--- /dev/null
+<?php
+/*
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * 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/>.
+ */
+
+/**
+ * @package ShareNoticePlugin
+ * @maintainer Brion Vibber <brion@status.net>
+ */
+
+if (!defined('STATUSNET')) { exit(1); }
+
+class ShareNoticePlugin extends Plugin
+{
+ public $targets = array(
+ array('Twitter'),
+ array('Facebook'),
+ array('StatusNet', array('baseurl' => 'http://identi.ca'))
+ );
+
+ function onEndShowStatusNetStyles($action) {
+ $action->cssLink('plugins/ShareNotice/css/sharenotice.css');
+ return true;
+ }
+
+ function onStartShowNoticeItem($item)
+ {
+ $notice = $item->notice;
+ $out = $item->out;
+
+ $out->elementStart('ul', array('class' => 'notice-share'));
+ foreach ($this->targets as $data) {
+ $type = $data[0];
+ $args = (count($data) > 1) ? $data[1] : array();
+ $target = $this->getShareTarget($type, $notice, $args);
+ $this->showShareTarget($out, $target);
+ }
+ $out->elementEnd('ul');
+ }
+
+ private function getShareTarget($type, $notice, $args)
+ {
+ $class = ucfirst($type) . 'ShareTarget';
+
+ return new $class($notice, $args);
+ }
+
+ private function showShareTarget(HTMLOutputter $out, NoticeShareTarget $target)
+ {
+ $class = $target->getClass();
+ $text = $target->getText();
+ $url = $target->targetUrl();
+
+ $out->elementStart('li', array('class' => 'notice-share-' . $class));
+ $out->elementStart('a', array(
+ 'href' => $url,
+ 'title' => $text,
+ 'target' => '_blank'
+ ));
+ $out->element('span', array(), $text);
+ $out->elementEnd('a');
+ $out->elementEnd('li');
+ }
+}
+
+abstract class NoticeShareTarget
+{
+ protected $notice;
+
+ public function __construct($notice)
+ {
+ $this->notice = $notice;
+ }
+
+ public abstract function getClass();
+
+ public abstract function getText();
+
+ public abstract function targetUrl();
+}
+
+abstract class GenericNoticeShareTarget extends NoticeShareTarget
+{
+ protected function maxLength()
+ {
+ return 140; // typical
+ }
+
+ protected function statusText()
+ {
+ $pattern = _m('"%s"');
+ $url = $this->notice->bestUrl();
+ $suffix = ' ' . $url;
+ $room = $this->maxLength() - mb_strlen($suffix) - (mb_strlen($pattern) - mb_strlen('%s'));
+
+ $content = $this->notice->content;
+ if (mb_strlen($content) > $room) {
+ $content = mb_substr($content, 0, $room - 1) . '…';
+ }
+
+ return sprintf($pattern, $content) . $suffix;
+ }
+}
+
+class TwitterShareTarget extends GenericNoticeShareTarget
+{
+ public function getClass()
+ {
+ return 'twitter';
+ }
+
+ public function getText()
+ {
+ return _m('Share on Twitter');
+ }
+
+ public function targetUrl()
+ {
+ $args = array(
+ 'status' => $this->statusText()
+ );
+ return 'http://twitter.com/home?' .
+ http_build_query($args, null, '&');
+ }
+}
+
+class StatusNetShareTarget extends GenericNoticeShareTarget
+{
+ protected $baseurl;
+
+ public function __construct($notice, $args)
+ {
+ parent::__construct($notice);
+ $this->baseurl = $args['baseurl'];
+ }
+
+ public function getClass()
+ {
+ return 'statusnet';
+ }
+
+ public function getText()
+ {
+ $host = parse_url($this->baseurl, PHP_URL_HOST);
+ return sprintf(_m('Share on %s'), $host);
+ }
+
+ public function targetUrl()
+ {
+ $args = array(
+ 'status_textarea' => $this->statusText()
+ );
+ return $this->baseurl . '/notice/new?' .
+ http_build_query($args, null, '&');
+ }
+
+}
+
+class FacebookShareTarget extends NoticeShareTarget
+{
+ public function getClass()
+ {
+ return 'facebook';
+ }
+
+ public function getText()
+ {
+ return _m('Share on Facebook');
+ }
+
+ public function targetUrl()
+ {
+ $args = array(
+ 'u' => $this->notice->bestUrl(),
+ 't' => sprintf(_m('"%s"'), $this->notice->content),
+ );
+ return 'http://www.facebook.com/sharer.php?' .
+ http_build_query($args, null, '&');
+ }
+}
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