Product Fetcher Module

Overview

This module is designed to fetch product data from multiple sources, including a database (simulated via a CSV file) and an XML file. The data is then normalized into a standardized format and displayed as a unified result. The module follows an object-oriented approach using the Service Pattern, ensuring flexibility and easy extensibility for future sources.

Features

• Fetches product data from multiple sources (CSV, XML).
• Normalizes data to a standard structure (Title, Description, Image Link, Price).
• Easily extensible to support additional data sources in the future.
• Implements a ProductSourceInterface to ensure consistency across different sources.

Installation

1. Clone or download this repository.
2. Run composer install to install dependencies.
3. Pending (CSV and DB reader for now)

Directory Structure

Class Diagram

Class Diagram illustrates the relationships between the classes used in this module. The diagram includes:

• ProductService: Manages the product fetching and normalization process.
• ProductSourceInterface: Defines the common contract for all product sources.
• DatabaseProductSource: Fetches products from a database (CSV file).
• XMLProductSource: Fetches products from an XML file.

(Include a link or attach the actual diagram file in your ZIP submission.)

Usage

In the index.php file, we create instances of DatabaseProductSource and XMLProductSource, add them to the ProductService, and then fetch and display the products.

Example:

// Include the Composer autoloader
require_once __DIR__ . '/vendor/autoload.php';

// Set up namespaces
use App\Sources\Database\DatabaseProductSource;
use App\Sources\XML\XMLProductSource;
use App\Services\ProductService;

// Create instances of your fetchers
$databaseFetcher = new DatabaseProductSource();
$xmlFetcher      = new XMLProductSource();

// Instantiate the ProductService and add sources
$productService = new ProductService();
$productService->addSource($databaseFetcher);
$productService->addSource($xmlFetcher);

// Fetch and display products
$products = $productService->getProducts();

// Output products in JSON format
header('Content-Type: application/json');
echo json_encode($products);

Product Structure

The product data from each source is normalized into the following structure:

title: Product name.

description: Product description.

image_link: URL to the product image.

price: Price of the product.