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gnu-social/classes/Subscription.php

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<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2008, 2009, StatusNet, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
/**
* Table Definition for subscription
*/
require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
class Subscription extends Managed_DataObject
{
const CACHE_WINDOW = 201;
const FORCE = true;
###START_AUTOCODE
/* the code below is auto generated do not remove the above tag */
public $__table = 'subscription'; // table name
public $subscriber; // int(4) primary_key not_null
public $subscribed; // int(4) primary_key not_null
public $jabber; // tinyint(1) default_1
public $sms; // tinyint(1) default_1
public $token; // varchar(255)
public $secret; // varchar(255)
public $uri; // varchar(255)
public $created; // datetime() not_null
public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
public static function schemaDef()
{
return array(
'fields' => array(
'subscriber' => array('type' => 'int', 'not null' => true, 'description' => 'profile listening'),
'subscribed' => array('type' => 'int', 'not null' => true, 'description' => 'profile being listened to'),
'jabber' => array('type' => 'int', 'size' => 'tiny', 'default' => 1, 'description' => 'deliver jabber messages'),
'sms' => array('type' => 'int', 'size' => 'tiny', 'default' => 1, 'description' => 'deliver sms messages'),
'token' => array('type' => 'varchar', 'length' => 255, 'description' => 'authorization token'),
'secret' => array('type' => 'varchar', 'length' => 255, 'description' => 'token secret'),
'uri' => array('type' => 'varchar', 'length' => 255, 'description' => 'universally unique identifier'),
'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'),
'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
),
'primary key' => array('subscriber', 'subscribed'),
'unique keys' => array(
'subscription_uri_key' => array('uri'),
),
'indexes' => array(
'subscription_subscriber_idx' => array('subscriber', 'created'),
'subscription_subscribed_idx' => array('subscribed', 'created'),
'subscription_token_idx' => array('token'),
),
);
}
/**
* Make a new subscription
*
* @param Profile $subscriber party to receive new notices
* @param Profile $other party sending notices; publisher
* @param bool $force pass Subscription::FORCE to override local subscription approval
*
* @return mixed Subscription or Subscription_queue: new subscription info
*/
static function start(Profile $subscriber, Profile $other, $force=false)
{
if (!$subscriber->hasRight(Right::SUBSCRIBE)) {
// TRANS: Exception thrown when trying to subscribe while being banned from subscribing.
throw new Exception(_('You have been banned from subscribing.'));
}
if (self::exists($subscriber, $other)) {
// TRANS: Exception thrown when trying to subscribe while already subscribed.
throw new Exception(_('Already subscribed!'));
}
if ($other->hasBlocked($subscriber)) {
// TRANS: Exception thrown when trying to subscribe to a user who has blocked the subscribing user.
throw new Exception(_('User has blocked you.'));
}
if (Event::handle('StartSubscribe', array($subscriber, $other))) {
$otherUser = User::getKV('id', $other->id);
if ($otherUser && $otherUser->subscribe_policy == User::SUBSCRIBE_POLICY_MODERATE && !$force) {
$sub = Subscription_queue::saveNew($subscriber, $other);
$sub->notify();
} else {
$sub = self::saveNew($subscriber->id, $other->id);
$sub->notify();
self::blow('user:notices_with_friends:%d', $subscriber->id);
self::blow('subscription:by-subscriber:'.$subscriber->id);
self::blow('subscription:by-subscribed:'.$other->id);
$subscriber->blowSubscriptionCount();
$other->blowSubscriberCount();
if (!empty($otherUser) &&
$otherUser->autosubscribe &&
!self::exists($other, $subscriber) &&
!$subscriber->hasBlocked($other)) {
try {
self::start($other, $subscriber);
} catch (Exception $e) {
common_log(LOG_ERR, "Exception during autosubscribe of {$other->nickname} to profile {$subscriber->id}: {$e->getMessage()}");
}
}
}
Event::handle('EndSubscribe', array($subscriber, $other));
}
return $sub;
}
/**
* Low-level subscription save.
* Outside callers should use Subscription::start()
*/
protected function saveNew($subscriber_id, $other_id)
{
$sub = new Subscription();
$sub->subscriber = $subscriber_id;
$sub->subscribed = $other_id;
$sub->jabber = 1;
$sub->sms = 1;
$sub->created = common_sql_now();
$sub->uri = self::newURI($sub->subscriber,
$sub->subscribed,
$sub->created);
$result = $sub->insert();
if (!$result) {
common_log_db_error($sub, 'INSERT', __FILE__);
// TRANS: Exception thrown when a subscription could not be stored on the server.
throw new Exception(_('Could not save subscription.'));
}
return $sub;
}
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::getKV('id', $this->subscribed);
if (!empty($subscribedUser)) {
$subscriber = Profile::getKV('id', $this->subscriber);
mail_subscribe_notify_profile($subscribedUser, $subscriber);
}
}
/**
* Cancel a subscription
*
*/
static function cancel(Profile $subscriber, Profile $other)
{
if (!self::exists($subscriber, $other)) {
// TRANS: Exception thrown when trying to unsibscribe without a subscription.
throw new Exception(_('Not subscribed!'));
}
// Don't allow deleting self subs
if ($subscriber->id == $other->id) {
// TRANS: Exception thrown when trying to unsubscribe a user from themselves.
throw new Exception(_('Could not delete self-subscription.'));
}
if (Event::handle('StartUnsubscribe', array($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__);
// TRANS: Exception thrown when a subscription could not be deleted on the server.
throw new Exception(_('Could not delete subscription.'));
}
self::blow('user:notices_with_friends:%d', $subscriber->id);
self::blow('subscription:by-subscriber:'.$subscriber->id);
self::blow('subscription:by-subscribed:'.$other->id);
$subscriber->blowSubscriptionCount();
$other->blowSubscriberCount();
Event::handle('EndUnsubscribe', array($subscriber, $other));
}
return;
}
static function exists(Profile $subscriber, Profile $other)
{
$sub = Subscription::pkeyGet(array('subscriber' => $subscriber->id,
'subscribed' => $other->id));
return (empty($sub)) ? false : true;
}
function asActivity()
{
$subscriber = Profile::getKV('id', $this->subscriber);
$subscribed = Profile::getKV('id', $this->subscribed);
if (empty($subscriber)) {
throw new Exception(sprintf(_('No profile for the subscriber: %d'), $this->subscriber));
}
if (empty($subscribed)) {
throw new Exception(sprintf(_('No profile for the subscribed: %d'), $this->subscribed));
}
$act = new Activity();
$act->verb = ActivityVerb::FOLLOW;
// XXX: rationalize this with the URL
$act->id = $this->getURI();
$act->time = strtotime($this->created);
// TRANS: Activity title when subscribing to another person.
$act->title = _m('TITLE','Follow');
// TRANS: Notification given when one person starts following another.
// TRANS: %1$s is the subscriber, %2$s is the subscribed.
$act->content = sprintf(_('%1$s is now following %2$s.'),
$subscriber->getBestName(),
$subscribed->getBestName());
$act->actor = ActivityObject::fromProfile($subscriber);
$act->objects[] = ActivityObject::fromProfile($subscribed);
$url = common_local_url('AtomPubShowSubscription',
array('subscriber' => $subscriber->id,
'subscribed' => $subscribed->id));
$act->selfLink = $url;
$act->editLink = $url;
return $act;
}
/**
* Stream of subscriptions with the same subscriber
*
* Useful for showing pages that list subscriptions in reverse
* chronological order. Has offset & limit to make paging
* easy.
*
* @param integer $subscriberId Profile ID of the subscriber
* @param integer $offset Offset from latest
* @param integer $limit Maximum number to fetch
*
* @return Subscription stream of subscriptions; use fetch() to iterate
*/
static function bySubscriber($subscriberId,
$offset = 0,
$limit = PROFILES_PER_PAGE)
{
if ($offset + $limit > self::CACHE_WINDOW) {
return new ArrayWrapper(self::realBySubscriber($subscriberId,
$offset,
$limit));
} else {
$key = 'subscription:by-subscriber:'.$subscriberId;
$window = self::cacheGet($key);
if ($window === false) {
$window = self::realBySubscriber($subscriberId,
0,
self::CACHE_WINDOW);
self::cacheSet($key, $window);
}
return new ArrayWrapper(array_slice($window,
$offset,
$limit));
}
}
private static function realBySubscriber($subscriberId,
$offset,
$limit)
{
$sub = new Subscription();
$sub->subscriber = $subscriberId;
$sub->whereAdd('subscribed != ' . $subscriberId);
$sub->orderBy('created DESC');
$sub->limit($offset, $limit);
$sub->find();
$subs = array();
while ($sub->fetch()) {
$subs[] = clone($sub);
}
return $subs;
}
/**
* Stream of subscriptions with the same subscribed profile
*
* Useful for showing pages that list subscribers in reverse
* chronological order. Has offset & limit to make paging
* easy.
*
* @param integer $subscribedId Profile ID of the subscribed
* @param integer $offset Offset from latest
* @param integer $limit Maximum number to fetch
*
* @return Subscription stream of subscriptions; use fetch() to iterate
*/
static function bySubscribed($subscribedId,
$offset = 0,
$limit = PROFILES_PER_PAGE)
{
if ($offset + $limit > self::CACHE_WINDOW) {
return new ArrayWrapper(self::realBySubscribed($subscribedId,
$offset,
$limit));
} else {
$key = 'subscription:by-subscribed:'.$subscribedId;
$window = self::cacheGet($key);
if ($window === false) {
$window = self::realBySubscribed($subscribedId,
0,
self::CACHE_WINDOW);
self::cacheSet($key, $window);
}
return new ArrayWrapper(array_slice($window,
$offset,
$limit));
}
}
private static function realBySubscribed($subscribedId,
$offset,
$limit)
{
$sub = new Subscription();
$sub->subscribed = $subscribedId;
$sub->whereAdd('subscriber != ' . $subscribedId);
$sub->orderBy('created DESC');
$sub->limit($offset, $limit);
$sub->find();
$subs = array();
while ($sub->fetch()) {
$subs[] = clone($sub);
}
return $subs;
}
/**
* Flush cached subscriptions when subscription is updated
*
* Because we cache subscriptions, it's useful to flush them
* here.
*
* @param mixed $orig Original version of object
*
* @return boolean success flag.
*/
function update($orig=null)
{
$result = parent::update($orig);
self::blow('subscription:by-subscriber:'.$this->subscriber);
self::blow('subscription:by-subscribed:'.$this->subscribed);
return $result;
}
function getURI()
{
if (!empty($this->uri)) {
return $this->uri;
} else {
return self::newURI($this->subscriber, $this->subscribed, $this->created);
}
}
static function newURI($subscriber_id, $subscribed_id, $created)
{
return TagURI::mint('follow:%d:%d:%s',
$subscriber_id,
$subscribed_id,
common_date_iso8601($created));
}
}
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