forked from GNUsocial/gnu-social
357 lines
12 KiB
PHP
357 lines
12 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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* class to import activities as part of a user's timeline
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*
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* PHP version 5
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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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* @category Cache
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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if (!defined('STATUSNET')) {
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// This check helps protect against security problems;
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// your code file can't be executed directly from the web.
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exit(1);
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}
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/**
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* Class comment
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*
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* @category General
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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class ActivityImporter extends QueueHandler
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{
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private $trusted = false;
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/**
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* Function comment
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*
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* @param
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*
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* @return
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*/
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function handle($data)
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{
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list($user, $author, $activity, $trusted) = $data;
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$this->trusted = $trusted;
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$done = null;
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try {
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if (Event::handle('StartImportActivity',
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array($user, $author, $activity, $trusted, &$done))) {
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switch ($activity->verb) {
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case ActivityVerb::FOLLOW:
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$this->subscribeProfile($user, $author, $activity);
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break;
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case ActivityVerb::JOIN:
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$this->joinGroup($user, $activity);
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break;
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case ActivityVerb::POST:
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$this->postNote($user, $author, $activity);
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break;
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default:
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// TRANS: Client exception thrown when using an unknown verb for the activity importer.
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throw new ClientException(sprintf(_("Unknown verb: \"%s\"."),$activity->verb));
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}
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Event::handle('EndImportActivity',
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array($user, $author, $activity, $trusted));
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$done = true;
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}
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} catch (Exception $e) {
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common_log(LOG_ERR, $e->getMessage());
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$done = true;
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}
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return $done;
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}
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function subscribeProfile($user, $author, $activity)
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{
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$profile = $user->getProfile();
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if ($activity->objects[0]->id == $author->id) {
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if (!$this->trusted) {
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// TRANS: Client exception thrown when trying to force a subscription for an untrusted user.
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throw new ClientException(_('Cannot force subscription for untrusted user.'));
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}
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$other = $activity->actor;
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$otherUser = User::staticGet('uri', $other->id);
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if (!empty($otherUser)) {
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$otherProfile = $otherUser->getProfile();
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} else {
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// TRANS: Client exception thrown when trying to force a remote user to subscribe.
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throw new Exception(_('Cannot force remote user to subscribe.'));
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}
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// XXX: don't do this for untrusted input!
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Subscription::start($otherProfile, $profile);
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} else if (empty($activity->actor)
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|| $activity->actor->id == $author->id) {
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$other = $activity->objects[0];
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$otherProfile = Profile::fromUri($other->id);
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if (empty($otherProfile)) {
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// TRANS: Client exception thrown when trying to subscribe to an unknown profile.
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throw new ClientException(_('Unknown profile.'));
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}
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Subscription::start($profile, $otherProfile);
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} else {
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// TRANS: Client exception thrown when trying to import an event not related to the importing user.
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throw new Exception(_('This activity seems unrelated to our user.'));
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}
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}
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function joinGroup($user, $activity)
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{
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// XXX: check that actor == subject
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$uri = $activity->objects[0]->id;
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$group = User_group::staticGet('uri', $uri);
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if (empty($group)) {
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$oprofile = Ostatus_profile::ensureActivityObjectProfile($activity->objects[0]);
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if (!$oprofile->isGroup()) {
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// TRANS: Client exception thrown when trying to join a remote group that is not a group.
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throw new ClientException(_('Remote profile is not a group!'));
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}
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$group = $oprofile->localGroup();
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}
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assert(!empty($group));
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if ($user->isMember($group)) {
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// TRANS: Client exception thrown when trying to join a group the importing user is already a member of.
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throw new ClientException(_("User is already a member of this group."));
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}
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$user->joinGroup($group);
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}
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// XXX: largely cadged from Ostatus_profile::processNote()
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function postNote($user, $author, $activity)
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{
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$note = $activity->objects[0];
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$sourceUri = $note->id;
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$notice = Notice::staticGet('uri', $sourceUri);
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if (!empty($notice)) {
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common_log(LOG_INFO, "Notice {$sourceUri} already exists.");
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if ($this->trusted) {
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$profile = $notice->getProfile();
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$uri = $profile->getUri();
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if ($uri == $author->id) {
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common_log(LOG_INFO, "Updating notice author from $author->id to $user->uri");
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$orig = clone($notice);
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$notice->profile_id = $user->id;
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$notice->update($orig);
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return;
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} else {
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// TRANS: Client exception thrown when trying to import a notice by another user.
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// TRANS: %1$s is the source URI of the notice, %2$s is the URI of the author.
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throw new ClientException(sprintf(_('Already know about notice %1$s and '.
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' it has a different author %2$s.'),
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$sourceUri, $uri));
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}
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} else {
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// TRANS: Client exception thrown when trying to overwrite the author information for a non-trusted user during import.
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throw new ClientException(_('Not overwriting author info for non-trusted user.'));
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}
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}
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// Use summary as fallback for content
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if (!empty($note->content)) {
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$sourceContent = $note->content;
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} else if (!empty($note->summary)) {
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$sourceContent = $note->summary;
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} else if (!empty($note->title)) {
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$sourceContent = $note->title;
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} else {
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// @fixme fetch from $sourceUrl?
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// TRANS: Client exception thrown when trying to import a notice without content.
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// TRANS: %s is the notice URI.
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throw new ClientException(sprintf(_('No content for notice %s.'),$sourceUri));
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}
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// Get (safe!) HTML and text versions of the content
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$rendered = $this->purify($sourceContent);
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$content = html_entity_decode(strip_tags($rendered), ENT_QUOTES, 'UTF-8');
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$shortened = $user->shortenLinks($content);
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$options = array('is_local' => Notice::LOCAL_PUBLIC,
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'uri' => $sourceUri,
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'rendered' => $rendered,
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'replies' => array(),
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'groups' => array(),
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'tags' => array(),
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'urls' => array(),
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'distribute' => false);
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// Check for optional attributes...
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if (!empty($activity->time)) {
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$options['created'] = common_sql_date($activity->time);
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}
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if ($activity->context) {
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// Any individual or group attn: targets?
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list($options['groups'], $options['replies']) = $this->filterAttention($activity->context->attention);
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// Maintain direct reply associations
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// @fixme what about conversation ID?
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if (!empty($activity->context->replyToID)) {
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$orig = Notice::staticGet('uri',
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$activity->context->replyToID);
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if (!empty($orig)) {
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$options['reply_to'] = $orig->id;
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}
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}
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$location = $activity->context->location;
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if ($location) {
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$options['lat'] = $location->lat;
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$options['lon'] = $location->lon;
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if ($location->location_id) {
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$options['location_ns'] = $location->location_ns;
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$options['location_id'] = $location->location_id;
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}
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}
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}
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// Atom categories <-> hashtags
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foreach ($activity->categories as $cat) {
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if ($cat->term) {
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$term = common_canonical_tag($cat->term);
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if ($term) {
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$options['tags'][] = $term;
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}
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}
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}
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// Atom enclosures -> attachment URLs
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foreach ($activity->enclosures as $href) {
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// @fixme save these locally or....?
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$options['urls'][] = $href;
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}
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common_log(LOG_INFO, "Saving notice {$options['uri']}");
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$saved = Notice::saveNew($user->id,
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$content,
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'restore', // TODO: restore the actual source
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$options);
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return $saved;
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}
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function filterAttention($attn)
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{
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$groups = array();
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$replies = array();
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foreach (array_unique($attn) as $recipient) {
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// Is the recipient a local user?
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$user = User::staticGet('uri', $recipient);
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if ($user) {
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// @fixme sender verification, spam etc?
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$replies[] = $recipient;
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continue;
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}
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// Is the recipient a remote group?
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$oprofile = Ostatus_profile::ensureProfileURI($recipient);
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if ($oprofile) {
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if (!$oprofile->isGroup()) {
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// may be canonicalized or something
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$replies[] = $oprofile->uri;
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}
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continue;
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}
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// Is the recipient a local group?
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// @fixme uri on user_group isn't reliable yet
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// $group = User_group::staticGet('uri', $recipient);
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$id = OStatusPlugin::localGroupFromUrl($recipient);
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if ($id) {
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$group = User_group::staticGet('id', $id);
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if ($group) {
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// Deliver to all members of this local group if allowed.
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$profile = $sender->localProfile();
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if ($profile->isMember($group)) {
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$groups[] = $group->id;
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} else {
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common_log(LOG_INFO, "Skipping reply to local group {$group->nickname} as sender {$profile->id} is not a member");
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}
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continue;
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} else {
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common_log(LOG_INFO, "Skipping reply to bogus group $recipient");
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}
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}
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}
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return array($groups, $replies);
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}
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function purify($content)
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{
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require_once INSTALLDIR.'/extlib/htmLawed/htmLawed.php';
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$config = array('safe' => 1,
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'deny_attribute' => 'id,style,on*');
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return htmLawed($content, $config);
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}
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}
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