%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/*
* Copyright (c) 2020. The Nextcloud Bookmarks contributors.
*
* This file is licensed under the Affero General Public License version 3 or later. See the COPYING file.
*/
namespace OCA\Bookmarks\Service;
use OCA\Bookmarks\Contract\IBookmarkPreviewer;
use OCA\Bookmarks\Contract\IImage;
use OCA\Bookmarks\Db\Bookmark;
use OCA\Bookmarks\Image;
use OCA\Bookmarks\Service\Previewers\DefaultBookmarkPreviewer;
use OCA\Bookmarks\Service\Previewers\PageresBookmarkPreviewer;
use OCA\Bookmarks\Service\Previewers\ScreeenlyBookmarkPreviewer;
use OCA\Bookmarks\Service\Previewers\ScreenshotMachineBookmarkPreviewer;
use OCP\Files\NotFoundException;
use OCP\Files\NotPermittedException;
use OCP\IConfig;
class BookmarkPreviewer implements IBookmarkPreviewer {
// Cache for one month
public const CACHE_TTL = 4 * 4 * 7 * 24 * 60 * 60;
/**
* @var string
*/
private $enabled;
/**
* @var DefaultBookmarkPreviewer
*/
private $defaultPreviewer;
/**
* @var ScreeenlyBookmarkPreviewer
*/
private $screeenlyPreviewer;
/**
* @var FileCache
*/
private $cache;
/**
* @var Previewers\ScreenshotMachineBookmarkPreviewer
*/
private $screenshotMachinePreviewer;
/**
* @var Previewers\PageresBookmarkPreviewer
*/
private $pageresPreviewer;
/**
* @param IConfig $config
* @param ScreeenlyBookmarkPreviewer $screeenlyPreviewer
* @param DefaultBookmarkPreviewer $defaultPreviewer
* @param FileCache $cache
* @param Previewers\ScreenshotMachineBookmarkPreviewer $screenshotMachinePreviewer
* @param Previewers\PageresBookmarkPreviewer $pageresPreviewer
*/
public function __construct(IConfig $config, ScreeenlyBookmarkPreviewer $screeenlyPreviewer, DefaultBookmarkPreviewer $defaultPreviewer, FileCache $cache, ScreenshotMachineBookmarkPreviewer $screenshotMachinePreviewer, PageresBookmarkPreviewer $pageresPreviewer) {
$this->screeenlyPreviewer = $screeenlyPreviewer;
$this->defaultPreviewer = $defaultPreviewer;
$this->screenshotMachinePreviewer = $screenshotMachinePreviewer;
$this->pageresPreviewer = $pageresPreviewer;
$this->enabled = $config->getAppValue('bookmarks', 'privacy.enableScraping', 'false');
$this->cache = $cache;
}
/**
* @param Bookmark $bookmark
* @return IImage
*/
public function getImage($bookmark): ?IImage {
if ($this->enabled === 'false') {
return null;
}
if (!isset($bookmark)) {
return null;
}
if (!$bookmark->isWebLink()) {
return null;
}
$previewers = [$this->screeenlyPreviewer, $this->screenshotMachinePreviewer, $this->pageresPreviewer, $this->defaultPreviewer];
foreach ($previewers as $previewer) {
$key = $previewer::CACHE_PREFIX . '-' . md5($bookmark->getUrl());
// Try cache first
try {
if ($image = $this->cache->get($key)) {
if ($image === 'null') {
continue;
}
return Image::deserialize($image);
}
} catch (NotFoundException $e) {
} catch (NotPermittedException $e) {
}
$image = $previewer->getImage($bookmark);
if (isset($image)) {
$this->cache->set($key, $image->serialize(), self::CACHE_TTL);
return $image;
}
$this->cache->set($key, 'null', self::CACHE_TTL);
}
return null;
}
}
Zerion Mini Shell 1.0