ec4e432d55
Sometimes we just want to accept the user's wrong, but when it comes to remote APIs etc. we probably want to let the client know it has done something already (in this case multiple identical subscription requests - which might indicate to it that it should refresh the sub lists or something).
449 lines
16 KiB
PHP
449 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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// Will throw an AlreadyFulfilledException if this queue item already exists.
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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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$other->blowSubscriberCount();
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if ($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 ($sub instanceof Subscription) { // i.e. not SubscriptionQueue
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Event::handle('EndSubscribe', array($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 $e) {
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// Nothing to see here, move along...
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return self::getSubscription($subscriber, $other);
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}
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return $sub;
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}
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/**
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* Low-level subscription save.
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* Outside callers should use Subscription::start()
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*/
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protected function saveNew($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===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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