ww/damascus

A middlewares library

Damascus

A simple middlewares implementation in php. Like Damascus Steel, this is about layers, _(*1)

Installation

composer require ww/damascus

Basic Usage

1. Create Middlewares

class IncFooMiddleware implements Damascus\MiddlewareInterface
{
    public function run(Damascus\DataBucketInterface $dataBucket, MiddlewareStep $next)
    {
        $dataBucket['foo'] += rand(0,12);

        if ($dataBucket['foo'] < 10) {
            $next->run($dataBucket);
        }
    }
}

class MailerMiddleware implements Damascus\MiddlewareInterface
{
    private $mailer;

    //I'm not coding the constructor of this

    public function run(Damascus\DataBucketInterface $dataBucket, MiddlewareStep $next)
    {
        $this->mailer->send($dataBucket['from'], $dataBucket['to'], $dataBucket['subject'], $dataBucket['body']);
    }
}

2. Push middlewares to a stack

$middleware = ;
$stack = (new Damascus\MiddlewareStack())
    ->pushMiddleware(new IncFooMiddleware())
    ->pushMiddleware(new MailerMiddleware());

3. Start the forgery

$dataBucket = new Damascus\DataBucket([
    'from' => 'asdf@gmail.com',
    'to' => 'asdf@gmail.com',
    'subject' => 'threshold 10 not reached',
    'body' => 'threshold 10 not reached',
    'foo' => 0,
]);

$stack->run($dataBucket);

Advanced topics

• Create so many middlewares as you need. You can use DIC to reuse them and to add them dependencies.
• You can use DIC also to reuse a middlewares stack.
• You can create your custom DataBucketInterface as you want with the data you need, and ensure is the right one in your middlewares.

Future

I would like to create in a near future a Symfony bundle for this, allowing, using DIC tags to automatically generate middleware stacks., _(*2)