$order = new Order(); // see below
$graph = new Graph(); // see below
$graph->apply($order, 'transition-input');
use SegfaultInc\Finite\Subject;
class Order extends Model implements Subject
{
public function setFiniteState($state)
{
$this->update([
'status' => $state,
]);
}
public function getFiniteState($state)
{
return $this->status;
}
}(new Graph)
->setStates([
State::initial('new')
->label('New')
->leaving(function (Order $order) {
// This is executed every time the `in_progress` is **transitioned from**.
// Useful if you want to do something that is "state" dependent
$order->update([
'started_at' => now()
]);
}),
State::normal('in_progress')
->label('In Progress'),
State::final('finished')
->label('Finised'),
State::final('canceled')
->label('Canceled')
->entering(function (Order $order) {
// If you transition to "canceled" state from multiple states,
// this is the place to perform the common logic
}),
])
->setTransitions([
Transition::make('new', 'in_progress', 'progress')
->pre(function (Order $order) {
if ($order->validate()) {
throw new OrderValidationException('When an exception is thrown in "pre" hook, the transition is not applied');
}
}),
Transition::make('in_progress', 'finished', 'progress'),
Transition::make('in_progress', 'canceled', 'cancel')
->post(function (Order $order) {
$order->user->notify(new YourOrderWasCanceled);
}),
]);$graph->visualize()
// uses GraphViz under the hood
