👥 User Service

Github: github.com/le-minh-duc-dev/chat-system-user-service.git

The User Service manages user profile data within the Chat System.
It provides APIs to create, fetch, update, and list user profiles securely and efficiently.

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📜 Features

• User Creation
  Create a new user profile upon successful registration at the Auth Service.

• Email Existence Checking
  Allow verification if an email address is already registered (for frontend validations).

• User Profile Retrieval
  Fetch complete user information by their Auth ID.

• User Profile Update
  Support partial updates to a user's public profile .

• Paginated User Listing
  Provide paginated and sorted listing of all user profiles for admin or system needs.

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🧰 Technology Stack

• Spring Boot
• Spring Data JPA
• Spring Data Redis
• Spring Cloud Netflix Eureka
• Spring Cloud Config
• Hibernate Validator
• Redis
• PostgreSQL

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📂 Endpoints Overview

Method	Endpoint	Description
POST	/api/v1/users/email_exists	Check if an email address already exists
POST	/api/v1/users	Create a new user profile
GET	/api/v1/users/{authId}	Get user profile information by authentication ID
PATCH	/api/v1/users/{authId}	Partially update a user profile
GET	/api/v1/users	Get a paginated and sorted list of all users

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🔒 Security Details

• Authentication Required:
  Accessing user information generally requires a valid JWT token via API Gateway.

• Input Validation:
  All incoming requests are validated using Hibernate Validator annotations (e.g., @Valid, @Min(1)).

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⚙️ How the User Profile Creation Flow Works

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📁 Data Contracts

Create User Profile Request (UserDTO)

{
  "authId": 123,
  "email": "user@example.com"
}

Check Email Existence Request (EmailCheckingRequest)

{
  "email": "user@example.com"
}

Update User Profile Request (ClientUserDTO)

{
  "email": "updated@example.com"
}