Repo.ProductController.php

<?php namespace App\Http\Controllers;

use App\Repos\ProductRepository;

class ProductController extends Controller
{
    /**
     * An instance of the Product Repository
     * @var \App\Repos\ProductRepository
     */
    protected $repo;
    
    /**
     * Injects the dependency
     * @param \App\Repos\ProductRepository $repo
     */
    public function __construct(ProductRepository $repo)
    {
        $this->repo = $repo;
    }
    
    /**
     * Gets a product by the ID
     * @param int $id
     * @return \Illuminate\View\View
     */
    public function show($id)
    {
        $product = $this->repo->findById($id);
        return view('product', $product);
    }
}