Repository in Laravel

Create a Laravel project.

php artisan make:model Event --mcr

Create a folder named as Interfaces under app.
Create EventRepositoryInterface.php inside the folder

EventRepositoryInterface.php:

<?php

namespace App\Interfaces;

interface EventRepositoryInterface 
{
    public function getAllEvents();
    public function getEventById($eventId);
    public function deleteEvent($eventId);
    public function createEvent(array $eventDetails);
    public function updateEvent($eventId, array $newDetails);
}

As it's an Interface it only supports public methods, create required methods.

Create a folder named as Repositories under app.
Create EventRepository.php inside the folder

EventRepository.php:

<?php

namespace App\Repositories;

use App\Interfaces\EventRepositoryInterface;
use App\Models\Event;

class EventRepository implements EventRepositoryInterface 
{
    public function getAllEvents() 
    {
        return Event::all();
    }

    public function getEventById($eventId) 
    {
        return Event::findOrFail($eventId);
    }

    public function deleteEvent($eventId) 
    {
        Event::destroy($eventId);
    }

    public function createEvent(array $eventDetails) 
    {
        return Event::create($eventDetails);
    }

    public function updateEvent($eventId, array $newDetails) 
    {
        return Event::whereId($eventId)->update($newDetails);
    }
}

Using the Repository in the controller

<?php

namespace App\Http\Controllers;

use App\Interfaces\EventRepositoryInterface;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response;

class EventController extends Controller 
{
    private EventRepositoryInterface $eventRepository;

    public function __construct(EventRepositoryInterface $eventRepository) 
    {
        $this->eventRepository = $eventRepository;
    }

    public function index(): JsonResponse 
    {
        return response()->json([
            'data' => $this->eventRepository->getAllEvents()
        ]);
    }
    public function store(Request $request): JsonResponse 
    {
        $res = $this->eventRepository->createEvent($eventDetails);
        return response()->json([
            'data' => $res
        ]);
    }

}

Lastly the Repository service provider needs to be created, booted and the repository file needs to be mapped for that

php artisan make:provider RepositoryServiceProvider

Inside the RepositoryServiceProvider's boot function mapp the interface with the repo:

$this->app->bind(EventRepositoryInterface::class,EventRepository::class);

Also add the the new Service Provider to the providers array in config/app.php so that Laravel boots it when the app boots

'providers' => [
    // ...other declared providers
    App\Providers\RepositoryServiceProvider::class,
];