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SidLee\Flow-Manager

Library to assist in the creation and management of complex wizard flows in projects using Symfony2's HttpFoundation component.

Library Maintainers

• Daniel Petitclerc
• Andrew Moore

Usage

Creating a Step

In order to create a step, you must create a class implementing the interface SidLee\FlowManager\StepInterface. You may use SidLee\FlowManager\AbstractStep as a template if you wish.

use SidLee\FlowManager\AbstractStep;
use SidLee\FlowManager\NavigationResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

class WizardStartStep extends AbstractStep
{
    public function handleRequest(Request $request, NavigationResponse $navResponse, $data) {
        return new Response("Hello World");
    }
}

In order to cause a navigation within the flow, simply return a SidLee\FlowManager\NavigationResponse instead of a Symfony\Component\HttpFoundation\Response.

use SidLee\FlowManager\AbstractStep;
use SidLee\FlowManager\NavigationDirection;
use SidLee\FlowManager\NavigationResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

class WizardStartStep extends AbstractStep
{
    public function handleRequest(Request $request, NavigationResponse $navResponse, $data) {
        if($request->request->getAlpha('navigation') === 'NEXT') {
            return new NavigationResponse(NavigationDirection::NEXT());
        }
        return new Response("Hello World");
    }
}

Creating a flow

The wizard (or flow) is created and managed via a specialized collection called SidLee\FlowManager\StepCollection.

In order to create a flow, you must first populate your StepCollection with the desired steps (and names).

use SidLee\FlowManager\StepCollection;

$stepCollection = new StepCollection();
$stepCollection->add('start', new WizardStartStep());
$stepCollection->add('accountInfo', new AccountInformationStep());
$stepCollection->add('confirmAccountInfo', new AccountInformationConfirmationStep());
$stepCollection->add('welcome', new WelcomeStep());

For more complex flows, you can also nest StepCollection instances (use add() with a StepCollection instead of a StepInterface).

Using the created flow

Once the flow has been created, you must create an implementation of SidLee\FlowManager\AbstractFlowManager that will be able to manage the flow.

You must implement following functions:

• getCurrentStepName()
  This function is responsible for fetching the current step name from the underlying data source.

• setCurrentStepNameToData() This function is responsible for setting the current step name in the underlying data source.

• getNavigationHttpResponse() This function returns a Symfony\Component\HttpFoundation\Response whenever a navigation between steps is required.

Once your implementation is completed, you then have create a instance of your FlowManager by specifying a root key and the StepCollection representing your flow. You may also pass the desired EventDispatcher to be used for events.

Step Identifiers

Steps will be assigned a string identified based on the name and their nesting level in the StepCollection as well as the root key passed to the FlowManager.

Assuming that you have the following structure inside a StepCollection:

- wizard_start
- registration_subflow
    - account_information
    - credentials_information
    - captcha
- download_client
- welcome

and that your root key in the FlowManager is "firstTimeSetup". The steps will be given the following fully qualified identifiers:

- firstTimeSetup.wizard_start
- firstTimeSetup.registration_subflow.account_information
- firstTimeSetup.registration_subflow.credentials_information
- firstTimeSetup.registration_subflow.captcha
- firstTimeSetup.download_client
- firstTimeSetup.welcome

These identifiers can be used to navigate directly to a step using NavigationDirection::DIRECT().