540 lines
14 KiB
PHP
540 lines
14 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(true);
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$this->blowFavesCache(true);
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$this->blowInboxes();
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return 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, $uri=NULL) {
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$profile = Profile::staticGet($profile_id);
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if (!$profile) {
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common_log(LOG_ERR, 'Problem saving notice. Unknown user.');
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return _('Problem saving notice. Unknown user.');
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}
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if (common_config('throttle', 'enabled') && !Notice::checkEditThrottle($profile_id)) {
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common_log(LOG_WARNING, 'Excessive posting by profile #' . $profile_id . '; throttled.');
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return _('Too many notices too fast; take a breather and post again in a few minutes.');
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}
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$banned = common_config('profile', 'banned');
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if ( in_array($profile_id, $banned) || in_array($profile->nickname, $banned)) {
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common_log(LOG_WARNING, "Attempted post from banned user: $profile->nickname (user id = $profile_id).");
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return _('You are banned from posting notices on this site.');
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}
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$notice = new Notice();
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$notice->profile_id = $profile_id;
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$blacklist = common_config('public', 'blacklist');
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# Blacklisted are non-false, but not 1, either
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if ($blacklist && in_array($profile_id, $blacklist)) {
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$notice->is_local = -1;
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} else {
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$notice->is_local = $is_local;
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}
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$notice->reply_to = $reply_to;
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$notice->created = common_sql_now();
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$notice->content = common_shorten_links($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 $notice;
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}
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static function checkEditThrottle($profile_id) {
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$profile = Profile::staticGet($profile_id);
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if (!$profile) {
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return false;
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}
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# Get the Nth notice
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$notice = $profile->getNotices(common_config('throttle', 'count') - 1, 1);
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if ($notice && $notice->fetch()) {
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# If the Nth notice was posted less than timespan seconds ago
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if (time() - strtotime($notice->created) <= common_config('throttle', 'timespan')) {
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# Then we throttle
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return false;
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}
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}
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# Either not N notices in the stream, OR the Nth was not posted within timespan seconds
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return true;
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}
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function blowCaches($blowLast=false) {
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$this->blowSubsCache($blowLast);
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$this->blowNoticeCache($blowLast);
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$this->blowRepliesCache($blowLast);
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$this->blowPublicCache($blowLast);
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$this->blowTagCache($blowLast);
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}
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function blowTagCache($blowLast=false) {
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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:' . $tag->tag));
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if ($blowLast) {
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$cache->delete(common_cache_key('notice_tag:notice_stream:' . $tag->tag . ';last'));
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}
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}
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}
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$tag->free();
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unset($tag);
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}
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}
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function blowSubsCache($blowLast=false) {
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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:' . $user->id));
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if ($blowLast) {
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$cache->delete(common_cache_key('user:notices_with_friends:' . $user->id . ';last'));
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}
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}
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$user->free();
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unset($user);
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}
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}
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function blowNoticeCache($blowLast=false) {
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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('profile:notices:'.$this->profile_id));
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if ($blowLast) {
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$cache->delete(common_cache_key('profile:notices:'.$this->profile_id.';last'));
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}
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}
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}
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}
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function blowRepliesCache($blowLast=false) {
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$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:'.$reply->profile_id));
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if ($blowLast) {
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$cache->delete(common_cache_key('user:replies:'.$reply->profile_id.';last'));
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}
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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($blowLast=false) {
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if ($this->is_local == 1) {
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$cache = common_memcache();
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if ($cache) {
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$cache->delete(common_cache_key('public'));
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if ($blowLast) {
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$cache->delete(common_cache_key('public').';last');
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}
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}
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}
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}
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function blowFavesCache($blowLast=false) {
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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:'.$fave->user_id));
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if ($blowLast) {
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$cache->delete(common_cache_key('user:faves:'.$fave->user_id.';last'));
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}
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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, $since=NULL) {
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if (common_config('memcached', 'enabled')) {
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# Skip the cache if this is a since, since_id or before_id qry
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if ($since_id > 0 || $before_id > 0 || $since) {
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return Notice::getStreamDirect($qry, $offset, $limit, $since_id, $before_id, $order, $since);
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} else {
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return Notice::getCachedStream($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, $since);
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}
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static function getStreamDirect($qry, $offset, $limit, $since_id, $before_id, $order, $since) {
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$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 < ' . $before_id;
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}
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if ($since) {
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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.created > \'' . date('Y-m-d H:i:s', $since) . '\'';
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}
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# Allow ORDER override
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if ($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 $notice;
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}
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# XXX: this is pretty long and should probably be broken up into
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# some helper functions
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static function getCachedStream($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 $wrapper;
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}
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# If the cache was invalidated because of new data being
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# added, we can try and just get the new stuff. We keep an additional
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# copy of the data at the key + ';last'
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# No cache hit. Try to get the *last* cached version
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$last_notices = $cache->get(common_cache_key($cachekey) . ';last');
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if ($last_notices) {
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# Reverse-chron order, so last ID is last.
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$last_id = $last_notices[0]->id;
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# XXX: this assumes monotonically increasing IDs; a fair
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# bet with our DB.
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$new_notice = Notice::getStreamDirect($qry, 0, NOTICE_CACHE_WINDOW,
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$last_id, NULL, $order);
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if ($new_notice) {
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$new_notices = array();
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while ($new_notice->fetch()) {
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$new_notices[] = clone($new_notice);
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}
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$new_notice->free();
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$notices = array_slice(array_merge($new_notices, $last_notices),
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0, NOTICE_CACHE_WINDOW);
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# Store the array in the cache for next time
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$result = $cache->set(common_cache_key($cachekey), $notices);
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$result = $cache->set(common_cache_key($cachekey) . ';last', $notices);
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# return a wrapper of the array for use now
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return new NoticeWrapper(array_slice($notices, $offset, $limit));
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}
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}
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# Otherwise, get the full cache window out of the DB
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$notice = Notice::getStreamDirect($qry, 0, NOTICE_CACHE_WINDOW, NULL, NULL, $order, NULL);
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# If there are no hits, just return the value
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if (!$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($notice);
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}
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$notice->free();
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# Store the array in the cache for next time
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$result = $cache->set(common_cache_key($cachekey), $notices);
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$result = $cache->set(common_cache_key($cachekey) . ';last', $notices);
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# return a wrapper of the array for use now
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$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, $since=NULL) {
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$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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} else {
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# -1 == blacklisted
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$parts[] = 'is_local != -1';
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}
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if ($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, NULL, $since);
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}
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function addToInboxes() {
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$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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'AND NOT EXISTS (SELECT user_id, notice_id ' .
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'FROM notice_inbox ' .
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'WHERE user_id = user.id ' .
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'AND notice_id = ' . $this->id . ' )';
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if ($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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}
|
|
|
|
return;
|
|
}
|
|
|
|
}
|
|
|