🐦 be0 Backend

🚀 A robust Go-based backend service with advanced authentication and permission systems.

✨ Features

🔐 Authentication System

• 🎯 JWT-based authentication with refresh tokens
• 👥 Role-based access control (RBAC)
• 🔑 Password reset functionality with time-limited codes
• 👑 Super admin creation on first run

🛡️ Permission System

• 📊 Granular resource-based permissions
• 🏗️ Module-based organization
• 👤 Role-based default permissions
• 🌟 Support for wildcard permissions (e.g., "teams:*")

🎯 Supported Modules

1. 🏢 Team Management

• 🌐 Multi-team support
• ✉️ Team invitations
• ⚙️ Team settings

2. 👤 User Management

• 👑 User roles (Super Admin, Admin, Member)
• 🔑 Permission management
• 👤 Profile management

🚌 Event Bus System

• 🎯 Decoupled service communication
• ⚡ Asynchronous event handling
• 🔌 Service hooks integration
• 🛡️ Panic recovery in event handlers

Event Flow Architecture

sequenceDiagram
    participant M as Models
    participant E as Event Bus
    participant S as Services
    participant H as Hooks
    
    M->>E: Emit Event
    activate E
    E->>S: Notify Service
    E->>H: Trigger Hooks
    S-->>E: Process Event
    H-->>E: Execute Hook
    deactivate E

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Available Events

Event Name	Description	Payload
user.registered	Triggered on new registration	UserData
team.created	Triggered when a new team is created	TeamData

Example Usage

// Register event handler
events.On("user.created", func(data interface{}) {
    // Handle email sent event
})

// Emit event
events.Emit("user.created", emailData)

🚀 Getting Started

📋 Prerequisites

• 🔧 Go 1.21 or higher
• 🗄️ PostgreSQL 17 or higher
• ⚡ Redis (for rate limiting and caching)

🔧 Environment Variables

# 🖥️ Server Configuration
SERVER_HOST=localhost
SERVER_PORT=8080

# 🗄️ Database Configuration
POSTGRES_HOST=localhost
POSTGRES_PORT=5432
POSTGRES_USER=kori_user
POSTGRES_PASSWORD=kori_password
POSTGRES_DB=kori
POSTGRES_SSLMODE=disable

# 🔒 JWT Configuration
JWT_SECRET=your_secure_jwt_secret

# 📁 Storage Configuration
STORAGE_PROVIDER=local
STORAGE_BASE_PATH=./storage

# ⚙️ Worker Configuration
WORKER_CONCURRENCY=5
WORKER_QUEUE_SIZE=100

# 🔄 Redis Configuration
REDIS_HOST=localhost
REDIS_PORT=6379
REDIS_PASSWORD=kori_password
REDIS_DB=0

# 👑 Super Admin Configuration (First Run)
SUPERADMIN_EMAIL=[email protected]
SUPERADMIN_PASSWORD=secure_password
SUPERADMIN_NAME=Admin

📥 Installation

1. Clone the repository:

git clone https://github.com/theboringhumane/be0.go.git
cd be0.go

2. Install dependencies:

go mod download

3. Set up the environment:

cp .env.example .env
# Edit .env with your configuration

4. Run migrations:

go run cmd/migrate/main.go

5. Start the server:

go run cmd/server/main.go

📚 API Documentation

The API is documented using Swagger/OpenAPI. Access the documentation at:

http://localhost:8080/swagger/index.html

🔐 Authentication

📝 Registration

POST /api/v1/auth/register
{
    "email": "[email protected]",
    "password": "secure_password",
    "first_name": "John",
    "last_name": "Doe"
}

🔑 Login

POST /api/v1/auth/login
{
    "email": "[email protected]",
    "password": "secure_password"
}

🔄 Password Reset

POST /api/v1/auth/password-reset
{
    "email": "[email protected]"
}

🔒 Authentication System Architecture

The authentication system supports both traditional email/password authentication and Google OAuth, integrated with JWT-based session management.

graph TD
    subgraph "Traditional Email/Password Authentication"
        A[User Registration/Login] -->|Email & Password| B{Exists?}
        B -->|No - Register| C[Create Team & User]
        C --> D[Assign Default Permissions]
        B -->|Yes - Login| E[Validate Password]
        D --> F[Generate Tokens]
        E -->|Valid| F
        E -->|Invalid| G[Return Error]
        F --> H[Create Auth Transaction]
        H --> I[Return JWT & Refresh Token]
    end

    subgraph "Google OAuth Authentication"
        J[Google Sign-In] -->|ID Token| K[Verify with Firebase]
        K -->|Valid| L{User Exists?}
        L -->|No| M[Create Team & User]
        M --> N[Assign Default Permissions]
        L -->|Yes| O[Update Provider Data]
        N --> P[Generate Tokens]
        O --> P
        P --> Q[Create Auth Transaction]
        Q --> R[Return JWT & Refresh Token]
    end

    subgraph "JWT Token Flow"
        S[Protected API Request] -->|JWT Token| T[Auth Middleware]
        T -->|Validate| U{Token Valid?}
        U -->|Yes| V[Extract Claims]
        V --> W[Set Context]
        W --> X[Continue to Handler]
        U -->|No| Y[Return 401]
    end

    subgraph "Token Refresh Flow"
        Z[Refresh Token Request] -->|Refresh Token| AA{Valid?}
        AA -->|Yes| AB[Get User]
        AB --> AC[Generate New Access Token]
        AC --> AD[Update Auth Transaction]
        AD --> AE[Return New Access Token]
        AA -->|No| AF[Return 401]
    end

    subgraph "Password Reset Flow"
        AG[Reset Request] -->|Email| AH[Generate Reset Code]
        AH --> AI[Store Reset Code]
        AI --> AJ[Send Reset Email]
        AK[Reset Verification] -->|Code & New Password| AL{Valid Code?}
        AL -->|Yes| AM[Update Password]
        AM --> AN[Mark Code Used]
        AL -->|No| AO[Return Error]
    end

    subgraph "Team Invite Flow"
        AP[Team Invite] -->|Email & Role| AQ[Generate Invite Code]
        AQ --> AR[Store Invite]
        AR --> AS[Send Invite Email]
        AT[Accept Invite] -->|Code & Password| AU{Valid Invite?}
        AU -->|Yes| AV[Create User]
        AV --> AW[Assign Team & Role]
        AU -->|No| AX[Return Error]
    end

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Key Components:

1. 🔐 Authentication Methods

   • 📧 Traditional Email/Password
   • 🔑 Google OAuth via Firebase
   • 📨 Team Invitations

2. 🎟️ Token Management

   • 🔒 JWT Access Tokens (24h validity)
   • 🔄 Refresh Tokens (7 days validity)
   • 📝 Auth Transaction Tracking

3. 👥 User Management

   • 🏢 Automatic Team Creation
   • 👑 Role Assignment
   • 🔑 Permission Management

4. 🔒 Security Features

   • 🔐 Bcrypt Password Hashing
   • ⏰ Time-Limited Reset Codes
   • 🔍 Firebase Token Verification
   • 📊 Transaction-based Operations

5. 🤝 Integration Points

   • 🔌 Firebase Authentication
   • 📨 Email Service for Notifications
   • 📝 Event System for Tracking

Authentication Endpoints:

# Traditional Authentication
POST /api/v1/auth/register     # User Registration
POST /api/v1/auth/login        # User Login
POST /api/v1/auth/refresh      # Token Refresh

# Google OAuth
POST /api/v1/auth/google       # Google Sign-In

# Password Management
POST /api/v1/auth/password-reset         # Request Reset
POST /api/v1/auth/password-reset/verify  # Verify Reset

# Team Management
POST /api/v1/auth/invite       # Send Team Invite
POST /api/v1/auth/accept/:code # Accept Invite

🛡️ Security Features

1. ⚡ Rate Limiting

   • 🔒 Request rate limiting per IP
   • 🔑 API key rate limiting
   • ⚙️ Configurable limits

2. 🔒 JWT Security

   • ⏱️ Short-lived access tokens (24 hours)
   • 🔄 Refresh token support (7 days)
   • 🎯 Permission claims in tokens

3. 🔐 Password Security

   • 🔒 Bcrypt password hashing
   • ✅ Minimum password requirements
   • 🛡️ Secure password reset flow

4. 🔒 API Security

   • 🌐 CORS protection
   • 📦 Request size limiting
   • 🛡️ Secure headers
   • 🗜️ GZIP compression

👨‍💻 Development

📁 Project Structure

📦 be0.go
 ┣ 📂 cmd                     # Application entry points
 ┣ 📂 internal               
 ┃ ┣ 📂 api                  # API layer
 ┃ ┃ ┣ 📂 middleware         # Custom middlewares
 ┃ ┃ ┣ 📂 validator          # Request validators
 ┃ ┃ ┗ 📜 server.go          # Server setup
 ┃ ┣ 📂 config               # Configuration
 ┃ ┣ 📂 events               # Event bus system
 ┃ ┣ 📂 handlers             # Request handlers
 ┃ ┣ 📂 models               # Database models
 ┃ ┣ 📂 routes               # Route definitions
 ┃ ┣ 📂 services             # Business logic
 ┃ ┗ 📂 utils                # Utility functions
 ┣ 📂 migrations             # Database migrations
 ┗ 📂 storage                # Local storage

✨ Adding New Features

1. 📦 New Resource

   • 📝 Add model in internal/models/
   • 🔑 Add permissions in internal/models/seed.go
   • 🎯 Create handler in internal/handlers/
   • 🔌 Add routes in internal/routes/

2. 🔑 New Permission

   • 📝 Add resource in defaultResources
   • 👥 Add permissions in rolePermissions
   • 🔄 Run server to auto-seed

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.