forked from GNUsocial/gnu-social
350 lines
9.0 KiB
PHP
350 lines
9.0 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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$this->blowFavesCache();
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parent::delete();
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}
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function saveTags() {
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/* extract all #hastags */
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$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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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($fave);
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}
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}
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static function getStream($qry, $cachekey, $offset=0, $limit=20) {
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if (common_config('memcached', 'enabled')) {
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return Notice::getCachedStream($qry, $cachekey, $offset, $limit);
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} else {
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return Notice::getStreamDirect($qry, $offset, $limit);
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}
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}
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static function getStreamDirect($qry, $offset, $limit) {
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$qry .= ' ORDER BY notice.created DESC, notice.id DESC ';
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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, $limit) {
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# If outside our cache window, just go to the DB
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if ($offset + $limit > NOTICE_CACHE_WINDOW) {
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return Notice::getStreamDirect($qry, $offset, $limit);
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}
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# Get the cache; if we can't, just go to the DB
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$cache = common_memcache();
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if (!$cache) {
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return Notice::getStreamDirect($qry, $offset, $limit);
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}
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# Get the notices out of the cache
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$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($qry, 0, NOTICE_CACHE_WINDOW);
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# If there are no hits, just return the value
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if (!$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, $before_id=0) {
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$needAnd = FALSE;
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$needWhere = TRUE;
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$qry = 'SELECT * FROM notice ';
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if (common_config('public', 'localonly')) {
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$qry .= ' WHERE is_local = 1 ';
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$needWhere = FALSE;
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$needAnd = TRUE;
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}
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// NOTE: since_id and before_id are extensions to Twitter API
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if ($since_id > 0) {
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if ($needWhere)
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$qry .= ' WHERE ';
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if ($needAnd)
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$qry .= ' AND ';
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$qry .= ' notice.id > ' . $since_id . ' ';
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$needAnd = FALSE;
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$needWhere = FALSE;
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}
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if ($before_id > 0) {
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if ($needWhere)
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$qry .= ' WHERE ';
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if ($needAnd)
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$qry .= ' AND ';
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$qry .= ' notice.id < ' . $before_id . ' ';
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$needAnd = FALSE;
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$needWhere = FALSE;
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}
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return Notice::getStream($qry,
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'public',
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$offset, $limit);
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}
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}
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