kata-users-ts

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Project to apply Clean Architecture and DDD concepts

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# Clean Architecture - "Users" Kata

## General Description

### Functional Requirements

- Display list of users.
- Add a new user.
- A user must contain name, email, and password as required fields.
- Email must be a valid email.
- Password must be at least 8 characters, with at least one letter and one number.
- The app should show an error if trying to add two users with the same email.
- **Extra Challenge**:
  - Add address as part of the required information for the user (address, zip code, city).
  - Only one user per domain can exist (1 user with gmail, etc...).

### Development Platform

- The UI will be a command line or terminal app.
- All data in memory, no persistence between executions.
- The data source could be an API or Database in the future.
- The UI could change in the future to a web app, mobile app, or desktop app.
- Business rules must be validated through unit tests.
- In tests, dependencies will be replaced by manual fake dependencies.
- Equality tests must also be created for value objects and entities.
- Use MVP for the presentation layer.

## Part 1 - Entities

- Define entities and value objects.
- Business rules must be tested by creating unit tests.
- Rules:

- The user must have name, email, and password as required fields.
  - Email must be a valid email.
  - Password must have a minimum length of 8 characters, have at least one letter and one number.
  - Two instances of the same email must be equal.
  - Two instances of the same password must be equal in a comparison.
  - Two instances of user, with the same id, must be equal in a comparison.

- **Extra Challenge**:
  - Add address as part of the required information for the user (address, zip code, city).

## Part 2 - Use Cases

- Define the use cases, repositories for:
  - Displaying list of users.
  - Adding a new user.
- Application rules must be tested by creating unit tests.
- In unit tests, you can use manual fake objects.
- Rules:
  - The application must not allow adding two users with the same email.
- **Extra Challenge**:
  - Only one user per domain can exist (1 user with gmail, etc...).

## Part 3 - UI
- Create a console application that invokes the use cases.
- Use MVP
- Define the presenter and the UI
- The presenter must be conditioned by the UI it adapts

## Part 4
- Modify the app to have persistence between executions using a database, locally stored file, or another solution. Maintain the domain and presentation layers without modifications.
- Replace the console or terminal UI with a technology of your preference, keeping the domain and data layers unmodified.
- Only the corresponding adapters should change and the composition root if necessary.
- Add address as part of the necessary information for the user (address, zip code, city) and create the necessary tests.
- Only one user per domain can exist (1 user with gmail.com, 1 user with outlook.com, etc.) and create the necessary tests.

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