367 lines
11 KiB
PHP
367 lines
11 KiB
PHP
<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2010 StatusNet, 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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/**
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* Class for activity streams
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*
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* Includes objects like notices, subscriptions and from plugins.
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*
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* We extend atomusernoticefeed since it does some nice setup for us.
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*
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*/
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class UserActivityStream extends AtomUserNoticeFeed
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{
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public $activities = array();
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public $after = null;
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const OUTPUT_STRING = 1;
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const OUTPUT_RAW = 2;
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public $outputMode = self::OUTPUT_STRING;
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/**
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*
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* @param User $user
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* @param boolean $indent
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* @param boolean $outputMode: UserActivityStream::OUTPUT_STRING to return a string,
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* or UserActivityStream::OUTPUT_RAW to go to raw output.
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* Raw output mode will attempt to stream, keeping less
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* data in memory but will leave $this->activities incomplete.
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*/
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function __construct($user, $indent = true, $outputMode = UserActivityStream::OUTPUT_STRING, $after = null)
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{
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parent::__construct($user, null, $indent);
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$this->outputMode = $outputMode;
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if ($this->outputMode == self::OUTPUT_STRING) {
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// String buffering? Grab all the notices now.
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$notices = $this->getNotices();
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} elseif ($this->outputMode == self::OUTPUT_RAW) {
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// Raw output... need to restructure from the stringer init.
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$this->xw = new XMLWriter();
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$this->xw->openURI('php://output');
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if(is_null($indent)) {
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$indent = common_config('site', 'indent');
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}
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$this->xw->setIndent($indent);
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// We'll fetch notices later.
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$notices = array();
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} else {
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throw new Exception('Invalid outputMode provided to ' . __METHOD__);
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}
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$this->after = $after;
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// Assume that everything but notices is feasible
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// to pull at once and work with in memory...
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$subscriptions = $this->getSubscriptions();
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$subscribers = $this->getSubscribers();
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$groups = $this->getGroups();
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$objs = array_merge($subscriptions, $subscribers, $groups, $notices);
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Event::handle('AppendUserActivityStreamObjects', array($this, &$objs));
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$subscriptions = null;
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$subscribers = null;
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$groups = null;
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unset($subscriptions);
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unset($subscribers);
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unset($groups);
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// Sort by create date
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usort($objs, 'UserActivityStream::compareObject');
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// We'll keep these around for later, and interleave them into
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// the output stream with the user's notices.
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$this->objs = $objs;
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}
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/**
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* Interleave the pre-sorted objects with the user's
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* notices, all in reverse chron order.
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*/
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function renderEntries($format=Feed::ATOM, $handle=null)
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{
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$haveOne = false;
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$end = time() + 1;
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foreach ($this->objs as $obj) {
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try {
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$act = $obj->asActivity();
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} catch (Exception $e) {
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common_log(LOG_ERR, $e->getMessage());
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continue;
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}
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$start = $act->time;
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if ($this->outputMode == self::OUTPUT_RAW && $start != $end) {
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// In raw mode, we haven't pre-fetched notices.
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// Grab the chunks of notices between other activities.
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try {
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$notices = $this->getNoticesBetween($start, $end);
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foreach ($notices as $noticeAct) {
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try {
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$nact = $noticeAct->asActivity($this->user->getProfile());
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if ($format == Feed::ATOM) {
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$nact->outputTo($this, false, false);
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} else {
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if ($haveOne) {
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fwrite($handle, ",");
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}
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fwrite($handle, json_encode($nact->asArray()));
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$haveOne = true;
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}
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} catch (Exception $e) {
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common_log(LOG_ERR, $e->getMessage());
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continue;
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}
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$nact = null;
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unset($nact);
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}
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} catch (Exception $e) {
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common_log(LOG_ERR, $e->getMessage());
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}
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}
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$notices = null;
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unset($notices);
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try {
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if ($format == Feed::ATOM) {
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// Only show the author sub-element if it's different from default user
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$act->outputTo($this, false, ($act->actor->id != $this->user->getUri()));
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} else {
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if ($haveOne) {
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fwrite($handle, ",");
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}
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fwrite($handle, json_encode($act->asArray()));
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$haveOne = true;
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}
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} catch (Exception $e) {
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common_log(LOG_ERR, $e->getMessage());
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}
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$act = null;
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unset($act);
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$end = $start;
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}
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if ($this->outputMode == self::OUTPUT_RAW) {
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// Grab anything after the last pre-sorted activity.
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try {
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if (!empty($this->after)) {
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$notices = $this->getNoticesBetween($this->after, $end);
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} else {
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$notices = $this->getNoticesBetween(0, $end);
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}
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foreach ($notices as $noticeAct) {
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try {
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$nact = $noticeAct->asActivity($this->user);
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if ($format == Feed::ATOM) {
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$nact->outputTo($this, false, false);
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} else {
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if ($haveOne) {
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fwrite($handle, ",");
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}
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fwrite($handle, json_encode($nact->asArray()));
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$haveOne = true;
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}
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} catch (Exception $e) {
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common_log(LOG_ERR, $e->getMessage());
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continue;
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}
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}
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} catch (Exception $e) {
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common_log(LOG_ERR, $e->getMessage());
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}
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}
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if (empty($this->after) || strtotime($this->user->created) > $this->after) {
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// We always add the registration activity at the end, even if
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// they have older activities (from restored backups) in their stream.
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try {
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$ract = $this->user->registrationActivity();
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if ($format == Feed::ATOM) {
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$ract->outputTo($this, false, false);
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} else {
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if ($haveOne) {
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fwrite($handle, ",");
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}
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fwrite($handle, json_encode($ract->asArray()));
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$haveOne = true;
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}
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} catch (Exception $e) {
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common_log(LOG_ERR, $e->getMessage());
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continue;
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}
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}
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}
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function compareObject($a, $b)
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{
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$ac = strtotime((empty($a->created)) ? $a->modified : $a->created);
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$bc = strtotime((empty($b->created)) ? $b->modified : $b->created);
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return (($ac == $bc) ? 0 : (($ac < $bc) ? 1 : -1));
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}
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function getSubscriptions()
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{
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$subs = array();
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$sub = new Subscription();
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$sub->subscriber = $this->user->id;
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if (!empty($this->after)) {
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$sub->whereAdd("created > '" . common_sql_date($this->after) . "'");
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}
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if ($sub->find()) {
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while ($sub->fetch()) {
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if ($sub->subscribed != $this->user->id) {
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$subs[] = clone($sub);
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}
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}
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}
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return $subs;
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}
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function getSubscribers()
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{
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$subs = array();
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$sub = new Subscription();
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$sub->subscribed = $this->user->id;
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if (!empty($this->after)) {
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$sub->whereAdd("created > '" . common_sql_date($this->after) . "'");
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}
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if ($sub->find()) {
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while ($sub->fetch()) {
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if ($sub->subscriber != $this->user->id) {
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$subs[] = clone($sub);
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}
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}
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}
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return $subs;
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}
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/**
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*
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* @param int $start unix timestamp for earliest
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* @param int $end unix timestamp for latest
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* @return array of Notice objects
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*/
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function getNoticesBetween($start=0, $end=0)
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{
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$notices = array();
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$notice = new Notice();
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$notice->profile_id = $this->user->id;
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// Only stuff after $this->after
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if (!empty($this->after)) {
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if ($start) {
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$start = max($start, $this->after);
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}
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if ($end) {
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$end = max($end, $this->after);
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}
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}
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if ($start) {
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$tsstart = common_sql_date($start);
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$notice->whereAdd("created >= '$tsstart'");
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}
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if ($end) {
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$tsend = common_sql_date($end);
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$notice->whereAdd("created < '$tsend'");
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}
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$notice->orderBy('created DESC');
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if ($notice->find()) {
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while ($notice->fetch()) {
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$notices[] = clone($notice);
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}
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}
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return $notices;
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}
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function getNotices()
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{
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if (!empty($this->after)) {
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return $this->getNoticesBetween($this->after);
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} else {
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return $this->getNoticesBetween();
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}
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}
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function getGroups()
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{
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$groups = array();
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$gm = new Group_member();
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$gm->profile_id = $this->user->id;
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if (!empty($this->after)) {
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$gm->whereAdd("created > '" . common_sql_date($this->after) . "'");
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}
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if ($gm->find()) {
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while ($gm->fetch()) {
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$groups[] = clone($gm);
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}
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}
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return $groups;
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}
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function createdAfter($item) {
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$created = strtotime((empty($item->created)) ? $item->modified : $item->created);
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return ($created >= $this->after);
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}
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function writeJSON($handle)
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{
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require_once INSTALLDIR.'/lib/activitystreamjsondocument.php';
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fwrite($handle, '{"items": [');
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$this->renderEntries(Feed::JSON, $handle);
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fwrite($handle, ']}');
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}
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}
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