forked from GNUsocial/gnu-social
35407614bb
On identi.ca, certain users (http://identi.ca/derricklo) publish 5-10 automated notices every half hour or hour. This can flood the public stream, making it unreadable for casual readers. We don't want to prevent anyone from using the site for personal use. However, if their personal use clouds up the public space, we can gently remove them from that public space without interfering with their personal activity. So: this change prevents selected people's notices from appearing in the public stream. It's hand-configured by an administrator, and probably doesn't scale beyond 10-20 blacklisted users. It's a stopgap measure. darcs-hash:20081120183722-84dde-8a8401fbcbb6abb60a8b36de249323586ea0b22c.gz
415 lines
10 KiB
PHP
415 lines
10 KiB
PHP
<?php
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/*
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* Laconica - a distributed open-source microblogging tool
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* Copyright (C) 2008, Controlez-Vous, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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if (!defined('LACONICA')) { exit(1); }
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/**
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* Table Definition for notice
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*/
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require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
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/* We keep the first three 20-notice pages, plus one for pagination check,
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* in the memcached cache. */
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define('NOTICE_CACHE_WINDOW', 61);
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class Notice extends Memcached_DataObject
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{
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###START_AUTOCODE
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/* the code below is auto generated do not remove the above tag */
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public $__table = 'notice'; // table name
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public $id; // int(4) primary_key not_null
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public $profile_id; // int(4) not_null
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public $uri; // varchar(255) unique_key
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public $content; // varchar(140)
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public $rendered; // text()
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public $url; // varchar(255)
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public $created; // datetime() not_null
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public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
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public $reply_to; // int(4)
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public $is_local; // tinyint(1)
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public $source; // varchar(32)
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/* Static get */
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function staticGet($k,$v=NULL) { return Memcached_DataObject::staticGet('Notice',$k,$v); }
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/* the code above is auto generated do not remove the tag below */
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###END_AUTOCODE
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function getProfile() {
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return Profile::staticGet('id', $this->profile_id);
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}
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function delete() {
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$this->blowCaches();
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$this->blowFavesCache();
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$this->blowInboxes();
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parent::delete();
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}
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function saveTags() {
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/* extract all #hastags */
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$count = preg_match_all('/(?:^|\s)#([A-Za-z0-9_\-\.]{1,64})/', strtolower($this->content), $match);
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if (!$count) {
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return true;
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}
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/* elide characters we don't want in the tag */
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$match[1] = str_replace(array('-', '_', '.'), '', $match[1]);
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/* Add them to the database */
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foreach(array_unique($match[1]) as $hashtag) {
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$tag = DB_DataObject::factory('Notice_tag');
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$tag->notice_id = $this->id;
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$tag->tag = $hashtag;
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$tag->created = $this->created;
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$id = $tag->insert();
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if (!$id) {
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$last_error = PEAR::getStaticProperty('DB_DataObject','lastError');
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common_log(LOG_ERR, 'DB error inserting hashtag: ' . $last_error->message);
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common_server_error(sprintf(_('DB error inserting hashtag: %s'), $last_error->message));
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return;
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}
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}
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return true;
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}
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static function saveNew($profile_id, $content, $source=NULL, $is_local=1, $reply_to=NULL, $uri=NULL) {
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$notice = new Notice();
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$notice->profile_id = $profile_id;
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$notice->is_local = $is_local;
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$notice->reply_to = $reply_to;
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$notice->created = common_sql_now();
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$notice->content = $content;
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$notice->rendered = common_render_content($notice->content, $notice);
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$notice->source = $source;
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$notice->uri = $uri;
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$id = $notice->insert();
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if (!$id) {
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common_log_db_error($notice, 'INSERT', __FILE__);
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return _('Problem saving notice.');
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}
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# Update the URI after the notice is in the database
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if (!$uri) {
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$orig = clone($notice);
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$notice->uri = common_notice_uri($notice);
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if (!$notice->update($orig)) {
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common_log_db_error($notice, 'UPDATE', __FILE__);
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return _('Problem saving notice.');
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}
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}
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# XXX: do we need to change this for remote users?
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common_save_replies($notice);
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$notice->saveTags();
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# Clear the cache for subscribed users, so they'll update at next request
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# XXX: someone clever could prepend instead of clearing the cache
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if (common_config('memcached', 'enabled')) {
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$notice->blowCaches();
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}
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$notice->addToInboxes();
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return $notice;
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}
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function blowCaches() {
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$this->blowSubsCache();
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$this->blowNoticeCache();
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$this->blowRepliesCache();
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$this->blowPublicCache();
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$this->blowTagCache();
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}
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function blowTagCache() {
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$cache = common_memcache();
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if ($cache) {
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$tag = new Notice_tag();
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$tag->notice_id = $this->id;
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if ($tag->find()) {
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while ($tag->fetch()) {
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$cache->delete(common_cache_key('notice_tag:notice_stream:' . $tag->tag));
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}
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}
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$tag->free();
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unset($tag);
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}
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}
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function blowSubsCache() {
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$cache = common_memcache();
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if ($cache) {
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$user = new User();
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$user->query('SELECT id ' .
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'FROM user JOIN subscription ON user.id = subscription.subscriber ' .
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'WHERE subscription.subscribed = ' . $this->profile_id);
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while ($user->fetch()) {
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$cache->delete(common_cache_key('user:notices_with_friends:' . $user->id));
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}
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$user->free();
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unset($user);
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}
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}
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function blowNoticeCache() {
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if ($this->is_local) {
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$cache = common_memcache();
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if ($cache) {
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$cache->delete(common_cache_key('user:notices:'.$this->profile_id));
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}
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}
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}
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function blowRepliesCache() {
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$cache = common_memcache();
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if ($cache) {
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$reply = new Reply();
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$reply->notice_id = $this->id;
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if ($reply->find()) {
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while ($reply->fetch()) {
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$cache->delete(common_cache_key('user:replies:'.$reply->profile_id));
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}
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}
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$reply->free();
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unset($reply);
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}
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}
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function blowPublicCache() {
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if ($this->is_local) {
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$cache = common_memcache();
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if ($cache) {
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$cache->delete(common_cache_key('public'));
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}
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}
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}
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function blowFavesCache() {
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$cache = common_memcache();
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if ($cache) {
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$fave = new Fave();
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$fave->notice_id = $this->id;
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if ($fave->find()) {
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while ($fave->fetch()) {
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$cache->delete(common_cache_key('user:faves:'.$fave->user_id));
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}
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}
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$fave->free();
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unset($fave);
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}
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}
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# XXX: too many args; we need to move to named params or even a separate
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# class for notice streams
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static function getStream($qry, $cachekey, $offset=0, $limit=20, $since_id=0, $before_id=0, $order=NULL) {
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if (common_config('memcached', 'enabled')) {
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# Skip the cache if this is a since_id or before_id qry
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if ($since_id > 0 || $before_id > 0) {
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return Notice::getStreamDirect($qry, $offset, $limit, $since_id, $before_id, $order);
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} else {
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return Notice::getCachedStream($qry, $cachekey, $offset, $limit, $order);
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}
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}
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return Notice::getStreamDirect($qry, $offset, $limit, $since_id, $before_id, $order);
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}
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static function getStreamDirect($qry, $offset, $limit, $since_id, $before_id, $order) {
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$needAnd = FALSE;
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$needWhere = TRUE;
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if (preg_match('/\bWHERE\b/i', $qry)) {
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$needWhere = FALSE;
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$needAnd = TRUE;
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}
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if ($since_id > 0) {
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if ($needWhere) {
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$qry .= ' WHERE ';
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$needWhere = FALSE;
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} else {
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$qry .= ' AND ';
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}
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$qry .= ' notice.id > ' . $since_id;
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}
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if ($before_id > 0) {
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if ($needWhere) {
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$qry .= ' WHERE ';
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$needWhere = FALSE;
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} else {
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$qry .= ' AND ';
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}
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$qry .= ' notice.id < ' . $before_id;
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}
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# Allow ORDER override
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if ($order) {
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$qry .= $order;
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} else {
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$qry .= ' ORDER BY notice.created DESC, notice.id DESC ';
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}
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if (common_config('db','type') == 'pgsql') {
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$qry .= ' LIMIT ' . $limit . ' OFFSET ' . $offset;
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} else {
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$qry .= ' LIMIT ' . $offset . ', ' . $limit;
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}
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$notice = new Notice();
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$notice->query($qry);
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return $notice;
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}
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static function getCachedStream($qry, $cachekey, $offset, $limit, $order) {
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# If outside our cache window, just go to the DB
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if ($offset + $limit > NOTICE_CACHE_WINDOW) {
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return Notice::getStreamDirect($qry, $offset, $limit, NULL, NULL, $order);
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}
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# Get the cache; if we can't, just go to the DB
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$cache = common_memcache();
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if (!$cache) {
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return Notice::getStreamDirect($qry, $offset, $limit, NULL, NULL, $order);
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}
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# Get the notices out of the cache
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$notices = $cache->get(common_cache_key($cachekey));
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# On a cache hit, return a DB-object-like wrapper
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if ($notices !== FALSE) {
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$wrapper = new NoticeWrapper(array_slice($notices, $offset, $limit));
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return $wrapper;
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}
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# Otherwise, get the full cache window out of the DB
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$notice = Notice::getStreamDirect($qry, 0, NOTICE_CACHE_WINDOW, NULL, NULL, $order);
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# If there are no hits, just return the value
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if (!$notice) {
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return $notice;
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}
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# Pack results into an array
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$notices = array();
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while ($notice->fetch()) {
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$notices[] = clone($notice);
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}
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# Store the array in the cache for next time
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$result = $cache->set(common_cache_key($cachekey), $notices);
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# return a wrapper of the array for use now
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$wrapper = new NoticeWrapper(array_slice($notices, $offset, $limit));
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return $wrapper;
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}
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function publicStream($offset=0, $limit=20, $since_id=0, $before_id=0) {
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$parts = array();
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$qry = 'SELECT * FROM notice ';
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if (common_config('public', 'localonly')) {
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$parts[] = 'is_local = 1';
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}
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if (common_config('public', 'blacklist')) {
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$parts[] = 'profile_id not in (' . implode(',', common_config('public', 'blacklist')) . ')';
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}
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if ($parts) {
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$qry .= ' WHERE ' . implode(' AND ', $parts);
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}
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return Notice::getStream($qry,
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'public',
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$offset, $limit, $since_id, $before_id);
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}
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function addToInboxes() {
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$enabled = common_config('inboxes', 'enabled');
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if ($enabled === true || $enabled === 'transitional') {
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$inbox = new Notice_inbox();
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$qry = 'INSERT INTO notice_inbox (user_id, notice_id, created) ' .
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'SELECT user.id, ' . $this->id . ', "' . $this->created . '" ' .
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'FROM user JOIN subscription ON user.id = subscription.subscriber ' .
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'WHERE subscription.subscribed = ' . $this->profile_id;
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if ($enabled === 'transitional') {
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$qry .= ' AND user.inboxed = 1';
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}
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$inbox->query($qry);
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}
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return;
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}
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# Delete from inboxes if we're deleted.
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function blowInboxes() {
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$enabled = common_config('inboxes', 'enabled');
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if ($enabled === true || $enabled === 'transitional') {
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$inbox = new Notice_inbox();
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$inbox->notice_id = $this->id;
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$inbox->delete();
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}
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return;
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}
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}
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