rezzza / ruler-bundle
A simple stateless production rules engine for Symfony 2.
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Type:symfony-bundle
Requires
- php: >=5.4.0
- hoa/ruler: ~1.0
- symfony/framework-bundle: ~2.1
This package is not auto-updated.
Last update: 2024-11-20 11:10:21 UTC
README
A simple stateless production rules engine for Symfony 2.
Integration of Hoa\Ruler library.
Roadmap
- Create dynamically Propositions via a Form and persist them on storage.
- Dynamics inferences
Configuration
rezzza_ruler: context_builder: service.id # or #context_builder: # default: service.id events: event.cart.paid: 'Cart paid' # or event.cart.paid: label: 'Cart paid' context_builder: default inferences: cart.price_total: # This will show this inferences only when event event.cart.paid # will be selected on UI. # This is optional. event: [event.cart.paid] type: decimal description: Cart total price is cart.created_at: type: date description: Cart was created at cart.contain_product: type: product # Your own type # You'll return a list of product as array. # Not yet implemented, we'll have to finish ui via forms. description: Cart contain product
Usage
<?php $rb = $container->get('rezzza.ruler.rule_builder'); $rule = $rb->and( $rb->{'>='}($rb->variable('cart.price_total'), 100), $rb->{'>='}($rb->context('cart.created_at'), '2011-06-10') ); $context = $container->get('rezzza.ruler.context_builder')->createContext('default'); $context = $container->get('rezzza.ruler.context_builder')->createContextFromEvent('event.cart.paid'); echo $container->get('rezzza.ruler')->assert($rule, $context); // true or false
Serialization
To store rules on a storage, you can serialize it, store it on storage, fetch it from storage, and deserialize it. Context does not stay on storage.
$rb = $container->get('rezzza.ruler.rule_builder'); $rule = $rb->and( $rb->{'>='}($rb->context('cart.price_total'), 100), $rb->{'>='}($rb->context('cart.created_at'), '2011-06-10') ); $string = (string) $rule; // cart.price.total >= 100 AND cart.created_at >= 2011-06-10 $rule = $container->get('rezzza.ruler')->interprete($string);
Add custom functions
Define a service with rezzza.ruler.functions
tag.
<service id="acme.ruler.functions" class="Acme\Ruler\Functions"> <tag name="rezzza.ruler.functions" /> </service>
Then the php class:
<?php namespace Acme\Ruler\Functions; use Rezzza\RulerBundle\Ruler\FunctionCollectionInterface; class FunctionCollection implements FunctionCollectionInterface { public function getFunctions() { return array( 'version_compare' => function($left, $comparator, $right) { return version_compare($left, $comparator, $right); }, ); } }
That's all folks !
Glossary
- Inference: A group of proposition
- Proposition: A rule attached to an inference.
Any idea, suggestion ? Create an issue.