mirror of https://github.com/friendica/friendica
118 lines
3.5 KiB
PHP
118 lines
3.5 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2023, 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\KeyValueStorage\Type;
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use Friendica\Core\PConfig\Util\ValueConversion;
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use Friendica\Core\KeyValueStorage\Exceptions\KeyValueStoragePersistenceException;
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use Friendica\Database\Database;
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/**
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* A Key-Value storage provider with DB as persistence layer
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*/
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class DBKeyValueStorage extends AbstractKeyValueStorage
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{
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const DB_KEY_VALUE_TABLE = 'key-value';
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/** @var Database */
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protected $database;
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public function __construct(Database $database)
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{
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$this->database = $database;
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}
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/** {@inheritDoc} */
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public function offsetExists($offset): bool
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{
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try {
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return $this->database->exists(self::DB_KEY_VALUE_TABLE, ['k' => $offset]);
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} catch (\Exception $exception) {
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throw new KeyValueStoragePersistenceException(sprintf('Cannot check storage with key %s', $offset), $exception);
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}
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}
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/** {@inheritDoc} */
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#[\ReturnTypeWillChange]
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public function offsetGet($offset)
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{
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try {
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$result = $this->database->selectFirst(self::DB_KEY_VALUE_TABLE, ['v'], ['k' => $offset]);
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if ($this->database->isResult($result)) {
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$value = ValueConversion::toConfigValue($result['v']);
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// just return it in case it is set
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if (isset($value)) {
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return $value;
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}
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}
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} catch (\Exception $exception) {
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throw new KeyValueStoragePersistenceException(sprintf('Cannot get value for key %s', $offset), $exception);
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}
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return null;
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}
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/** {@inheritDoc} */
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#[\ReturnTypeWillChange]
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public function offsetSet($offset, $value)
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{
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try {
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// We store our setting values in a string variable.
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// So we have to do the conversion here so that the compare below works.
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// The exception are array values.
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$compare_value = (!is_array($value) ? (string)$value : $value);
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$stored_value = $this->get($offset);
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if (isset($stored_value) && ($stored_value === $compare_value)) {
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return;
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}
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$dbValue = ValueConversion::toDbValue($value);
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$return = $this->database->update(self::DB_KEY_VALUE_TABLE, [
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'v' => $dbValue,
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'updated_at' => time()
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], ['k' => $offset], true);
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if (!$return) {
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throw new \Exception(sprintf('database update failed: %s', $this->database->errorMessage()));
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}
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} catch (\Exception $exception) {
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throw new KeyValueStoragePersistenceException(sprintf('Cannot set value for %s for key %s', $value, $offset), $exception);
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}
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}
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/** {@inheritDoc} */
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#[\ReturnTypeWillChange]
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public function offsetUnset($offset)
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{
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try {
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if (!$this->database->delete(self::DB_KEY_VALUE_TABLE, ['k' => $offset])) {
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throw new \Exception(sprintf('database deletion failed: %s', $this->database->errorMessage()));
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}
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} catch (\Exception $exception) {
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throw new KeyValueStoragePersistenceException(sprintf('Cannot delete value with key %s', $offset), $exception);
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}
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}
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}
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