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
33 lines
1.3 KiB
Python
33 lines
1.3 KiB
Python
from sqlalchemy import Column, Integer, String, DateTime, Boolean, Text, ForeignKey, 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 NotificationType(PyEnum):
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MESSAGE = "message"
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MENTION = "mention"
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GROUP_INVITE = "group_invite"
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GROUP_JOIN = "group_join"
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GROUP_LEAVE = "group_leave"
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class Notification(Base):
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__tablename__ = "notifications"
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id = Column(Integer, primary_key=True, index=True)
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user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
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chat_id = Column(Integer, ForeignKey("chats.id"), nullable=True)
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message_id = Column(Integer, ForeignKey("messages.id"), nullable=True)
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notification_type = Column(Enum(NotificationType), nullable=False)
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title = Column(String, nullable=False)
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body = Column(Text, nullable=False)
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data = Column(Text, nullable=True) # JSON data for additional info
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is_read = Column(Boolean, default=False)
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is_sent = Column(Boolean, default=False) # Push notification sent
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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read_at = Column(DateTime(timezone=True), nullable=True)
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# Relationships
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user = relationship("User")
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chat = relationship("Chat")
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message = relationship("Message") |