Refactoring

- object model
- code is smaller, more readable.
- cache implemented
- README updated.
- Bridges added: Twitter, Google Search.

rss-bridge-googlesearch.php

@@ -0,0 +1,41 @@
+<?php
+require_once('rss-bridge-lib.php');
+
+/**
+ * RssBridgeGoogleMostRecent
+ * Search Google for most recent pages regarding a specific topic.
+ * Returns the 100 most recent links in results in past year,
+ * sorting by date (most recent first).
+ * Example:
+ * http://www.google.com/search?q=sebsauvage&num=100&complete=0&tbs=qdr:y,sbd:1
+ *    complete=0&num=100 : get 100 results
+ *    qdr:y : in past year
+ *    sbd:1 : sort by date (will only work if qdr: is specified)
+ */
+ 
+class RssBridgeGoogleSearch extends RssBridgeAbstractClass
+{
+    protected $bridgeName = 'Google search';
+    protected $bridgeURI = 'http://google.com';
+    protected $bridgeDescription = 'Returns most recent results from Google search.';
+    protected $cacheDuration = 30; // 30 minutes, otherwise you could get banned by Google, or stumblr upon their captcha.
+    protected function collectData($request) {
+        $html = '';
+        if (isset($request['q'])) {   /* keyword search mode */
+            $html = file_get_html('http://www.google.com/search?q='.urlencode($request['q']).'&num=100&complete=0&tbs=qdr:y,sbd:1') or $this->returnError('404 Not Found', 'ERROR: no results for this query.');
+        } else {
+            $this->returnError('400 Bad Request', 'ERROR: You must specify a keyword (?q=...).');
+        }
+        $this->items = Array();
+        foreach($html->find('div[id=ires]',0)->find('li[class=g]') as $element) {
+            $item['uri'] = $element->find('a[href]',0)->href;
+            $item['title'] = $element->find('h3',0)->plaintext;
+            $item['content'] = $element->find('span[class=st]',0)->plaintext;
+            $this->items[] = $item;
+        }
+    }
+} 
+
+$bridge = new RssBridgeGoogleSearch();
+$bridge->process();
+?>