<?php
/**
 * GNU social - a federating social network
 *
 * ActivityPubPlugin implementation for GNU Social
 *
 * LICENCE: 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  Plugin
 * @package   GNUsocial
 * @author    Diogo Cordeiro <diogo@fc.up.pt>
 * @author    Daniel Supernault <danielsupernault@gmail.com>
 * @copyright 2018 Free Software Foundation http://fsf.org
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link      https://www.gnu.org/software/social/
 */
if (!defined ('GNUSOCIAL')) {
        exit (1);
}

$valid_object_types = array ("Note");

// Validate data
if (!(isset ($data->object->type) && in_array ($data->object->type, $valid_object_types))) {
        ActivityPubReturn::error ("Invalid Object type.");
}
if (!isset ($data->object->content)) {
        ActivityPubReturn::error ("Object content was not specified.");
}
if (!isset ($data->object->url)) {
        ActivityPubReturn::error ("Object url was not specified.");
}

$content = $data->object->content;

$act = new Activity ();
$act->verb = ActivityVerb::POST;
$act->time = time ();
$act->actor = $actor_profile->asActivityObject ();

$act->context = new ActivityContext ();

// Is this a reply?
if (isset ($data->object->reply_to)) {
        try {
                $reply_to = Notice::getByUri ($data->object->reply_to);
        } catch (Exception $e) {
                ActivityPubReturn::error ("Invalid Object reply_to value.");
        }
        $act->context->replyToID  = $reply_to->getUri ();
        $act->context->replyToUrl = $reply_to->getUrl ();
} else {
        $reply_to = null;
}

$act->context->attention = common_get_attentions ($content, $actor_profile, $reply_to);

foreach ($to_profiles as $to)
{
        $act->context->attention[$to->getUri ()] = "http://activitystrea.ms/schema/1.0/person";
}

// Reject notice if it is too long (without the HTML)
// This is done after MediaFile::fromUpload etc. just to act the same as the ApiStatusesUpdateAction
if (Notice::contentTooLong ($content)) {
        ActivityPubReturn::error ("That's too long. Maximum notice size is %d character.");
}

$options = array ('source' => 'ActivityPub', 'uri' => $data->id, 'url' => $data->object->url);
// $options gets filled with possible scoping settings
ToSelector::fillActivity ($this, $act, $options);

$actobj = new ActivityObject ();
$actobj->type = ActivityObject::NOTE;
$actobj->content = common_render_content ($content, $actor_profile, $reply_to);

// Finally add the activity object to our activity
$act->objects[] = $actobj;

try {
        $res = array ("@context" => "https://www.w3.org/ns/activitystreams",
                  "id"     => $data->id,
                  "url"    => $data->object->url,
                  "type"   => "Create",
                  "actor"  => $data->actor,
                  "object" => Activitypub_notice::notice_to_array (Notice::saveActivity ($act, $actor_profile, $options)));
        ActivityPubReturn::answer ($res);
} catch (Exception $e) {
        ActivityPubReturn::error ($e->getMessage ());
}