<?php

require_once 'Translator.php';

/**
 * represents a single image entry within a rdf file.
 *
 * @author Michael Lessnau
 * @version 0.1
 */
class RDFNodeImage {

   /**
    * @var $rdfAbout string contains the about attribute
    */
   private $rdfAbout;

   /**
    * @var $title string contains the title text element
    */
   private $title;

   /**
    * @var $url string contains the url text element
    */
   private $url;

   /**
    * @var $link string contains the link text element
    */
   private $link;
   
   /**
    * constructor
    */
   public function __construct( ) {
      $this->rdfAbout = '';
      $this->title = '';
      $this->url = '';
      $this->link = '';
   }
   
   /**
    * destructor
    */
   public function __destruct( ) {
      // nop
   }
   
   /**
    * setting the class' attributes
    *
    * @param $name string attribute name
    * @param $value mixed attribute value
    */
   public function __set( $name, $value) {
      switch( $name) {
         case 'rdfAbout':
            $this->rdfAbout = $value;
            break;
         case 'title':
            $this->title = $value;
            break;
         case 'url':
            $this->url = $value;
            break;
         case 'link':
            $this->link = $value;
            break;
      }
   }
   
   /**
    * access the class' attributes
    *
    * @param $name string attribute name
    * @return string attribute value
    */
   public function __get( $name) {
      switch( $name) {
         case 'rdfAbout':
            return $this->rdfAbout;
         case 'title':
            return $this->title;
         case 'url':
            return $this->url;
         case 'link':
            return $this->link;
      }
      return false;
   }
   
   /**
    * serialize the image data.
    *
    * @param $indent string indentation
    * @return string serialized image data
    */
   public function toString( $indent) {
      $output  = $indent . '<image rdf:about="' . Translator::encode( $this->rdfAbout) . '">' . "\n";
      $output .= $indent . '  <title>' . Translator::encode( $this->title) . '</title>' . "\n";
      $output .= $indent . '  <url>' . Translator::encode( $this->url) . '</url>' . "\n";
      $output .= $indent . '  <link>' . Translator::encode( $this->link) . '</link>' . "\n";
      $output .= $indent . '</image>' . "\n";
      return $output;
   }   
};

?>