diff options
Diffstat (limited to 'plugins/SubscriptionThrottlePlugin.php')
| -rw-r--r-- | plugins/SubscriptionThrottlePlugin.php | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/plugins/SubscriptionThrottlePlugin.php b/plugins/SubscriptionThrottlePlugin.php new file mode 100644 index 000000000..114113360 --- /dev/null +++ b/plugins/SubscriptionThrottlePlugin.php @@ -0,0 +1,175 @@ +<?php +/** + * StatusNet - the distributed open-source microblogging tool + * Copyright (C) 2010, StatusNet, Inc. + * + * Plugin to throttle subscriptions by a user + * + * PHP version 5 + * + * 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 Throttle + * @package StatusNet + * @author Evan Prodromou <evan@status.net> + * @copyright 2010 StatusNet, Inc. + * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0 + * @link http://status.net/ + */ + +if (!defined('STATUSNET')) { + // This check helps protect against security problems; + // your code file can't be executed directly from the web. + exit(1); +} + +/** + * Subscription throttle + * + * @category Throttle + * @package StatusNet + * @author Evan Prodromou <evan@status.net> + * @copyright 2010 StatusNet, Inc. + * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0 + * @link http://status.net/ + */ + +class SubscriptionThrottlePlugin extends Plugin +{ + public $subLimits = array(86400 => 100, + 3600 => 50); + + public $groupLimits = array(86400 => 50, + 3600 => 25); + + /** + * Filter subscriptions to see if they're coming too fast. + * + * @param User $user The user subscribing + * @param User $other The user being subscribed to + * + * @return boolean hook value + */ + + function onStartSubscribe($user, $other) + { + foreach ($this->subLimits as $seconds => $limit) { + $sub = $this->_getNthSub($user, $limit); + + if (!empty($sub)) { + $subtime = strtotime($sub->created); + $now = time(); + if ($now - $subtime < $seconds) { + throw new Exception(_("Too many subscriptions. Take a break and try again later.")); + } + } + } + + return true; + } + + /** + * Filter group joins to see if they're coming too fast. + * + * @param Group $group The group being joined + * @param User $user The user joining + * + * @return boolean hook value + */ + + function onStartJoinGroup($group, $user) + { + foreach ($this->groupLimits as $seconds => $limit) { + $mem = $this->_getNthMem($user, $limit); + if (!empty($mem)) { + + $jointime = strtotime($mem->created); + $now = time(); + if ($now - $jointime < $seconds) { + throw new Exception(_("Too many memberships. Take a break and try again later.")); + } + } + } + + return true; + } + + /** + * Get the Nth most recent subscription for this user + * + * @param User $user The user to get subscriptions for + * @param integer $n How far to count back + * + * @return Subscription a subscription or null + */ + + private function _getNthSub($user, $n) + { + $sub = new Subscription(); + + $sub->subscriber = $user->id; + $sub->orderBy('created DESC'); + $sub->limit($n - 1, 1); + + if ($sub->find(true)) { + return $sub; + } else { + return null; + } + } + + /** + * Get the Nth most recent group membership for this user + * + * @param User $user The user to get memberships for + * @param integer $n How far to count back + * + * @return Group_member a membership or null + */ + + private function _getNthMem($user, $n) + { + $mem = new Group_member(); + + $mem->profile_id = $user->id; + $mem->orderBy('created DESC'); + $mem->limit($n - 1, 1); + + if ($mem->find(true)) { + return $mem; + } else { + return null; + } + } + + /** + * Return plugin version data for display + * + * @param array &$versions Array of version arrays + * + * @return boolean hook value + */ + + function onPluginVersion(&$versions) + { + $versions[] = array('name' => 'SubscriptionThrottle', + 'version' => STATUSNET_VERSION, + 'author' => 'Evan Prodromou', + 'homepage' => 'http://status.net/wiki/Plugin:SubscriptionThrottle', + 'rawdescription' => + _m('Configurable limits for subscriptions and group memberships.')); + return true; + } +} + |