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<?php
/* --------------------------------------------------------------
   ShipcloudWebhookController.inc.php 2018-01-29
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2017 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

class ShipcloudWebhookController extends HttpViewController
{
    /**
     * @var \LanguageTextManager
     */
    protected $text;
    
    /**
     * @var \ShipcloudLogger
     */
    protected $logger;
    
    protected function init()
    {
        $this->text = MainFactory::create('LanguageTextManager', 'shipcloud', $_SESSION['language_id']);
        $this->logger = MainFactory::create('ShipcloudLogger');
    }
    
    public function actionDefault()
    {
        try
        {
            $rawInput = file_get_contents('php://input');
            $this->logger->debug_notice(
                sprintf(
                    "WEBHOOK called from %s, body:\n%s",
                    $_SERVER['REMOTE_ADDR'],
                    $rawInput
                )
            );
            $webhookData = json_decode($rawInput, true);
            if(json_last_error()  !== JSON_ERROR_NONE)
            {
                throw new ShipcloudWebhookException('invalid input');
            }
            
            if(isset($webhookData['data']['object_type']) && $webhookData['data']['object_type'] === 'shipment')
            {
                $shipmentId = $webhookData['data']['id'];
                $shipmentUrl = $webhookData['data']['url'];
            }
            else
            {
                throw new ShipcloudWebhookException('unsupported object_type');
            }
            
            try
            {
                $shipmentsRequest = MainFactory::create('ShipcloudRestRequest', 'GET', $shipmentUrl);
                $restService      = MainFactory::create('ShipcloudRestService');
                $result           = $restService->performRequest($shipmentsRequest);
            }
            catch (RestException $e)
            {
                throw new ShipcloudWebhookException($e->getMessage());
            }
            
            $shipmentData     = json_decode($result->getResponseBody(), true);
            if(json_last_error() !== JSON_ERROR_NONE)
            {
                throw new ShipcloudWebhookException('could not retrieve shipment data');
            }
            
            if($result->getResponseCode() !== 200)
            {
                throw new ShipcloudWebhookException('Error retrieving shipment data - ' . $result->getResponseCode());
            }

            if(empty($shipmentData['reference_number']))
            {
                throw new ShipcloudWebhookException('Shipment referenced in webhook notification does not have a reference_number');
            }
            $orderId = new IdType((int)$shipmentData['reference_number']);
            
            $this->logger->notice(
                sprintf(
                    'WEBHOOK %s/%s for order %s',
                        $webhookData['id'],
                        $webhookData['type'],
                        (string)$orderId->asInt()
                )
            );
            
            $this->processWebhookEvent($orderId, new StringType($webhookData['type']));
            
            $responseData  = [
                'result' => 'OK',
            ];
        }
        catch (ShipcloudWebhookException $e)
        {
            $this->logger->notice('ERROR handling webhook event: ' . $e->getMessage());
            $responseData = [
                'result' => 'ERROR',
                'errors' => [
                    $e->getMessage(),
                ]
            ];
            
        }
        catch (UnexpectedValueException $e)
        {
            $this->logger->notice('ERROR handling webhook event: ' . $e->getMessage());
            $responseData = [
                'result' => 'ERROR',
                'errors' => [
                    $e->getMessage(),
                ]
            ];
        }
        
        $response = MainFactory::create('JsonHttpControllerResponse', $responseData, ['Content-Type: application/json']);
        return $response;
    }
    
    protected function processWebhookEvent(IdType $orderId, StringType $eventType)
    {
        $knownTypes = [
            'shipment.tracking.label_created',
            'shipment.tracking.picked_up',
            'shipment.tracking.transit',
            'shipment.tracking.out_for_delivery',
            'shipment.tracking.delivered',
            'shipment.tracking.awaits_pickup_by_receiver',
            'shipment.tracking.canceled',
            'shipment.tracking.delayed',
            'shipment.tracking.exception',
            'shipment.tracking.not_delivered',
            'shipment.tracking.destroyed',
            'shipment.tracking.notification',
            'shipment.tracking.unknown',
        ];
        /** @var \OrderWriteService $orderWrite */
        $orderWrite = StaticGXCoreLoader::getService('OrderWrite');
        /** @var \OrderReadService $orderRead */
        $orderRead  = StaticGXCoreLoader::getService('OrderRead');
        $oldOrderStatusId = new IdType($orderRead->getOrderById($orderId)->getStatusId());
        
        if(in_array($eventType->asString(), $knownTypes, true))
        {
            /** @var \ShipcloudConfigurationStorage $configuration */
            $configuration = MainFactory::create('ShipcloudConfigurationStorage');
            $orderStatusConfigurationKey = str_replace('.', '_', $eventType->asString());
            $orderStatusConfigurationKey = str_replace('shipment_', '', $orderStatusConfigurationKey);
            $orderStatusId = (int)$configuration->get('webhook/order_status_' . $orderStatusConfigurationKey);
            $historyComment = $this->text->get_text('webhook_event_' .
                                                    str_replace('.', '_', $eventType->asString()));
        }
        else
        {
            $orderStatusId = -1; // do not change
            $historyComment = $this->text->get_text('webhook_event_eventtype_unsupported') . ': ' . $eventType->asString();
        }
        if($orderStatusId >= 0) {
            $newOrderStatusId = new IdType($orderStatusId);
        }
        else
        {
            $newOrderStatusId = $oldOrderStatusId;
        }
        $orderWrite->updateOrderStatus($orderId, $newOrderStatusId, new StringType($historyComment), new BoolType(false));
    }
}

class ShipcloudWebhookException extends RuntimeException {}