AlphaZee Client Platform - Backend Implementation

Overview

This is a complete backend implementation for the AlphaZee Client Platform, built with Flask and PostgreSQL. The backend provides a comprehensive API for managing clients, projects, contracts, payments, and communication.

Features Implemented

🔐 Authentication & User Management

• User registration and login with JWT tokens
• Password reset functionality
• Identity verification with ID card and signature uploads
• Role-based access control (Admin/Client)
• Session management

📋 Project Management

• Project submission with automatic account creation
• Project status tracking and milestone management
• File uploads and project documentation
• Project type categorization
• Progress tracking and reporting

📄 Contract Management

• Contract creation and digital signing
• Contract lifecycle management (draft → sent → signed → active → completed)
• Digital signature verification
• Contract expiration handling
• PDF generation support

💳 Payment Processing

• Stripe payment integration
• Invoice generation and management
• Payment tracking and history
• Milestone-based payments
• Tax calculation

💬 Communication System

• Messaging between clients and admin
• Real-time notifications
• Message threading and replies
• File attachments support

👨‍💼 Admin Panel

• User management and verification
• Project oversight and status updates
• Contract and payment management
• System analytics and reporting
• Activity logging

Technology Stack

• Framework: Flask 3.1.1
• Database: PostgreSQL with SQLAlchemy ORM
• Authentication: Flask-JWT-Extended
• Migrations: Flask-Migrate
• Email: Flask-Mail
• File Storage: Local storage with AWS S3 support
• Payments: Stripe integration
• CORS: Flask-CORS

Database Schema

The database includes the following main tables:

• users - User accounts and profiles
• identity_verifications - Identity verification data
• projects - Project information and status
• project_types - Project categorization
• project_milestones - Project milestone tracking
• project_files - File attachments
• contracts - Contract management
• contract_signatures - Digital signatures
• payments - Payment transactions
• invoices - Invoice management
• messages - Communication system
• notifications - User notifications
• activity_logs - System activity tracking

API Endpoints

Authentication (/api/auth)

• POST /register - User registration
• POST /login - User login
• POST /logout - User logout
• POST /refresh - Refresh JWT token
• POST /forgot-password - Request password reset
• POST /reset-password - Reset password

Users (/api/users)

• GET /profile - Get user profile
• PUT /profile - Update user profile
• POST /upload-avatar - Upload profile picture
• POST /verify-identity - Submit identity verification
• GET /verification-status - Check verification status

Projects (/api/projects)

• GET /types - Get project types
• POST /submit - Submit new project (public endpoint)
• GET / - Get user projects
• GET /{id} - Get project details
• PUT /{id}/status - Update project status (admin)
• GET /{id}/milestones - Get project milestones
• POST /{id}/milestones - Create milestone (admin)
• PUT /{id}/milestones/{milestone_id}/complete - Complete milestone (admin)
• GET /{id}/files - Get project files
• POST /{id}/files - Upload project file

Contracts (/api/contracts)

• GET / - Get contracts
• GET /{id} - Get contract details
• POST / - Create contract (admin)
• PUT /{id}/send - Send contract to client (admin)
• POST /{id}/sign - Sign contract
• PUT /{id}/activate - Activate contract (admin)
• PUT /{id}/complete - Complete contract (admin)

Payments (/api/payments)

• GET / - Get payments
• GET /{id} - Get payment details
• POST / - Create payment request (admin)
• POST /{id}/process - Process payment
• POST /{id}/intent - Create Stripe payment intent
• POST /{id}/confirm - Confirm payment
• GET /invoices - Get invoices
• POST /invoices - Create invoice (admin)

Messages (/api/messages)

• GET / - Get messages
• GET /{id} - Get message details
• POST / - Send message
• POST /{id}/reply - Reply to message
• PUT /{id}/read - Mark message as read
• GET /unread-count - Get unread message count
• GET /notifications - Get notifications
• PUT /notifications/{id}/read - Mark notification as read

Files (/api/files)

• POST /upload - Upload general file
• GET /download/{path} - Download file
• GET /info/{path} - Get file information
• DELETE /delete/{path} - Delete file

Admin (/api/admin)

• GET /dashboard - Get admin dashboard
• GET /users - Get all users
• GET /users/{id} - Get user details
• PUT /users/{id}/status - Update user status
• PUT /users/{id}/verification - Update verification status
• GET /project-types - Manage project types
• POST /project-types - Create project type
• GET /activity-logs - Get activity logs
• POST /system/cleanup - System cleanup
• POST /system/broadcast - Broadcast message

Installation & Setup

Prerequisites

• Python 3.11+
• PostgreSQL 14+
• Virtual environment

1. Clone and Setup

cd alphazee_backend
python -m venv venv
source venv/bin/activate  # On Windows: venv\Scripts\activate
pip install -r requirements.txt

2. Database Setup

# Install PostgreSQL
sudo apt update
sudo apt install postgresql postgresql-contrib

# Start PostgreSQL
sudo systemctl start postgresql
sudo systemctl enable postgresql

# Create database and user
sudo -u postgres createdb alphazee_db
sudo -u postgres psql -c "CREATE USER alphazee_user WITH PASSWORD 'alphazee_password';"
sudo -u postgres psql -c "GRANT ALL PRIVILEGES ON DATABASE alphazee_db TO alphazee_user;"
sudo -u postgres psql -c "ALTER USER alphazee_user CREATEDB;"

3. Environment Configuration

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

4. Database Migration

export FLASK_APP=src/main.py
flask db init
flask db migrate -m "Initial migration"
flask db upgrade

5. Run Application

python src/main.py

The application will be available at http://localhost:5000

Environment Variables

# Flask Configuration
SECRET_KEY=your-secret-key-here
JWT_SECRET_KEY=your-jwt-secret-key-here

# Database Configuration
DATABASE_URL=postgresql://alphazee_user:alphazee_password@localhost/alphazee_db

# Email Configuration
MAIL_SERVER=smtp.gmail.com
MAIL_PORT=587
MAIL_USE_TLS=true
MAIL_USERNAME=your-email@gmail.com
MAIL_PASSWORD=your-app-password
MAIL_DEFAULT_SENDER=noreply@alphazee.com

# Stripe Configuration
STRIPE_PUBLISHABLE_KEY=pk_test_your-stripe-publishable-key
STRIPE_SECRET_KEY=sk_test_your-stripe-secret-key

# Application URLs
FRONTEND_URL=http://localhost:5173
BACKEND_URL=http://localhost:5000

# CORS Configuration
CORS_ORIGINS=http://localhost:5173,http://localhost:3000

Production Deployment

Using Gunicorn

pip install gunicorn
gunicorn -w 4 -b 0.0.0.0:5000 src.main:app

Using Docker

FROM python:3.11-slim

WORKDIR /app
COPY requirements.txt .
RUN pip install -r requirements.txt

COPY . .
EXPOSE 5000

CMD ["gunicorn", "-w", "4", "-b", "0.0.0.0:5000", "src.main:app"]

Environment Setup for Production

• Set DEBUG=False
• Use strong secret keys
• Configure proper database credentials
• Set up SSL/TLS certificates
• Configure email server
• Set up Stripe production keys
• Configure file storage (AWS S3 recommended)

Security Features

• JWT token-based authentication
• Password hashing with bcrypt
• CORS protection
• SQL injection prevention with SQLAlchemy ORM
• File upload validation
• Rate limiting (can be added with Flask-Limiter)
• Input validation and sanitization

File Storage

The system supports both local file storage and AWS S3:

Local Storage

Files are stored in the uploads/ directory with organized subdirectories:

• avatars/ - User profile pictures
• identity/front_id/ - Front ID card images
• identity/back_id/ - Back ID card images
• identity/signatures/ - Digital signatures
• projects/{project_id}/ - Project files
• contracts/{contract_id}/signatures/ - Contract signatures

AWS S3 Storage

Configure AWS credentials in environment variables to use S3 storage.

Testing

The application includes comprehensive error handling and logging. Test the API endpoints using:

# Health check
curl http://localhost:5000/api/health

# Test project types endpoint
curl http://localhost:5000/api/projects/types

Monitoring & Logging

• Application logs are written to console and can be redirected to files
• Activity logging tracks all user actions
• Database queries are logged in debug mode
• Error handling with proper HTTP status codes

Support

For issues or questions regarding the backend implementation, please refer to the code comments and documentation within each module.

License

This backend implementation is proprietary software for AlphaZee Client Platform.