Design Patterns:

1. Adapter:

Adapter are used to make invertion dependency at an internal layer to an external layer. ExpressAdpaterRouter for example adapts Controllers layer (internal) to point to Express framework (external).

https://refactoring.guru/design-patterns/adapter

2. Composite:

Main layer is going to couple all the layers of the project. In Presentation layer at validation, ValidationComposite class composes the validations of controllers: EmailValidation and RequiredFieldsValidation

https://refactoring.guru/design-patterns/composite

3. Factory:

Creational Design Pattern that provides an interface for creating objects in a superclass. https://refactoring.guru/design-patterns/factory-method

4. Decorator:

Attach new behaviours to objects by placing these objects inside special wrapper objects that contains behaviors. https://refactoring.guru/design-patterns/decorator

Clean Code

Dependency Injection

Dependency Injection is technic that makes a class independent of its dependencies. It happens by decoupling the usage of an object from its creation. And helps to achieve SOLID principles of Dependency Inversion and Single Responsability.

https://stackify.com/dependency-injection/

Dependency Inversion

High level modules should not depend on low level modules. Both should depend on abstractions. Abstractions should not depend on details. Details should be determined by Abstractions.

https://deviq.com/principles/dependency-inversion-principle

Notes:

SUT - System Under Test STUB - System Test Double

The main layer is the most coupled layer of the repository, it sees all others layers.

Safety:

Differences between Encryption and Hashing: https://www.geeksforgeeks.org/difference-between-hashing-and-encryption/ https://itnext.io/password-encryption-hashing-in-node-application-311a6f61cd65

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