Use native taggable file backend
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<?php
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namespace DanielSiepmann\DsSite\Cache\Backend;
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/*
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* Copyright (C) 2020 Daniel Siepmann <coding@daniel-siepmann.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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use TYPO3\CMS\Core\Cache\Backend\FileBackend as CoreFileBackend;
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use TYPO3\CMS\Core\Cache\Backend\TaggableBackendInterface;
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use TYPO3\CMS\Core\Utility\GeneralUtility;
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class TaggableFileBackend extends CoreFileBackend implements TaggableBackendInterface
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{
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public function flushByTag($tag)
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{
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array_walk($this->findIdentifiersByTag($tag), [$this, 'remove']);
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}
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public function flushByTags(array $tags)
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{
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foreach ($tags as $tag) {
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$this->flushByTag($tag);
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}
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}
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public function findIdentifiersByTag($tag)
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{
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$files = GeneralUtility::getFilesInDir($this->getCacheDirectory() . 'tag-' . $tag);
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if ($files === []) {
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return [];
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}
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return array_values($files);
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}
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public function set($entryIdentifier, $data, array $tags = [], $lifetime = null)
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{
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parent::set($entryIdentifier, $data, $tags, $lifetime);
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foreach ($tags as $tag) {
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$folder = $this->getCacheDirectory() . 'tag-' . $tag;
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if (!is_dir($folder)) {
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GeneralUtility::mkdir_deep($folder);
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}
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touch($folder . DIRECTORY_SEPARATOR . $entryIdentifier);
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}
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file_put_contents(
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$this->getCacheDirectory() . $entryIdentifier . '-tags',
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serialize($tags)
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);
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}
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public function remove($entryIdentifier)
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{
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$pathAndFilename = $this->getCacheDirectory() . $entryIdentifier . '-tags';
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if (file_exists($pathAndFilename)) {
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$tags = unserialize(file_get_contents($pathAndFilename));
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foreach ($tags as $tag) {
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$tagFile = $this->getCacheDirectory() . 'tag-' . $tag . DIRECTORY_SEPARATOR . $entryIdentifier;
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file_exists($tagFile) && unlink($tagFile);
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}
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}
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return parent::remove($entryIdentifier);
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}
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}
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