SOLID Principles in Laravel: A Cyberpunk AI Guide, Part 2

Part 2: The Open-Closed Principle

The open-closed principle (OCP) states that software entities (classes, modules, functions, etc.) should be open for extension, but closed for modification.

We are going to develop a new AI system called “NeuroNet,” which is designed to be used in a variety of environments such as virtual reality simulations, augmented reality, etc. The AI system will be developed so that is designed to learn and adapt to these situations and environments, but is protected against modification by external parties.

This allows NeuroNet to be used in a wide variety of contexts and environments, while also ensuring that its core functionality remains unchanged and stable – keeping it OCP.

Implementation:

We’ll start with an AISystem interface that specifies the core functionality that all AI systems must implement:

interface AISystem
{
    public function processInput($input);
    public function generateOutput();
}

Next, we’ll create a NeuroNet class that implements the AISystem interface and provides the implementation for the required methods:

class NeuroNet implements AISystem
{
    protected $learningModel;

    public function __construct()
    {
        // Initialize the NeuroNet learning model using machine learning algorithms
        $this->learningModel = new NeuralNetwork();
    }

    public function processInput($input)
    {
        // Process input using the NeuroNet learning model
        $this->learningModel->process($input);
    }

    public function generateOutput()
    {
        // Generate output using the NeuroNet learning model
        return $this->learningModel->generateOutput();
    }
}

Now, we use dependency injection to inject the NeuroNet class into any part of our application that needs to use an AI system:

class SomeController extends Controller
{
    protected $aiSystem;

    public function __construct(AISystem $aiSystem)
    {
        $this->aiSystem = $aiSystem;
    }

    public function processInput(Request $request)
    {
        $input = $request->input('data');
        $this->aiSystem->processInput($input);
    }

    public function generateOutput(Request $request)
    {
        return $this->aiSystem->generateOutput();
    }
}

Usage

$controller = new SomeController();
$controller->processInput($someInputData);
$output = $controller->generateOutput();

At this point, we can extend the NeuroNet AI system by implementing the AISystem interface and injecting the new AI system into our application, without having to modify any existing code.

Let’s say, for example, we want to create a new AI system called “NeuroGen” that is based on the NeuroNet AI system, but uses a different machine learning algorithm.

To do this, we’ll create a NeuroGen class that implements the AISystem interface and provides its own implementation for the processInput and generateOutput methods:

class NeuroGen implements AISystem
{
    protected $learningModel;

    public function __construct()
    {
        // Initialize the NeuroGen learning model using a different machine learning algorithm
        $this->learningModel = new GeneticAlgorithm();
    }

    public function processInput($input)
    {
        // Process input using the NeuroGen learning model
        $this->learningModel->process($input);
    }

    public function generateOutput()
    {
        // Generate output using the NeuroGen learning model
        return $this->learningModel->generateOutput();
    }
}

In keeping with OCP, you can see that we’ve extended the AI System without modifying the core functionality.