41bbd8c182
Complete rewrite from task management to full-featured chat system: Core Features: - Real-time WebSocket messaging with connection management - Direct messages and group chats with admin controls - Message types: text, images, videos, audio, documents - Message status tracking: sent, delivered, read receipts - Typing indicators and user presence (online/offline) - Message replies, editing, and deletion Security & Encryption: - End-to-end encryption with RSA + AES hybrid approach - JWT authentication for API and WebSocket connections - Secure file storage with access control - Automatic RSA key pair generation per user Media & File Sharing: - Multi-format file upload (images, videos, audio, documents) - Automatic thumbnail generation for images/videos - File size validation and MIME type checking - Secure download endpoints with permission checks Notifications & Alerts: - Real-time WebSocket notifications - Push notifications via Firebase integration - @username mention alerts with notification history - Unread message and mention counting - Custom notification types (message, mention, group invite) Advanced Features: - Group chat management with roles (member, admin, owner) - User search and chat member management - Message pagination and chat history - Last seen timestamps and activity tracking - Comprehensive API documentation with WebSocket events Architecture: - Clean layered architecture with services, models, schemas - WebSocket connection manager for real-time features - Modular notification system with multiple channels - Comprehensive error handling and validation - Production-ready with Docker support Technologies: FastAPI, WebSocket, SQLAlchemy, SQLite, Cryptography, Firebase, Pillow
25 lines
1004 B
Python
25 lines
1004 B
Python
from sqlalchemy import Column, Integer, String, DateTime, Boolean, Text, Enum
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from sqlalchemy.orm import relationship
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from sqlalchemy.sql import func
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from enum import Enum as PyEnum
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from app.db.base import Base
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class ChatType(PyEnum):
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DIRECT = "direct"
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GROUP = "group"
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class Chat(Base):
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__tablename__ = "chats"
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id = Column(Integer, primary_key=True, index=True)
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name = Column(String, nullable=True) # Null for direct messages
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description = Column(Text, nullable=True)
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chat_type = Column(Enum(ChatType), nullable=False)
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avatar_url = Column(String, nullable=True)
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is_active = Column(Boolean, default=True)
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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updated_at = Column(DateTime(timezone=True), onupdate=func.now())
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# Relationships
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messages = relationship("Message", back_populates="chat", cascade="all, delete-orphan")
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members = relationship("ChatMember", back_populates="chat", cascade="all, delete-orphan") |