Borobudur\Bus\Bus

Complexity

Total Complexity

28

Size/Duplication

Total Lines	219
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Importance

Changes

0

16 Methods

Rating	Name	Duplication	Size	Complexity
A	getName()	0	4	1
A	setMethod()	0	4	1
A	getGate()	0	4	1
A	setGate()	0	4	1
A	setHandler()	0	4	1
A	registers()	0	6	2
A	register()	0	4	1
A	isRegistered()	0	4	1
A	dispatch()	0	4	1
A	dispatchNow()	0	9	2
A	invoke()	0	11	2
A	handle()	0	8	2
A	assertValidHandler()	0	12	3
A	assertValidObjectHandler()	0	6	3
A	buildClassString()	0	8	2
A	buildHandler()	0	15	4

<?php
/*
 * This file is part of the Borobudur-Bus package.
 *
 * (c) Hexacodelabs <http://hexacodelabs.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Borobudur\Bus;

use Borobudur\Bus\Exception\LogicException;
use Borobudur\Bus\Message\MessageInterface;

/**
 * @author      Iqbal Maulana <iq.bluejack@gmail.com>
 * @created     8/17/15
 */
class Bus implements BusInterface
{
    /**
     * @var GateInterface
     */
    protected $gate;

    /**
     * @var mixed
     */
    protected $handler;

    /**
     * @var array
     */
    protected $messages = array();

    /**
     * @var string
     */
    protected $method = 'handle';

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return 'bus';
    }

    /**
     * {@inheritdoc}
     */
    public function setMethod($method)
    {
        $this->method = $method;
    }

    /**
     * {@inheritdoc}
     */
    public function getGate()
    {
        return $this->gate;
    }

    /**
     * {@inheritdoc}
     */
    public function setGate(GateInterface $gate)
    {
        $this->gate = $gate;
    }

    /**
     * {@inheritdoc}
     */
    public function setHandler($handler)
    {
        $this->handler = $handler;
    }

    /**
     * Register messages.
     *
     * @param array $messages
     */
    public function registers(array $messages)
    {
        foreach ($messages as $message => $handler) {
            $this->register($message, $handler);
        }
    }

    /**
     * {@inheritdoc}
     */
    public function register($message, $handler)
    {
        $this->messages[ltrim($message, '\\')] = $handler;
    }

    /**
     * {@inheritdoc}
     */
    public function isRegistered(MessageInterface $message)
    {
        return array_key_exists(get_class($message), $this->messages);
    }

    /**
     * {@inheritdoc}
     */
    public function dispatch(MessageInterface $message)
    {
        return $this->dispatchNow($message);
    }
    
    /**
     * {@inheritdoc}
     */
    public function dispatchNow(MessageInterface $message)
    {
        $class = ltrim(get_class($message), '\\');
        if (!isset($this->messages[$class])) {
            throw new LogicException(sprintf('Message "%s" does not have handler.', $class));
        }
    
        return $this->invoke($message, $this->messages[$class], $class);
    }

    /**
     * Invoke message.
     *
     * @param MessageInterface $message
     * @param mixed            $handler
     * @param string           $class
     *
     * @return mixed
     */
    protected function invoke(MessageInterface $message, $handler, $class)
    {
        if (null !== $this->handler) {
            return call_user_func_array($this->handler, func_get_args());
        }

        $handler = $this->buildHandler($handler);
        $this->assertValidHandler($class, $handler);

        return $this->handle($message, $handler);
    }

    /**
     * Default dispatcher for message.
     *
     * @param MessageInterface $message
     * @param mixed            $handler
     *
     * @return mixed
     */
    protected function handle(MessageInterface $message, $handler)
    {
        if (!is_callable($handler)) {
            return call_user_func(array($handler, $this->method), $message);
        }

        return call_user_func($handler, $message);
    }

    /**
     * Assert valid handler.
     *
     * @param string $class
     * @param mixed  $handler
     */
    protected function assertValidHandler($class, $handler)
    {
        if (!is_callable($handler) && !is_object($handler)) {
            throw new LogicException(sprintf(
                'Handler for message "%s" should be callable or object, but got "%s".',
                $class,
                gettype($handler)
            ));
        }

        $this->assertValidObjectHandler($handler);
    }

    /**
     * Assert valid object handler.
     *
     * @param mixed $handler
     */
    protected function assertValidObjectHandler($handler)
    {
        if (!is_callable($handler) && !method_exists($handler, $this->method)) {
            throw new LogicException(sprintf('Object handler should have method "->%s()".', $this->method));
        }
    }

    /**
     * Build class from string.
     *
     * @param string $class
     *
     * @return mixed|null
     */
    protected function buildClassString($class)
    {
        if (class_exists($class)) {
            return new $class();
        }

        return null;
    }

    /**
     * Build handler.
     *
     * @param mixed $handler
     *
     * @return mixed|null
     */
    protected function buildHandler($handler)
    {
        if (is_callable($handler)) {
            return $handler;
        }

        if (is_string($handler)) {
            $class = '\\' . ltrim($handler, '\\');
            if (null !== $object = $this->buildClassString($class)) {
                return $object;
            }
        }

        return $handler;
    }
}