297 lines
9.6 KiB
PHP
297 lines
9.6 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2020, Friendica
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*
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* @license GNU AGPL version 3 or any later version
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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
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* published by the Free Software Foundation, either version 3 of the
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* License, or (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 <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Model\Post;
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use Friendica\Core\Logger;
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use Friendica\Core\System;
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use Friendica\Database\Database;
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use Friendica\Database\DBA;
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use Friendica\DI;
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use Friendica\Util\Images;
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/**
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* Class Media
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*
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* This Model class handles media interactions.
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* This tables stores medias (images, videos, audio files) related to posts.
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*/
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class Media
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{
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const UNKNOWN = 0;
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const IMAGE = 1;
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const VIDEO = 2;
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const AUDIO = 3;
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const TORRENT = 16;
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const DOCUMENT = 128;
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/**
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* Insert a post-media record
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*
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* @param array $media
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* @return void
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*/
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public static function insert(array $media, bool $force = false)
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{
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if (empty($media['url']) || empty($media['uri-id']) || empty($media['type'])) {
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Logger::warning('Incomplete media data', ['media' => $media]);
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return;
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}
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// "document" has got the lowest priority. So when the same file is both attached as document
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// and embedded as picture then we only store the picture or replace the document
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$found = DBA::selectFirst('post-media', ['type'], ['uri-id' => $media['uri-id'], 'url' => $media['url']]);
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if (!$force && !empty($found) && (($found['type'] != self::DOCUMENT) || ($media['type'] == self::DOCUMENT))) {
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Logger::info('Media already exists', ['uri-id' => $media['uri-id'], 'url' => $media['url'], 'callstack' => System::callstack()]);
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return;
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}
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$fields = ['mimetype', 'height', 'width', 'size', 'preview', 'preview-height', 'preview-width', 'description'];
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foreach ($fields as $field) {
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if (empty($media[$field])) {
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unset($media[$field]);
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}
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}
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// We are storing as fast as possible to avoid duplicated network requests
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// when fetching additional information for pictures and other content.
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$result = DBA::insert('post-media', $media, Database::INSERT_UPDATE);
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Logger::info('Stored media', ['result' => $result, 'media' => $media, 'callstack' => System::callstack()]);
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$stored = $media;
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$media = self::fetchAdditionalData($media);
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if (array_diff_assoc($media, $stored)) {
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$result = DBA::insert('post-media', $media, Database::INSERT_UPDATE);
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Logger::info('Updated media', ['result' => $result, 'media' => $media]);
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} else {
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Logger::info('Nothing to update', ['media' => $media]);
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}
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}
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/**
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* Copy attachments from one uri-id to another
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*
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* @param integer $from_uri_id
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* @param integer $to_uri_id
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* @return void
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*/
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public static function copy(int $from_uri_id, int $to_uri_id)
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{
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$attachments = self::getByURIId($from_uri_id);
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foreach ($attachments as $attachment) {
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$attachment['uri-id'] = $to_uri_id;
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self::insert($attachment);
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}
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}
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/**
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* Creates the "[attach]" element from the given attributes
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*
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* @param string $href
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* @param integer $length
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* @param string $type
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* @param string $title
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* @return string "[attach]" element
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*/
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public static function getAttachElement(string $href, int $length, string $type, string $title = '')
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{
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$media = self::fetchAdditionalData(['type' => self::DOCUMENT, 'url' => $href,
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'size' => $length, 'mimetype' => $type, 'description' => $title]);
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return '[attach]href="' . $media['url'] . '" length="' . $media['size'] .
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'" type="' . $media['mimetype'] . '" title="' . $media['description'] . '"[/attach]';
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}
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/**
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* Fetch additional data for the provided media array
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*
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* @param array $media
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* @return array media array with additional data
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*/
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public static function fetchAdditionalData(array $media)
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{
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// Fetch the mimetype or size if missing.
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// We don't do it for torrent links since they need special treatment.
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// We don't do this for images, since we are fetching their details some lines later anyway.
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if (!in_array($media['type'], [self::TORRENT, self::IMAGE]) && (empty($media['mimetype']) || empty($media['size']))) {
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$timeout = DI::config()->get('system', 'xrd_timeout');
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$curlResult = DI::httpRequest()->head($media['url'], ['timeout' => $timeout]);
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if ($curlResult->isSuccess()) {
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$header = $curlResult->getHeaderArray();
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if (empty($media['mimetype']) && !empty($header['content-type'])) {
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$media['mimetype'] = $header['content-type'];
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}
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if (empty($media['size']) && !empty($header['content-length'])) {
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$media['size'] = $header['content-length'];
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}
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}
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}
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$filetype = !empty($media['mimetype']) ? strtolower(substr($media['mimetype'], 0, strpos($media['mimetype'], '/'))) : '';
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if (($media['type'] == self::IMAGE) || ($filetype == 'image')) {
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$imagedata = Images::getInfoFromURLCached($media['url']);
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if (!empty($imagedata)) {
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$media['mimetype'] = $imagedata['mime'];
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$media['size'] = $imagedata['size'];
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$media['width'] = $imagedata[0];
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$media['height'] = $imagedata[1];
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}
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if (!empty($media['preview'])) {
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$imagedata = Images::getInfoFromURLCached($media['preview']);
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if (!empty($imagedata)) {
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$media['preview-width'] = $imagedata[0];
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$media['preview-height'] = $imagedata[1];
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}
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}
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}
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return $media;
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}
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/**
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* Tests for path patterns that are usef for picture links in Friendica
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*
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* @param string $page Link to the image page
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* @param string $preview Preview picture
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* @return boolean
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*/
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private static function isPictureLink(string $page, string $preview)
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{
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return preg_match('#/photos/.*/image/#ism', $page) && preg_match('#/photo/.*-1\.#ism', $preview);
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}
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/**
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* Add media links and remove them from the body
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*
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* @param integer $uriid
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* @param string $body
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* @return string Body without media links
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*/
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public static function insertFromBody(int $uriid, string $body)
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{
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// Simplify image codes
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$body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
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$attachments = [];
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if (preg_match_all("#\[url=([^\]]+?)\]\s*\[img=([^\[\]]*)\]([^\[\]]*)\[\/img\]\s*\[/url\]#ism", $body, $pictures, PREG_SET_ORDER)) {
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foreach ($pictures as $picture) {
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if (!self::isPictureLink($picture[1], $picture[2])) {
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continue;
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}
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$body = str_replace($picture[0], '', $body);
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$image = str_replace('-1.', '-0.', $picture[2]);
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$attachments[] = ['uri-id' => $uriid, 'type' => self::IMAGE, 'url' => $image,
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'preview' => $picture[2], 'description' => $picture[3]];
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}
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}
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if (preg_match_all("/\[img=([^\[\]]*)\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures, PREG_SET_ORDER)) {
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foreach ($pictures as $picture) {
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$body = str_replace($picture[0], '', $body);
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$attachments[] = ['uri-id' => $uriid, 'type' => self::IMAGE, 'url' => $picture[1], 'description' => $picture[2]];
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}
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}
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if (preg_match_all("#\[url=([^\]]+?)\]\s*\[img\]([^\[]+?)\[/img\]\s*\[/url\]#ism", $body, $pictures, PREG_SET_ORDER)) {
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foreach ($pictures as $picture) {
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if (!self::isPictureLink($picture[1], $picture[2])) {
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continue;
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}
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$body = str_replace($picture[0], '', $body);
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$image = str_replace('-1.', '-0.', $picture[2]);
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$attachments[] = ['uri-id' => $uriid, 'type' => self::IMAGE, 'url' => $image,
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'preview' => $picture[2], 'description' => null];
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}
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}
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if (preg_match_all("/\[img\]([^\[\]]*)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
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foreach ($pictures as $picture) {
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$body = str_replace($picture[0], '', $body);
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$attachments[] = ['uri-id' => $uriid, 'type' => self::IMAGE, 'url' => $picture[1]];
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}
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}
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if (preg_match_all("/\[audio\]([^\[\]]*)\[\/audio\]/ism", $body, $audios, PREG_SET_ORDER)) {
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foreach ($audios as $audio) {
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$body = str_replace($audio[0], '', $body);
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$attachments[] = ['uri-id' => $uriid, 'type' => self::AUDIO, 'url' => $audio[1]];
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}
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}
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if (preg_match_all("/\[video\]([^\[\]]*)\[\/video\]/ism", $body, $videos, PREG_SET_ORDER)) {
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foreach ($videos as $video) {
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$body = str_replace($video[0], '', $body);
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$attachments[] = ['uri-id' => $uriid, 'type' => self::VIDEO, 'url' => $video[1]];
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}
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}
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foreach ($attachments as $attachment) {
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self::insert($attachment);
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}
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return trim($body);
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}
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/**
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* Add media links from the attach field
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*
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* @param integer $uriid
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* @param string $attach
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* @return void
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*/
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public static function insertFromAttachment(int $uriid, string $attach)
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{
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if (!preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $attach, $matches, PREG_SET_ORDER)) {
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return;
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}
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foreach ($matches as $attachment) {
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$media['type'] = self::DOCUMENT;
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$media['uri-id'] = $uriid;
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$media['url'] = $attachment[1];
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$media['size'] = $attachment[2];
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$media['mimetype'] = $attachment[3];
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$media['description'] = $attachment[4] ?? '';
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self::insert($media);
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}
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}
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/**
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* Retrieves the media attachments associated with the provided item ID.
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*
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* @param int $uri_id
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* @param array $types
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* @return array
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* @throws \Exception
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*/
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public static function getByURIId(int $uri_id, array $types = [])
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{
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$condition = ['uri-id' => $uri_id];
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if (!empty($types)) {
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$condition = DBA::mergeConditions($condition, ['type' => $types]);
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}
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return DBA::selectToArray('post-media', [], $condition);
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}
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}
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