435 lines
15 KiB
PHP
435 lines
15 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (C) 2020, Friendica
|
|
*
|
|
* @license GNU AGPL version 3 or any later version
|
|
*
|
|
* 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 <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
namespace Friendica\Model\Contact;
|
|
|
|
use Exception;
|
|
use Friendica\Core\Logger;
|
|
use Friendica\Core\Protocol;
|
|
use Friendica\Database\DBA;
|
|
use Friendica\DI;
|
|
use Friendica\Model\APContact;
|
|
use Friendica\Model\Contact;
|
|
use Friendica\Protocol\ActivityPub;
|
|
use Friendica\Util\DateTimeFormat;
|
|
use Friendica\Util\Strings;
|
|
|
|
/**
|
|
* This class provides relationship information based on the `contact-relation` table.
|
|
* This table is directional (cid = source, relation-cid = target), references public contacts (with uid=0) and records both
|
|
* follows and the last interaction (likes/comments) on public posts.
|
|
*/
|
|
class Relation
|
|
{
|
|
/**
|
|
* No discovery of followers/followings
|
|
*/
|
|
const DISCOVERY_NONE = 0;
|
|
/**
|
|
* Discover followers/followings of local contacts
|
|
*/
|
|
const DISCOVERY_LOCAL = 1;
|
|
/**
|
|
* Discover followers/followings of local contacts and contacts that visibly interacted on the system
|
|
*/
|
|
const DISCOVERY_INTERACTOR = 2;
|
|
/**
|
|
* Discover followers/followings of all contacts
|
|
*/
|
|
const DISCOVERY_ALL = 3;
|
|
|
|
public static function store(int $target, int $actor, string $interaction_date)
|
|
{
|
|
if ($actor == $target) {
|
|
return;
|
|
}
|
|
|
|
DBA::update('contact-relation', ['last-interaction' => $interaction_date], ['cid' => $target, 'relation-cid' => $actor], true);
|
|
}
|
|
|
|
/**
|
|
* Fetches the followers of a given profile and adds them
|
|
*
|
|
* @param string $url URL of a profile
|
|
* @return void
|
|
*/
|
|
public static function discoverByUrl(string $url)
|
|
{
|
|
$contact = Contact::getByURL($url);
|
|
if (empty($contact)) {
|
|
return;
|
|
}
|
|
|
|
if (!self::isDiscoverable($url, $contact)) {
|
|
return;
|
|
}
|
|
|
|
$apcontact = APContact::getByURL($url, false);
|
|
|
|
if (!empty($apcontact['followers']) && is_string($apcontact['followers'])) {
|
|
$followers = ActivityPub::fetchItems($apcontact['followers']);
|
|
} else {
|
|
$followers = [];
|
|
}
|
|
|
|
if (!empty($apcontact['following']) && is_string($apcontact['following'])) {
|
|
$followings = ActivityPub::fetchItems($apcontact['following']);
|
|
} else {
|
|
$followings = [];
|
|
}
|
|
|
|
if (empty($followers) && empty($followings)) {
|
|
DBA::update('contact', ['last-discovery' => DateTimeFormat::utcNow()], ['id' => $contact['id']]);
|
|
Logger::info('The contact does not offer discoverable data', ['id' => $contact['id'], 'url' => $url, 'network' => $contact['network']]);
|
|
return;
|
|
}
|
|
|
|
$target = $contact['id'];
|
|
|
|
if (!empty($followers)) {
|
|
// Clear the follower list, since it will be recreated in the next step
|
|
DBA::update('contact-relation', ['follows' => false], ['cid' => $target]);
|
|
}
|
|
|
|
$contacts = [];
|
|
foreach (array_merge($followers, $followings) as $contact) {
|
|
if (is_string($contact)) {
|
|
$contacts[] = $contact;
|
|
} elseif (!empty($contact['url']) && is_string($contact['url'])) {
|
|
$contacts[] = $contact['url'];
|
|
}
|
|
}
|
|
$contacts = array_unique($contacts);
|
|
|
|
$follower_counter = 0;
|
|
$following_counter = 0;
|
|
|
|
Logger::info('Discover contacts', ['id' => $target, 'url' => $url, 'contacts' => count($contacts)]);
|
|
foreach ($contacts as $contact) {
|
|
$actor = Contact::getIdForURL($contact);
|
|
if (!empty($actor)) {
|
|
if (in_array($contact, $followers)) {
|
|
$fields = ['cid' => $target, 'relation-cid' => $actor];
|
|
DBA::update('contact-relation', ['follows' => true, 'follow-updated' => DateTimeFormat::utcNow()], $fields, true);
|
|
$follower_counter++;
|
|
}
|
|
|
|
if (in_array($contact, $followings)) {
|
|
$fields = ['cid' => $actor, 'relation-cid' => $target];
|
|
DBA::update('contact-relation', ['follows' => true, 'follow-updated' => DateTimeFormat::utcNow()], $fields, true);
|
|
$following_counter++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!empty($followers)) {
|
|
// Delete all followers that aren't followers anymore (and aren't interacting)
|
|
DBA::delete('contact-relation', ['cid' => $target, 'follows' => false, 'last-interaction' => DBA::NULL_DATETIME]);
|
|
}
|
|
|
|
DBA::update('contact', ['last-discovery' => DateTimeFormat::utcNow()], ['id' => $target]);
|
|
Logger::info('Contacts discovery finished', ['id' => $target, 'url' => $url, 'follower' => $follower_counter, 'following' => $following_counter]);
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Tests if a given contact url is discoverable
|
|
*
|
|
* @param string $url Contact url
|
|
* @param array $contact Contact array
|
|
* @return boolean True if contact is discoverable
|
|
*/
|
|
public static function isDiscoverable(string $url, array $contact = [])
|
|
{
|
|
$contact_discovery = DI::config()->get('system', 'contact_discovery');
|
|
|
|
if ($contact_discovery == self::DISCOVERY_NONE) {
|
|
return false;
|
|
}
|
|
|
|
if (empty($contact)) {
|
|
$contact = Contact::getByURL($url);
|
|
}
|
|
|
|
if (empty($contact)) {
|
|
return false;
|
|
}
|
|
|
|
if ($contact['last-discovery'] > DateTimeFormat::utc('now - 1 month')) {
|
|
Logger::info('No discovery - Last was less than a month ago.', ['id' => $contact['id'], 'url' => $url, 'discovery' => $contact['last-discovery']]);
|
|
return false;
|
|
}
|
|
|
|
if ($contact_discovery != self::DISCOVERY_ALL) {
|
|
$local = DBA::exists('contact', ["`nurl` = ? AND `uid` != ?", Strings::normaliseLink($url), 0]);
|
|
if (($contact_discovery == self::DISCOVERY_LOCAL) && !$local) {
|
|
Logger::info('No discovery - This contact is not followed/following locally.', ['id' => $contact['id'], 'url' => $url]);
|
|
return false;
|
|
}
|
|
|
|
if ($contact_discovery == self::DISCOVERY_INTERACTOR) {
|
|
$interactor = DBA::exists('contact-relation', ["`relation-cid` = ? AND `last-interaction` > ?", $contact['id'], DBA::NULL_DATETIME]);
|
|
if (!$local && !$interactor) {
|
|
Logger::info('No discovery - This contact is not interacting locally.', ['id' => $contact['id'], 'url' => $url]);
|
|
return false;
|
|
}
|
|
}
|
|
} elseif ($contact['created'] > DateTimeFormat::utc('now - 1 day')) {
|
|
// Newly created contacts are not discovered to avoid DDoS attacks
|
|
Logger::info('No discovery - Contact record is less than a day old.', ['id' => $contact['id'], 'url' => $url, 'discovery' => $contact['created']]);
|
|
return false;
|
|
}
|
|
|
|
if (!in_array($contact['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::OSTATUS])) {
|
|
$apcontact = APContact::getByURL($url, false);
|
|
if (empty($apcontact)) {
|
|
Logger::info('No discovery - The contact does not seem to speak ActivityPub.', ['id' => $contact['id'], 'url' => $url, 'network' => $contact['network']]);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Counts all the known follows of the provided public contact
|
|
*
|
|
* @param int $cid Public contact id
|
|
* @param array $condition Additional condition on the contact table
|
|
* @return int
|
|
* @throws Exception
|
|
*/
|
|
public static function countFollows(int $cid, array $condition = [])
|
|
{
|
|
$condition = DBA::mergeConditions($condition,
|
|
['`id` IN (SELECT `relation-cid` FROM `contact-relation` WHERE `cid` = ? AND `follows`)',
|
|
$cid]
|
|
);
|
|
|
|
return DI::dba()->count('contact', $condition);
|
|
}
|
|
|
|
/**
|
|
* Returns a paginated list of contacts that are followed the provided public contact.
|
|
*
|
|
* @param int $cid Public contact id
|
|
* @param array $field Field list
|
|
* @param array $condition Additional condition on the contact table
|
|
* @param int $count
|
|
* @param int $offset
|
|
* @param bool $shuffle
|
|
* @return array
|
|
* @throws Exception
|
|
*/
|
|
public static function listFollows(int $cid, array $fields = [], array $condition = [], int $count = 30, int $offset = 0, bool $shuffle = false)
|
|
{
|
|
$condition = DBA::mergeConditions($condition,
|
|
['`id` IN (SELECT `relation-cid` FROM `contact-relation` WHERE `cid` = ? AND `follows`)',
|
|
$cid]
|
|
);
|
|
|
|
return DI::dba()->selectToArray('contact', $fields, $condition,
|
|
['limit' => [$offset, $count], 'order' => [$shuffle ? 'RAND()' : 'name']]
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Counts all the known followers of the provided public contact
|
|
*
|
|
* @param int $cid Public contact id
|
|
* @param array $condition Additional condition on the contact table
|
|
* @return int
|
|
* @throws Exception
|
|
*/
|
|
public static function countFollowers(int $cid, array $condition = [])
|
|
{
|
|
$condition = DBA::mergeConditions($condition,
|
|
['`id` IN (SELECT `cid` FROM `contact-relation` WHERE `relation-cid` = ? AND `follows`)',
|
|
$cid]
|
|
);
|
|
|
|
return DI::dba()->count('contact', $condition);
|
|
}
|
|
|
|
/**
|
|
* Returns a paginated list of contacts that follow the provided public contact.
|
|
*
|
|
* @param int $cid Public contact id
|
|
* @param array $field Field list
|
|
* @param array $condition Additional condition on the contact table
|
|
* @param int $count
|
|
* @param int $offset
|
|
* @param bool $shuffle
|
|
* @return array
|
|
* @throws Exception
|
|
*/
|
|
public static function listFollowers(int $cid, array $fields = [], array $condition = [], int $count = 30, int $offset = 0, bool $shuffle = false)
|
|
{
|
|
$condition = DBA::mergeConditions($condition,
|
|
['`id` IN (SELECT `cid` FROM `contact-relation` WHERE `relation-cid` = ? AND `follows`)', $cid]
|
|
);
|
|
|
|
return DI::dba()->selectToArray('contact', $fields, $condition,
|
|
['limit' => [$offset, $count], 'order' => [$shuffle ? 'RAND()' : 'name']]
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Counts the number of contacts that both provided public contacts have interacted with at least once.
|
|
* Interactions include follows and likes and comments on public posts.
|
|
*
|
|
* @param int $sourceId Public contact id
|
|
* @param int $targetId Public contact id
|
|
* @param array $condition Additional condition array on the contact table
|
|
* @return int
|
|
* @throws Exception
|
|
*/
|
|
public static function countCommon(int $sourceId, int $targetId, array $condition = [])
|
|
{
|
|
$condition = DBA::mergeConditions($condition,
|
|
['`id` IN (SELECT `relation-cid` FROM `contact-relation` WHERE `cid` = ?)
|
|
AND `id` IN (SELECT `relation-cid` FROM `contact-relation` WHERE `cid` = ?)',
|
|
$sourceId, $targetId]
|
|
);
|
|
|
|
return DI::dba()->count('contact', $condition);
|
|
}
|
|
|
|
/**
|
|
* Returns a paginated list of contacts that both provided public contacts have interacted with at least once.
|
|
* Interactions include follows and likes and comments on public posts.
|
|
*
|
|
* @param int $sourceId Public contact id
|
|
* @param int $targetId Public contact id
|
|
* @param array $field Field list
|
|
* @param array $condition Additional condition on the contact table
|
|
* @param int $count
|
|
* @param int $offset
|
|
* @param bool $shuffle
|
|
* @return array
|
|
* @throws Exception
|
|
*/
|
|
public static function listCommon(int $sourceId, int $targetId, array $fields = [], array $condition = [], int $count = 30, int $offset = 0, bool $shuffle = false)
|
|
{
|
|
$condition = DBA::mergeConditions($condition,
|
|
["`id` IN (SELECT `relation-cid` FROM `contact-relation` WHERE `cid` = ? AND `follows`)
|
|
AND `id` IN (SELECT `relation-cid` FROM `contact-relation` WHERE `cid` = ? AND `follows`)",
|
|
$sourceId, $targetId]
|
|
);
|
|
|
|
return DI::dba()->selectToArray('contact', $fields, $condition,
|
|
['limit' => [$offset, $count], 'order' => [$shuffle ? 'name' : 'RAND()']]
|
|
);
|
|
}
|
|
|
|
|
|
/**
|
|
* Counts the number of contacts that are followed by both provided public contacts.
|
|
*
|
|
* @param int $sourceId Public contact id
|
|
* @param int $targetId Public contact id
|
|
* @param array $condition Additional condition array on the contact table
|
|
* @return int
|
|
* @throws Exception
|
|
*/
|
|
public static function countCommonFollows(int $sourceId, int $targetId, array $condition = [])
|
|
{
|
|
$condition = DBA::mergeConditions($condition,
|
|
['`id` IN (SELECT `relation-cid` FROM `contact-relation` WHERE `cid` = ? AND `follows`)
|
|
AND `id` IN (SELECT `relation-cid` FROM `contact-relation` WHERE `cid` = ? AND `follows`)',
|
|
$sourceId, $targetId]
|
|
);
|
|
|
|
return DI::dba()->count('contact', $condition);
|
|
}
|
|
|
|
/**
|
|
* Returns a paginated list of contacts that are followed by both provided public contacts.
|
|
*
|
|
* @param int $sourceId Public contact id
|
|
* @param int $targetId Public contact id
|
|
* @param array $field Field list
|
|
* @param array $condition Additional condition array on the contact table
|
|
* @param int $count
|
|
* @param int $offset
|
|
* @param bool $shuffle
|
|
* @return array
|
|
* @throws Exception
|
|
*/
|
|
public static function listCommonFollows(int $sourceId, int $targetId, array $fields = [], array $condition = [], int $count = 30, int $offset = 0, bool $shuffle = false)
|
|
{
|
|
$condition = DBA::mergeConditions($condition,
|
|
["`id` IN (SELECT `relation-cid` FROM `contact-relation` WHERE `cid` = ? AND `follows`)
|
|
AND `id` IN (SELECT `relation-cid` FROM `contact-relation` WHERE `cid` = ? AND `follows`)",
|
|
$sourceId, $targetId]
|
|
);
|
|
|
|
return DI::dba()->selectToArray('contact', $fields, $condition,
|
|
['limit' => [$offset, $count], 'order' => [$shuffle ? 'name' : 'RAND()']]
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Counts the number of contacts that follow both provided public contacts.
|
|
*
|
|
* @param int $sourceId Public contact id
|
|
* @param int $targetId Public contact id
|
|
* @param array $condition Additional condition on the contact table
|
|
* @return int
|
|
* @throws Exception
|
|
*/
|
|
public static function countCommonFollowers(int $sourceId, int $targetId, array $condition = [])
|
|
{
|
|
$condition = DBA::mergeConditions($condition,
|
|
["`id` IN (SELECT `cid` FROM `contact-relation` WHERE `relation-cid` = ? AND `follows`)
|
|
AND `id` IN (SELECT `cid` FROM `contact-relation` WHERE `relation-cid` = ? AND `follows`)",
|
|
$sourceId, $targetId]
|
|
);
|
|
|
|
return DI::dba()->count('contact', $condition);
|
|
}
|
|
|
|
/**
|
|
* Returns a paginated list of contacts that follow both provided public contacts.
|
|
*
|
|
* @param int $sourceId Public contact id
|
|
* @param int $targetId Public contact id
|
|
* @param array $field Field list
|
|
* @param array $condition Additional condition on the contact table
|
|
* @param int $count
|
|
* @param int $offset
|
|
* @param bool $shuffle
|
|
* @return array
|
|
* @throws Exception
|
|
*/
|
|
public static function listCommonFollowers(int $sourceId, int $targetId, array $fields = [], array $condition = [], int $count = 30, int $offset = 0, bool $shuffle = false)
|
|
{
|
|
$condition = DBA::mergeConditions($condition,
|
|
["`id` IN (SELECT `cid` FROM `contact-relation` WHERE `relation-cid` = ? AND `follows`)
|
|
AND `id` IN (SELECT `cid` FROM `contact-relation` WHERE `relation-cid` = ? AND `follows`)",
|
|
$sourceId, $targetId]
|
|
);
|
|
|
|
return DI::dba()->selectToArray('contact', $fields, $condition,
|
|
['limit' => [$offset, $count], 'order' => [$shuffle ? 'name' : 'RAND()']]
|
|
);
|
|
}
|
|
}
|