plugins/ActivityModeration/ActivityModerationPlugin.php

   1 <?php
   2
   3 /**
   4  * @package     Activity
   5  * @maintainer  Mikael Nordfeldth <mmn@hethane.se>
   6  */
   7 class ActivityModerationPlugin extends ActivityVerbHandlerPlugin
   8 {
   9     public function tag()
  10     {
  11         return 'actmod';
  12     }
  13
  14     public function types()
  15     {
  16         return array();
  17     }
  18
  19     public function verbs()
  20     {
  21         return array(ActivityVerb::DELETE);
  22     }
  23
  24     public function onBeforePluginCheckSchema()
  25     {
  26         Deleted_notice::beforeSchemaUpdate();
  27         return true;
  28     }
  29
  30     public function onCheckSchema()
  31     {
  32         $schema = Schema::get();
  33         $schema->ensureTable('deleted_notice', Deleted_notice::schemaDef());
  34         return true;
  35     }
  36
  37     protected function getActionTitle(ManagedAction $action, $verb, Notice $target, Profile $scoped)
  38     {
  39         // FIXME: switch based on action type
  40         return _m('TITLE', 'Notice moderation');
  41     }
  42
  43     protected function doActionPreparation(ManagedAction $action, $verb, Notice $target, Profile $scoped)
  44     {
  45         // pass
  46     }
  47
  48     protected function doActionPost(ManagedAction $action, $verb, Notice $target, Profile $scoped)
  49     {
  50         switch (true) {
  51         case ActivityUtils::compareVerbs($verb, array(ActivityVerb::DELETE)):
  52             // do whatever preparation is necessary to delete a verb
  53             $target->delete();
  54             break;
  55         default:
  56             throw new ServerException('ActivityVerb POST not handled by plugin that was supposed to do it.');
  57         }
  58     }
  59
  60     public function deleteRelated(Notice $notice)
  61     {
  62         // pass
  63     }
  64
  65     public function onDeleteNoticeAsProfile(Notice $stored, Profile $actor, &$result) {
  66         // By adding a new 'delete' verb we will eventually trigger $this->saveObjectFromActivity
  67         if (false === Deleted_notice::addNew($stored, $actor)) {
  68             // false is returned if we did not have an error, but did not create the object
  69             // (i.e. the author is currently being deleted)
  70             return true;
  71         }
  72
  73         // We return false (to stop the event) if the deleted_notice entry was
  74         // added, which means we have run $this->saveObjectFromActivity which
  75         // in turn has called the delete function of the notice.
  76         return false;
  77     }
  78
  79     /**
  80      * This is run when a 'delete' verb activity comes in.
  81      *
  82      * @return boolean hook flag
  83      */
  84     protected function saveObjectFromActivity(Activity $act, Notice $stored, array $options=array())
  85     {
  86         // Let's see if this has been deleted already.
  87         $deleted = Deleted_notice::getKV('uri', $act->id);
  88         if ($deleted instanceof Deleted_notice) {
  89             return $deleted;
  90         }
  91
  92         $target = Notice::getByUri($act->objects[0]->id);
  93         common_debug('DELETING notice: ' . $act->objects[0]->id . ' on behalf of profile id==' . $target->getProfile()->getID());
  94
  95         $deleted = new Deleted_notice();
  96
  97         $deleted->id            = $target->getID();
  98         $deleted->profile_id    = $target->getProfile()->getID();
  99         $deleted->uri           = $act->id;
 100         $deleted->act_uri       = $target->getUri();
 101         $deleted->act_created   = $target->created;
 102         $deleted->created       = common_sql_now();
 103
 104         $result = $deleted->insert();
 105         if ($result === false) {
 106             throw new ServerException('Could not insert Deleted_notice entry into database!');
 107         }
 108
 109         $target->delete();
 110
 111         return $deleted;
 112     }
 113
 114     // FIXME: Put this in lib/activityhandlerplugin.php when we're ready
 115     //          with the other microapps/activityhandlers as well.
 116     //          Also it should be StartNoticeAsActivity (with a prepped Activity, including ->context etc.)
 117     public function onEndNoticeAsActivity(Notice $stored, Activity $act, Profile $scoped=null)
 118     {
 119         if (!$this->isMyNotice($stored)) {
 120             return true;
 121         }
 122
 123         common_debug('Extending activity '.$stored->id.' with '.get_called_class());
 124         $this->extendActivity($stored, $act, $scoped);
 125         return false;
 126     }
 127
 128     public function extendActivity(Notice $stored, Activity $act, Profile $scoped=null)
 129     {
 130         Deleted_notice::extendActivity($stored, $act, $scoped);
 131     }
 132
 133     public function activityObjectFromNotice(Notice $notice)
 134     {
 135         $object = Deleted_notice::fromStored($notice);
 136         return $object->asActivityObject();
 137     }
 138
 139     protected function getActivityForm(ManagedAction $action, $verb, Notice $target, Profile $scoped)
 140     {
 141         if (!$scoped instanceof Profile || !($scoped->sameAs($target->getProfile()) || $scoped->hasRight(Right::DELETEOTHERSNOTICE))) {
 142             throw new AuthorizationException(_('You are not allowed to delete other user\'s notices'));
 143         }
 144         return DeletenoticeForm($action, array('notice'=>$target));
 145     }
 146 }