CommandBus::createExecutionChain() - Code Metrics - thephpleague/tactician - Measure and Improve Code Quality continuously with Scrutinizer

CommandBus::createExecutionChain() A
last analyzed 2020-12-08 22:38 UTC

↳ Parent: CommandBus

Complexity

Conditions	2
Paths	2

Size

Total Lines	9
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	2

Importance

Changes	2
Bugs	0	Features	0

Metric	Value
cc	2
eloc	4
c	2
b	0
f	0
nc	2
nop	1
dl	0
loc	9
ccs	5
cts	5
cp	1
crap	2
rs	10

<?php

declare(strict_types=1);

namespace League\Tactician;

use Closure;

use function array_pop;

/**
 * Receives a command and sends it through a chain of middleware for processing.
 */
final class CommandBus
{
    /** @var Closure(object $command):mixed */
    private Closure $middlewareChain;

    public function __construct(Middleware ...$middleware)
    {
        $this->middlewareChain = $this->createExecutionChain($middleware);
    }

    /**
     * Executes the given command and optionally returns a value
     *
     * @return mixed
     */
    public function handle(object $command)
    {
        return ($this->middlewareChain)($command);
    }

    /**
     * @param Middleware[] $middlewareList
     */
    private function createExecutionChain(array $middlewareList): Closure
    {
        $lastCallable = static fn () => null;

        while ($middleware = array_pop($middlewareList)) {
            $lastCallable = static fn (object $command) => $middleware->execute($command, $lastCallable);
        }

        return $lastCallable;
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace League\Tactician;
6
7		use Closure;
8
9		use function array_pop;
10
11		/**
12		* Receives a command and sends it through a chain of middleware for processing.
13		*/
14		final class CommandBus
15		{
16		/** @var Closure(object $command):mixed */
17		private Closure $middlewareChain;
18
19	3	public function __construct(Middleware ...$middleware)
20		{
21	3	$this->middlewareChain = $this->createExecutionChain($middleware);
22	3	}
23
24		/**
25		* Executes the given command and optionally returns a value
26		*
27		* @return mixed
28		*/
29	3	public function handle(object $command)
30		{
31	3	return ($this->middlewareChain)($command);
32		}
33
34		/**
35		* @param Middleware[] $middlewareList
36		*/
37	3	private function createExecutionChain(array $middlewareList): Closure
38		{
39	3	$lastCallable = static fn () => null;
40
41	3	while ($middleware = array_pop($middlewareList)) {
42	2	$lastCallable = static fn (object $command) => $middleware->execute($command, $lastCallable);
43		}
44
45	3	return $lastCallable;
46		}
47		}
48

thephpleague / tactician

CommandBus::createExecutionChain() A last analyzed 2020-12-08 22:38 UTC

Complexity

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CommandBus::createExecutionChain() A
last analyzed 2020-12-08 22:38 UTC