+
+ /**
+ * Make a new subscription
+ *
+ * @param Profile $subscriber party to receive new notices
+ * @param Profile $other party sending notices; publisher
+ *
+ * @return Subscription new subscription
+ */
+
+ static function start($subscriber, $other)
+ {
+ if (!$subscriber->hasRight(Right::SUBSCRIBE)) {
+ throw new Exception(_('You have been banned from subscribing.'));
+ }
+
+ if (self::exists($subscriber, $other)) {
+ throw new Exception(_('Already subscribed!'));
+ }
+
+ if ($other->hasBlocked($subscriber)) {
+ throw new Exception(_('User has blocked you.'));
+ }
+
+ if (Event::handle('StartSubscribe', array($subscriber, $other))) {
+
+ $sub = new Subscription();
+
+ $sub->subscriber = $subscriber->id;
+ $sub->subscribed = $other->id;
+ $sub->created = common_sql_now();
+
+ $result = $sub->insert();
+
+ if (!$result) {
+ common_log_db_error($sub, 'INSERT', __FILE__);
+ throw new Exception(_('Could not save subscription.'));
+ }
+
+ $sub->notify();
+
+ self::blow('user:notices_with_friends:%d', $subscriber->id);
+
+ $subscriber->blowSubscriptionsCount();
+ $other->blowSubscribersCount();
+
+ $otherUser = User::staticGet('id', $other->id);
+
+ if (!empty($otherUser) &&
+ $otherUser->autosubscribe &&
+ !self::exists($other, $subscriber) &&
+ !$subscriber->hasBlocked($other)) {
+
+ $auto = new Subscription();
+
+ $auto->subscriber = $subscriber->id;
+ $auto->subscribed = $other->id;
+ $auto->created = common_sql_now();
+
+ $result = $auto->insert();
+
+ if (!$result) {
+ common_log_db_error($auto, 'INSERT', __FILE__);
+ throw new Exception(_('Could not save subscription.'));
+ }
+
+ $auto->notify();
+ }
+
+ Event::handle('EndSubscribe', array($subscriber, $other));
+ }
+
+ return true;
+ }
+
+ function notify()
+ {
+ # XXX: add other notifications (Jabber, SMS) here
+ # XXX: queue this and handle it offline
+ # XXX: Whatever happens, do it in Twitter-like API, too
+
+ $this->notifyEmail();
+ }
+
+ function notifyEmail()
+ {
+ $subscribedUser = User::staticGet('id', $this->subscribed);
+
+ if (!empty($subscribedUser)) {
+
+ $subscriber = Profile::staticGet('id', $this->subscriber);
+
+ mail_subscribe_notify_profile($subscribedUser, $subscriber);
+ }
+ }
+
+ /**
+ * Cancel a subscription
+ *
+ */
+
+ function cancel($subscriber, $other)
+ {
+ if (!self::exists($subscriber, $other)) {
+ throw new Exception(_('Not subscribed!'));
+ }
+
+ // Don't allow deleting self subs
+
+ if ($subscriber->id == $other->id) {
+ throw new Exception(_('Couldn\'t delete self-subscription.'));
+ }
+
+ if (Event::handle('StartUnsubscribe', array($subscriber, $other))) {
+
+ $sub = Subscription::pkeyGet(array('subscriber' => $subscriber->id,
+ 'subscribed' => $other->id));
+
+ // note we checked for existence above
+
+ assert(!empty($sub));
+
+ $result = $sub->delete();
+
+ if (!$result) {
+ common_log_db_error($sub, 'DELETE', __FILE__);
+ throw new Exception(_('Couldn\'t delete subscription.'));
+ }
+
+ self::blow('user:notices_with_friends:%d', $subscriber->id);
+
+ $subscriber->blowSubscriptionsCount();
+ $other->blowSubscribersCount();
+
+ Event::handle('EndUnsubscribe', array($subscriber, $other));
+ }
+
+ return;
+ }
+
+ function exists($subscriber, $other)
+ {
+ $sub = Subscription::pkeyGet(array('subscriber' => $subscriber->id,
+ 'subscribed' => $other->id));
+ return (empty($sub)) ? false : true;
+ }