add gocomics article filter plugin

plugins/gocomics/gocomics.php

@@ -0,0 +1,58 @@
+<?php
+class GoComics extends Plugin {
+
+	private $link;
+	private $host;
+
+	function about() {
+		return array(1.0,
+			"Strip unnecessary stuff from gocomics feeds",
+			"fox");
+	}
+
+	function init($host) {
+		$this->link = $host->get_link();
+		$this->host = $host;
+
+		$host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
+	}
+
+	function hook_article_filter($article) {
+		$owner_uid = $article["owner_uid"];
+
+		if (strpos($article["guid"], "gocomics.com") !== FALSE && strpos($article["guid"], "gocomics,$owner_uid:") === FALSE) {
+			$doc = new DOMDocument();
+			@$doc->loadHTML(fetch_file_contents($article["link"]));
+
+			$basenode = false;
+
+			if ($doc) {
+				$xpath = new DOMXPath($doc);
+				$entries = $xpath->query('(//img[@src])'); // we might also check for img[@class='strip'] I guess...
+
+				$matches = array();
+
+				foreach ($entries as $entry) {
+
+					if (preg_match("/(http:\/\/assets.amuniversal.com\/.*)/i", $entry->getAttribute("src"), $matches)) {
+
+						$entry->setAttribute("src", $matches[0]);
+						$basenode = $entry;
+						break;
+					}
+				}
+
+				if ($basenode) {
+					$article["content"] = $doc->saveXML($basenode, LIBXML_NOEMPTYTAG);
+
+					// we need to update guid with owner_uid because our local article is different from the one
+					// other users with this plugin disabled might get
+					$article["guid"] = "gocomics,$owner_uid:" . $article["guid"];
+				}
+			}
+		}
+
+		return $article;
+	}
+}
+?>