[FEAT]: Retrieve Product Details By Id

[CallmeInnocent]

Description:

Develop a backend API endpoint to allow logged-in users to retrieve the details of a specific product. This functionality is part of the product management system and requires user authentication.

Acceptance Criteria:

Endpoint security:
Only authenticated users can have access to the endpoint
A user must have the appropriate permissions to access the endpoint
Each request to the endpoint must include a valid authentication token in the

1. Retrieve Product Details:
   • Method: GET
   • URL: /api/v1/products/:id
   • Request:
   o Headers:
    Authorization: Bearer <JWT_token>
   • Response:
   On successful retrieval:

    {
	  "status": "success",
	  "message": "Product details retrieved successfully",
	  "status_code": 200,
	  "data": {
	    "id": 1,
	    "name": "string",
	    "description": "string",
            "category": null,
            "price": 50.0,
            "imageUrl": null,
            "status": true,
            "current_stock": 789
    }

On error (e.g., product not found):
{
  "status": "error",
  "message": "Product not found",
  "status_code": 404
}

On error (e.g., unauthorized access):
{
  "status": "error",
  "message": "Unauthorized access",
  "status_code": 401
}

Validation:

• Validate the JWT auth token.
• Validate that the id exists and the user is authorized to view the product.

Purpose:

To provide a secure and authenticated endpoint for retrieving details of a specific product, ensuring only authorized users can access this information.

Expected Outcome:

A fully functional backend API endpoint that allows logged-in users to retrieve product details, with proper validation and error handling.

Tasks:

• Implement the GET endpoint to retrieve product details.
• Validate inputs and handle errors appropriately.
• Write unit tests for the endpoint to ensure it handles valid and invalid inputs correctly.

Test Scenarios:

1. Successful product retrieval: Verify that a logged-in user can retrieve product details with a valid product ID.
2. Product not found: Verify that the endpoint returns a 404 status code when the product does not exist.
3. Unauthorized access: Verify that the endpoint returns a 401 status code when the user is not authorized to view the product.
4. Validation error: Verify that the endpoint returns a 400 status code when required parameters are missing or incorrectly formatted.