friendica/src/Model/Tag.php

167 lines
4.6 KiB
PHP
Raw Normal View History

2020-04-15 18:37:09 +02:00
<?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;
use Friendica\Core\Logger;
use Friendica\Database\DBA;
use Friendica\Util\Strings;
2020-04-15 18:37:09 +02:00
/**
* Class Tag
*
* This Model class handles tag table interactions.
* This tables stores relevant tags related to posts, like hashtags and mentions.
*/
class Tag
{
2020-04-16 06:20:06 +02:00
const UNKNOWN = 0;
const HASHTAG = 1;
const MENTION = 2;
const CATEGORY = 3;
const FILE = 5;
2020-04-15 18:37:09 +02:00
/**
* An implicit mention is a mention in a comment body that is redundant with the threading information.
*/
2020-04-16 06:20:06 +02:00
const IMPLICIT_MENTION = 8;
2020-04-15 18:37:09 +02:00
/**
* An exclusive mention transfers the ownership of the post to the target account, usually a forum.
*/
2020-04-16 06:20:06 +02:00
const EXCLUSIVE_MENTION = 9;
2020-04-15 18:37:09 +02:00
2020-04-16 06:20:06 +02:00
const TAG_CHARACTER = [
self::HASHTAG => '#',
self::MENTION => '@',
self::IMPLICIT_MENTION => '%',
self::EXCLUSIVE_MENTION => '!',
];
2020-04-15 18:37:09 +02:00
2020-04-17 09:58:54 +02:00
/**
* Store tag/mention elements
*
* @param integer $uriid
* @param integer $type
* @param string $name
* @param string $url
*/
public static function store(int $uriid, int $type, string $name, string $url = '')
{
$name = trim($name, "\x00..\x20\xFF#!@");
if (empty($name)) {
return;
}
$cid = 0;
$tagid = 0;
if (in_array($type, [Tag::MENTION, Tag::EXCLUSIVE_MENTION, Tag::IMPLICIT_MENTION])) {
if (empty($url)) {
// No mention without a contact url
return;
}
Logger::info('Get ID for contact', ['url' => $url]);
$condition = ['nurl' => Strings::normaliseLink($url), 'uid' => 0, 'deleted' => false];
$contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
if (DBA::isResult($contact)) {
$cid = $contact['id'];
} else {
// The contact wasn't found in the system (most likely some dead account)
// We ensure that we only store a single entry by overwriting the previous name
DBA::update('tag', ['name' => substr($name, 0, 96)], ['url' => $url]);
}
}
if (empty($cid)) {
$fields = ['name' => substr($name, 0, 96)];
if (!empty($url) && ($url != $name)) {
$fields['url'] = strtolower($url);
}
$tag = DBA::selectFirst('tag', ['id'], $fields);
if (!DBA::isResult($tag)) {
DBA::insert('tag', $fields, true);
$tagid = DBA::lastInsertId();
} else {
$tagid = $tag['id'];
}
if (empty($tagid)) {
Logger::error('No tag id created', $fields);
return;
}
}
DBA::insert('post-tag', ['uri-id' => $uriid, 'type' => $type, 'tid' => $tagid, 'cid' => $cid], true);
Logger::info('Stored tag/mention', ['uri-id' => $uriid, 'tag-id' => $tagid, 'contact-id' => $cid]);
}
2020-04-17 09:58:54 +02:00
/**
* Store tag/mention elements
*
* @param integer $uriid
* @param string $hash
* @param string $name
* @param string $url
*/
public static function storeByHash(int $uriid, string $hash, string $name, string $url = '')
{
if ($hash == self::TAG_CHARACTER[self::MENTION]) {
$type = self::MENTION;
} elseif ($hash == self::TAG_CHARACTER[self::EXCLUSIVE_MENTION]) {
$type = self::EXCLUSIVE_MENTION;
} elseif ($hash == self::TAG_CHARACTER[self::IMPLICIT_MENTION]) {
$type = self::IMPLICIT_MENTION;
} elseif ($hash == self::TAG_CHARACTER[self::HASHTAG]) {
$type = self::HASHTAG;
} else {
return;
}
self::store($uriid, $type, $name, $url);
}
2020-04-15 18:37:09 +02:00
/**
* Store tags and mentions from the body
*
* @param integer $uriid URI-Id
* @param string $body Body of the post
* @param string $tags Accepted tags
2020-04-15 18:37:09 +02:00
*/
2020-04-18 18:14:38 +02:00
public static function storeFromBody(int $uriid, string $body, string $tags = null)
2020-04-15 18:37:09 +02:00
{
2020-04-18 18:14:38 +02:00
if (is_null($tags)) {
$tags = self::TAG_CHARACTER[self::HASHTAG] . self::TAG_CHARACTER[self::MENTION] . self::TAG_CHARACTER[self::EXCLUSIVE_MENTION];
}
if (!preg_match_all("/([" . $tags . "])\[url\=([^\[\]]*)\]([^\[\]]*)\[\/url\]/ism", $body, $result, PREG_SET_ORDER)) {
2020-04-15 18:37:09 +02:00
return;
}
foreach ($result as $tag) {
self::storeByHash($uriid, $tag[1], $tag[3], $tag[2]);
2020-04-15 18:37:09 +02:00
}
}
}