107 lines
3.7 KiB
PHP
107 lines
3.7 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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* 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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* 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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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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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 = $verb ?: ActivityVerb::POST; // post is the default verb
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return ActivityUtils::compareTypes($verb, $this->verbs());
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}
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function isMyType($type) {
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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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