RepositoriesServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;

class RepositoriesServiceProvider extends ServiceProvider
{
    /**
     * Repositories Name Space
     */
    const REPOSITORIES_NAME_SPACE = "App\\Repository";
  
    /**
     * Repositories Name
     *
     * @var array
     */
    protected $repositories = [
        'Book',
        'Chart',
        'Expense',
        'Notification',
    ];

    /**
     * Register services.
     *
     * @return void
     */
    public function register()
    {
        foreach ($this->repositories as $repo) {
            $this->app->bind(
                self::REPOSITORIES_NAME_SPACE . "\\" . ($repo . "Contract"),
                self::REPOSITORIES_NAME_SPACE . "\\" . ($repo . "Entity")
            );
        }
    }
}