mirror of https://github.com/nextcloud/bookmarks
113 lines
3.1 KiB
PHP
113 lines
3.1 KiB
PHP
<?php
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/*
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* Copyright (c) 2020-2024. The Nextcloud Bookmarks contributors.
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*
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* This file is licensed under the Affero General Public License version 3 or later. See the COPYING file.
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*/
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namespace OCA\Bookmarks\Service;
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use OCA\Bookmarks\Contract\IBookmarkPreviewer;
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use OCA\Bookmarks\Contract\IImage;
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use OCA\Bookmarks\Db\Bookmark;
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use OCA\Bookmarks\Image;
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use OCA\Bookmarks\Service\Previewers\DefaultBookmarkPreviewer;
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use OCA\Bookmarks\Service\Previewers\PageresBookmarkPreviewer;
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use OCA\Bookmarks\Service\Previewers\ScreeenlyBookmarkPreviewer;
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use OCA\Bookmarks\Service\Previewers\ScreenshotMachineBookmarkPreviewer;
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use OCP\Files\NotFoundException;
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use OCP\Files\NotPermittedException;
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use OCP\IConfig;
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class BookmarkPreviewer implements IBookmarkPreviewer {
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// Cache for one month
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public const CACHE_TTL = 4 * 4 * 7 * 24 * 60 * 60;
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/**
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* @var string
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*/
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private $enabled;
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/**
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* @var DefaultBookmarkPreviewer
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*/
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private $defaultPreviewer;
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/**
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* @var ScreeenlyBookmarkPreviewer
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*/
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private $screeenlyPreviewer;
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/**
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* @var FileCache
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*/
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private $cache;
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/**
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* @var Previewers\ScreenshotMachineBookmarkPreviewer
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*/
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private $screenshotMachinePreviewer;
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/**
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* @var Previewers\PageresBookmarkPreviewer
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*/
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private $pageresPreviewer;
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/**
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* @param IConfig $config
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* @param ScreeenlyBookmarkPreviewer $screeenlyPreviewer
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* @param DefaultBookmarkPreviewer $defaultPreviewer
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* @param FileCache $cache
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* @param Previewers\ScreenshotMachineBookmarkPreviewer $screenshotMachinePreviewer
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* @param Previewers\PageresBookmarkPreviewer $pageresPreviewer
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*/
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public function __construct(IConfig $config, ScreeenlyBookmarkPreviewer $screeenlyPreviewer, DefaultBookmarkPreviewer $defaultPreviewer, FileCache $cache, ScreenshotMachineBookmarkPreviewer $screenshotMachinePreviewer, PageresBookmarkPreviewer $pageresPreviewer) {
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$this->screeenlyPreviewer = $screeenlyPreviewer;
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$this->defaultPreviewer = $defaultPreviewer;
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$this->screenshotMachinePreviewer = $screenshotMachinePreviewer;
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$this->pageresPreviewer = $pageresPreviewer;
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$this->enabled = $config->getAppValue('bookmarks', 'privacy.enableScraping', 'false');
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$this->cache = $cache;
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}
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/**
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* @param Bookmark $bookmark
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* @return IImage
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*/
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public function getImage($bookmark): ?IImage {
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if ($this->enabled === 'false') {
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return null;
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}
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if (!isset($bookmark)) {
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return null;
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}
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if (!$bookmark->isWebLink()) {
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return null;
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}
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$previewers = [$this->screeenlyPreviewer, $this->screenshotMachinePreviewer, $this->pageresPreviewer, $this->defaultPreviewer];
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foreach ($previewers as $previewer) {
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$key = $previewer::CACHE_PREFIX . '-' . md5($bookmark->getUrl());
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// Try cache first
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try {
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if ($image = $this->cache->get($key)) {
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if ($image === 'null') {
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continue;
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}
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return Image::deserialize($image);
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}
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} catch (NotFoundException $e) {
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} catch (NotPermittedException $e) {
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}
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$image = $previewer->getImage($bookmark);
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if (isset($image)) {
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$this->cache->set($key, $image->serialize(), self::CACHE_TTL);
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return $image;
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}
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$this->cache->set($key, 'null', self::CACHE_TTL);
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}
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return null;
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}
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}
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