Add NasaApod bridge (fix #17)

bridges/NasaApodBridge.php

@@ -0,0 +1,56 @@
+<?php
+/**
+* 2014-08-27
+* @name NASA APOD Bridge
+* @homepage http://apod.nasa.gov/apod/astropix.html
+* @description Returns the 3 latest NASA APOD pictures and explanations
+* @maintainer corenting
+*/
+class NasaApodBridge extends BridgeAbstract{
+
+  public function collectData(array $param) {
+
+    $html = file_get_html('http://apod.nasa.gov/apod/archivepix.html') or $this->returnError('Error while downloading the website content', 404);
+    $list = explode("<br>", $html->find('b', 0)->innertext);
+
+    for($i = 0; $i < 3;$i++)
+    {
+      $line = $list[$i];
+      $item = new \Item();
+
+      $uri_page = $html->find('a',$i + 3)->href;
+      $uri = 'http://apod.nasa.gov/apod/'.$uri_page;
+      $item->uri = $uri;
+
+      $picture_html = file_get_html($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 getName(){
+    return 'NASA APOD';
+  }
+
+  public function getURI(){
+    return 'http://apod.nasa.gov/apod/astropix.html';
+  }
+
+  public function getCacheDuration(){
+    return 3600*12; // 12 hours
+  }
+}