Initial commit for deployment

app/models/chat.py

@@ -0,0 +1,67 @@
+"""
+Chat models for the application.
+"""
+
+from datetime import datetime
+from app.database.db import db
+
+class Chat(db.Model):
+    """Chat model representing a chat session."""
+    
+    __tablename__ = 'chats'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    title = db.Column(db.String(100), nullable=True)
+    is_team_chat = db.Column(db.Boolean, default=False)
+    model_name = db.Column(db.String(50), nullable=False)
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    # Foreign keys
+    user_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
+    
+    # Relationships
+    messages = db.relationship('Message', backref='chat', lazy='dynamic', cascade='all, delete-orphan')
+    team_members = db.relationship('TeamChatMember', backref='chat', lazy='dynamic', cascade='all, delete-orphan')
+    
+    def __repr__(self):
+        return f'<Chat {self.id}: {self.title or "Untitled"}>'
+
+
+class Message(db.Model):
+    """Message model representing a single message in a chat."""
+    
+    __tablename__ = 'messages'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    content = db.Column(db.Text, nullable=False)
+    is_user_message = db.Column(db.Boolean, default=True)
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    
+    # Foreign keys
+    chat_id = db.Column(db.Integer, db.ForeignKey('chats.id'), nullable=False)
+    user_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=True)
+    
+    def __repr__(self):
+        return f'<Message {self.id}: {self.content[:20]}...>'
+
+
+class TeamChatMember(db.Model):
+    """Model representing a member of a team chat."""
+    
+    __tablename__ = 'team_chat_members'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    joined_at = db.Column(db.DateTime, default=datetime.utcnow)
+    
+    # Foreign keys
+    chat_id = db.Column(db.Integer, db.ForeignKey('chats.id'), nullable=False)
+    user_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
+    
+    # Ensure a user can only be added to a team chat once
+    __table_args__ = (
+        db.UniqueConstraint('chat_id', 'user_id', name='uq_team_chat_member'),
+    )
+    
+    def __repr__(self):
+        return f'<TeamChatMember chat_id={self.chat_id}, user_id={self.user_id}>'