3 * StatusNet - the distributed open-source microblogging tool
4 * Copyright (C) 2011, StatusNet, Inc.
6 * Superclass for microapp plugin
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU Affero General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Affero General Public License for more details.
20 * You should have received a copy of the GNU Affero General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 * @author Evan Prodromou <evan@status.net>
26 * @copyright 2011 StatusNet, Inc.
27 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
28 * @link http://status.net/
31 if (!defined('STATUSNET')) {
32 // This check helps protect against security problems;
33 // your code file can't be executed directly from the web.
38 * Superclass for microapp plugins
40 * This class lets you define micro-applications with different kinds of activities.
42 * The applications work more-or-less like other
46 * @author Evan Prodromou <evan@status.net>
47 * @copyright 2011 StatusNet, Inc.
48 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
49 * @link http://status.net/
51 abstract class MicroAppPlugin extends Plugin
54 * Returns a localized string which represents this micro-app,
55 * to be shown to users selecting what type of post to make.
56 * This is paired with the key string in $this->tag().
58 * All micro-app classes must override this method.
62 abstract function appTitle();
65 * Returns a key string which represents this micro-app in HTML
66 * ids etc, as when offering selection of what type of post to make.
67 * This is paired with the user-visible localizable $this->appTitle().
69 * All micro-app classes must override this method.
71 abstract function tag();
74 * Return a list of ActivityStreams object type URIs
75 * which this micro-app handles. Default implementations
76 * of the base class will use this list to check if a
77 * given ActivityStreams object belongs to us, via
78 * $this->isMyNotice() or $this->isMyActivity.
80 * All micro-app classes must override this method.
82 * @fixme can we confirm that these types are the same
83 * for Atom and JSON streams? Any limitations or issues?
85 * @return array of strings
87 abstract function types();
90 * Given a parsed ActivityStreams activity, your plugin
91 * gets to figure out how to actually save it into a notice
92 * and any additional data structures you require.
94 * This will handle things received via AtomPub, OStatus
95 * (PuSH and Salmon transports), or ActivityStreams-based
96 * backup/restore of account data.
98 * You should be able to accept as input the output from your
99 * $this->activityObjectFromNotice(). Where applicable, try to
100 * use existing ActivityStreams structures and object types,
101 * and be liberal in accepting input from what might be other
104 * All micro-app classes must override this method.
106 * @fixme are there any standard options?
108 * @param Activity $activity
109 * @param Profile $actor
110 * @param array $options=array()
112 * @return Notice the resulting notice
114 abstract function saveNoticeFromActivity($activity, $actor, $options=array());
117 * Given an existing Notice object, your plugin gets to
118 * figure out how to arrange it into an ActivityStreams
121 * This will be how your specialized notice gets output in
122 * Atom feeds and JSON-based ActivityStreams output, including
123 * account backup/restore and OStatus (PuSH and Salmon transports).
125 * You should be able to round-trip data from this format back
126 * through $this->saveNoticeFromActivity(). Where applicable, try
127 * to use existing ActivityStreams structures and object types,
128 * and consider interop with other compatible apps.
130 * All micro-app classes must override this method.
132 * @fixme this outputs an ActivityObject, not an Activity. Any compat issues?
134 * @param Notice $notice
136 * @return ActivityObject
138 abstract function activityObjectFromNotice($notice);
141 * When building the primary notice form, we'll fetch also some
142 * alternate forms for specialized types -- that's you!
144 * Return a custom Widget or Form object for the given output
145 * object, and it'll be included in the HTML output. Beware that
146 * your form may be initially hidden.
148 * All micro-app classes must override this method.
150 * @param HTMLOutputter $out
153 abstract function entryForm($out);
156 * When a notice is deleted, you'll be called here for a chance
157 * to clean up any related resources.
159 * All micro-app classes must override this method.
161 * @param Notice $notice
163 abstract function deleteRelated($notice);
166 * Check if a given notice object should be handled by this micro-app
169 * The default implementation checks against the activity type list
170 * returned by $this->types(). You can override this method to expand
173 * @param Notice $notice
176 function isMyNotice($notice) {
177 $types = $this->types();
178 return ($notice->verb == ActivityVerb::POST) && in_array($notice->object_type, $types);
182 * Check if a given ActivityStreams activity should be handled by this
185 * The default implementation checks against the activity type list
186 * returned by $this->types(), and requires that exactly one matching
187 * object be present. You can override this method to expand
188 * your checks or to compare the activity's verb, etc.
190 * @param Activity $activity
193 function isMyActivity($activity) {
194 $types = $this->types();
195 return (count($activity->objects) == 1 &&
196 ($activity->objects[0] instanceof ActivityObject) &&
197 ($activity->verb == ActivityVerb::POST) &&
198 in_array($activity->objects[0]->type, $types));
202 * Called when generating Atom XML ActivityStreams output from an
203 * ActivityObject belonging to this plugin. Gives the plugin
204 * a chance to add custom output.
206 * Note that you can only add output of additional XML elements,
207 * not change existing stuff here.
209 * If output is already handled by the base Activity classes,
210 * you can leave this base implementation as a no-op.
212 * @param ActivityObject $obj
213 * @param XMLOutputter $out to add elements at end of object
215 function activityObjectOutputAtom(ActivityObject $obj, XMLOutputter $out)
217 // default is a no-op
221 * Called when generating JSON ActivityStreams output from an
222 * ActivityObject belonging to this plugin. Gives the plugin
223 * a chance to add custom output.
225 * Modify the array contents to your heart's content, and it'll
226 * all get serialized out as JSON.
228 * If output is already handled by the base Activity classes,
229 * you can leave this base implementation as a no-op.
231 * @param ActivityObject $obj
232 * @param array &$out JSON-targeted array which can be modified
234 public function activityObjectOutputJson(ActivityObject $obj, array &$out)
236 // default is a no-op
240 * When a notice is deleted, delete the related objects
241 * by calling the overridable $this->deleteRelated().
243 * @param Notice $notice Notice being deleted
245 * @return boolean hook value
247 function onNoticeDeleteRelated($notice)
249 if ($this->isMyNotice($notice)) {
250 $this->deleteRelated($notice);
257 * Output the HTML for this kind of object in a list
259 * @param NoticeListItem $nli The list item being shown.
261 * @return boolean hook value
263 * @fixme WARNING WARNING WARNING this closes a 'div' that is implicitly opened in BookmarkPlugin's showNotice implementation
265 function onStartShowNoticeItem($nli)
267 if (!$this->isMyNotice($nli->notice)) {
271 $adapter = $this->adaptNoticeListItem($nli);
273 if (!empty($adapter)) {
274 $adapter->showNotice();
275 $adapter->showNoticeAttachments();
276 $adapter->showNoticeInfo();
277 $adapter->showNoticeOptions();
279 $this->oldShowNotice($nli);
286 * Given a notice list item, returns an adapter specific
289 * @param NoticeListItem $nli item to adapt
291 * @return NoticeListItemAdapter adapter or null
293 function adaptNoticeListItem($nli)
298 function oldShowNotice($nli)
301 $notice = $nli->notice;
304 $this->showNotice($notice, $out);
305 } catch (Exception $e) {
306 common_log(LOG_ERR, $e->getMessage());
308 $out->elementStart('div');
313 $nli->showNoticeLink();
314 $nli->showNoticeSource();
315 $nli->showNoticeLocation();
319 $out->elementEnd('div');
321 $nli->showNoticeOptions();
325 * Render a notice as one of our objects
327 * @param Notice $notice Notice to render
328 * @param ActivityObject &$object Empty object to fill
330 * @return boolean hook value
332 function onStartActivityObjectFromNotice($notice, &$object)
334 if ($this->isMyNotice($notice)) {
335 $object = $this->activityObjectFromNotice($notice);
343 * Handle a posted object from PuSH
345 * @param Activity $activity activity to handle
346 * @param Ostatus_profile $oprofile Profile for the feed
348 * @return boolean hook value
350 function onStartHandleFeedEntryWithProfile($activity, $oprofile, &$notice)
352 if ($this->isMyActivity($activity)) {
354 $actor = $oprofile->checkAuthorship($activity);
357 // TRANS: Client exception thrown when no author for an activity was found.
358 throw new ClientException(_('Cannot get author for activity.'));
361 $object = $activity->objects[0];
363 $options = array('uri' => $object->id,
364 'url' => $object->link,
365 'is_local' => Notice::REMOTE,
366 'source' => 'ostatus');
368 // $actor is an ostatus_profile
369 $notice = $this->saveNoticeFromActivity($activity, $actor->localProfile(), $options);
378 * Handle a posted object from Salmon
380 * @param Activity $activity activity to handle
381 * @param mixed $target user or group targeted
383 * @return boolean hook value
386 function onStartHandleSalmonTarget($activity, $target)
388 if ($this->isMyActivity($activity)) {
389 $this->log(LOG_INFO, "Checking {$activity->id} as a valid Salmon slap.");
391 if ($target instanceof User_group) {
392 $uri = $target->getUri();
393 if (!array_key_exists($uri, $activity->context->attention)) {
394 // @todo FIXME: please document (i18n).
395 // TRANS: Client exception thrown when ...
396 throw new ClientException(_('Object not posted to this group.'));
398 } else if ($target instanceof User) {
401 if (!empty($activity->context->replyToID)) {
402 $original = Notice::getKV('uri',
403 $activity->context->replyToID);
405 if (!array_key_exists($uri, $activity->context->attention) &&
407 $original->profile_id != $target->id)) {
408 // @todo FIXME: Please document (i18n).
409 // TRANS: Client exception when ...
410 throw new ClientException(_('Object not posted to this user.'));
413 // TRANS: Server exception thrown when a micro app plugin uses a target that cannot be handled.
414 throw new ServerException(_('Do not know how to handle this kind of target.'));
417 $actor = Ostatus_profile::ensureActivityObjectProfile($activity->actor);
419 $object = $activity->objects[0];
421 $options = array('uri' => $object->id,
422 'url' => $object->link,
423 'is_local' => Notice::REMOTE,
424 'source' => 'ostatus');
426 // $actor is an ostatus_profile
427 $this->saveNoticeFromActivity($activity, $actor->localProfile(), $options);
436 * Handle object posted via AtomPub
438 * @param Activity &$activity Activity that was posted
439 * @param User $user User that posted it
440 * @param Notice &$notice Resulting notice
442 * @return boolean hook value
444 function onStartAtomPubNewActivity(&$activity, $user, &$notice)
446 if ($this->isMyActivity($activity)) {
448 $options = array('source' => 'atompub');
450 // $user->getProfile() is a Profile
451 $notice = $this->saveNoticeFromActivity($activity,
462 * Handle object imported from a backup file
464 * @param User $user User to import for
465 * @param ActivityObject $author Original author per import file
466 * @param Activity $activity Activity to import
467 * @param boolean $trusted Is this a trusted user?
468 * @param boolean &$done Is this done (success or unrecoverable error)
470 * @return boolean hook value
472 function onStartImportActivity($user, $author, $activity, $trusted, &$done)
474 if ($this->isMyActivity($activity)) {
476 $obj = $activity->objects[0];
478 $options = array('uri' => $object->id,
479 'url' => $object->link,
480 'source' => 'restore');
482 // $user->getProfile() is a Profile
483 $saved = $this->saveNoticeFromActivity($activity,
487 if (!empty($saved)) {
498 * Event handler gives the plugin a chance to add custom
499 * Atom XML ActivityStreams output from a previously filled-out
502 * The atomOutput method is called if it's one of
503 * our matching types.
505 * @param ActivityObject $obj
506 * @param XMLOutputter $out to add elements at end of object
507 * @return boolean hook return value
509 function onEndActivityObjectOutputAtom(ActivityObject $obj, XMLOutputter $out)
511 if (in_array($obj->type, $this->types())) {
512 $this->activityObjectOutputAtom($obj, $out);
518 * Event handler gives the plugin a chance to add custom
519 * JSON ActivityStreams output from a previously filled-out
522 * The activityObjectOutputJson method is called if it's one of
523 * our matching types.
525 * @param ActivityObject $obj
526 * @param array &$out JSON-targeted array which can be modified
527 * @return boolean hook return value
529 function onEndActivityObjectOutputJson(ActivityObject $obj, array &$out)
531 if (in_array($obj->type, $this->types())) {
532 $this->activityObjectOutputJson($obj, $out);
537 function onStartShowEntryForms(&$tabs)
539 $tabs[$this->tag()] = $this->appTitle();
543 function onStartMakeEntryForm($tag, $out, &$form)
545 if ($tag == $this->tag()) {
546 $form = $this->entryForm($out);
553 function showNotice($notice, $out)
555 // TRANS: Server exception thrown when a micro app plugin developer has not done his job too well.
556 throw new ServerException(_('You must implement either adaptNoticeListItem() or showNotice().'));