Forem: Ahmed sliman

Laravel Events 101

Ahmed sliman — Tue, 19 Dec 2023 09:08:04 +0000

What is Event-Driven Programming?

Simply put, events are actions that occur within an application. Coming from the world of JavaScript, you probably understand events as user actions such as mouse click, mouseover, key press, etc. In Laravel, events can be various actions that occur within an application such as email notifications, logging, user sign-up, CRUD operations, etc. Laravel events provide a simple observer implementation, allowing you to subscribe and listen for various events that occur in your application.

Why should we use Events?!

Easier to maintain (SOLID).
Less risk of regression,
Make classes responsible for only one thing,
Make team’s work easier,
Expect the unexpected, If you ever need to add new functionality, all you need to do is create a new listener and register it with the event. Job is done!
Your logic is separated and now the Controller has much-reduced responsibility
Allow asynchronous tasks easily (queues in Laravel).
Be ready for broadcasting

Let's compare two pieces of code with/without events

With

Without

How do we create Events?

Defining Our Events

php artisan make:event UserRegistered

The event has been created successfully

php artisan make:listener SendWelcomeMail --event=UserRegistered

The listener has been created successfully

php artisan make:listener SignupForWeeklyNewsletter --event=UserRegistered

The listener has been created successfully

php artisan make:listener SendSMS --event=UserRegistered

The listener has been created successfully

ESP - EventServiceProvider

php artisan event:generate

Events and Listeners generated successfully

Stopping The Propagation Of An Event

Eloquent Native Events

With his Eloquent model, Laravel will automatically fire created, saved, updated and deleted events respectively.

To start listening to model events, define a $dispatchesEvents property on your Eloquent model. This property maps various points of the Eloquent model's lifecycle to your event classes. Each model event class should expect to receive an instance of the affected model via its constructor.

Eloquent Native Events

Why MobX?

Ahmed sliman — Wed, 07 Sep 2022 09:27:34 +0000

MobX?
It's an open source state management tool. When creating a web application, developers often seek an effective way of managing state within their applications.

Why MobX?

MobX get you an ability to handle multiple data-structures of states
Sync render by tracking observable pieces of state
Help on scalable applications with manage state easily

What is State?

Application state refers to the entire model of an application and can contain different data types including arrays, numbers, and objects. In MobX, actions are methods that manipulate and update the state. These methods can be bound to a JavaScript event handler to ensure a UI event triggers them.

MobX concepts

MobX has four principle concepts that we should learn, to understand how it works: observables, computed values, reactions and actions.
MobX also introduces a few concepts: state, actions, and derivations (including reactions and computed values).
By wrapping the component with an observer, it will now automatically become aware of changes in the store

The Clean Architecture In PHP

Ahmed sliman — Tue, 15 Mar 2022 16:57:31 +0000

This book is amazing in explaining and applying SOLID principles and many common design patterns.
The main benefit of the book is it give a quick theoretical introduction then start applying in a really advanced way the clean (onion) architecture.
Some parts was very brief, So I got help from other resources.
Other benefit of the book is applying the principles in a small project that getting bigger throughout the book, and it also apply how to trasfer the project from a framework to another to expose the concepts of decoupling. So, you will find it go from Zend, Laravel to Symfony.
It's a short review as it's more like my impression for a good journey :)