nextcloud/lib/private/InitialStateService.php

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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC;
use Closure;
use OCP\IInitialStateService;
use OCP\ILogger;
class InitialStateService implements IInitialStateService {
/** @var ILogger */
private $logger;
/** @var string[][] */
private $states = [];
/** @var Closure[][] */
private $lazyStates = [];
public function __construct(ILogger $logger) {
$this->logger = $logger;
}
public function provideInitialState(string $appName, string $key, $data): void {
// Scalars and JsonSerializable are fine
if (is_scalar($data) || $data instanceof \JsonSerializable || is_array($data)) {
if (!isset($this->states[$appName])) {
$this->states[$appName] = [];
}
$this->states[$appName][$key] = json_encode($data);
return;
}
$this->logger->warning('Invalid data provided to provideInitialState by ' . $appName);
}
public function provideLazyInitialState(string $appName, string $key, Closure $closure): void {
if (!isset($this->lazyStates[$appName])) {
$this->lazyStates[$appName] = [];
}
$this->lazyStates[$appName][$key] = $closure;
}
/**
* Invoke all callbacks to populate the `states` property
*/
private function invokeLazyStateCallbacks(): void {
foreach ($this->lazyStates as $app => $lazyStates) {
foreach ($lazyStates as $key => $lazyState) {
$startTime = microtime(true);
$this->provideInitialState($app, $key, $lazyState());
$endTime = microtime(true);
$duration = $endTime - $startTime;
if ($duration > 1) {
$this->logger->warning('Lazy initial state provider for {key} took {duration} seconds.', [
'app' => $app,
'key' => $key,
'duration' => round($duration, 2),
]);
}
}
}
$this->lazyStates = [];
}
public function getInitialStates(): array {
$this->invokeLazyStateCallbacks();
$appStates = [];
foreach ($this->states as $app => $states) {
foreach ($states as $key => $value) {
$appStates["$app-$key"] = $value;
}
}
return $appStates;
}
}