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<?php
/*
 * Xibo - Digital Signage - http://www.xibo.org.uk
 * Copyright (C) 2015 Spring Signage Ltd
 *
 * This file (ApiStorage.php) is part of Xibo.
 *
 * Xibo 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
 * any later version.
 *
 * Xibo 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 Xibo.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace Xibo\Middleware;

use Slim\Helper\Set;
use Slim\Middleware;
use Xibo\Service\LogService;
use Xibo\Storage\PdoStorageService;
use Xibo\Storage\MySqlTimeSeriesStore;

/**
 * Class Storage
 * @package Xibo\Middleware
 */
class Storage extends Middleware
{
    public function call()
    {
        $app = $this->app;

$app->startTime = microtime(true);
        $app->commit = true;

// Configure storage
        self::setStorage($app->container);

$this->next->call();

// Are we in a transaction coming out of the stack?
        if ($app->store->getConnection()->inTransaction()) {
            // We need to commit or rollback? Default is commit
            if ($app->commit) {
                $app->store->commitIfNecessary();
            } else {

$app->logService->debug('Storage rollback.');

$app->store->getConnection()->rollBack();
            }
        }

// Get the stats for this connection
        $stats = $app->store->stats();
        $stats['length'] = microtime(true) - $app->startTime;
        $stats['memoryUsage'] = memory_get_usage();
        $stats['peakMemoryUsage'] = memory_get_peak_usage();

$app->logService->info('Request stats: %s.', json_encode($stats, JSON_PRETTY_PRINT));

$app->store->close();
    }

/**
     * Set Storage
     * @param Set $container
     */
    public static function setStorage($container)
    {
        // Register the log service
        $container->singleton('logService', function($container) {
            return new LogService($container->log, $container->mode);
        });

// Register the database service
        $container->singleton('store', function($container) {
            return (new PdoStorageService($container->logService))->setConnection();
        });

// Register the statistics database service
        $container->singleton('timeSeriesStore', function($container) {
            if ($container->configService->timeSeriesStore == null) {
                return (new MySqlTimeSeriesStore())
                    ->setDependencies($container->logService,
                        $container->dateService,
                        $container->layoutFactory,
                        $container->campaignFactory)
                    ->setStore($container->store);
            } else {
                $timeSeriesStore = $container->configService->timeSeriesStore;
                $timeSeriesStore = $timeSeriesStore();

return $timeSeriesStore->setDependencies(
                    $container->logService,
                    $container->dateService,
                    $container->layoutFactory,
                    $container->campaignFactory,
                    $container->mediaFactory,
                    $container->widgetFactory,
                    $container->displayFactory,
                    $container->displayGroupFactory
                );
            }
        });
    }
}