Wallogit.com
2017 © Pedro Peláez
Set of classes that help to create chains of steps to minimize clutter in domain logic., (*1)
composer require aambr/phpchain, (*2)
$dispatcher = new ChainDispatcher($dependencyInjectionContainer);
$dispatcher->chain('user.register')->define([
'Steps\CreateUserStep', Steps\CreateProfileStep::class, 'sendWelcomeEmail'
]); // all of these will be resolved by dependency container unless
// there is a concrete ChainStep object ready
$dispatcher->chain('user.register')->dispatch()->execute(new \ArrayObject([
'username' => 'valid-username',
'email' => 'valid@email.com'
]));
ChainDispatcher accepts any depenendecy injection container which extends \ArrayObject to resolve
each step depenendecy., (*3)
The goal is to devide complex domain logic into individual steps that can be reused in future processes.
Create your own steps by inheriting ChainStep and implement logic in process(\ArrayObject $input)., (*4)
Steps can share variables between each other by altering $input keys, which is possible because we
are passing \ArrayObject instance reference instead an array which is passed by value. For example
CreateUserStep after successful action can set $input['user'] = $createdUser, which then can be used
by sendWelcomeEmail., (*5)