Streamlining Student Interaction with Tutor Controller in PHP

Welcome to the next step in our journey of building a personal tutor service with DeepSeek models. In the previous lesson, we explored the TutorService class, which acts as a bridge between managing tutoring session data and generating AI responses. Now, we will focus on the TutorController, a crucial component that manages tutoring sessions and handles student queries by interacting with both the model and service layers. The controller is responsible for orchestrating the flow of data between the student interface and the backend services, ensuring that student interactions are processed efficiently and effectively.

The TutorController class is the heart of our controller layer. It is responsible for managing tutoring sessions and processing student queries. Let's begin by examining the structure of the TutorController class.

<?php

use Services\TutorService;

class TutorController {
    private array $testSession = [];
    private TutorService $tutorService;

    public function __construct() {
        $this->tutorService = new TutorService();
    }
}

In this snippet, we:

• Use the TutorService class for managing tutoring data and processing student queries.
• Initialize the TutorController with an instance of TutorService.
• Create a $testSession array to simulate session management for testing purposes.

The $testSession is a simple array used to simulate session management for testing purposes. It allows us to mimic the behavior of student sessions typically managed by a web application or browser. In a real-world scenario, student sessions help track individual students as they interact with a web application, maintaining their state and data across multiple requests. By using $testSession, we can focus on testing the core functionality of the TutorController without needing a full session management system. Once we are confident that the controller works correctly, we will later integrate a more robust session management solution when developing our RESTful API.

Before creating a tutoring session, we need to ensure that a student session exists. The ensureStudentSession method checks if a student ID is present in the $testSession. If not, it generates a new student ID.

public function ensureStudentSession(): string
{
    if (!isset($this->testSession['student_id'])) {
        $this->testSession['student_id'] = uniqid('', true);
    }
    return $this->testSession['student_id'];
}

This method ensures that a student session is available by checking the $testSession array for a student_id. If it doesn't exist, a new student ID is generated using uniqid('', true) and stored in the session. The method then returns the student ID, either the newly created one or the existing one.