rss-bridge/bridges/NasaApodBridge.php

<?php
class NasaApodBridge extends BridgeAbstract{

	public function loadMetadatas() {

		$this->maintainer = "corenting";
		$this->name = "NASA APOD Bridge";
		$this->uri = "http://apod.nasa.gov/apod/astropix.html";
		$this->description = "Returns the 3 latest NASA APOD pictures and explanations";

	}

  public function collectData(array $param) {

    $html = $this->getSimpleHTMLDOM('http://apod.nasa.gov/apod/archivepix.html') or $this->returnServerError('Error while downloading the website content');
    $list = explode("<br>", $html->find('b', 0)->innertext);

    for($i = 0; $i < 3;$i++)
    {
      $line = $list[$i];
      $item = array();

      $uri_page = $html->find('a',$i + 3)->href;
      $uri = 'http://apod.nasa.gov/apod/'.$uri_page;
      $item['uri'] = $uri;

      $picture_html = $this->getSimpleHTMLDOM($uri);
      $picture_html_string = $picture_html->innertext;

      //Extract image and explanation
      $media = $picture_html->find('p',1)->innertext;
      $media = strstr($media, '<br>');
      $media = preg_replace('/<br>/', '', $media, 1);
      $explanation = $picture_html->find('p',2)->innertext;

      //Extract date from the picture page
      $date = explode(" ", $picture_html->find('p',1)->innertext);
      $item['timestamp'] = strtotime($date[4].$date[3].$date[2]);

      //Other informations
      $item['content'] = $media.'<br />'.$explanation;
      $item['title'] = $picture_html->find('b',0)->innertext;
      $this->items[] = $item;
    }
  }

  public function getCacheDuration(){
    return 3600*12; // 12 hours
  }
}