mirror of https://github.com/friendica/friendica
141 lines
3.2 KiB
PHP
141 lines
3.2 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* 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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Core\Cache\Type;
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use Friendica\Core\Cache\Enum\Duration;
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use Friendica\Core\Cache\ICache;
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use Friendica\Core\Cache\Enum\Type;
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use Friendica\Database\Database;
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use Friendica\Util\DateTimeFormat;
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/**
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* Database Cache
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*/
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class DatabaseCache extends BaseCache implements ICache
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{
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/**
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* @var Database
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*/
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private $dba;
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public function __construct(string $hostname, Database $dba)
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{
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parent::__construct($hostname);
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$this->dba = $dba;
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}
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/**
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* (@inheritdoc)
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*/
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public function getAllKeys($prefix = null)
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{
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if (empty($prefix)) {
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$where = ['`expires` >= ?', DateTimeFormat::utcNow()];
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} else {
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$where = ['`expires` >= ? AND `k` LIKE CONCAT(?, \'%\')', DateTimeFormat::utcNow(), $prefix];
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}
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$stmt = $this->dba->select('cache', ['k'], $where);
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$keys = [];
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while ($key = $this->dba->fetch($stmt)) {
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array_push($keys, $key['k']);
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}
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$this->dba->close($stmt);
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return $keys;
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}
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/**
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* (@inheritdoc)
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*/
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public function get($key)
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{
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$cache = $this->dba->selectFirst('cache', ['v'], ['`k` = ? AND (`expires` >= ? OR `expires` = -1)', $key, DateTimeFormat::utcNow()]);
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if ($this->dba->isResult($cache)) {
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$cached = $cache['v'];
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$value = @unserialize($cached);
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// Only return a value if the serialized value is valid.
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// We also check if the db entry is a serialized
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// boolean 'false' value (which we want to return).
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if ($cached === serialize(false) || $value !== false) {
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return $value;
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}
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}
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return null;
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}
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/**
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* (@inheritdoc)
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*/
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public function set($key, $value, $ttl = Duration::FIVE_MINUTES)
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{
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if ($ttl > 0) {
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$fields = [
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'v' => serialize($value),
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'expires' => DateTimeFormat::utc('now + ' . $ttl . 'seconds'),
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'updated' => DateTimeFormat::utcNow()
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];
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} else {
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$fields = [
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'v' => serialize($value),
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'expires' => -1,
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'updated' => DateTimeFormat::utcNow()
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];
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}
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return $this->dba->update('cache', $fields, ['k' => $key], true);
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}
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/**
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* (@inheritdoc)
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*/
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public function delete($key)
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{
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return $this->dba->delete('cache', ['k' => $key]);
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}
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/**
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* (@inheritdoc)
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*/
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public function clear($outdated = true)
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{
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if ($outdated) {
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return $this->dba->delete('cache', ['`expires` < NOW()']);
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} else {
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return $this->dba->delete('cache', ['`k` IS NOT NULL ']);
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}
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}
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/**
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* {@inheritDoc}
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*/
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public function getName()
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{
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return Type::DATABASE;
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}
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}
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