superclass for noticelistitems that strip rel=nofollow when nofollow|external=sometimes

diff --git a/lib/dofollowlistitem.php b/lib/dofollowlistitem.php
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+++ b/lib/dofollowlistitem.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * widget for displaying a list of notices
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  UI
+ * @package   StatusNet
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
+ * @link      http://status.net/
+ */
+
+if (!defined('STATUSNET')) {
+    exit(1);
+}
+
+require_once INSTALLDIR.'/lib/noticelist.php';
+
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * Widget superclass for notice list items that remove rel=nofollow
+ *
+ * When nofollow|external = 'sometimes', notices get rendered and saved
+ * with rel=nofollow for external links. We want to remove that relationship
+ * on some pages (profile, single notice, faves). This superclass for
+ * some noticelistitems will strip that bit of code out when showing
+ * notice content
+ *
+ * @category  UI
+ * @package   StatusNet
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
+ * @link      http://status.net/
+ */
+
+class DoFollowListItem extends NoticeListItem
+{
+    /**
+     * show the content of the notice
+     *
+     * Trims out the rel=nofollow for external links
+     * if nofollow|external = 'sometimes'
+     *
+     * @return void
+     */
+
+    function showContent()
+    {
+        // FIXME: URL, image, video, audio
+        $this->out->elementStart('p', array('class' => 'entry-content'));
+
+        if (!empty($this->notice->rendered)) {
+            $html = $this->notice->rendered;
+        } else {
+            $html = common_render_content($this->notice->content, $this->notice);
+        }
+
+        if (common_config('nofollow', 'external') == 'sometimes') {
+            // remove the nofollow part
+            // XXX: cache the results here
+
+            $html = preg_replace('/rel="(.*)nofollow ?/', 'rel="\1', $html);
+        }
+
+        $this->out->raw($html);
+
+        $this->out->elementEnd('p');
+    }
+}
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