnNumber++)
      { print("    ". $this->tagForTD ."</td>\n");
      }
    }
    print("  </tr>\n</table>\n");

//    debug("End of thumbnails on " . $this->thumbnailsDirectory);
*/
  }
  
}
  

// Get a new instance
 $thumbnails = new Thumbnails;


?>