gnu-social/lib/microappplugin.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2011, StatusNet, Inc.
*
* Superclass for microapp plugin
*
* 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 Microapp
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2011 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);
}
/**
* Superclass for microapp plugins
*
* This class lets you define micro-applications with different kinds of activities.
*
* The applications work more-or-less like other
*
* @category Microapp
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2011 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
abstract class MicroAppPlugin extends Plugin
{
abstract function appTitle();
abstract function tag();
abstract function types();
abstract function saveNoticeFromActivity($activity, $actor, $options);
abstract function activityObjectFromNotice($notice);
abstract function showNotice($notice, $out);
abstract function entryForm($out);
abstract function deleteRelated($notice);
function isMyNotice($notice) {
$types = $this->types();
return in_array($notice->object_type, $types);
}
function isMyActivity($activity) {
$types = $this->types();
return (count($activity->objects) == 1 &&
in_array($activity->objects[0]->type, $types));
}
/**
* When a notice is deleted, delete the related objects
*
* @param Notice $notice Notice being deleted
*
* @return boolean hook value
*/
function onNoticeDeleteRelated($notice)
{
if ($this->isMyNotice($notice)) {
$this->deleteRelated($notice);
}
return true;
}
/**
* Output the HTML for this kind of object in a list
*
* @param NoticeListItem $nli The list item being shown.
*
* @return boolean hook value
*/
function onStartShowNoticeItem($nli)
{
if (!$this->isMyNotice($nli->notice)) {
return true;
}
$out = $nli->out;
$this->showNotice($notice, $out);
$nli->showNoticeLink();
$nli->showNoticeSource();
$nli->showNoticeLocation();
$nli->showContext();
$nli->showRepeat();
$out->elementEnd('div');
$nli->showNoticeOptions();
return false;
}
/**
* Render a notice as one of our objects
*
* @param Notice $notice Notice to render
* @param ActivityObject &$object Empty object to fill
*
* @return boolean hook value
*/
function onStartActivityObjectFromNotice($notice, &$object)
{
if ($this->isMyNotice($notice)) {
$object = $this->activityObjectFromNotice($notice);
return false;
}
return true;
}
/**
* Handle a posted object from PuSH
*
* @param Activity $activity activity to handle
* @param Ostatus_profile $oprofile Profile for the feed
*
* @return boolean hook value
*/
function onStartHandleFeedEntryWithProfile($activity, $oprofile)
{
if ($this->isMyActivity($activity)) {
$actor = $oprofile->checkAuthorship($activity);
if (empty($actor)) {
throw new ClientException(_('Can\'t get author for activity.'));
}
$object = $activity->objects[0];
$options = array('uri' => $object->id,
'url' => $object->link,
'is_local' => Notice::REMOTE_OMB,
'source' => 'ostatus');
$this->saveNoticeFromActivity($activity, $actor);
return false;
}
return true;
}
/**
* Handle a posted object from Salmon
*
* @param Activity $activity activity to handle
* @param mixed $target user or group targeted
*
* @return boolean hook value
*/
function onStartHandleSalmonTarget($activity, $target)
{
if ($this->isMyActivity($activity)) {
$this->log(LOG_INFO, "Checking {$activity->id} as a valid Salmon slap.");
if ($target instanceof User_group) {
$uri = $target->getUri();
if (!in_array($uri, $activity->context->attention)) {
throw new ClientException(_("Bookmark not posted ".
"to this group."));
}
} else if ($target instanceof User) {
$uri = $target->uri;
$original = null;
if (!empty($activity->context->replyToID)) {
$original = Notice::staticGet('uri',
$activity->context->replyToID);
}
if (!in_array($uri, $activity->context->attention) &&
(empty($original) ||
$original->profile_id != $target->id)) {
throw new ClientException(_("Object not posted ".
"to this user."));
}
} else {
throw new ServerException(_("Don't know how to handle ".
"this kind of target."));
}
$actor = Ostatus_profile::ensureActivityObjectProfile($activity->actor);
$object = $activity->objects[0];
$options = array('uri' => $object->id,
'url' => $object->link,
'is_local' => Notice::REMOTE_OMB,
'source' => 'ostatus');
$this->saveNoticeFromActivity($activity, $actor, $options);
return false;
}
return true;
}
/**
* Handle object posted via AtomPub
*
* @param Activity &$activity Activity that was posted
* @param User $user User that posted it
* @param Notice &$notice Resulting notice
*
* @return boolean hook value
*/
function onStartAtomPubNewActivity(&$activity, $user, &$notice)
{
if ($this->isMyActivity($activity)) {
$options = array('source' => 'atompub');
$this->saveNoticeFromActivity($activity,
$user->getProfile(),
$options);
return false;
}
return true;
}
/**
* Handle object imported from a backup file
*
* @param User $user User to import for
* @param ActivityObject $author Original author per import file
* @param Activity $activity Activity to import
* @param boolean $trusted Is this a trusted user?
* @param boolean &$done Is this done (success or unrecoverable error)
*
* @return boolean hook value
*/
function onStartImportActivity($user, $author, $activity, $trusted, &$done)
{
if ($this->isMyActivity($activity)) {
$obj = $activity->objects[0];
$options = array('uri' => $object->id,
'url' => $object->link,
'source' => 'restore');
$saved = $this->saveNoticeFromActivity($activity,
$user->getProfile(),
$options);
if (!empty($saved)) {
$done = true;
}
return false;
}
return true;
}
function onStartShowEntryForms(&$tabs)
{
$tabs[$this->tag()] = $this->appTitle();
return true;
}
function onStartMakeEntryForm($tag, $out, &$form)
{
$this->log(LOG_INFO, "onStartMakeEntryForm() called for tag '$tag'");
if ($tag == $this->tag()) {
$form = $this->entryForm($out);
return false;
}
return true;
}
}