AsyncSockets\RequestExecutor\Pipeline\AbstractOobHandler

Complexity

Total Complexity

6

Size/Duplication

Total Lines	85
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	5

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	0

3 Methods

Rating	Name	Duplication	Size	Complexity
B	handle()	0	39	4
A	getInvokeState()	0	6	2
	handleOperation()	0	5	?

<?php
/**
 * Async sockets
 *
 * @copyright Copyright (c) 2015-2016, Efimov Evgenij <edefimov.it@gmail.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */
namespace AsyncSockets\RequestExecutor\Pipeline;

use AsyncSockets\Event\ReadEvent;
use AsyncSockets\Frame\RawFramePicker;
use AsyncSockets\Operation\OperationInterface;
use AsyncSockets\RequestExecutor\EventHandlerInterface;
use AsyncSockets\RequestExecutor\IoHandlerInterface;
use AsyncSockets\RequestExecutor\Metadata\RequestDescriptor;
use AsyncSockets\RequestExecutor\RequestExecutorInterface;

/**
 * Class AbstractOobHandler
 */
abstract class AbstractOobHandler implements IoHandlerInterface
{
    /**
     * Operation to descriptor state map
     *
     * @var array
     */
    private static $stateMap = [
        OperationInterface::OPERATION_READ  => RequestDescriptor::RDS_READ,
        OperationInterface::OPERATION_WRITE => RequestDescriptor::RDS_WRITE,
    ];

    /**
     * {@inheritdoc}
     */
    final public function handle(
        RequestDescriptor $descriptor,
        RequestExecutorInterface $executor,
        EventHandlerInterface $eventHandler
    ) {
        $result = null;

        if ($descriptor->hasState(RequestDescriptor::RDS_OOB)) {
            $descriptor->clearState(RequestDescriptor::RDS_OOB);

            $picker = new RawFramePicker();
            $socket = $descriptor->getSocket();
            $meta   = $descriptor->getMetadata();
            $frame  = $socket->read($picker, true);
            $event  = new ReadEvent(
                $executor,
                $socket,
                $meta[RequestExecutorInterface::META_USER_CONTEXT],
                $frame,
                true
            );
            $event->nextIs($descriptor->getOperation());
            $eventHandler->invokeEvent($event);

            $result = $event->getNextOperation();
            if ($event->getNextOperation() !== $descriptor->getOperation()) {
                return $result;
            }
        }

        $state = $this->getInvokeState($descriptor->getOperation());
        if ($descriptor->hasState($state)) {
            $descriptor->clearState($state);

            $result = $this->handleOperation($descriptor, $executor, $eventHandler);
        }

        return $result;
    }

    /**
     * Return state which should invoke this operation
     *
     * @param OperationInterface $operation Operation object
     *
     * @return int RequestDescriptor::RDS_* constant
     */
    private function getInvokeState(OperationInterface $operation)
    {
        $type = $operation->getType();

        return isset(self::$stateMap[$type]) ? self::$stateMap[$type] : 0;
    }

    /**
     * Process given operation
     *
     * @param RequestDescriptor        $descriptor Request descriptor
     * @param RequestExecutorInterface $executor Executor, processing operation
     * @param EventHandlerInterface    $eventHandler Event handler for this operation
     *
     * @return OperationInterface|null Next operation to pass in socket. Return null,
     *      if next operation is not required. Return $operation parameter, if operation is not completed yet
     */
    abstract protected function handleOperation(
        RequestDescriptor $descriptor,
        RequestExecutorInterface $executor,
        EventHandlerInterface $eventHandler
    );
}