426 lines
14 KiB
PHP
426 lines
14 KiB
PHP
<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2008, 2009, StatusNet, 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('STATUSNET') && !defined('LACONICA')) { exit(1); }
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/**
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* Table Definition for subscription
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*/
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require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
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class Subscription extends Memcached_DataObject
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{
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const CACHE_WINDOW = 201;
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const FORCE = true;
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###START_AUTOCODE
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/* the code below is auto generated do not remove the above tag */
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public $__table = 'subscription'; // table name
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public $subscriber; // int(4) primary_key not_null
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public $subscribed; // int(4) primary_key not_null
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public $jabber; // tinyint(1) default_1
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public $sms; // tinyint(1) default_1
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public $token; // varchar(255)
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public $secret; // varchar(255)
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public $uri; // varchar(255)
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public $created; // datetime() not_null
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public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
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/* Static get */
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function staticGet($k,$v=null)
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{ return Memcached_DataObject::staticGet('Subscription',$k,$v); }
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/* the code above is auto generated do not remove the tag below */
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###END_AUTOCODE
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function pkeyGet($kv)
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{
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return Memcached_DataObject::pkeyGet('Subscription', $kv);
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}
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/**
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* Make a new subscription
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*
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* @param Profile $subscriber party to receive new notices
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* @param Profile $other party sending notices; publisher
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* @param bool $force pass Subscription::FORCE to override local subscription approval
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*
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* @return mixed Subscription or Subscription_queue: new subscription info
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*/
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static function start($subscriber, $other, $force=false)
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{
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// @fixme should we enforce this as profiles in callers instead?
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if ($subscriber instanceof User) {
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$subscriber = $subscriber->getProfile();
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}
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if ($other instanceof User) {
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$other = $other->getProfile();
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}
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if (!$subscriber->hasRight(Right::SUBSCRIBE)) {
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// TRANS: Exception thrown when trying to subscribe while being banned from subscribing.
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throw new Exception(_('You have been banned from subscribing.'));
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}
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if (self::exists($subscriber, $other)) {
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// TRANS: Exception thrown when trying to subscribe while already subscribed.
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throw new Exception(_('Already subscribed!'));
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}
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if ($other->hasBlocked($subscriber)) {
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// TRANS: Exception thrown when trying to subscribe to a user who has blocked the subscribing user.
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throw new Exception(_('User has blocked you.'));
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}
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if (Event::handle('StartSubscribe', array($subscriber, $other))) {
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$otherUser = User::staticGet('id', $other->id);
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if ($otherUser && $otherUser->subscribe_policy == User::SUBSCRIBE_POLICY_MODERATE && !$force) {
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$sub = Subscription_queue::saveNew($subscriber, $other);
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$sub->notify();
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} else {
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$sub = self::saveNew($subscriber->id, $other->id);
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$sub->notify();
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self::blow('user:notices_with_friends:%d', $subscriber->id);
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self::blow('subscription:by-subscriber:'.$subscriber->id);
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self::blow('subscription:by-subscribed:'.$other->id);
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$subscriber->blowSubscriptionCount();
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$other->blowSubscriberCount();
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if (!empty($otherUser) &&
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$otherUser->autosubscribe &&
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!self::exists($other, $subscriber) &&
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!$subscriber->hasBlocked($other)) {
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try {
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self::start($other, $subscriber);
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} catch (Exception $e) {
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common_log(LOG_ERR, "Exception during autosubscribe of {$other->nickname} to profile {$subscriber->id}: {$e->getMessage()}");
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}
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}
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}
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Event::handle('EndSubscribe', array($subscriber, $other));
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}
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return $sub;
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}
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/**
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* Low-level subscription save.
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* Outside callers should use Subscription::start()
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*/
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protected function saveNew($subscriber_id, $other_id)
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{
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$sub = new Subscription();
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$sub->subscriber = $subscriber_id;
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$sub->subscribed = $other_id;
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$sub->jabber = 1;
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$sub->sms = 1;
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$sub->created = common_sql_now();
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$sub->uri = self::newURI($sub->subscriber,
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$sub->subscribed,
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$sub->created);
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$result = $sub->insert();
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if (!$result) {
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common_log_db_error($sub, 'INSERT', __FILE__);
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// TRANS: Exception thrown when a subscription could not be stored on the server.
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throw new Exception(_('Could not save subscription.'));
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}
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return $sub;
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}
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function notify()
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{
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// XXX: add other notifications (Jabber, SMS) here
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// XXX: queue this and handle it offline
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// XXX: Whatever happens, do it in Twitter-like API, too
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$this->notifyEmail();
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}
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function notifyEmail()
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{
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$subscribedUser = User::staticGet('id', $this->subscribed);
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if (!empty($subscribedUser)) {
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$subscriber = Profile::staticGet('id', $this->subscriber);
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mail_subscribe_notify_profile($subscribedUser, $subscriber);
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}
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}
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/**
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* Cancel a subscription
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*
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*/
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function cancel($subscriber, $other)
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{
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if (!self::exists($subscriber, $other)) {
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// TRANS: Exception thrown when trying to unsibscribe without a subscription.
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throw new Exception(_('Not subscribed!'));
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}
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// Don't allow deleting self subs
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if ($subscriber->id == $other->id) {
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// TRANS: Exception thrown when trying to unsubscribe a user from themselves.
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throw new Exception(_('Could not delete self-subscription.'));
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}
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if (Event::handle('StartUnsubscribe', array($subscriber, $other))) {
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$sub = Subscription::pkeyGet(array('subscriber' => $subscriber->id,
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'subscribed' => $other->id));
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// note we checked for existence above
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assert(!empty($sub));
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$result = $sub->delete();
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if (!$result) {
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common_log_db_error($sub, 'DELETE', __FILE__);
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// TRANS: Exception thrown when a subscription could not be deleted on the server.
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throw new Exception(_('Could not delete subscription.'));
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}
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self::blow('user:notices_with_friends:%d', $subscriber->id);
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self::blow('subscription:by-subscriber:'.$subscriber->id);
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self::blow('subscription:by-subscribed:'.$other->id);
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$subscriber->blowSubscriptionCount();
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$other->blowSubscriberCount();
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Event::handle('EndUnsubscribe', array($subscriber, $other));
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}
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return;
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}
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function exists($subscriber, $other)
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{
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$sub = Subscription::pkeyGet(array('subscriber' => $subscriber->id,
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'subscribed' => $other->id));
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return (empty($sub)) ? false : true;
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}
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function asActivity()
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{
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$subscriber = Profile::staticGet('id', $this->subscriber);
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$subscribed = Profile::staticGet('id', $this->subscribed);
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$act = new Activity();
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$act->verb = ActivityVerb::FOLLOW;
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// XXX: rationalize this with the URL
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$act->id = $this->getURI();
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$act->time = strtotime($this->created);
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// TRANS: Activity title when subscribing to another person.
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$act->title = _m('TITLE','Follow');
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// TRANS: Notification given when one person starts following another.
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// TRANS: %1$s is the subscriber, %2$s is the subscribed.
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$act->content = sprintf(_('%1$s is now following %2$s.'),
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$subscriber->getBestName(),
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$subscribed->getBestName());
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$act->actor = ActivityObject::fromProfile($subscriber);
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$act->objects[] = ActivityObject::fromProfile($subscribed);
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$url = common_local_url('AtomPubShowSubscription',
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array('subscriber' => $subscriber->id,
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'subscribed' => $subscribed->id));
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$act->selfLink = $url;
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$act->editLink = $url;
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return $act;
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}
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/**
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* Stream of subscriptions with the same subscriber
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*
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* Useful for showing pages that list subscriptions in reverse
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* chronological order. Has offset & limit to make paging
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* easy.
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*
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* @param integer $subscriberId Profile ID of the subscriber
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* @param integer $offset Offset from latest
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* @param integer $limit Maximum number to fetch
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*
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* @return Subscription stream of subscriptions; use fetch() to iterate
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*/
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static function bySubscriber($subscriberId,
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$offset = 0,
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$limit = PROFILES_PER_PAGE)
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{
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if ($offset + $limit > self::CACHE_WINDOW) {
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return new ArrayWrapper(self::realBySubscriber($subscriberId,
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$offset,
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$limit));
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} else {
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$key = 'subscription:by-subscriber:'.$subscriberId;
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$window = self::cacheGet($key);
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if ($window === false) {
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$window = self::realBySubscriber($subscriberId,
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0,
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self::CACHE_WINDOW);
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self::cacheSet($key, $window);
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}
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return new ArrayWrapper(array_slice($window,
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$offset,
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$limit));
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}
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}
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private static function realBySubscriber($subscriberId,
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$offset,
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$limit)
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{
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$sub = new Subscription();
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$sub->subscriber = $subscriberId;
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$sub->whereAdd('subscribed != ' . $subscriberId);
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$sub->orderBy('created DESC');
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$sub->limit($offset, $limit);
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$sub->find();
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$subs = array();
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while ($sub->fetch()) {
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$subs[] = clone($sub);
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}
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return $subs;
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}
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/**
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* Stream of subscriptions with the same subscribed profile
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*
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* Useful for showing pages that list subscribers in reverse
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* chronological order. Has offset & limit to make paging
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* easy.
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*
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* @param integer $subscribedId Profile ID of the subscribed
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* @param integer $offset Offset from latest
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* @param integer $limit Maximum number to fetch
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*
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* @return Subscription stream of subscriptions; use fetch() to iterate
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*/
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static function bySubscribed($subscribedId,
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$offset = 0,
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$limit = PROFILES_PER_PAGE)
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{
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if ($offset + $limit > self::CACHE_WINDOW) {
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return new ArrayWrapper(self::realBySubscribed($subscribedId,
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$offset,
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$limit));
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} else {
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$key = 'subscription:by-subscribed:'.$subscribedId;
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$window = self::cacheGet($key);
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if ($window === false) {
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$window = self::realBySubscribed($subscribedId,
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0,
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self::CACHE_WINDOW);
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self::cacheSet($key, $window);
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}
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return new ArrayWrapper(array_slice($window,
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$offset,
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$limit));
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}
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}
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private static function realBySubscribed($subscribedId,
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$offset,
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$limit)
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{
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$sub = new Subscription();
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$sub->subscribed = $subscribedId;
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$sub->whereAdd('subscriber != ' . $subscribedId);
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$sub->orderBy('created DESC');
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$sub->limit($offset, $limit);
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$sub->find();
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$subs = array();
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while ($sub->fetch()) {
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$subs[] = clone($sub);
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}
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return $subs;
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}
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/**
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* Flush cached subscriptions when subscription is updated
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*
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* Because we cache subscriptions, it's useful to flush them
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* here.
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*
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* @param mixed $orig Original version of object
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*
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* @return boolean success flag.
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*/
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function update($orig=null)
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{
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$result = parent::update($orig);
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self::blow('subscription:by-subscriber:'.$this->subscriber);
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self::blow('subscription:by-subscribed:'.$this->subscribed);
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return $result;
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}
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function getURI()
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{
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if (!empty($this->uri)) {
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return $this->uri;
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} else {
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return self::newURI($this->subscriber, $this->subscribed, $this->created);
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}
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}
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static function newURI($subscriber_id, $subscribed_id, $created)
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{
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return TagURI::mint('follow:%d:%d:%s',
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$subscriber_id,
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$subscribed_id,
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common_date_iso8601($created));
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}
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}
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