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242 lines
8.2 KiB
242 lines
8.2 KiB
<?php
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// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
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//
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// All Rights Reserved. See copyright.txt for details and a complete list of authors.
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// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
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// $Id$
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use Tiki\Lib\Alchemy\AlchemyLib;
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/**
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* Plugin definition for preview
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*
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* @return array
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*/
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function wikiplugin_preview_info()
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{
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return [
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'name' => tr('Preview Files'),
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'documentation' => 'PluginPreviewFiles',
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'description' => tr('Enabled to generate preview of images or video files'),
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'prefs' => ['wikiplugin_preview'],
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'iconname' => 'file',
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'introduced' => 18,
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'tags' => ['experimental'],
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'packages_required' => ['media-alchemyst/media-alchemyst' => 'MediaAlchemyst\Alchemyst'],
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'format' => 'html',
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'params' => [
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'fileId' => [
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'required' => true,
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'name' => tr('fileId'),
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'description' => tr('Id of the file in the file gallery'),
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'since' => '18.0',
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'filter' => 'int',
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],
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'animation' => [
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'required' => false,
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'name' => tr('Animation'),
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'description' => tr('Output should be a static image (<code>0</code>) or an animation (<code>1</code>)'),
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'since' => '18.0',
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'filter' => 'int',
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],
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'width' => [
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'required' => false,
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'name' => tr('Width'),
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'description' => tr('Width of the result in pixels'),
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'since' => '18.0',
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'filter' => 'int',
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],
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'height' => [
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'required' => false,
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'name' => tr('Height'),
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'description' => tr('Height of the result in pixels'),
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'since' => '18.0',
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'filter' => 'int',
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],
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'download' => [
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'required' => false,
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'name' => tr('Download'),
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'description' => tr('Show download link to the original file'),
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'since' => '19.0',
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'filter' => 'int',
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],
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'range' => [
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'required' => false,
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'name' => tr('Range'),
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'description' => tr('Page range preview in the format <integer>-<integer>. Example for the preview page from 2 to 4: "2-4"'),
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'since' => '21.0',
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],
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],
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];
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}
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/**
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* Plugin definition for Preview
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*
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* @param $data
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* @param $params
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* @return string|void
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*/
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function wikiplugin_preview($data, $params)
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{
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global $user, $prefs, $tikipath, $tikidomain;
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if (! AlchemyLib::isLibraryAvailable()) {
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return;
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}
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$fileId = isset($params['fileId']) ? (int)$params['fileId'] : 0;
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$animation = isset($params['animation']) ? (int)$params['animation'] : 0;
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$width = isset($params['width']) ? (int)$params['width'] : null;
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$height = isset($params['height']) ? (int)$params['height'] : null;
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$range = isset($params['range']) ? $params['range'] : null;
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$smartyLib = TikiLib::lib('smarty');
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$fileGalleryLib = TikiLib::lib('filegal');
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$userLib = TikiLib::lib('user');
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$file = \Tiki\FileGallery\File::id($fileId);
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if (! $file->exists() || ! $userLib->user_has_perm_on_object($user, $file->fileId, 'file', 'tiki_p_download_files')) {
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return;
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}
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$requestUniqueIdentifier = md5(serialize([$data, $params]));
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if (! isset($_REQUEST[$requestUniqueIdentifier])) {
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// generate the html output
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$urlParts = parse_url($_SERVER['REQUEST_URI']);
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$path = isset($urlParts['path']) ? $urlParts['path'] : '/';
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if (isset($urlParts['query'])) {
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parse_str($urlParts['query'], $pageParams);
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} else {
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$pageParams = [];
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}
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if (isset($_GET['page'])) {
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$pageParams['page'] = $_GET['page'];
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}
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$pageParams[$requestUniqueIdentifier] = '1';
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$pageParamStr = http_build_query($pageParams, null, '&');
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$fileLink = $path . '?' . $pageParamStr;
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$smartyLib->assign('param', $params);
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$files = [];
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if (! empty($range)) {
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$rangeFormat = preg_match("/^\d+\-\d+$/", $range);
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if ($rangeFormat !== 1) {
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Feedback::error(tr('File ID %0 preview contains an invalid range parameter.', $fileId));
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} else {
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$pageIterator = explode('-', $range)[0];
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$lastPage = explode('-', $range)[1];
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while ($pageIterator <= $lastPage) {
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$files[] = $fileLink . "&previewPage=" . $pageIterator;
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$pageIterator++;
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}
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}
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} else {
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$files[] = $fileLink;
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}
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$smartyLib->assign('files', $files);
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if ((isset($params['download']) && $params['download'] === 1)) {
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$tikilib = TikiLib::lib('tiki');
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$smartyLib->assign('original_file_download_link', $tikilib->tikiUrl() . 'tiki-download_file.php?fileId=' . $fileId, true);
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}
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return $smartyLib->fetch('wiki-plugins/wikiplugin_preview.tpl');
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}
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$filePath = $file->getWrapper()->getReadableFile();
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$fileMd5 = $file->getWrapper()->getChecksum();
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while (ob_get_level() > 1) {
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ob_end_clean();
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} // Be sure output buffering is turned off
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/** @var Cachelib $cacheLib */
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$cacheLib = TikiLib::lib('cache');
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$cacheName = $fileMd5 . $requestUniqueIdentifier;
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$previewPage = isset($_GET['previewPage']) ? $_GET['previewPage'] : null;
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if ($previewPage) {
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$cacheName .= "_" . $previewPage;
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}
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$cacheType = 'wp_preview_' . $fileId . '_';
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$buildContent = true;
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$content = null;
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$contentType = null;
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$content_temp = $cacheLib->getCached($cacheName, $cacheType);
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if ($content_temp && $content_temp !== serialize(false) && $content_temp != "") {
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$buildContent = false;
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$pos = strpos($content_temp, ';');
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$contentType = substr($content_temp, 0, $pos);
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$content = substr($content_temp, $pos + 1);
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}
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unset($content_temp);
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if ($buildContent) {
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$newFileExtension = $animation ? '.gif' : '.png';
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$newFilePath = $tikipath . DIRECTORY_SEPARATOR
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. 'temp' . DIRECTORY_SEPARATOR
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. 'cache' . DIRECTORY_SEPARATOR
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. $tikidomain . DIRECTORY_SEPARATOR
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. 'target_' . $cacheType . $cacheName . $newFileExtension;
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// This will allow apps executed by Alchemy (like when converting doc to pdf) to have a writable home
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// save existing ENV
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$envHomeDefined = isset($_ENV) && array_key_exists('HOME', $_ENV);
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if ($envHomeDefined) {
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$envHomeCopy = $_ENV['HOME'];
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}
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// set a proper home folder
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$_ENV['HOME'] = $tikipath . DIRECTORY_SEPARATOR . 'temp' . DIRECTORY_SEPARATOR . 'cache' . DIRECTORY_SEPARATOR . $tikidomain;
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AlchemyLib::hintMimeTypeByFilePath($filePath, $file->filetype);
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$alchemy = new AlchemyLib();
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$contentType = $alchemy->convertToImage($filePath, $newFilePath, $width, $height, $animation, $previewPage);
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// Restore the environment
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if ($envHomeDefined) {
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$_ENV['HOME'] = $envHomeCopy;
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} else {
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unset($_ENV['HOME']);
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}
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if (file_exists($newFilePath)) {
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$content = file_get_contents($newFilePath);
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}
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unlink($newFilePath);
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if (empty($content)) {
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exit;
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}
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$cacheLib->cacheItem($cacheName, $contentType . ';' . $content, $cacheType);
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}
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session_write_close(); // close the session in case of large transcode/downloads to enable further browsing
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// Compression of the stream may corrupt files on windows
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ini_set('zlib.output_compression', 'Off');
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header("Expires: 0");
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header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
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header("Cache-Control: private", false);
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header('Content-Length: ' . strlen($content));
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header('Content-Type: ' . $contentType);
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header('Content-Disposition: inline; filename="' . $fileMd5 . '";');
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header('Connection: close');
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header('Content-Transfer-Encoding: binary');
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echo $content;
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exit;
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}
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