friendica/src/Model/Post/Link.php
2022-06-23 17:30:17 +02:00

162 lines
4.7 KiB
PHP

<?php
/**
* @copyright Copyright (C) 2010-2022, the Friendica project
*
* @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\Post;
use Friendica\Core\Logger;
use Friendica\Core\System;
use Friendica\Database\Database;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Network\HTTPClient\Client\HttpClientAccept;
use Friendica\Network\HTTPClient\Client\HttpClientOptions;
use Friendica\Util\Proxy;
/**
* Class Link
*
* This Model class handles post related external links
*/
class Link
{
/**
* Check if the link is stored
*
* @param int $uriId
* @param string $url URL
* @return bool Whether record has been found
*/
public static function exists(int $uriId, string $url): bool
{
return DBA::exists('post-link', ['uri-id' => $uriId, 'url' => $url]);
}
/**
* Returns URL by URI id and other URL
*
* @param int $uriId
* @param string $url
* @param string $size
* @return string Found link URL + id on success, $url on failture
*/
public static function getByLink(int $uriId, string $url, string $size = ''): string
{
if (empty($uriId) || empty($url) || Proxy::isLocalImage($url)) {
return $url;
}
if (!in_array(parse_url($url, PHP_URL_SCHEME), ['http', 'https'])) {
Logger::info('Bad URL, quitting', ['uri-id' => $uriId, 'url' => $url, 'callstack' => System::callstack(20)]);
return $url;
}
$link = DBA::selectFirst('post-link', ['id'], ['uri-id' => $uriId, 'url' => $url]);
if (!empty($link['id'])) {
$id = $link['id'];
Logger::info('Found', ['id' => $id, 'uri-id' => $uriId, 'url' => $url]);
} else {
$mime = self::fetchMimeType($url);
DBA::insert('post-link', ['uri-id' => $uriId, 'url' => $url, 'mimetype' => $mime], Database::INSERT_IGNORE);
$id = DBA::lastInsertId();
Logger::info('Inserted', ['id' => $id, 'uri-id' => $uriId, 'url' => $url]);
}
if (empty($id)) {
return $url;
}
$url = DI::baseUrl() . '/photo/link/';
switch ($size) {
case Proxy::SIZE_MICRO:
$url .= Proxy::PIXEL_MICRO . '/';
break;
case Proxy::SIZE_THUMB:
$url .= Proxy::PIXEL_THUMB . '/';
break;
case Proxy::SIZE_SMALL:
$url .= Proxy::PIXEL_SMALL . '/';
break;
case Proxy::SIZE_MEDIUM:
$url .= Proxy::PIXEL_MEDIUM . '/';
break;
case Proxy::SIZE_LARGE:
$url .= Proxy::PIXEL_LARGE . '/';
break;
}
return $url . $id;
}
/**
* Fetches MIME type by URL and Accept: header
*
* @param string $url URL to fetch
* @param string $accept Comma-separated list of expected response MIME type(s)
* @return string Discovered MIME type or empty string on failure
*/
private static function fetchMimeType(string $url, string $accept = HttpClientAccept::DEFAULT): string
{
$timeout = DI::config()->get('system', 'xrd_timeout');
$curlResult = DI::httpClient()->head($url, [HttpClientOptions::TIMEOUT => $timeout, HttpClientOptions::ACCEPT_CONTENT => $accept]);
if ($curlResult->isSuccess() && empty($media['mimetype'])) {
return $curlResult->getHeader('Content-Type')[0] ?? '';
}
return '';
}
/**
* Add external links and replace them in the body
*
* @param integer $uriId
* @param string $body Item body formatted with BBCodes
* @return string Body with replaced links
*/
public static function insertFromBody(int $uriId, string $body): string
{
if (preg_match_all("/\[img\=([0-9]*)x([0-9]*)\](http.*?)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
foreach ($pictures as $picture) {
$body = str_replace($picture[3], self::getByLink($uriId, $picture[3]), $body);
}
}
if (preg_match_all("/\[img=(http[^\[\]]*)\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures, PREG_SET_ORDER)) {
foreach ($pictures as $picture) {
$body = str_replace($picture[1], self::getByLink($uriId, $picture[1]), $body);
}
}
if (preg_match_all("/\[img\](http[^\[\]]*)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
foreach ($pictures as $picture) {
$body = str_replace($picture[1], self::getByLink($uriId, $picture[1]), $body);
}
}
return trim($body);
}
}