README

A powerful Laravel package for workflow management with states and transitions. Litepie Flow provides a comprehensive solution for building complex business workflows with state management and event-driven transitions, seamlessly integrated with the Litepie Actions package.

Features

• 🔄 Workflow Management: Define complex workflows with states and transitions
• 📊 State Management: Track and manage entity states throughout their lifecycle
• ⚙️ State Machines: Lightweight state management for individual model attributes
• ⚡ Event System: Built-in event handling for workflow transitions
• 🎯 Action Integration: Seamless integration with the Litepie Actions package
• 📝 Database Logging: Track workflow executions and transition history
• 🚀 Laravel Integration: Seamless integration with Laravel's ecosystem
• 🔧 Extensible: Easy to extend and customize for your specific needs

Installation

Install the package via Composer:

composer require litepie/flow

Note: This will automatically install the required litepie/actions dependency.

Publish and Run Migrations

Publish and run the migrations:

php artisan vendor:publish --tag="flow-migrations"
php artisan migrate

Configuration (Optional)

Optionally, publish the configuration file:

php artisan vendor:publish --tag="flow-config"

Quick Start

Option 1: Simple State Machine (Recommended for basic state tracking)

For simple state tracking on model attributes, use state machines:

<?php

// 1. Create a State Machine
namespace App\StateMachines;

use Litepie\Flow\StateMachine\AbstractStateMachine;

class OrderStatusStateMachine extends AbstractStateMachine
{
    public function transitions(): array
    {
        return [
            'process' => ['from' => 'pending', 'to' => 'processing'],
            'ship' => ['from' => 'processing', 'to' => 'shipped'],
            'deliver' => ['from' => 'shipped', 'to' => 'delivered'],
            'cancel' => ['from' => ['pending', 'processing'], 'to' => 'cancelled'],
        ];
    }

    public function stateLabels(): array
    {
        return [
            'pending' => 'Pending Payment',
            'processing' => 'Being Processed',
            'shipped' => 'Shipped',
            'delivered' => 'Delivered',
            'cancelled' => 'Cancelled',
        ];
    }
}

// 2. Add to your Model
use Litepie\Flow\Traits\HasStateMachine;

class Order extends Model
{
    use HasStateMachine;

    protected $stateMachines = [
        'status' => OrderStatusStateMachine::class,
    ];
}

// 3. Use it
$order = Order::create(['status' => 'pending']);

// Check state
if ($order->stateMachine('status')->is('pending')) {
    // Change state
    $order->status = 'processing';
    $order->save();
}

// Get label
echo $order->stateMachine('status')->getCurrentStateLabel(); // "Being Processed"

Option 2: Complex Workflows (For business processes)

For complex business processes, use workflows:

1. Create an Action

First, create an action that will be executed during workflow transitions:

<?php

namespace App\Actions;

use Litepie\Actions\BaseAction;
use Litepie\Actions\Traits\ValidatesInput;
use Litepie\Actions\Contracts\ActionResult;

class ProcessPaymentAction extends BaseAction
{
    use ValidatesInput;

    protected string $name = 'process_payment';

    public function execute(array $context = []): ActionResult
    {
        $validated = $this->validateContext($context);
        
        // Your payment processing logic here
        $result = $this->processPayment($validated);
        
        return $result['success']
            ? $this->success($result, 'Payment processed successfully')
            : $this->failure($result['errors'], 'Payment processing failed');
    }

    protected function rules(): array
    {
        return [
            'amount' => 'required|numeric|min:0.01',
            'payment_method' => 'required|string',
            'order_id' => 'required|integer|exists:orders,id'
        ];
    }

    private function processPayment(array $data): array
    {
        // Implement your payment logic
        return ['success' => true, 'transaction_id' => '12345'];
    }
}

2. Define a Workflow

Create a workflow class that defines your business process:

<?php

namespace App\Workflows;

use Litepie\Flow\Workflows\Workflow;
use Litepie\Flow\States\State;
use Litepie\Flow\Transitions\Transition;

class OrderWorkflow
{
    public static function create(): Workflow
    {
        $workflow = new Workflow('order_processing', 'Order Processing Workflow');

        // Define states
        $pending = new State('pending', 'Pending', true);        // Initial state
        $processing = new State('processing', 'Processing');
        $shipped = new State('shipped', 'Shipped');
        $delivered = new State('delivered', 'Delivered', false, true); // Final state

        // Add states to workflow
        $workflow->addState($pending)
                 ->addState($processing)
                 ->addState($shipped)
                 ->addState($delivered);

        // Define transitions with actions
        $processTransition = new Transition('pending', 'processing', 'process');
        $processTransition->addAction(new \App\Actions\ProcessPaymentAction());

        $shipTransition = new Transition('processing', 'shipped', 'ship');
        $deliverTransition = new Transition('shipped', 'delivered', 'deliver');

        // Add transitions to workflow
        $workflow->addTransition($processTransition)
                 ->addTransition($shipTransition)
                 ->addTransition($deliverTransition);

        return $workflow;
    }
}

3. Make Your Model Workflowable

Implement the workflow interface in your Eloquent model:

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Litepie\Flow\Traits\HasWorkflow;
use Litepie\Flow\Contracts\Workflowable;

class Order extends Model implements Workflowable
{
    use HasWorkflow;

    protected $fillable = ['customer_id', 'total', 'state'];

    public function getWorkflowName(): string
    {
        return 'order_processing';
    }

    protected function getWorkflowStateColumn(): string
    {
        return 'state';
    }
}

4. Register Your Workflow

Register the workflow in a service provider:

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Litepie\Flow\Facades\Flow;
use App\Workflows\OrderWorkflow;

class WorkflowServiceProvider extends ServiceProvider
{
    public function boot(): void
    {
        Flow::register('order_processing', OrderWorkflow::create());
    }
}

Don't forget to register your service provider in config/app.php:

'providers' => [
    // Other providers...
    App\Providers\WorkflowServiceProvider::class,
],

Usage Examples

Basic Workflow Operations

// Create a new order
$order = Order::create([
    'customer_id' => 1,
    'total' => 99.99,
    'state' => 'pending'
]);

// Check available transitions
$transitions = $order->getAvailableTransitions();

// Check if a specific transition is possible
if ($order->canTransitionTo('processing')) {
    // Transition to the next state with context data
    $order->transitionTo('processing', [
        'amount' => $order->total,
        'payment_method' => 'credit_card',
        'order_id' => $order->id
    ]);
}

// Get current state
$currentState = $order->getCurrentState();
echo $currentState->getLabel(); // "Processing"

// Get workflow history
$history = $order->getWorkflowHistory();

Advanced Usage

// Listen to workflow events
Event::listen('workflow.order_processing.transition.process', function ($event) {
    Log::info('Order transitioned to processing', [
        'order_id' => $event->getSubject()->id,
        'from' => $event->getFromState(),
        'to' => $event->getToState()
    ]);
});

// Conditional transitions
if ($order->getCurrentState()->getName() === 'pending' && $order->total > 100) {
    $order->transitionTo('processing', ['expedite' => true]);
}

// Bulk state updates
Order::whereIn('id', [1, 2, 3])
     ->each(function ($order) {
         if ($order->canTransitionTo('shipped')) {
             $order->transitionTo('shipped');
         }
     });

Configuration

After publishing the config file, you can customize various aspects of the workflow system:

return [
    // Database table names
    'tables' => [
        'workflows' => 'workflows',
        'workflow_states' => 'workflow_states',
        'workflow_transitions' => 'workflow_transitions',
        'workflow_logs' => 'workflow_logs',
    ],

    // Event handling
    'events' => [
        'enabled' => true,
        'prefix' => 'workflow',
    ],

    // Logging configuration
    'logging' => [
        'enabled' => true,
        'channel' => env('WORKFLOW_LOG_CHANNEL', 'default'),
    ],

    // Action configuration
    'actions' => [
        'namespace' => 'App\\Actions',
        'timeout' => 300, // seconds
    ],
];

Architecture

Core Components

1. Workflows: Define complex business processes with multiple participants
2. State Machines: Handle simple state transitions for individual model attributes
3. States: Represent different stages in workflows and state machines
4. Transitions: Define how to move between states
5. Actions: Execute business logic during transitions
6. Events: Handle workflow and state machine lifecycle events

When to Use What

Use Workflows for:

• Complex business processes (order approval, document review)
• Multi-step workflows with multiple participants
• Advanced transition logic with guards and actions
• Process orchestration

Use State Machines for:

• Simple state tracking (order status, payment status)
• Individual attribute state management
• Multiple independent states on the same model
• Lightweight state transitions

State Management

States can be:

• Initial: Starting point of the workflow
• Final: End point of the workflow
• Intermediate: States between initial and final

Action Integration

Actions are powered by the Litepie Actions package and provide:

• Input validation
• Result handling
• Error management
• Retry mechanisms

Events

The package dispatches several events during workflow execution:

• workflow.{name}.guard.{transition} - Before transition validation
• workflow.{name}.leave.{state} - When leaving a state
• workflow.{name}.transition.{transition} - During transition
• workflow.{name}.enter.{state} - When entering a state
• workflow.{name}.entered.{state} - After entering a state

Event Listeners

// In EventServiceProvider
protected $listen = [
    'workflow.order_processing.enter.processing' => [
        NotifyCustomerListener::class,
    ],
    'workflow.order_processing.transition.ship' => [
        GenerateTrackingNumberListener::class,
    ],
];

Testing

Run the tests with:

composer test

Dependencies

This package depends on:

• litepie/actions - For action pattern implementation
• Laravel 8.x|9.x|10.x|11.x
• PHP 8.0+

Documentation

For more detailed documentation, please refer to:

• 📊 State Machines - Simple state management for model attributes
• 🔄 Workflows - Complex workflow management guide
• 🔄 States & Transitions - State and transition documentation
• ⚡ Actions - Action development guide
• 📡 Events - Event system documentation
• 🔧 Integration - Integration patterns and examples

Contributing

Please see CONTRIBUTING.md for details on how to contribute to this project.

Development Setup

1. Clone the repository
2. Install dependencies: composer install
3. Run tests: composer test
4. Check code style: composer cs-check
5. Fix code style: composer cs-fix

Security

If you discover any security-related issues, please email the maintainers instead of using the issue tracker.

Changelog

Please see CHANGELOG.md for more information about what has changed recently.

License

The MIT License (MIT). Please see LICENSE.md for more information.

Credits

• Lavalite Team
• All Contributors

Support

If you find this package useful, please consider:

• ⭐ Starring the repository
• 🐛 Reporting bugs
• 💡 Suggesting new features
• 🔄 Contributing code improvements

🏢 About

This package is part of the Litepie ecosystem, developed by Renfos Technologies.

Organization Structure

• Vendor: Litepie
• Framework: Lavalite
• Company: Renfos Technologies

Links & Resources

• 🌐 Website: https://lavalite.org
• 📚 Documentation: https://docs.lavalite.org
• 💼 Company: https://renfos.com
• 📧 Support: support@lavalite.org

Built with ❤️ by Renfos Technologies

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