Satisfaction

Satisfaction is a PHP implementation of the Specification pattern for DDD.

Purpose

The aim of the specification pattern is to write domain specifications in reusable classes instead of dispatching domain rules conditons in all your project.

Installation

composer require maximecolin/satisfaction

Usage

Simple example

My model :

class Article
{
	public $published = false;
	public $publishedAt;
}

My specification :

use Satisfaction\CompositeSpecification;

class PublishedArticle extends CompositeSpecification
{
	public function isSatisfiedBy($article)
	{
		return $article->published === true && $article->publishedAt <= new \DateTime();
	}
}

I want to know if an article is published :

$specicification = new PublishedArticle();

if ($specification->isSatisfiedBy($article)) {
	// Do something
}

Or, And, Not

You can chain specifications with "or", "and" or "not" condition.

// If both foo and bar are satified
if ((new FooSpecification())->andX(new BarSpecification())->isSatifiedBy($object)) {
	// Do something
}

// If foo is satisfied or bar is not
if ((new FooSpecification())->orX((new BarSpecification())->not())->isSatifiedBy($object)) {
	// Do something
}

Author

Maxime Colin <www.maximecolin.fr>

Licence

See the LICENCE file.

Acknowledgements

Thanks to Jean-François Lépine for his talk about DDD.