classes/Subscription.php

   1 <?php
   2 /*
   3  * StatusNet - the distributed open-source microblogging tool
   4  * Copyright (C) 2008, 2009, StatusNet, Inc.
   5  *
   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.
  10  *
  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.
  15  *
  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/>.
  18  */
  19
  20 if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
  21
  22 /**
  23  * Table Definition for subscription
  24  */
  25 require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
  26
  27 class Subscription extends Memcached_DataObject
  28 {
  29     ###START_AUTOCODE
  30     /* the code below is auto generated do not remove the above tag */
  31
  32     public $__table = 'subscription';                    // table name
  33     public $subscriber;                      // int(4)  primary_key not_null
  34     public $subscribed;                      // int(4)  primary_key not_null
  35     public $jabber;                          // tinyint(1)   default_1
  36     public $sms;                             // tinyint(1)   default_1
  37     public $token;                           // varchar(255)
  38     public $secret;                          // varchar(255)
  39     public $created;                         // datetime()   not_null
  40     public $modified;                        // timestamp()   not_null default_CURRENT_TIMESTAMP
  41
  42     /* Static get */
  43     function staticGet($k,$v=null)
  44     { return Memcached_DataObject::staticGet('Subscription',$k,$v); }
  45
  46     /* the code above is auto generated do not remove the tag below */
  47     ###END_AUTOCODE
  48
  49     function pkeyGet($kv)
  50     {
  51         return Memcached_DataObject::pkeyGet('Subscription', $kv);
  52     }
  53
  54     /**
  55      * Make a new subscription
  56      *
  57      * @param Profile $subscriber party to receive new notices
  58      * @param Profile $other      party sending notices; publisher
  59      *
  60      * @return Subscription new subscription
  61      */
  62
  63     static function start($subscriber, $other)
  64     {
  65         // @fixme should we enforce this as profiles in callers instead?
  66         if ($subscriber instanceof User) {
  67             $subscriber = $subscriber->getProfile();
  68         }
  69         if ($other instanceof User) {
  70             $other = $other->getProfile();
  71         }
  72
  73         if (!$subscriber->hasRight(Right::SUBSCRIBE)) {
  74             // TRANS: Exception thrown when trying to subscribe while being banned from subscribing.
  75             throw new Exception(_('You have been banned from subscribing.'));
  76         }
  77
  78         if (self::exists($subscriber, $other)) {
  79             // TRANS: Exception thrown when trying to subscribe while already subscribed.
  80             throw new Exception(_('Already subscribed!'));
  81         }
  82
  83         if ($other->hasBlocked($subscriber)) {
  84             // TRANS: Exception thrown when trying to subscribe to a user who has blocked the subscribing user.
  85             throw new Exception(_('User has blocked you.'));
  86         }
  87
  88         if (Event::handle('StartSubscribe', array($subscriber, $other))) {
  89             $sub = self::saveNew($subscriber->id, $other->id);
  90             $sub->notify();
  91
  92             self::blow('user:notices_with_friends:%d', $subscriber->id);
  93
  94             $subscriber->blowSubscriptionCount();
  95             $other->blowSubscriberCount();
  96
  97             $otherUser = User::staticGet('id', $other->id);
  98
  99             if (!empty($otherUser) &&
 100                 $otherUser->autosubscribe &&
 101                 !self::exists($other, $subscriber) &&
 102                 !$subscriber->hasBlocked($other)) {
 103
 104                 try {
 105                     self::start($other, $subscriber);
 106                 } catch (Exception $e) {
 107                     common_log(LOG_ERR, "Exception during autosubscribe of {$other->nickname} to profile {$subscriber->id}: {$e->getMessage()}");
 108                 }
 109             }
 110
 111             Event::handle('EndSubscribe', array($subscriber, $other));
 112         }
 113
 114         return true;
 115     }
 116
 117     /**
 118      * Low-level subscription save.
 119      * Outside callers should use Subscription::start()
 120      */
 121     protected function saveNew($subscriber_id, $other_id)
 122     {
 123         $sub = new Subscription();
 124
 125         $sub->subscriber = $subscriber_id;
 126         $sub->subscribed = $other_id;
 127         $sub->jabber     = 1;
 128         $sub->sms        = 1;
 129         $sub->created    = common_sql_now();
 130
 131         $result = $sub->insert();
 132
 133         if (!$result) {
 134             common_log_db_error($sub, 'INSERT', __FILE__);
 135             // TRANS: Exception thrown when a subscription could not be stored on the server.
 136             throw new Exception(_('Could not save subscription.'));
 137         }
 138
 139         return $sub;
 140     }
 141
 142     function notify()
 143     {
 144         # XXX: add other notifications (Jabber, SMS) here
 145         # XXX: queue this and handle it offline
 146         # XXX: Whatever happens, do it in Twitter-like API, too
 147
 148         $this->notifyEmail();
 149     }
 150
 151     function notifyEmail()
 152     {
 153         $subscribedUser = User::staticGet('id', $this->subscribed);
 154
 155         if (!empty($subscribedUser)) {
 156
 157             $subscriber = Profile::staticGet('id', $this->subscriber);
 158
 159             mail_subscribe_notify_profile($subscribedUser, $subscriber);
 160         }
 161     }
 162
 163     /**
 164      * Cancel a subscription
 165      *
 166      */
 167     function cancel($subscriber, $other)
 168     {
 169         if (!self::exists($subscriber, $other)) {
 170             // TRANS: Exception thrown when trying to unsibscribe without a subscription.
 171             throw new Exception(_('Not subscribed!'));
 172         }
 173
 174         // Don't allow deleting self subs
 175
 176         if ($subscriber->id == $other->id) {
 177             // TRANS: Exception thrown when trying to unsubscribe a user from themselves.
 178             throw new Exception(_('Could not delete self-subscription.'));
 179         }
 180
 181         if (Event::handle('StartUnsubscribe', array($subscriber, $other))) {
 182
 183             $sub = Subscription::pkeyGet(array('subscriber' => $subscriber->id,
 184                                                'subscribed' => $other->id));
 185
 186             // note we checked for existence above
 187
 188             assert(!empty($sub));
 189
 190             // @todo: move this block to EndSubscribe handler for
 191             // OMB plugin when it exists.
 192
 193             if (!empty($sub->token)) {
 194
 195                 $token = new Token();
 196
 197                 $token->tok    = $sub->token;
 198
 199                 if ($token->find(true)) {
 200
 201                     $result = $token->delete();
 202
 203                     if (!$result) {
 204                         common_log_db_error($token, 'DELETE', __FILE__);
 205                         // TRANS: Exception thrown when the OMB token for a subscription could not deleted on the server.
 206                         throw new Exception(_('Could not delete subscription OMB token.'));
 207                     }
 208                 } else {
 209                     common_log(LOG_ERR, "Couldn't find credentials with token {$token->tok}");
 210                 }
 211             }
 212
 213             $result = $sub->delete();
 214
 215             if (!$result) {
 216                 common_log_db_error($sub, 'DELETE', __FILE__);
 217                 // TRANS: Exception thrown when a subscription could not be deleted on the server.
 218                 throw new Exception(_('Could not delete subscription.'));
 219             }
 220
 221             self::blow('user:notices_with_friends:%d', $subscriber->id);
 222
 223             $subscriber->blowSubscriptionCount();
 224             $other->blowSubscriberCount();
 225
 226             Event::handle('EndUnsubscribe', array($subscriber, $other));
 227         }
 228
 229         return;
 230     }
 231
 232     function exists($subscriber, $other)
 233     {
 234         $sub = Subscription::pkeyGet(array('subscriber' => $subscriber->id,
 235                                            'subscribed' => $other->id));
 236         return (empty($sub)) ? false : true;
 237     }
 238
 239     function asActivity()
 240     {
 241         $subscriber = Profile::staticGet('id', $this->subscriber);
 242         $subscribed = Profile::staticGet('id', $this->subscribed);
 243
 244         $act = new Activity();
 245
 246         $act->verb = ActivityVerb::FOLLOW;
 247
 248         $act->id   = TagURI::mint('follow:%d:%d:%s',
 249                                   $subscriber->id,
 250                                   $subscribed->id,
 251                                   common_date_iso8601($this->created));
 252
 253         $act->time    = strtotime($this->created);
 254         $act->title   = _("Follow");
 255         $act->content = sprintf(_("%s is now following %s."),
 256                                $subscriber->getBestName(),
 257                                $subscribed->getBestName());
 258
 259         $act->actor   = ActivityObject::fromProfile($subscriber);
 260         $act->object  = ActivityObject::fromProfile($subscribed);
 261
 262         return $act;
 263     }
 264 }