451 lines
16 KiB
PHP
451 lines
16 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('GNUSOCIAL')) { exit(1); }
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/**
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* Table Definition for subscription
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*/
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class Subscription extends Managed_DataObject
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{
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const CACHE_WINDOW = 201;
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const FORCE = true;
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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(191) not 255 because utf8mb4 takes more space
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public $secret; // varchar(191) not 255 because utf8mb4 takes more space
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public $uri; // varchar(191) not 255 because utf8mb4 takes more space
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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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public static function schemaDef()
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{
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return array(
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'fields' => array(
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'subscriber' => array('type' => 'int', 'not null' => true, 'description' => 'profile listening'),
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'subscribed' => array('type' => 'int', 'not null' => true, 'description' => 'profile being listened to'),
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'jabber' => array('type' => 'int', 'size' => 'tiny', 'default' => 1, 'description' => 'deliver jabber messages'),
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'sms' => array('type' => 'int', 'size' => 'tiny', 'default' => 1, 'description' => 'deliver sms messages'),
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'token' => array('type' => 'varchar', 'length' => 191, 'description' => 'authorization token'),
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'secret' => array('type' => 'varchar', 'length' => 191, 'description' => 'token secret'),
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'uri' => array('type' => 'varchar', 'length' => 191, 'description' => 'universally unique identifier'),
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'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'),
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'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
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),
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'primary key' => array('subscriber', 'subscribed'),
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'unique keys' => array(
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'subscription_uri_key' => array('uri'),
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),
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'indexes' => array(
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'subscription_subscriber_idx' => array('subscriber', 'created'),
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'subscription_subscribed_idx' => array('subscribed', 'created'),
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'subscription_token_idx' => array('token'),
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),
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);
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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(Profile $subscriber, Profile $other, $force=false)
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{
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if (!$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, $other)) {
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// TRANS: Exception thrown when trying to subscribe while already subscribed.
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throw new AlreadyFulfilledException(_('Already subscribed!'));
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}
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if ($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::getKV('id', $other->id);
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if ($otherUser instanceof User && $otherUser->subscribe_policy == User::SUBSCRIBE_POLICY_MODERATE && !$force) {
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try {
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$sub = Subscription_queue::saveNew($subscriber, $other);
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$sub->notify();
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} catch (AlreadyFulfilledException $e) {
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$sub = Subscription_queue::getSubQueue($subscriber, $other);
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}
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} else {
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$sub = self::saveNew($subscriber, $other);
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$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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$other->blowSubscriberCount();
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if ($otherUser instanceof User &&
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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 (AlreadyFulfilledException $e) {
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// This shouldn't happen due to !self::exists above
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common_debug('Tried to autosubscribe a user to its new 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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if ($sub instanceof Subscription) { // i.e. not Subscription_queue
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Event::handle('EndSubscribe', array($subscriber, $other));
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}
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}
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return $sub;
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}
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static function ensureStart(Profile $subscriber, Profile $other, $force=false)
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{
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try {
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$sub = self::start($subscriber, $other, $force);
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} catch (AlreadyFulfilledException $e) {
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return self::getSubscription($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 static function saveNew(Profile $subscriber, Profile $other)
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{
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$sub = new Subscription();
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$sub->subscriber = $subscriber->getID();
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$sub->subscribed = $other->getID();
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$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===false) {
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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::getKV('id', $this->subscribed);
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if ($subscribedUser instanceof User) {
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$subscriber = Profile::getKV('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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static function cancel(Profile $subscriber, Profile $other)
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{
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if (!self::exists($subscriber, $other)) {
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// TRANS: Exception thrown when trying to unsibscribe without a subscription.
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throw new AlreadyFulfilledException(_('Not subscribed!'));
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}
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// Don't allow deleting self subs
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if ($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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static function exists(Profile $subscriber, Profile $other)
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{
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try {
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$sub = self::getSubscription($subscriber, $other);
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} catch (NoResultException $e) {
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return false;
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}
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return true;
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}
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static function getSubscription(Profile $subscriber, Profile $other)
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{
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// This is essentially a pkeyGet but we have an object to return in NoResultException
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$sub = new Subscription();
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$sub->subscriber = $subscriber->id;
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$sub->subscribed = $other->id;
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if (!$sub->find(true)) {
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throw new NoResultException($sub);
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}
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return $sub;
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}
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function asActivity()
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{
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$subscriber = Profile::getKV('id', $this->subscriber);
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$subscribed = Profile::getKV('id', $this->subscribed);
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if (!$subscriber instanceof Profile) {
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throw new NoProfileException($this->subscriber);
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}
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if (!$subscribed instanceof Profile) {
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throw new NoProfileException($this->subscribed);
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}
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$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 = $subscriber->asActivityObject();
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$act->objects[] = $subscribed->asActivityObject();
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$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 $profile_id ID of the subscriber profile
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* @param integer $offset Offset from latest
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* @param integer $limit Maximum number to fetch
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*
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* @return Subscription stream of subscriptions; use fetch() to iterate
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*/
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public static function bySubscriber($profile_id, $offset = 0, $limit = PROFILES_PER_PAGE)
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{
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// "by subscriber" means it is the list of subscribed users we want
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$ids = self::getSubscribedIDs($profile_id, $offset, $limit);
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return Subscription::listFind('subscribed', $ids);
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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 $profile_id ID of the subscribed profile
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* @param integer $offset Offset from latest
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* @param integer $limit Maximum number to fetch
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*
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* @return Subscription stream of subscriptions; use fetch() to iterate
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*/
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public static function bySubscribed($profile_id, $offset = 0, $limit = PROFILES_PER_PAGE)
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{
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// "by subscribed" means it is the list of subscribers we want
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$ids = self::getSubscriberIDs($profile_id, $offset, $limit);
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return Subscription::listFind('subscriber', $ids);
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}
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// The following are helper functions to the subscription lists,
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// notably the public ones get used in places such as Profile
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public static function getSubscribedIDs($profile_id, $offset, $limit) {
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return self::getSubscriptionIDs('subscribed', $profile_id, $offset, $limit);
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}
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public static function getSubscriberIDs($profile_id, $offset, $limit) {
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return self::getSubscriptionIDs('subscriber', $profile_id, $offset, $limit);
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}
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private static function getSubscriptionIDs($get_type, $profile_id, $offset, $limit)
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{
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switch ($get_type) {
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case 'subscribed':
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$by_type = 'subscriber';
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break;
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case 'subscriber':
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$by_type = 'subscribed';
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break;
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default:
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throw new Exception('Bad type argument to getSubscriptionIDs');
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}
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$cacheKey = 'subscription:by-'.$by_type.':'.$profile_id;
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$queryoffset = $offset;
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$querylimit = $limit;
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if ($offset + $limit <= self::CACHE_WINDOW) {
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// Oh, it seems it should be cached
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$ids = self::cacheGet($cacheKey);
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if (is_array($ids)) {
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return array_slice($ids, $offset, $limit);
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}
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// Being here indicates we didn't find anything cached
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// so we'll have to fill it up simultaneously
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$queryoffset = 0;
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$querylimit = self::CACHE_WINDOW;
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}
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$sub = new Subscription();
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$sub->$by_type = $profile_id;
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$sub->selectAdd($get_type);
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$sub->whereAdd("{$get_type} != {$profile_id}");
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$sub->orderBy('created DESC');
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$sub->limit($queryoffset, $querylimit);
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if (!$sub->find()) {
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return array();
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}
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$ids = $sub->fetchAll($get_type);
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// If we're simultaneously filling up cache, remember to slice
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if ($queryoffset === 0 && $querylimit === self::CACHE_WINDOW) {
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self::cacheSet($cacheKey, $ids);
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return array_slice($ids, $offset, $limit);
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}
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return $ids;
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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 $dataObject Original version of object
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*
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* @return boolean success flag.
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*/
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function update($dataObject=false)
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{
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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 parent::update($dataObject);
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}
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function getURI()
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{
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if (!empty($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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