<?php
include_once("thumbnail.php");

class Photo {
  public $file;
  public $text;

  function Photo($file, $text) {
    $this->file = $file;
    $this->text = $text;
  }
}

class Album {
	// Album directory (and identifier)
  public $album;

	// Photo array
  public $photos;

	// Album data
  public $title;
  public $icon;
  public $copyright;
	
	public function add($photo) {
		// First added image is automatically made album icon.
		if($this->icon == "") $this->icon = $photo->file;

		$key = $photo->file;
		$this->photos[$key] = $photo;
	}
	
	public function write()
	{
		$fp = fopen($this->file, "w");
		fwrite($fp, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");

		fwrite($fp, "<album title=\"". $this->title . "\" icon=\"".$this->icon."\" copyright=\"" . $this->copyright . "\">\n");
		foreach($this->photos as $photo) {
			fwrite($fp, "  <photo file=\"" . $photo->file . "\"\n");
			fwrite($fp, "         text=\"" . $photo->text . "\">\n");
			fwrite($fp, "  </photo>\n");
		}
		fwrite($fp, "</album>\n");

		fclose($fp);
	}
	
	private function read()
	{

		$dom = new DomDocument;
		$dom->preserveWhiteSpace = FALSE;
		$dom->load($this->file);

		$params = $dom->getElementsByTagName('album');
		foreach ($params as $param) {
			$this->title = $param->getAttribute('title');
			$this->icon = $param->getAttribute('icon');
			$this->copyright = $param->getAttribute('copyright');
		}

		$params = $dom->getElementsByTagName('photo');
		foreach ($params as $param) {
			$photo = new Photo($param->getAttribute('file'), $param->getAttribute('text'));
			$this->add($photo);
		}

		// Key sort
		if(sizeof($this->photos) > 0) ksort($this->photos);
	}

	public function Album($album)
	{
		global $ALBUMS_DIR;
		$this->album = $album;
		$this->file =  $ALBUMS_DIR ."/". $album . "/album.xml";
		$this->read();
	}

}


function getAllAlbums()
{
	global $ALBUMS_DIR;
	$albums = array();

	$handle = opendir($ALBUMS_DIR . "/");
	$albumdirs = array();
	while($albumdir = readdir($handle)) {
		array_push($albumdirs, $albumdir);
	}

	rsort($albumdirs);

	foreach($albumdirs as $albumdir) {
		if(!strstr($albumdir, ".") && !strstr($albumdir, "..")) {
			$album = new Album($albumdir);
			array_push($albums, $album);
		}
	}

	return $albums;
}

function getRandomPhoto()
{
	$album;
	$photo;

	$albums = getAllAlbums();

	$numalbums = sizeof($albums);
	$ralbum = rand(0, sizeof($albums)-1);
	foreach($albums as $a) {
		$album = $a;
		$ralbum--;
		if(!$ralbum) break;
	}

	$numphotos = sizeof($album->photos);
	$rphoto = rand(0, $numphotos-1);
	if($album->photos) {
		foreach($album->photos as $p) {
			$photo = $p;
			$rphoto--;
			if(!$rphoto) break;
		}
	}
	
	//	echo "<p>".$numalbums . " " .$ralbum . " ".$numphotos . " ".$rphoto . "</p>";

	return array($album, $photo);
}


?>