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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 = $trusted;
+
+ try {
+ switch ($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, $activity);
+ break;
+ default:
+ throw new Exception("Unknown verb: {$activity->verb}");
+ }
+ } catch (ClientException $ce) {
+ common_log(LOG_WARNING, $ce->getMessage());
+ return true;
+ } catch (ServerException $se) {
+ common_log(LOG_ERR, $se->getMessage());
+ return false;
+ } catch (Exception $e) {
+ common_log(LOG_ERR, $e->getMessage());
+ return false;
+ }
+ return true;
+ }
+
+ function subscribeProfile($user, $author, $activity)
+ {
+ $profile = $user->getProfile();
+
+ if ($activity->objects[0]->id == $author->id) {
+
+ if (!$this->trusted) {
+ throw new ClientException(_("Can't force subscription for untrusted user."));
+ }
+
+ $other = $activity->actor;
+ $otherUser = User::staticGet('uri', $other->id);
+
+ if (!empty($otherUser)) {
+ $otherProfile = $otherUser->getProfile();
+ } else {
+ throw new Exception("Can't force remote user to subscribe.");
+ }
+
+ // XXX: don't do this for untrusted input!
+
+ Subscription::start($otherProfile, $profile);
+
+ } else if (empty($activity->actor)
+ || $activity->actor->id == $author->id) {
+
+ $other = $activity->objects[0];
+
+ $otherProfile = Profile::fromUri($other->id);
+
+ if (empty($otherProfile)) {
+ throw new ClientException(_("Unknown profile."));
+ }
+
+ Subscription::start($profile, $otherProfile);
+ } else {
+ throw new Exception("This activity seems unrelated to our user.");
+ }
+ }
+
+ function joinGroup($user, $activity)
+ {
+ // XXX: check that actor == subject
+
+ $uri = $activity->objects[0]->id;
+
+ $group = User_group::staticGet('uri', $uri);
+
+ if (empty($group)) {
+ $oprofile = Ostatus_profile::ensureActivityObjectProfile($activity->objects[0]);
+ if (!$oprofile->isGroup()) {
+ throw new ClientException("Remote profile is not a group!");
+ }
+ $group = $oprofile->localGroup();
+ }
+
+ assert(!empty($group));
+
+ if ($user->isMember($group)) {
+ throw new ClientException("User is already a member of this group.");
+ }
+
+ if (Event::handle('StartJoinGroup', array($group, $user))) {
+ Group_member::join($group->id, $user->id);
+ Event::handle('EndJoinGroup', array($group, $user));
+ }
+ }
+
+ // XXX: largely cadged from Ostatus_profile::processNote()
+
+ function postNote($user, $author, $activity)
+ {
+ $note = $activity->objects[0];
+
+ $sourceUri = $note->id;
+
+ $notice = Notice::staticGet('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 {
+ throw new ClientException(sprintf(_("Already know about notice %s and ".
+ " it's got a different author %s."),
+ $sourceUri, $uri));
+ }
+ } else {
+ throw new ClientException("Not overwriting author info for non-trusted user.");
+ }
+ }
+
+ // Use summary as fallback for content
+
+ if (!empty($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 $sourceUrl?
+ // @todo i18n FIXME: use sprintf and add i18n.
+ throw new ClientException("No content for notice {$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::staticGet('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::staticGet('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::staticGet('uri', $recipient);
+ $id = OStatusPlugin::localGroupFromUrl($recipient);
+
+ if ($id) {
+ $group = User_group::staticGet('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)
+ {
+ require_once INSTALLDIR.'/extlib/htmLawed/htmLawed.php';
+
+ $config = array('safe' => 1,
+ 'deny_attribute' => 'id,style,on*');
+
+ return htmLawed($content, $config);
+ }
+}
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