gnu-social/modules/ActivityModeration/ActivityModerationPlugin.php

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<?php
/**
* @package Activity
* @maintainer Mikael Nordfeldth <mmn@hethane.se>
*/
class ActivityModerationPlugin extends ActivityVerbHandlerPlugin
{
public function tag()
{
return 'actmod';
}
public function types()
{
return array();
}
public function verbs()
{
return array(ActivityVerb::DELETE);
}
public function onBeforePluginCheckSchema()
{
Deleted_notice::beforeSchemaUpdate();
return true;
}
public function onCheckSchema()
{
$schema = Schema::get();
$schema->ensureTable('deleted_notice', Deleted_notice::schemaDef());
return true;
}
public function onGetNoticeSqlTimestamp($id, &$timestamp)
{
try {
$deleted = Deleted_notice::getByID($id);
$timestamp = $deleted->act_created;
} catch (NoResultException $e) {
return true;
}
// we're done for the event, so return false to stop it
return false;
}
public function onIsNoticeDeleted($id, &$deleted)
{
try {
$found = Deleted_notice::getByID($id);
$deleted = ($found instanceof Deleted_notice);
} catch (NoResultException $e) {
$deleted = false;
}
// return true (continue event) if $deleted is false, return false (stop event) if deleted notice was found
return !$deleted;
}
protected function getActionTitle(ManagedAction $action, $verb, Notice $target, Profile $scoped)
{
// FIXME: switch based on action type
return _m('TITLE', 'Notice moderation');
}
protected function doActionPreparation(ManagedAction $action, $verb, Notice $target, Profile $scoped)
{
// pass
}
protected function doActionPost(ManagedAction $action, $verb, Notice $target, Profile $scoped)
{
switch (true) {
case ActivityUtils::compareVerbs($verb, array(ActivityVerb::DELETE)):
// do whatever preparation is necessary to delete a verb
$target->deleteAs($scoped);
break;
default:
throw new ServerException('ActivityVerb POST not handled by plugin that was supposed to do it.');
}
}
public function deleteRelated(Notice $notice)
{
// pass
}
public function onDeleteNoticeAsProfile(Notice $stored, Profile $actor, &$result) {
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// By adding a new object with the 'delete' verb we will trigger
// $this->saveObjectFromActivity that will do the actual ->delete()
if (false === Deleted_notice::addNew($stored, $actor)) {
// false is returned if we did not have an error, but did not create the object
// (i.e. the author is currently being deleted)
return true;
}
// We return false (to stop the event) if the deleted_notice entry was
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// added, which means we have already run $this->saveObjectFromActivity
// which in turn has called the delete function of the notice.
return false;
}
/**
* This is run when a 'delete' verb activity comes in.
*
* @return boolean hook flag
*/
protected function saveObjectFromActivity(Activity $act, Notice $stored, array $options=array())
{
// Everything is done in the StartNoticeSave event
return true;
}
// FIXME: Put this in lib/modules/ActivityHandlerPlugin.php when we're ready
// with the other microapps/activityhandlers as well.
// Also it should be StartNoticeAsActivity (with a prepped Activity, including ->context etc.)
public function onEndNoticeAsActivity(Notice $stored, Activity $act, Profile $scoped=null)
{
if (!$this->isMyNotice($stored)) {
return true;
}
common_debug('Extending activity '.$stored->id.' with '.get_called_class());
$this->extendActivity($stored, $act, $scoped);
return false;
}
/**
* This is run before ->insert, so our task in this function is just to
* delete if it is the delete verb.
*/
public function onStartNoticeSave(Notice $stored)
{
// DELETE is a bit special, we have to remove the existing entry and then
// add a new one with the same URI in order to trigger the distribution.
// (that's why we don't use $this->isMyNotice(...))
if (!ActivityUtils::compareVerbs($stored->verb, array(ActivityVerb::DELETE))) {
return true;
}
try {
$target = Notice::getByUri($stored->uri);
} catch (NoResultException $e) {
throw new AlreadyFulfilledException('Notice URI not found, so we have nothing to delete.');
}
$actor = $stored->getProfile();
$owner = $target->getProfile();
if ($owner->hasRole(Profile_role::DELETED)) {
// Don't bother with replacing notices if its author is being deleted.
// The later "StoreActivityObject" will pick this up and execute
// the deletion then.
// (the "delete verb notice" is too new to ever pass through Notice::saveNew
// which otherwise wouldn't execute the StoreActivityObject event)
return true;
}
// Since the user deleting may not be the same as the notice's owner,
// double-check this and also set the "re-stored" notice profile_id.
if (!$actor->sameAs($owner) && !$actor->hasRight(Right::DELETEOTHERSNOTICE)) {
throw new AuthorizationException(_('You are not allowed to delete another user\'s notice.'));
}
// We copy the identifying fields and replace the sensitive ones.
//$stored->id = $target->id; // We can't copy this since DB_DataObject won't inject it anyway
$props = array('uri', 'profile_id', 'conversation', 'reply_to', 'created', 'repeat_of', 'object_type', 'is_local', 'scope');
foreach($props as $prop) {
$stored->$prop = $target->$prop;
}
// Let's see if this has been deleted already.
try {
$deleted = Deleted_notice::getByKeys( ['uri' => $stored->getUri()] );
return $deleted;
} catch (NoResultException $e) {
$deleted = new Deleted_notice();
$deleted->id = $target->getID();
$deleted->profile_id = $actor->getID();
$deleted->uri = $stored->getUri();
$deleted->act_created = $stored->created;
$deleted->created = common_sql_now();
// throws exception on error
$result = $deleted->insert();
}
// Now we delete the original notice, leaving the id and uri free.
$target->delete();
return true;
}
public function extendActivity(Notice $stored, Activity $act, Profile $scoped=null)
{
Deleted_notice::extendActivity($stored, $act, $scoped);
}
public function activityObjectFromNotice(Notice $notice)
{
$object = Deleted_notice::fromStored($notice);
return $object->asActivityObject();
}
protected function getActivityForm(ManagedAction $action, $verb, Notice $target, Profile $scoped)
{
if (!$scoped instanceof Profile || !($scoped->sameAs($target->getProfile()) || $scoped->hasRight(Right::DELETEOTHERSNOTICE))) {
throw new AuthorizationException(_('You are not allowed to delete other user\'s notices'));
}
return DeletenoticeForm($action, array('notice'=>$target));
}
}