src/Model/Post/Media.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model\Post;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Core\Logger;
  26 use Friendica\Core\System;
  27 use Friendica\Database\Database;
  28 use Friendica\Database\DBA;
  29 use Friendica\DI;
  30 use Friendica\Model\Item;
  31 use Friendica\Model\Photo;
  32 use Friendica\Model\Post;
  33 use Friendica\Network\HTTPClient\Client\HttpClientAccept;
  34 use Friendica\Network\HTTPClient\Client\HttpClientOptions;
  35 use Friendica\Util\Images;
  36 use Friendica\Util\Network;
  37 use Friendica\Util\ParseUrl;
  38 use Friendica\Util\Proxy;
  39 use Friendica\Util\Strings;
  40
  41 /**
  42  * Class Media
  43  *
  44  * This Model class handles media interactions.
  45  * This tables stores medias (images, videos, audio files) related to posts.
  46  */
  47 class Media
  48 {
  49         const UNKNOWN     = 0;
  50         const IMAGE       = 1;
  51         const VIDEO       = 2;
  52         const AUDIO       = 3;
  53         const TEXT        = 4;
  54         const APPLICATION = 5;
  55         const TORRENT     = 16;
  56         const HTML        = 17;
  57         const XML         = 18;
  58         const PLAIN       = 19;
  59         const DOCUMENT    = 128;
  60
  61         /**
  62          * Insert a post-media record
  63          *
  64          * @param array $media
  65          * @return void
  66          */
  67         public static function insert(array $media, bool $force = false)
  68         {
  69                 if (empty($media['url']) || empty($media['uri-id']) || !isset($media['type'])) {
  70                         Logger::warning('Incomplete media data', ['media' => $media]);
  71                         return;
  72                 }
  73
  74                 if (DBA::exists('post-media', ['uri-id' => $media['uri-id'], 'preview' => $media['url']])) {
  75                         Logger::info('Media already exists as preview', ['uri-id' => $media['uri-id'], 'url' => $media['url'], 'callstack' => System::callstack()]);
  76                         return;
  77                 }
  78
  79                 // "document" has got the lowest priority. So when the same file is both attached as document
  80                 // and embedded as picture then we only store the picture or replace the document
  81                 $found = DBA::selectFirst('post-media', ['type'], ['uri-id' => $media['uri-id'], 'url' => $media['url']]);
  82                 if (!$force && !empty($found) && (($found['type'] != self::DOCUMENT) || ($media['type'] == self::DOCUMENT))) {
  83                         Logger::info('Media already exists', ['uri-id' => $media['uri-id'], 'url' => $media['url'], 'callstack' => System::callstack()]);
  84                         return;
  85                 }
  86
  87                 $media = self::unsetEmptyFields($media);
  88
  89                 // We are storing as fast as possible to avoid duplicated network requests
  90                 // when fetching additional information for pictures and other content.
  91                 $result = DBA::insert('post-media', $media, Database::INSERT_UPDATE);
  92                 Logger::info('Stored media', ['result' => $result, 'media' => $media, 'callstack' => System::callstack()]);
  93                 $stored = $media;
  94
  95                 $media = self::fetchAdditionalData($media);
  96                 $media = self::unsetEmptyFields($media);
  97
  98                 if (array_diff_assoc($media, $stored)) {
  99                         $result = DBA::insert('post-media', $media, Database::INSERT_UPDATE);
 100                         Logger::info('Updated media', ['result' => $result, 'media' => $media]);
 101                 } else {
 102                         Logger::info('Nothing to update', ['media' => $media]);
 103                 }
 104         }
 105
 106         /**
 107          * Remove empty media fields
 108          *
 109          * @param array $media
 110          * @return array cleaned media array
 111          */
 112         private static function unsetEmptyFields(array $media): array
 113         {
 114                 $fields = ['mimetype', 'height', 'width', 'size', 'preview', 'preview-height', 'preview-width', 'description'];
 115                 foreach ($fields as $field) {
 116                         if (empty($media[$field])) {
 117                                 unset($media[$field]);
 118                         }
 119                 }
 120                 return $media;
 121         }
 122
 123         /**
 124          * Copy attachments from one uri-id to another
 125          *
 126          * @param integer $from_uri_id
 127          * @param integer $to_uri_id
 128          * @return void
 129          */
 130         public static function copy(int $from_uri_id, int $to_uri_id)
 131         {
 132                 $attachments = self::getByURIId($from_uri_id);
 133                 foreach ($attachments as $attachment) {
 134                         $attachment['uri-id'] = $to_uri_id;
 135                         self::insert($attachment);
 136                 }
 137         }
 138
 139         /**
 140          * Creates the "[attach]" element from the given attributes
 141          *
 142          * @param string $href
 143          * @param integer $length
 144          * @param string $type
 145          * @param string $title
 146          * @return string "[attach]" element
 147          */
 148         public static function getAttachElement(string $href, int $length, string $type, string $title = ''): string
 149         {
 150                 $media = self::fetchAdditionalData(['type' => self::DOCUMENT, 'url' => $href,
 151                         'size' => $length, 'mimetype' => $type, 'description' => $title]);
 152
 153                 return '[attach]href="' . $media['url'] . '" length="' . $media['size'] .
 154                         '" type="' . $media['mimetype'] . '" title="' . $media['description'] . '"[/attach]';
 155         }
 156
 157         /**
 158          * Fetch additional data for the provided media array
 159          *
 160          * @param array $media
 161          * @return array media array with additional data
 162          */
 163         public static function fetchAdditionalData(array $media): array
 164         {
 165                 if (Network::isLocalLink($media['url'])) {
 166                         $media = self::fetchLocalData($media);
 167                 }
 168
 169                 // Fetch the mimetype or size if missing.
 170                 if (empty($media['mimetype']) || empty($media['size'])) {
 171                         $timeout = DI::config()->get('system', 'xrd_timeout');
 172                         $curlResult = DI::httpClient()->head($media['url'], [HttpClientOptions::TIMEOUT => $timeout]);
 173
 174                         // Workaround for systems that can't handle a HEAD request
 175                         if (!$curlResult->isSuccess() && ($curlResult->getReturnCode() == 405)) {
 176                                 $curlResult = DI::httpClient()->get($media['url'], HttpClientAccept::DEFAULT, [HttpClientOptions::TIMEOUT => $timeout]);
 177                         }
 178
 179                         if ($curlResult->isSuccess()) {
 180                                 if (empty($media['mimetype'])) {
 181                                         $media['mimetype'] = $curlResult->getHeader('Content-Type')[0] ?? '';
 182                                 }
 183                                 if (empty($media['size'])) {
 184                                         $media['size'] = (int)($curlResult->getHeader('Content-Length')[0] ?? 0);
 185                                 }
 186                         } else {
 187                                 Logger::notice('Could not fetch head', ['media' => $media]);
 188                         }
 189                 }
 190
 191                 $filetype = !empty($media['mimetype']) ? strtolower(current(explode('/', $media['mimetype']))) : '';
 192
 193                 if (($media['type'] == self::IMAGE) || ($filetype == 'image')) {
 194                         $imagedata = Images::getInfoFromURLCached($media['url']);
 195                         if (!empty($imagedata)) {
 196                                 $media['mimetype'] = $imagedata['mime'];
 197                                 $media['size'] = $imagedata['size'];
 198                                 $media['width'] = $imagedata[0];
 199                                 $media['height'] = $imagedata[1];
 200                         } else {
 201                                 Logger::notice('No image data', ['media' => $media]);
 202                         }
 203                         if (!empty($media['preview'])) {
 204                                 $imagedata = Images::getInfoFromURLCached($media['preview']);
 205                                 if (!empty($imagedata)) {
 206                                         $media['preview-width'] = $imagedata[0];
 207                                         $media['preview-height'] = $imagedata[1];
 208                                 }
 209                         }
 210                 }
 211
 212                 if ($media['type'] != self::DOCUMENT) {
 213                         $media = self::addType($media);
 214                 }
 215
 216                 if ($media['type'] == self::HTML) {
 217                         $data = ParseUrl::getSiteinfoCached($media['url'], false);
 218                         $media['preview'] = $data['images'][0]['src'] ?? null;
 219                         $media['preview-height'] = $data['images'][0]['height'] ?? null;
 220                         $media['preview-width'] = $data['images'][0]['width'] ?? null;
 221                         $media['description'] = $data['text'] ?? null;
 222                         $media['name'] = $data['title'] ?? null;
 223                         $media['author-url'] = $data['author_url'] ?? null;
 224                         $media['author-name'] = $data['author_name'] ?? null;
 225                         $media['author-image'] = $data['author_img'] ?? null;
 226                         $media['publisher-url'] = $data['publisher_url'] ?? null;
 227                         $media['publisher-name'] = $data['publisher_name'] ?? null;
 228                         $media['publisher-image'] = $data['publisher_img'] ?? null;
 229                 }
 230                 return $media;
 231         }
 232
 233         /**
 234          * Fetch media data from local resources
 235          * @param array $media
 236          * @return array media with added data
 237          */
 238         private static function fetchLocalData(array $media): array
 239         {
 240                 if (!preg_match('|.*?/photo/(.*[a-fA-F0-9])\-(.*[0-9])\..*[\w]|', $media['url'] ?? '', $matches)) {
 241                         return $media;
 242                 }
 243                 $photo = Photo::selectFirst([], ['resource-id' => $matches[1], 'scale' => $matches[2]]);
 244                 if (!empty($photo)) {
 245                         $media['mimetype'] = $photo['type'];
 246                         $media['size'] = $photo['datasize'];
 247                         $media['width'] = $photo['width'];
 248                         $media['height'] = $photo['height'];
 249                 }
 250
 251                 if (!preg_match('|.*?/photo/(.*[a-fA-F0-9])\-(.*[0-9])\..*[\w]|', $media['preview'] ?? '', $matches)) {
 252                         return $media;
 253                 }
 254                 $photo = Photo::selectFirst([], ['resource-id' => $matches[1], 'scale' => $matches[2]]);
 255                 if (!empty($photo)) {
 256                         $media['preview-width'] = $photo['width'];
 257                         $media['preview-height'] = $photo['height'];
 258                 }
 259
 260                 return $media;
 261         }
 262
 263         /**
 264          * Add the detected type to the media array
 265          *
 266          * @param array $data
 267          * @return array data array with the detected type
 268          */
 269         public static function addType(array $data): array
 270         {
 271                 if (empty($data['mimetype'])) {
 272                         Logger::info('No MimeType provided', ['media' => $data]);
 273                         return $data;
 274                 }
 275
 276                 $type = explode('/', current(explode(';', $data['mimetype'])));
 277                 if (count($type) < 2) {
 278                         Logger::info('Unknown MimeType', ['type' => $type, 'media' => $data]);
 279                         $data['type'] = self::UNKNOWN;
 280                         return $data;
 281                 }
 282
 283                 $filetype = strtolower($type[0]);
 284                 $subtype = strtolower($type[1]);
 285
 286                 if ($filetype == 'image') {
 287                         $data['type'] = self::IMAGE;
 288                 } elseif ($filetype == 'video') {
 289                         $data['type'] = self::VIDEO;
 290                 } elseif ($filetype == 'audio') {
 291                         $data['type'] = self::AUDIO;
 292                 } elseif (($filetype == 'text') && ($subtype == 'html')) {
 293                         $data['type'] = self::HTML;
 294                 } elseif (($filetype == 'text') && ($subtype == 'xml')) {
 295                         $data['type'] = self::XML;
 296                 } elseif (($filetype == 'text') && ($subtype == 'plain')) {
 297                         $data['type'] = self::PLAIN;
 298                 } elseif ($filetype == 'text') {
 299                         $data['type'] = self::TEXT;
 300                 } elseif (($filetype == 'application') && ($subtype == 'x-bittorrent')) {
 301                         $data['type'] = self::TORRENT;
 302                 } elseif ($filetype == 'application') {
 303                         $data['type'] = self::APPLICATION;
 304                 } else {
 305                         $data['type'] = self::UNKNOWN;
 306                         Logger::info('Unknown type', ['filetype' => $filetype, 'subtype' => $subtype, 'media' => $data]);
 307                         return $data;
 308                 }
 309
 310                 Logger::debug('Detected type', ['filetype' => $filetype, 'subtype' => $subtype, 'media' => $data]);
 311                 return $data;
 312         }
 313
 314         /**
 315          * Tests for path patterns that are usef for picture links in Friendica
 316          *
 317          * @param string $page    Link to the image page
 318          * @param string $preview Preview picture
 319          * @return boolean
 320          */
 321         private static function isPictureLink(string $page, string $preview): bool
 322         {
 323                 return preg_match('#/photos/.*/image/#ism', $page) && preg_match('#/photo/.*-1\.#ism', $preview);
 324         }
 325
 326         /**
 327          * Add media links and remove them from the body
 328          *
 329          * @param integer $uriid
 330          * @param string $body
 331          * @return string Body without media links
 332          */
 333         public static function insertFromBody(int $uriid, string $body): string
 334         {
 335                 // Simplify image codes
 336                 $unshared_body = $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
 337
 338                 // Only remove the shared data from "real" reshares
 339                 $shared = BBCode::fetchShareAttributes($body);
 340                 if (!empty($shared['guid'])) {
 341                         $unshared_body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
 342                 }
 343
 344                 $attachments = [];
 345                 if (preg_match_all("#\[url=([^\]]+?)\]\s*\[img=([^\[\]]*)\]([^\[\]]*)\[\/img\]\s*\[/url\]#ism", $body, $pictures, PREG_SET_ORDER)) {
 346                         foreach ($pictures as $picture) {
 347                                 if (!self::isPictureLink($picture[1], $picture[2])) {
 348                                         continue;
 349                                 }
 350                                 $body = str_replace($picture[0], '', $body);
 351                                 $image = str_replace('-1.', '-0.', $picture[2]);
 352                                 $attachments[$image] = ['uri-id' => $uriid, 'type' => self::IMAGE, 'url' => $image,
 353                                         'preview' => $picture[2], 'description' => $picture[3]];
 354                         }
 355                 }
 356
 357                 if (preg_match_all("/\[img=([^\[\]]*)\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures, PREG_SET_ORDER)) {
 358                         foreach ($pictures as $picture) {
 359                                 $body = str_replace($picture[0], '', $body);
 360                                 $attachments[$picture[1]] = ['uri-id' => $uriid, 'type' => self::IMAGE, 'url' => $picture[1], 'description' => $picture[2]];
 361                         }
 362                 }
 363
 364                 if (preg_match_all("#\[url=([^\]]+?)\]\s*\[img\]([^\[]+?)\[/img\]\s*\[/url\]#ism", $body, $pictures, PREG_SET_ORDER)) {
 365                         foreach ($pictures as $picture) {
 366                                 if (!self::isPictureLink($picture[1], $picture[2])) {
 367                                         continue;
 368                                 }
 369                                 $body = str_replace($picture[0], '', $body);
 370                                 $image = str_replace('-1.', '-0.', $picture[2]);
 371                                 $attachments[$image] = ['uri-id' => $uriid, 'type' => self::IMAGE, 'url' => $image,
 372                                         'preview' => $picture[2], 'description' => null];
 373                         }
 374                 }
 375
 376                 if (preg_match_all("/\[img\]([^\[\]]*)\[\/img\]/ism", $body, $pictures, PREG_SET_ORDER)) {
 377                         foreach ($pictures as $picture) {
 378                                 $body = str_replace($picture[0], '', $body);
 379                                 $attachments[$picture[1]] = ['uri-id' => $uriid, 'type' => self::IMAGE, 'url' => $picture[1]];
 380                         }
 381                 }
 382
 383                 if (preg_match_all("/\[audio\]([^\[\]]*)\[\/audio\]/ism", $body, $audios, PREG_SET_ORDER)) {
 384                         foreach ($audios as $audio) {
 385                                 $body = str_replace($audio[0], '', $body);
 386                                 $attachments[$audio[1]] = ['uri-id' => $uriid, 'type' => self::AUDIO, 'url' => $audio[1]];
 387                         }
 388                 }
 389
 390                 if (preg_match_all("/\[video\]([^\[\]]*)\[\/video\]/ism", $body, $videos, PREG_SET_ORDER)) {
 391                         foreach ($videos as $video) {
 392                                 $body = str_replace($video[0], '', $body);
 393                                 $attachments[$video[1]] = ['uri-id' => $uriid, 'type' => self::VIDEO, 'url' => $video[1]];
 394                         }
 395                 }
 396
 397                 foreach ($attachments as $attachment) {
 398                         if (Post\Link::exists($uriid, $attachment['preview'] ?? $attachment['url'])) {
 399                                 continue;
 400                         }
 401
 402                         // Only store attachments that are part of the unshared body
 403                         if (Item::containsLink($unshared_body, $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
 404                                 self::insert($attachment);
 405                         }
 406                 }
 407
 408                 return trim($body);
 409         }
 410
 411         /**
 412          * Add media links from a relevant url in the body
 413          *
 414          * @param integer $uriid
 415          * @param string $body
 416          * @return void
 417          */
 418         public static function insertFromRelevantUrl(int $uriid, string $body)
 419         {
 420                 // Only remove the shared data from "real" reshares
 421                 $shared = BBCode::fetchShareAttributes($body);
 422                 if (!empty($shared['guid'])) {
 423                         // Don't look at the shared content
 424                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
 425                 }
 426
 427                 // Remove all hashtags and mentions
 428                 $body = preg_replace("/([#@!])\[url\=(.*?)\](.*?)\[\/url\]/ism", '', $body);
 429
 430                 // Search for pure links
 431                 if (preg_match_all("/\[url\](https?:.*?)\[\/url\]/ism", $body, $matches)) {
 432                         foreach ($matches[1] as $url) {
 433                                 Logger::info('Got page url (link without description)', ['uri-id' => $uriid, 'url' => $url]);
 434                                 self::insert(['uri-id' => $uriid, 'type' => self::UNKNOWN, 'url' => $url]);
 435                         }
 436                 }
 437
 438                 // Search for links with descriptions
 439                 if (preg_match_all("/\[url\=(https?:.*?)\].*?\[\/url\]/ism", $body, $matches)) {
 440                         foreach ($matches[1] as $url) {
 441                                 Logger::info('Got page url (link with description)', ['uri-id' => $uriid, 'url' => $url]);
 442                                 self::insert(['uri-id' => $uriid, 'type' => self::UNKNOWN, 'url' => $url]);
 443                         }
 444                 }
 445         }
 446
 447         /**
 448          * Add media links from the attachment field
 449          *
 450          * @param integer $uriid
 451          * @param string $body
 452          * @return void
 453          */
 454         public static function insertFromAttachmentData(int $uriid, string $body)
 455         {
 456                 // Don't look at the shared content
 457                 $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
 458
 459                 $data = BBCode::getAttachmentData($body);
 460                 if (empty($data))  {
 461                         return;
 462                 }
 463
 464                 Logger::info('Adding attachment data', ['data' => $data]);
 465                 $attachment = [
 466                         'uri-id' => $uriid,
 467                         'type' => self::HTML,
 468                         'url' => $data['url'],
 469                         'preview' => $data['preview'] ?? null,
 470                         'description' => $data['description'] ?? null,
 471                         'name' => $data['title'] ?? null,
 472                         'author-url' => $data['author_url'] ?? null,
 473                         'author-name' => $data['author_name'] ?? null,
 474                         'publisher-url' => $data['provider_url'] ?? null,
 475                         'publisher-name' => $data['provider_name'] ?? null,
 476                 ];
 477                 if (!empty($data['image'])) {
 478                         $attachment['preview'] = $data['image'];
 479                 }
 480                 self::insert($attachment);
 481         }
 482
 483         /**
 484          * Add media links from the attach field
 485          *
 486          * @param integer $uriid
 487          * @param string $attach
 488          * @return void
 489          */
 490         public static function insertFromAttachment(int $uriid, string $attach)
 491         {
 492                 if (!preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $attach, $matches, PREG_SET_ORDER)) {
 493                         return;
 494                 }
 495
 496                 foreach ($matches as $attachment) {
 497                         $media['type'] = self::DOCUMENT;
 498                         $media['uri-id'] = $uriid;
 499                         $media['url'] = $attachment[1];
 500                         $media['size'] = $attachment[2];
 501                         $media['mimetype'] = $attachment[3];
 502                         $media['description'] = $attachment[4] ?? '';
 503
 504                         self::insert($media);
 505                 }
 506         }
 507
 508         /**
 509          * Retrieves the media attachments associated with the provided item ID.
 510          *
 511          * @param int $uri_id URI id
 512          * @param array $types Media types
 513          * @return array|bool Array on success, false on error
 514          * @throws \Exception
 515          */
 516         public static function getByURIId(int $uri_id, array $types = [])
 517         {
 518                 $condition = ['uri-id' => $uri_id];
 519
 520                 if (!empty($types)) {
 521                         $condition = DBA::mergeConditions($condition, ['type' => $types]);
 522                 }
 523
 524                 return DBA::selectToArray('post-media', [], $condition, ['order' => ['id']]);
 525         }
 526
 527         /**
 528          * Checks if media attachments are associated with the provided item ID.
 529          *
 530          * @param int $uri_id URI id
 531          * @param array $types Media types
 532          * @return bool Whether media attachment exists
 533          * @throws \Exception
 534          */
 535         public static function existsByURIId(int $uri_id, array $types = []): bool
 536         {
 537                 $condition = ['uri-id' => $uri_id];
 538
 539                 if (!empty($types)) {
 540                         $condition = DBA::mergeConditions($condition, ['type' => $types]);
 541                 }
 542
 543                 return DBA::exists('post-media', $condition);
 544         }
 545
 546         /**
 547          * Split the attachment media in the three segments "visual", "link" and "additional"
 548          *
 549          * @param int    $uri_id URI id
 550          * @param string $guid GUID
 551          * @param array  $links list of links that shouldn't be added
 552          * @param bool   $has_media
 553          * @return array attachments
 554          */
 555         public static function splitAttachments(int $uri_id, string $guid = '', array $links = [], bool $has_media = true): array
 556         {
 557                 $attachments = ['visual' => [], 'link' => [], 'additional' => []];
 558
 559                 if (!$has_media) {
 560                         return $attachments;
 561                 }
 562
 563                 $media = self::getByURIId($uri_id);
 564                 if (empty($media)) {
 565                         return $attachments;
 566                 }
 567
 568                 $heights = [];
 569                 $selected = '';
 570                 $previews = [];
 571
 572                 foreach ($media as $medium) {
 573                         foreach ($links as $link) {
 574                                 if (Strings::compareLink($link, $medium['url'])) {
 575                                         continue 2;
 576                                 }
 577                         }
 578
 579                         // Avoid adding separate media entries for previews
 580                         foreach ($previews as $preview) {
 581                                 if (Strings::compareLink($preview, $medium['url'])) {
 582                                         continue 2;
 583                                 }
 584                         }
 585
 586                         if (!empty($medium['preview'])) {
 587                                 $previews[] = $medium['preview'];
 588                         }
 589
 590                         $type = explode('/', current(explode(';', $medium['mimetype'])));
 591                         if (count($type) < 2) {
 592                                 Logger::info('Unknown MimeType', ['type' => $type, 'media' => $medium]);
 593                                 $filetype = 'unkn';
 594                                 $subtype = 'unkn';
 595                         } else {
 596                                 $filetype = strtolower($type[0]);
 597                                 $subtype = strtolower($type[1]);
 598                         }
 599
 600                         $medium['filetype'] = $filetype;
 601                         $medium['subtype'] = $subtype;
 602
 603                         if ($medium['type'] == self::HTML || (($filetype == 'text') && ($subtype == 'html'))) {
 604                                 $attachments['link'][] = $medium;
 605                                 continue;
 606                         }
 607
 608                         if (in_array($medium['type'], [self::AUDIO, self::IMAGE]) ||
 609                                 in_array($filetype, ['audio', 'image'])) {
 610                                 $attachments['visual'][] = $medium;
 611                         } elseif (($medium['type'] == self::VIDEO) || ($filetype == 'video')) {
 612                                 if (!empty($medium['height'])) {
 613                                         // Peertube videos are delivered in many different resolutions. We pick a moderate one.
 614                                         // Since only Peertube provides a "height" parameter, this wouldn't be executed
 615                                         // when someone for example on Mastodon was sharing multiple videos in a single post.
 616                                         $heights[$medium['height']] = $medium['url'];
 617                                         $video[$medium['url']] = $medium;
 618                                 } else {
 619                                         $attachments['visual'][] = $medium;
 620                                 }
 621                         } else {
 622                                 $attachments['additional'][] = $medium;
 623                         }
 624                 }
 625
 626                 if (!empty($heights)) {
 627                         ksort($heights);
 628                         foreach ($heights as $height => $url) {
 629                                 if (empty($selected) || $height <= 480) {
 630                                         $selected = $url;
 631                                 }
 632                         }
 633
 634                         if (!empty($selected)) {
 635                                 $attachments['visual'][] = $video[$selected];
 636                                 unset($video[$selected]);
 637                                 foreach ($video as $element) {
 638                                         $attachments['additional'][] = $element;
 639                                 }
 640                         }
 641                 }
 642
 643                 return $attachments;
 644         }
 645
 646         /**
 647          * Add media attachments to the body
 648          *
 649          * @param int $uriid
 650          * @param string $body
 651          * @return string body
 652          */
 653         public static function addAttachmentsToBody(int $uriid, string $body = ''): string
 654         {
 655                 if (empty($body)) {
 656                         $item = Post::selectFirst(['body'], ['uri-id' => $uriid]);
 657                         if (!DBA::isResult($item)) {
 658                                 return '';
 659                         }
 660                         $body = $item['body'];
 661                 }
 662                 $original_body = $body;
 663
 664                 $body = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", '', $body);
 665
 666                 foreach (self::getByURIId($uriid, [self::IMAGE, self::AUDIO, self::VIDEO]) as $media) {
 667                         if (Item::containsLink($body, $media['preview'] ?? $media['url'], $media['type'])) {
 668                                 continue;
 669                         }
 670
 671                         if ($media['type'] == self::IMAGE) {
 672                                 if (!empty($media['preview'])) {
 673                                         if (!empty($media['description'])) {
 674                                                 $body .= "\n[url=" . $media['url'] . "][img=" . $media['preview'] . ']' . $media['description'] .'[/img][/url]';
 675                                         } else {
 676                                                 $body .= "\n[url=" . $media['url'] . "][img]" . $media['preview'] .'[/img][/url]';
 677                                         }
 678                                 } else {
 679                                         if (!empty($media['description'])) {
 680                                                 $body .= "\n[img=" . $media['url'] . ']' . $media['description'] .'[/img]';
 681                                         } else {
 682                                                 $body .= "\n[img]" . $media['url'] .'[/img]';
 683                                         }
 684                                 }
 685                         } elseif ($media['type'] == self::AUDIO) {
 686                                 $body .= "\n[audio]" . $media['url'] . "[/audio]\n";
 687                         } elseif ($media['type'] == self::VIDEO) {
 688                                 $body .= "\n[video]" . $media['url'] . "[/video]\n";
 689                         }
 690                 }
 691
 692                 if (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $original_body, $match)) {
 693                         $body .= "\n" . $match[1];
 694                 }
 695
 696                 return $body;
 697         }
 698
 699         /**
 700          * Get preview link for given media id
 701          *
 702          * @param integer $id   media id
 703          * @param string  $size One of the Proxy::SIZE_* constants
 704          * @return string preview link
 705          */
 706         public static function getPreviewUrlForId(int $id, string $size = ''): string
 707         {
 708                 $url = DI::baseUrl() . '/photo/preview/';
 709                 switch ($size) {
 710                         case Proxy::SIZE_MICRO:
 711                                 $url .= Proxy::PIXEL_MICRO . '/';
 712                                 break;
 713                         case Proxy::SIZE_THUMB:
 714                                 $url .= Proxy::PIXEL_THUMB . '/';
 715                                 break;
 716                         case Proxy::SIZE_SMALL:
 717                                 $url .= Proxy::PIXEL_SMALL . '/';
 718                                 break;
 719                         case Proxy::SIZE_MEDIUM:
 720                                 $url .= Proxy::PIXEL_MEDIUM . '/';
 721                                 break;
 722                         case Proxy::SIZE_LARGE:
 723                                 $url .= Proxy::PIXEL_LARGE . '/';
 724                                 break;
 725                 }
 726                 return $url . $id;
 727         }
 728
 729         /**
 730          * Get media link for given media id
 731          *
 732          * @param integer $id   media id
 733          * @param string  $size One of the Proxy::SIZE_* constants
 734          * @return string media link
 735          */
 736         public static function getUrlForId(int $id, string $size = ''): string
 737         {
 738                 $url = DI::baseUrl() . '/photo/media/';
 739                 switch ($size) {
 740                         case Proxy::SIZE_MICRO:
 741                                 $url .= Proxy::PIXEL_MICRO . '/';
 742                                 break;
 743                         case Proxy::SIZE_THUMB:
 744                                 $url .= Proxy::PIXEL_THUMB . '/';
 745                                 break;
 746                         case Proxy::SIZE_SMALL:
 747                                 $url .= Proxy::PIXEL_SMALL . '/';
 748                                 break;
 749                         case Proxy::SIZE_MEDIUM:
 750                                 $url .= Proxy::PIXEL_MEDIUM . '/';
 751                                 break;
 752                         case Proxy::SIZE_LARGE:
 753                                 $url .= Proxy::PIXEL_LARGE . '/';
 754                                 break;
 755                 }
 756                 return $url . $id;
 757         }
 758 }