gnu-social/lib/activityimporter.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2010, StatusNet, Inc.
*
* class to import activities as part of a user's timeline
*
* PHP version 5
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Cache
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2010 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
// This check helps protect against security problems;
// your code file can't be executed directly from the web.
exit(1);
}
/**
* Class comment
*
* @category General
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2010 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class ActivityImporter extends QueueHandler
{
private $trusted = false;
/**
* Function comment
*
* @param
*
* @return
*/
function handle($data)
{
list($user, $author, $activity, $trusted) = $data;
$this->trusted = $trusted;
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$done = null;
try {
if (Event::handle('StartImportActivity',
array($user, $author, $activity, $trusted, &$done))) {
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switch ($activity->verb) {
case ActivityVerb::FOLLOW:
$this->subscribeProfile($user, $author, $activity);
break;
case ActivityVerb::JOIN:
$this->joinGroup($user, $activity);
break;
case ActivityVerb::POST:
$this->postNote($user, $author, $activity);
break;
default:
// TRANS: Client exception thrown when using an unknown verb for the activity importer.
throw new ClientException(sprintf(_("Unknown verb: \"%s\"."),$activity->verb));
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}
Event::handle('EndImportActivity',
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array($user, $author, $activity, $trusted));
$done = true;
}
} catch (Exception $e) {
common_log(LOG_ERR, $e->getMessage());
$done = true;
}
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return $done;
}
function subscribeProfile($user, $author, $activity)
{
$profile = $user->getProfile();
if ($activity->objects[0]->id == $author->id) {
if (!$this->trusted) {
// 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.'));
}
$other = $activity->actor;
$otherUser = User::getKV('uri', $other->id);
if (!empty($otherUser)) {
$otherProfile = $otherUser->getProfile();
} else {
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// TRANS: Client exception thrown when trying to force a remote user to subscribe.
throw new Exception(_('Cannot force remote user to subscribe.'));
}
// XXX: don't do this for untrusted input!
Subscription::start($otherProfile, $profile);
} else if (empty($activity->actor)
|| $activity->actor->id == $author->id) {
$other = $activity->objects[0];
$otherProfile = Profile::fromUri($other->id);
if (empty($otherProfile)) {
// TRANS: Client exception thrown when trying to subscribe to an unknown profile.
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throw new ClientException(_('Unknown profile.'));
}
Subscription::start($profile, $otherProfile);
} else {
// TRANS: Client exception thrown when trying to import an event not related to the importing user.
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throw new Exception(_('This activity seems unrelated to our user.'));
}
}
function joinGroup($user, $activity)
{
// XXX: check that actor == subject
$uri = $activity->objects[0]->id;
$group = User_group::getKV('uri', $uri);
if (empty($group)) {
$oprofile = Ostatus_profile::ensureActivityObjectProfile($activity->objects[0]);
if (!$oprofile->isGroup()) {
// 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!'));
}
$group = $oprofile->localGroup();
}
assert(!empty($group));
if ($user->isMember($group)) {
// TRANS: Client exception thrown when trying to join a group the importing user is already a member of.
throw new ClientException(_("User is already a member of this group."));
}
$user->joinGroup($group);
}
// XXX: largely cadged from Ostatus_profile::processNote()
function postNote($user, $author, $activity)
{
$note = $activity->objects[0];
$sourceUri = $note->id;
$notice = Notice::getKV('uri', $sourceUri);
if (!empty($notice)) {
common_log(LOG_INFO, "Notice {$sourceUri} already exists.");
if ($this->trusted) {
$profile = $notice->getProfile();
$uri = $profile->getUri();
if ($uri == $author->id) {
common_log(LOG_INFO, "Updating notice author from $author->id to $user->uri");
$orig = clone($notice);
$notice->profile_id = $user->id;
$notice->update($orig);
return;
} else {
// TRANS: Client exception thrown when trying to import a notice by another user.
// TRANS: %1$s is the source URI of the notice, %2$s is the URI of the author.
throw new ClientException(sprintf(_('Already know about notice %1$s and '.
' it has a different author %2$s.'),
$sourceUri, $uri));
}
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} else {
// TRANS: Client exception thrown when trying to overwrite the author information for a non-trusted user during import.
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throw new ClientException(_('Not overwriting author info for non-trusted user.'));
}
}
// Use summary as fallback for content
if (!empty($note->content)) {
$sourceContent = $note->content;
} else if (!empty($note->summary)) {
$sourceContent = $note->summary;
} else if (!empty($note->title)) {
$sourceContent = $note->title;
} else {
// @fixme fetch from $sourceUrl?
// TRANS: Client exception thrown when trying to import a notice without content.
// TRANS: %s is the notice URI.
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throw new ClientException(sprintf(_('No content for notice %s.'),$sourceUri));
}
// Get (safe!) HTML and text versions of the content
$rendered = $this->purify($sourceContent);
$content = html_entity_decode(strip_tags($rendered), ENT_QUOTES, 'UTF-8');
$shortened = $user->shortenLinks($content);
$options = array('is_local' => Notice::LOCAL_PUBLIC,
'uri' => $sourceUri,
'rendered' => $rendered,
'replies' => array(),
'groups' => array(),
'tags' => array(),
'urls' => array(),
'distribute' => false);
// Check for optional attributes...
if (!empty($activity->time)) {
$options['created'] = common_sql_date($activity->time);
}
if ($activity->context) {
// Any individual or group attn: targets?
list($options['groups'], $options['replies']) = $this->filterAttention($activity->context->attention);
// Maintain direct reply associations
// @fixme what about conversation ID?
if (!empty($activity->context->replyToID)) {
$orig = Notice::getKV('uri',
$activity->context->replyToID);
if (!empty($orig)) {
$options['reply_to'] = $orig->id;
}
}
$location = $activity->context->location;
if ($location) {
$options['lat'] = $location->lat;
$options['lon'] = $location->lon;
if ($location->location_id) {
$options['location_ns'] = $location->location_ns;
$options['location_id'] = $location->location_id;
}
}
}
// Atom categories <-> hashtags
foreach ($activity->categories as $cat) {
if ($cat->term) {
$term = common_canonical_tag($cat->term);
if ($term) {
$options['tags'][] = $term;
}
}
}
// Atom enclosures -> attachment URLs
foreach ($activity->enclosures as $href) {
// @fixme save these locally or....?
$options['urls'][] = $href;
}
common_log(LOG_INFO, "Saving notice {$options['uri']}");
$saved = Notice::saveNew($user->id,
$content,
'restore', // TODO: restore the actual source
$options);
return $saved;
}
function filterAttention($attn)
{
$groups = array();
$replies = array();
foreach (array_unique($attn) as $recipient) {
// Is the recipient a local user?
$user = User::getKV('uri', $recipient);
if ($user) {
// @fixme sender verification, spam etc?
$replies[] = $recipient;
continue;
}
// Is the recipient a remote group?
$oprofile = Ostatus_profile::ensureProfileURI($recipient);
if ($oprofile) {
if (!$oprofile->isGroup()) {
// may be canonicalized or something
$replies[] = $oprofile->uri;
}
continue;
}
// Is the recipient a local group?
// @fixme uri on user_group isn't reliable yet
// $group = User_group::getKV('uri', $recipient);
$id = OStatusPlugin::localGroupFromUrl($recipient);
if ($id) {
$group = User_group::getKV('id', $id);
if ($group) {
// Deliver to all members of this local group if allowed.
$profile = $sender->localProfile();
if ($profile->isMember($group)) {
$groups[] = $group->id;
} else {
common_log(LOG_INFO, "Skipping reply to local group {$group->nickname} as sender {$profile->id} is not a member");
}
continue;
} else {
common_log(LOG_INFO, "Skipping reply to bogus group $recipient");
}
}
}
return array($groups, $replies);
}
function purify($content)
{
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require_once INSTALLDIR.'/extlib/htmLawed/htmLawed.php';
$config = array('safe' => 1,
'deny_attribute' => 'id,style,on*');
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return htmLawed($content, $config);
}
}