641 lines
22 KiB
PHP
641 lines
22 KiB
PHP
<?php
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/*
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* GNU Social - a federating social network
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* Copyright (C) 2014, Free Software Foundation, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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if (!defined('GNUSOCIAL')) { exit(1); }
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/**
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* Superclass for plugins which add Activity types and such
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*
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* @category Activity
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* @package GNUsocial
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* @author Mikael Nordfeldth <mmn@hethane.se>
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* @copyright 2014 Free Software Foundation, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://gnu.io/social
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*/
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abstract class ActivityHandlerPlugin extends Plugin
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{
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/**
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* Returns a key string which represents this activity in HTML classes,
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* ids etc, as when offering selection of what type of post to make.
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* In MicroAppPlugin, this is paired with the user-visible localizable appTitle().
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*
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* @return string (compatible with HTML classes)
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*/
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abstract function tag();
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/**
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* Return a list of ActivityStreams object type IRIs
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* which this micro-app handles. Default implementations
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* of the base class will use this list to check if a
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* given ActivityStreams object belongs to us, via
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* $this->isMyNotice() or $this->isMyActivity.
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*
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* An empty list means any type is ok. (Favorite verb etc.)
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*
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* @return array of strings
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*/
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abstract function types();
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/**
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* Return a list of ActivityStreams verb IRIs which
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* this micro-app handles. Default implementations
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* of the base class will use this list to check if a
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* given ActivityStreams verb belongs to us, via
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* $this->isMyNotice() or $this->isMyActivity.
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*
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* All micro-app classes must override this method.
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*
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* @return array of strings
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*/
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public function verbs() {
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return array(ActivityVerb::POST);
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}
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/**
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* Check if a given ActivityStreams activity should be handled by this
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* micro-app plugin.
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*
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* The default implementation checks against the activity type list
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* returned by $this->types(), and requires that exactly one matching
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* object be present. You can override this method to expand
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* your checks or to compare the activity's verb, etc.
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*
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* @param Activity $activity
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* @return boolean
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*/
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function isMyActivity(Activity $act) {
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return (count($act->objects) == 1
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&& ($act->objects[0] instanceof ActivityObject)
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&& $this->isMyVerb($act->verb)
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&& $this->isMyType($act->objects[0]->type));
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}
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/**
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* Check if a given notice object should be handled by this micro-app
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* plugin.
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*
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* The default implementation checks against the activity type list
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* returned by $this->types(). You can override this method to expand
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* your checks, but follow the execution chain to get it right.
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*
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* @param Notice $notice
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* @return boolean
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*/
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function isMyNotice(Notice $notice) {
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return $this->isMyVerb($notice->verb) && $this->isMyType($notice->object_type);
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}
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function isMyVerb($verb) {
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$verb = $verb ?: ActivityVerb::POST; // post is the default verb
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return ActivityUtils::compareVerbs($verb, $this->verbs());
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}
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function isMyType($type) {
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// Third argument to compareTypes is true, to allow for notices with empty object_type for example (verb-only)
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return count($this->types())===0 || ActivityUtils::compareTypes($type, $this->types());
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}
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/**
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* Given a parsed ActivityStreams activity, your plugin
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* gets to figure out how to actually save it into a notice
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* and any additional data structures you require.
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*
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* This function is deprecated and in the future, Notice::saveActivity
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* should be called from onStartHandleFeedEntryWithProfile in this class
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* (which instead turns to saveObjectFromActivity).
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*
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* @param Activity $activity
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* @param Profile $actor
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* @param array $options=array()
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*
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* @return Notice the resulting notice
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*/
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public function saveNoticeFromActivity(Activity $activity, Profile $actor, array $options=array())
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{
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// Any plugin which has not implemented saveObjectFromActivity _must_
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// override this function until they are migrated (this function will
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// be deleted when all plugins are migrated to saveObjectFromActivity).
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if (isset($this->oldSaveNew)) {
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throw new ServerException('A function has been called for new saveActivity functionality, but is still set with an oldSaveNew configuration');
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}
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return Notice::saveActivity($activity, $actor, $options);
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}
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/**
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* Given a parsed ActivityStreams activity, your plugin gets
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* to figure out itself how to store the additional data into
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* the database, besides the base data stored by the core.
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*
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* This will handle just about all events where an activity
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* object gets saved, whether it is via AtomPub, OStatus
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* (WebSub and Salmon transports), or ActivityStreams-based
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* backup/restore of account data.
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*
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* You should be able to accept as input the output from an
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* asActivity() call on the stored object. Where applicable,
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* try to use existing ActivityStreams structures and object
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* types, and be liberal in accepting input from what might
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* be other compatible apps.
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*
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* All micro-app classes must override this method.
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*
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* @fixme are there any standard options?
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*
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* @param Activity $activity
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* @param Notice $stored The notice in our database for this certain object
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* @param array $options=array()
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*
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* @return object If the verb handling plugin creates an object, it can be returned here (otherwise true)
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* @throws exception On any error.
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*/
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protected function saveObjectFromActivity(Activity $activity, Notice $stored, array $options=array())
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{
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throw new ServerException('This function should be abstract when all plugins have migrated to saveObjectFromActivity');
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}
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/*
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* This usually gets called from Notice::saveActivity after a Notice object has been created,
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* so it contains a proper id and a uri for the object to be saved.
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*/
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public function onStoreActivityObject(Activity $act, Notice $stored, array $options, &$object) {
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// $this->oldSaveNew is there during a migration period of plugins, to start using
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// Notice::saveActivity instead of Notice::saveNew
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if (!$this->isMyActivity($act) || isset($this->oldSaveNew)) {
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return true;
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}
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$object = $this->saveObjectFromActivity($act, $stored, $options);
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return false;
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}
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/**
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* Given an existing Notice object, your plugin gets to
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* figure out how to arrange it into an ActivityStreams
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* object.
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*
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* This will be how your specialized notice gets output in
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* Atom feeds and JSON-based ActivityStreams output, including
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* account backup/restore and OStatus (WebSub and Salmon transports).
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*
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* You should be able to round-trip data from this format back
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* through $this->saveNoticeFromActivity(). Where applicable, try
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* to use existing ActivityStreams structures and object types,
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* and consider interop with other compatible apps.
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*
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* All micro-app classes must override this method.
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*
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* @fixme this outputs an ActivityObject, not an Activity. Any compat issues?
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*
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* @param Notice $notice
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*
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* @return ActivityObject
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*/
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abstract function activityObjectFromNotice(Notice $notice);
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/**
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* When a notice is deleted, you'll be called here for a chance
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* to clean up any related resources.
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*
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* All micro-app classes must override this method.
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*
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* @param Notice $notice
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*/
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abstract function deleteRelated(Notice $notice);
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protected function notifyMentioned(Notice $stored, array &$mentioned_ids)
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{
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// pass through silently by default
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// If we want to stop any other plugin from notifying based on this activity, return false instead.
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return true;
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}
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/**
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* Called when generating Atom XML ActivityStreams output from an
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* ActivityObject belonging to this plugin. Gives the plugin
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* a chance to add custom output.
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*
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* Note that you can only add output of additional XML elements,
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* not change existing stuff here.
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*
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* If output is already handled by the base Activity classes,
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* you can leave this base implementation as a no-op.
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*
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* @param ActivityObject $obj
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* @param XMLOutputter $out to add elements at end of object
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*/
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function activityObjectOutputAtom(ActivityObject $obj, XMLOutputter $out)
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{
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// default is a no-op
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}
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/**
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* Called when generating JSON ActivityStreams output from an
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* ActivityObject belonging to this plugin. Gives the plugin
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* a chance to add custom output.
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*
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* Modify the array contents to your heart's content, and it'll
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* all get serialized out as JSON.
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*
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* If output is already handled by the base Activity classes,
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* you can leave this base implementation as a no-op.
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*
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* @param ActivityObject $obj
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* @param array &$out JSON-targeted array which can be modified
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*/
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public function activityObjectOutputJson(ActivityObject $obj, array &$out)
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{
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// default is a no-op
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}
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/**
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* When a notice is deleted, delete the related objects
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* by calling the overridable $this->deleteRelated().
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*
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* @param Notice $notice Notice being deleted
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*
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* @return boolean hook value
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*/
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public function onNoticeDeleteRelated(Notice $notice)
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{
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if ($this->isMyNotice($notice)) {
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try {
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$this->deleteRelated($notice);
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} catch (NoProfileException $e) {
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// we failed because of database lookup failure, Notice has no recognized profile as creator
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// so we skip this. If we want to remove missing notices we should do a SQL constraints check
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// in the affected plugin.
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} catch (AlreadyFulfilledException $e) {
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// Nothing to see here, it's obviously already gone...
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}
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}
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// Always continue this event in our activity handling plugins.
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return true;
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}
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/**
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* @param Notice $stored The notice being distributed
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* @param array &$mentioned_ids List of profiles (from $stored->getReplies())
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*/
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public function onStartNotifyMentioned(Notice $stored, array &$mentioned_ids)
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{
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if (!$this->isMyNotice($stored)) {
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return true;
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}
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return $this->notifyMentioned($stored, $mentioned_ids);
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}
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/**
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* Render a notice as one of our objects
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*
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* @param Notice $notice Notice to render
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* @param ActivityObject &$object Empty object to fill
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*
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* @return boolean hook value
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*/
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function onStartActivityObjectFromNotice(Notice $notice, &$object)
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{
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if (!$this->isMyNotice($notice)) {
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return true;
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}
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$object = $this->activityObjectFromNotice($notice);
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return false;
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}
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/**
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* Handle a posted object from WebSub
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*
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* @param Activity $activity activity to handle
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* @param Profile $actor Profile for the feed
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*
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* @return boolean hook value
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*/
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function onStartHandleFeedEntryWithProfile(Activity $activity, Profile $profile, &$notice)
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{
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if (!$this->isMyActivity($activity)) {
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return true;
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}
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// We are guaranteed to get a Profile back from checkAuthorship (or it throws an exception)
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$profile = ActivityUtils::checkAuthorship($activity, $profile);
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$object = $activity->objects[0];
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$options = array('uri' => $object->id,
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'url' => $object->link,
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'self' => $object->selfLink,
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'is_local' => Notice::REMOTE,
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'source' => 'ostatus');
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if (!isset($this->oldSaveNew)) {
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$notice = Notice::saveActivity($activity, $profile, $options);
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} else {
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$notice = $this->saveNoticeFromActivity($activity, $profile, $options);
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}
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return false;
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}
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/**
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* Handle a posted object from Salmon
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*
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* @param Activity $activity activity to handle
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* @param mixed $target user or group targeted
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*
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* @return boolean hook value
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*/
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function onStartHandleSalmonTarget(Activity $activity, $target)
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{
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if (!$this->isMyActivity($activity)) {
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return true;
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}
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if (!isset($this->oldSaveNew)) {
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// Handle saveActivity in OStatus class for incoming salmon, remove this event
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// handler when all plugins have gotten rid of "oldSaveNew".
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return true;
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}
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$this->log(LOG_INFO, get_called_class()." checking {$activity->id} as a valid Salmon slap.");
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if ($target instanceof User_group || $target->isGroup()) {
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$uri = $target->getUri();
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if (!array_key_exists($uri, $activity->context->attention)) {
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// @todo FIXME: please document (i18n).
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// TRANS: Client exception thrown when ...
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throw new ClientException(_('Object not posted to this group.'));
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}
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} elseif ($target instanceof Profile && $target->isLocal()) {
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$original = null;
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// FIXME: Shouldn't favorites show up with a 'target' activityobject?
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if (!ActivityUtils::compareVerbs($activity->verb, array(ActivityVerb::POST)) && isset($activity->objects[0])) {
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// If this is not a post, it's a verb targeted at something (such as a Favorite attached to a note)
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if (!empty($activity->objects[0]->id)) {
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$activity->context->replyToID = $activity->objects[0]->id;
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}
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}
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if (!empty($activity->context->replyToID)) {
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$original = Notice::getKV('uri', $activity->context->replyToID);
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}
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if ((!$original instanceof Notice || $original->profile_id != $target->id)
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&& !array_key_exists($target->getUri(), $activity->context->attention)) {
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// @todo FIXME: Please document (i18n).
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// TRANS: Client exception when ...
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throw new ClientException(_('Object not posted to this user.'));
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}
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} else {
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// TRANS: Server exception thrown when a micro app plugin uses a target that cannot be handled.
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throw new ServerException(_('Do not know how to handle this kind of target.'));
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}
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$oactor = Ostatus_profile::ensureActivityObjectProfile($activity->actor);
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$actor = $oactor->localProfile();
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// FIXME: will this work in all cases? I made it work for Favorite...
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if (ActivityUtils::compareVerbs($activity->verb, array(ActivityVerb::POST))) {
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$object = $activity->objects[0];
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} else {
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$object = $activity;
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}
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$options = array('uri' => $object->id,
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'url' => $object->link,
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'self' => $object->selfLink,
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'is_local' => Notice::REMOTE,
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'source' => 'ostatus');
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$notice = $this->saveNoticeFromActivity($activity, $actor, $options);
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return false;
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}
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/**
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* Handle object posted via AtomPub
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*
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* @param Activity $activity Activity that was posted
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* @param Profile $scoped Profile of user posting
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* @param Notice &$notice Resulting notice
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*
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* @return boolean hook value
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*/
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public function onStartAtomPubNewActivity(Activity $activity, Profile $scoped, Notice &$notice=null)
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{
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if (!$this->isMyActivity($activity)) {
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return true;
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}
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$options = array('source' => 'atompub');
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$notice = $this->saveNoticeFromActivity($activity, $scoped, $options);
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return false;
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}
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/**
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* Handle object imported from a backup file
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*
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* @param User $user User to import for
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* @param ActivityObject $author Original author per import file
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* @param Activity $activity Activity to import
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* @param boolean $trusted Is this a trusted user?
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* @param boolean &$done Is this done (success or unrecoverable error)
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*
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* @return boolean hook value
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*/
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function onStartImportActivity($user, $author, Activity $activity, $trusted, &$done)
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{
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if (!$this->isMyActivity($activity)) {
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return true;
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}
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$obj = $activity->objects[0];
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$options = array('uri' => $object->id,
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'url' => $object->link,
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'self' => $object->selfLink,
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'source' => 'restore');
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// $user->getProfile() is a Profile
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$saved = $this->saveNoticeFromActivity($activity,
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$user->getProfile(),
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$options);
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if (!empty($saved)) {
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$done = true;
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}
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return false;
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}
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/**
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* Event handler gives the plugin a chance to add custom
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* Atom XML ActivityStreams output from a previously filled-out
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* ActivityObject.
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*
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* The atomOutput method is called if it's one of
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* our matching types.
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*
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* @param ActivityObject $obj
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* @param XMLOutputter $out to add elements at end of object
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* @return boolean hook return value
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*/
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function onEndActivityObjectOutputAtom(ActivityObject $obj, XMLOutputter $out)
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{
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if (in_array($obj->type, $this->types())) {
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$this->activityObjectOutputAtom($obj, $out);
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}
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return true;
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}
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/**
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* Event handler gives the plugin a chance to add custom
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* JSON ActivityStreams output from a previously filled-out
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* ActivityObject.
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*
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* The activityObjectOutputJson method is called if it's one of
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* our matching types.
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*
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* @param ActivityObject $obj
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* @param array &$out JSON-targeted array which can be modified
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* @return boolean hook return value
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*/
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function onEndActivityObjectOutputJson(ActivityObject $obj, array &$out)
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{
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if (in_array($obj->type, $this->types())) {
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$this->activityObjectOutputJson($obj, $out);
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}
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return true;
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}
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public function onStartOpenNoticeListItemElement(NoticeListItem $nli)
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{
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if (!$this->isMyNotice($nli->notice)) {
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return true;
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}
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$this->openNoticeListItemElement($nli);
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|
|
Event::handle('EndOpenNoticeListItemElement', array($nli));
|
|
return false;
|
|
}
|
|
|
|
public function onStartCloseNoticeListItemElement(NoticeListItem $nli)
|
|
{
|
|
if (!$this->isMyNotice($nli->notice)) {
|
|
return true;
|
|
}
|
|
|
|
$this->closeNoticeListItemElement($nli);
|
|
|
|
Event::handle('EndCloseNoticeListItemElement', array($nli));
|
|
return false;
|
|
}
|
|
|
|
protected function openNoticeListItemElement(NoticeListItem $nli)
|
|
{
|
|
$id = (empty($nli->repeat)) ? $nli->notice->id : $nli->repeat->id;
|
|
$class = 'h-entry notice ' . $this->tag();
|
|
if ($nli->notice->scope != 0 && $nli->notice->scope != 1) {
|
|
$class .= ' limited-scope';
|
|
}
|
|
try {
|
|
$class .= ' notice-source-'.common_to_alphanumeric($nli->notice->source);
|
|
} catch (Exception $e) {
|
|
// either source or what we filtered out was a zero-length string
|
|
}
|
|
$nli->out->elementStart('li', array('class' => $class,
|
|
'id' => 'notice-' . $id));
|
|
}
|
|
|
|
protected function closeNoticeListItemElement(NoticeListItem $nli)
|
|
{
|
|
$nli->out->elementEnd('li');
|
|
}
|
|
|
|
|
|
// FIXME: This is overriden in MicroAppPlugin but shouldn't have to be
|
|
public function onStartShowNoticeItem(NoticeListItem $nli)
|
|
{
|
|
if (!$this->isMyNotice($nli->notice)) {
|
|
return true;
|
|
}
|
|
|
|
try {
|
|
$this->showNoticeListItem($nli);
|
|
} catch (Exception $e) {
|
|
common_log(LOG_ERR, 'Error showing notice '.$nli->getNotice()->getID().': ' . $e->getMessage());
|
|
$nli->out->element('p', 'error', sprintf(_('Error showing notice: %s'), $e->getMessage()));
|
|
}
|
|
|
|
Event::handle('EndShowNoticeItem', array($nli));
|
|
return false;
|
|
}
|
|
|
|
protected function showNoticeListItem(NoticeListItem $nli)
|
|
{
|
|
$nli->showNoticeHeaders();
|
|
$nli->showContent();
|
|
$nli->showNoticeFooter();
|
|
}
|
|
|
|
public function onStartShowNoticeItemNotice(NoticeListItem $nli)
|
|
{
|
|
if (!$this->isMyNotice($nli->notice)) {
|
|
return true;
|
|
}
|
|
|
|
$this->showNoticeItemNotice($nli);
|
|
|
|
Event::handle('EndShowNoticeItemNotice', array($nli));
|
|
return false;
|
|
}
|
|
|
|
protected function showNoticeItemNotice(NoticeListItem $nli)
|
|
{
|
|
$nli->showNoticeTitle();
|
|
$nli->showAuthor();
|
|
$nli->showAddressees();
|
|
$nli->showContent();
|
|
}
|
|
|
|
public function onStartShowNoticeContent(Notice $stored, HTMLOutputter $out, Profile $scoped=null)
|
|
{
|
|
if (!$this->isMyNotice($stored)) {
|
|
return true;
|
|
}
|
|
|
|
try {
|
|
$this->showNoticeContent($stored, $out, $scoped);
|
|
} catch (Exception $e) {
|
|
$out->element('div', 'error', $e->getMessage());
|
|
}
|
|
return false;
|
|
}
|
|
|
|
protected function showNoticeContent(Notice $stored, HTMLOutputter $out, Profile $scoped=null)
|
|
{
|
|
$out->text($stored->getContent());
|
|
}
|
|
}
|