3 * StatusNet - the distributed open-source microblogging tool
4 * Copyright (C) 2008, 2009, StatusNet, Inc.
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU Affero General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Affero General Public License for more details.
16 * You should have received a copy of the GNU Affero General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 if (!defined('GNUSOCIAL')) { exit(1); }
23 * Table Definition for subscription
25 class Subscription extends Managed_DataObject
27 const CACHE_WINDOW = 201;
30 public $__table = 'subscription'; // table name
31 public $subscriber; // int(4) primary_key not_null
32 public $subscribed; // int(4) primary_key not_null
33 public $jabber; // tinyint(1) default_1
34 public $sms; // tinyint(1) default_1
35 public $token; // varchar(191) not 255 because utf8mb4 takes more space
36 public $secret; // varchar(191) not 255 because utf8mb4 takes more space
37 public $uri; // varchar(191) not 255 because utf8mb4 takes more space
38 public $created; // datetime() not_null
39 public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
41 public static function schemaDef()
45 'subscriber' => array('type' => 'int', 'not null' => true, 'description' => 'profile listening'),
46 'subscribed' => array('type' => 'int', 'not null' => true, 'description' => 'profile being listened to'),
47 'jabber' => array('type' => 'int', 'size' => 'tiny', 'default' => 1, 'description' => 'deliver jabber messages'),
48 'sms' => array('type' => 'int', 'size' => 'tiny', 'default' => 1, 'description' => 'deliver sms messages'),
49 'token' => array('type' => 'varchar', 'length' => 191, 'description' => 'authorization token'),
50 'secret' => array('type' => 'varchar', 'length' => 191, 'description' => 'token secret'),
51 'uri' => array('type' => 'varchar', 'length' => 191, 'description' => 'universally unique identifier'),
52 'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'),
53 'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
55 'primary key' => array('subscriber', 'subscribed'),
56 'unique keys' => array(
57 'subscription_uri_key' => array('uri'),
60 'subscription_subscriber_idx' => array('subscriber', 'created'),
61 'subscription_subscribed_idx' => array('subscribed', 'created'),
62 'subscription_token_idx' => array('token'),
68 * Make a new subscription
70 * @param Profile $subscriber party to receive new notices
71 * @param Profile $other party sending notices; publisher
72 * @param bool $force pass Subscription::FORCE to override local subscription approval
74 * @return mixed Subscription or Subscription_queue: new subscription info
77 static function start(Profile $subscriber, Profile $other, $force=false)
79 if (!$subscriber->hasRight(Right::SUBSCRIBE)) {
80 // TRANS: Exception thrown when trying to subscribe while being banned from subscribing.
81 throw new Exception(_('You have been banned from subscribing.'));
84 if (self::exists($subscriber, $other)) {
85 // TRANS: Exception thrown when trying to subscribe while already subscribed.
86 throw new AlreadyFulfilledException(_('Already subscribed!'));
89 if ($other->hasBlocked($subscriber)) {
90 // TRANS: Exception thrown when trying to subscribe to a user who has blocked the subscribing user.
91 throw new Exception(_('User has blocked you.'));
94 if (Event::handle('StartSubscribe', array($subscriber, $other))) {
95 // unless subscription is forced, the user policy for subscription approvals is tested
96 if (!$force && $other->requiresSubscriptionApproval($subscriber)) {
98 $sub = Subscription_queue::saveNew($subscriber, $other);
100 } catch (AlreadyFulfilledException $e) {
101 $sub = Subscription_queue::getSubQueue($subscriber, $other);
104 $otherUser = User::getKV('id', $other->id);
105 $sub = self::saveNew($subscriber, $other);
108 self::blow('user:notices_with_friends:%d', $subscriber->id);
110 self::blow('subscription:by-subscriber:'.$subscriber->id);
111 self::blow('subscription:by-subscribed:'.$other->id);
113 $subscriber->blowSubscriptionCount();
114 $other->blowSubscriberCount();
116 if ($otherUser instanceof User &&
117 $otherUser->autosubscribe &&
118 !self::exists($other, $subscriber) &&
119 !$subscriber->hasBlocked($other)) {
122 self::start($other, $subscriber);
123 } catch (AlreadyFulfilledException $e) {
124 // This shouldn't happen due to !self::exists above
125 common_debug('Tried to autosubscribe a user to its new subscriber.');
126 } catch (Exception $e) {
127 common_log(LOG_ERR, "Exception during autosubscribe of {$other->nickname} to profile {$subscriber->id}: {$e->getMessage()}");
132 if ($sub instanceof Subscription) { // i.e. not Subscription_queue
133 Event::handle('EndSubscribe', array($subscriber, $other));
140 static function ensureStart(Profile $subscriber, Profile $other, $force=false)
143 $sub = self::start($subscriber, $other, $force);
144 } catch (AlreadyFulfilledException $e) {
145 return self::getSubscription($subscriber, $other);
151 * Low-level subscription save.
152 * Outside callers should use Subscription::start()
154 protected static function saveNew(Profile $subscriber, Profile $other)
156 $sub = new Subscription();
158 $sub->subscriber = $subscriber->getID();
159 $sub->subscribed = $other->getID();
162 $sub->created = common_sql_now();
163 $sub->uri = self::newUri($subscriber,
167 $result = $sub->insert();
169 if ($result===false) {
170 common_log_db_error($sub, 'INSERT', __FILE__);
171 // TRANS: Exception thrown when a subscription could not be stored on the server.
172 throw new Exception(_('Could not save subscription.'));
180 // XXX: add other notifications (Jabber, SMS) here
181 // XXX: queue this and handle it offline
182 // XXX: Whatever happens, do it in Twitter-like API, too
184 $this->notifyEmail();
187 function notifyEmail()
189 $subscribedUser = User::getKV('id', $this->subscribed);
191 if ($subscribedUser instanceof User) {
193 $subscriber = Profile::getKV('id', $this->subscriber);
195 mail_subscribe_notify_profile($subscribedUser, $subscriber);
200 * Cancel a subscription
203 static function cancel(Profile $subscriber, Profile $other)
205 if (!self::exists($subscriber, $other)) {
206 // TRANS: Exception thrown when trying to unsibscribe without a subscription.
207 throw new AlreadyFulfilledException(_('Not subscribed!'));
210 // Don't allow deleting self subs
212 if ($subscriber->id == $other->id) {
213 // TRANS: Exception thrown when trying to unsubscribe a user from themselves.
214 throw new Exception(_('Could not delete self-subscription.'));
217 if (Event::handle('StartUnsubscribe', array($subscriber, $other))) {
219 $sub = Subscription::pkeyGet(array('subscriber' => $subscriber->id,
220 'subscribed' => $other->id));
222 // note we checked for existence above
224 assert(!empty($sub));
226 $result = $sub->delete();
229 common_log_db_error($sub, 'DELETE', __FILE__);
230 // TRANS: Exception thrown when a subscription could not be deleted on the server.
231 throw new Exception(_('Could not delete subscription.'));
234 self::blow('user:notices_with_friends:%d', $subscriber->id);
236 self::blow('subscription:by-subscriber:'.$subscriber->id);
237 self::blow('subscription:by-subscribed:'.$other->id);
239 $subscriber->blowSubscriptionCount();
240 $other->blowSubscriberCount();
242 Event::handle('EndUnsubscribe', array($subscriber, $other));
248 static function exists(Profile $subscriber, Profile $other)
251 $sub = self::getSubscription($subscriber, $other);
252 } catch (NoResultException $e) {
259 static function getSubscription(Profile $subscriber, Profile $other)
261 // This is essentially a pkeyGet but we have an object to return in NoResultException
262 $sub = new Subscription();
263 $sub->subscriber = $subscriber->id;
264 $sub->subscribed = $other->id;
265 if (!$sub->find(true)) {
266 throw new NoResultException($sub);
271 public function getSubscriber()
273 return Profile::getByID($this->subscriber);
276 public function getSubscribed()
278 return Profile::getByID($this->subscribed);
281 function asActivity()
283 $subscriber = $this->getSubscriber();
284 $subscribed = $this->getSubscribed();
286 $act = new Activity();
288 $act->verb = ActivityVerb::FOLLOW;
290 // XXX: rationalize this with the URL
292 $act->id = $this->getUri();
294 $act->time = strtotime($this->created);
295 // TRANS: Activity title when subscribing to another person.
296 $act->title = _m('TITLE','Follow');
297 // TRANS: Notification given when one person starts following another.
298 // TRANS: %1$s is the subscriber, %2$s is the subscribed.
299 $act->content = sprintf(_('%1$s is now following %2$s.'),
300 $subscriber->getBestName(),
301 $subscribed->getBestName());
303 $act->actor = $subscriber->asActivityObject();
304 $act->objects[] = $subscribed->asActivityObject();
306 $url = common_local_url('AtomPubShowSubscription',
307 array('subscriber' => $subscriber->id,
308 'subscribed' => $subscribed->id));
310 $act->selfLink = $url;
311 $act->editLink = $url;
317 * Stream of subscriptions with the same subscriber
319 * Useful for showing pages that list subscriptions in reverse
320 * chronological order. Has offset & limit to make paging
323 * @param integer $profile_id ID of the subscriber profile
324 * @param integer $offset Offset from latest
325 * @param integer $limit Maximum number to fetch
327 * @return Subscription stream of subscriptions; use fetch() to iterate
329 public static function bySubscriber($profile_id, $offset = 0, $limit = PROFILES_PER_PAGE)
331 // "by subscriber" means it is the list of subscribed users we want
332 $ids = self::getSubscribedIDs($profile_id, $offset, $limit);
333 return Subscription::listFind('subscribed', $ids);
337 * Stream of subscriptions with the same subscriber
339 * Useful for showing pages that list subscriptions in reverse
340 * chronological order. Has offset & limit to make paging
343 * @param integer $profile_id ID of the subscribed profile
344 * @param integer $offset Offset from latest
345 * @param integer $limit Maximum number to fetch
347 * @return Subscription stream of subscriptions; use fetch() to iterate
349 public static function bySubscribed($profile_id, $offset = 0, $limit = PROFILES_PER_PAGE)
351 // "by subscribed" means it is the list of subscribers we want
352 $ids = self::getSubscriberIDs($profile_id, $offset, $limit);
353 return Subscription::listFind('subscriber', $ids);
357 // The following are helper functions to the subscription lists,
358 // notably the public ones get used in places such as Profile
359 public static function getSubscribedIDs($profile_id, $offset, $limit) {
360 return self::getSubscriptionIDs('subscribed', $profile_id, $offset, $limit);
363 public static function getSubscriberIDs($profile_id, $offset, $limit) {
364 return self::getSubscriptionIDs('subscriber', $profile_id, $offset, $limit);
367 private static function getSubscriptionIDs($get_type, $profile_id, $offset, $limit)
371 $by_type = 'subscriber';
374 $by_type = 'subscribed';
377 throw new Exception('Bad type argument to getSubscriptionIDs');
380 $cacheKey = 'subscription:by-'.$by_type.':'.$profile_id;
382 $queryoffset = $offset;
383 $querylimit = $limit;
385 if ($offset + $limit <= self::CACHE_WINDOW) {
386 // Oh, it seems it should be cached
387 $ids = self::cacheGet($cacheKey);
388 if (is_array($ids)) {
389 return array_slice($ids, $offset, $limit);
391 // Being here indicates we didn't find anything cached
392 // so we'll have to fill it up simultaneously
394 $querylimit = self::CACHE_WINDOW;
397 $sub = new Subscription();
398 $sub->$by_type = $profile_id;
399 $sub->selectAdd($get_type);
400 $sub->whereAdd("{$get_type} != {$profile_id}");
401 $sub->orderBy('created DESC');
402 $sub->limit($queryoffset, $querylimit);
408 $ids = $sub->fetchAll($get_type);
410 // If we're simultaneously filling up cache, remember to slice
411 if ($queryoffset === 0 && $querylimit === self::CACHE_WINDOW) {
412 self::cacheSet($cacheKey, $ids);
413 return array_slice($ids, $offset, $limit);
420 * Flush cached subscriptions when subscription is updated
422 * Because we cache subscriptions, it's useful to flush them
425 * @param mixed $dataObject Original version of object
427 * @return boolean success flag.
429 function update($dataObject=false)
431 self::blow('subscription:by-subscriber:'.$this->subscriber);
432 self::blow('subscription:by-subscribed:'.$this->subscribed);
434 return parent::update($dataObject);
437 public function getUri()
439 return $this->uri ?: self::newUri($this->getSubscriber(), $this->getSubscribed(), $this->created);