From ff766572e7f4940d66137f7dd0d8f09df1fbaf1c Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@controlyourself.ca>
Date: Sun, 7 Dec 2008 19:55:22 -0500
Subject: [PATCH] trac750 Remove foreign link when Facebook user removes our
 app

darcs-hash:20081208005522-7b5ce-84325ed13fd5e59ac07640089806a507c7168170.gz
---
 actions/facebookremove.php | 65 ++++++++++++++++++++++++++++++++++++++
 htaccess.sample            |  1 +
 2 files changed, 66 insertions(+)
 create mode 100644 actions/facebookremove.php

diff --git a/actions/facebookremove.php b/actions/facebookremove.php
new file mode 100644
index 0000000000..2a7bdd03e0
--- /dev/null
+++ b/actions/facebookremove.php
@@ -0,0 +1,65 @@
+<?php
+/*
+ * Laconica - a distributed open-source microblogging tool
+ * Copyright (C) 2008, Controlez-Vous, 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/>.
+ */
+
+if (!defined('LACONICA')) { exit(1); }
+
+require_once(INSTALLDIR.'/lib/facebookaction.php');
+
+class FacebookremoveAction extends FacebookAction {
+
+	function handle($args) {
+		parent::handle($args);
+
+		$secret = common_config('facebook', 'secret');
+
+		$sig = '';
+
+		ksort($_POST);
+
+		foreach ($_POST as $key => $val) {
+			if (substr($key, 0, 7) == 'fb_sig_') {
+				$sig .= substr($key, 7) . '=' . $val;
+			}
+		 }
+
+		$sig .= $secret;
+		$verify = md5($sig);
+
+		if ($verify == $this->arg('fb_sig')) {
+
+			$flink = Foreign_link::getByForeignID($this->arg('fb_sig_user'), 2);
+
+			common_debug("Removing foreign link to Facebook - local user ID: $flink->user_id, Facebook ID: $flink->foreign_id");
+
+			$result = $flink->delete();
+
+			if (!$result) {
+				common_log_db_error($flink, 'DELETE', __FILE__);
+				common_server_error(_('Couldn\'t remove Facebook user.'));
+				return;
+			}
+
+		} else {
+			# Someone bad tried to remove facebook link?
+			common_log(LOG_ERR, "Someone from $_SERVER[REMOTE_ADDR] " .
+				'unsuccessfully tried to remove a foreign link to Facebook!');
+		}
+	}
+
+}
diff --git a/htaccess.sample b/htaccess.sample
index b15ab664fc..bd29d318f5 100644
--- a/htaccess.sample
+++ b/htaccess.sample
@@ -26,6 +26,7 @@ RewriteRule ^facebook/$ index.php?action=facebookhome [L,QSA]
 RewriteRule ^facebook/index.php$ index.php?action=facebookhome [L,QSA]
 RewriteRule ^facebook/settings.php$ index.php?action=facebooksettings [L,QSA]
 RewriteRule ^facebook/invite.php$ index.php?action=facebookinvite [L,QSA]
+RewriteRule ^facebook/remove$ index.php?action=facebookremove [L,QSA]
 
 RewriteRule ^main/login$ index.php?action=login [L,QSA]
 RewriteRule ^main/logout$ index.php?action=logout [L,QSA]
-- 
2.39.2