init

backend/app/models/__init__.py

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+from .user import User
+from .room import Room, RoomParticipant
+from .track import Track, RoomQueue
+from .message import Message
+
+__all__ = ["User", "Room", "RoomParticipant", "Track", "RoomQueue", "Message"]

backend/app/models/message.py

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+import uuid
+from datetime import datetime
+from sqlalchemy import String, DateTime, Text, ForeignKey
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from ..database import Base
+
+
+class Message(Base):
+    __tablename__ = "messages"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    room_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("rooms.id"), nullable=False)
+    user_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
+    text: Mapped[str] = mapped_column(Text, nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    room = relationship("Room", back_populates="messages")
+    user = relationship("User", back_populates="messages")

backend/app/models/room.py

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+import uuid
+from datetime import datetime
+from sqlalchemy import String, DateTime, Boolean, Integer, ForeignKey
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from ..database import Base
+
+
+class Room(Base):
+    __tablename__ = "rooms"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    name: Mapped[str] = mapped_column(String(100), nullable=False)
+    owner_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
+    current_track_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("tracks.id"), nullable=True)
+    playback_position: Mapped[int] = mapped_column(Integer, default=0)  # milliseconds
+    playback_started_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)  # when playback started
+    is_playing: Mapped[bool] = mapped_column(Boolean, default=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    owner = relationship("User", back_populates="owned_rooms")
+    current_track = relationship("Track", foreign_keys=[current_track_id])
+    participants = relationship("RoomParticipant", back_populates="room", cascade="all, delete-orphan")
+    queue = relationship("RoomQueue", back_populates="room", cascade="all, delete-orphan", order_by="RoomQueue.position")
+    messages = relationship("Message", back_populates="room", cascade="all, delete-orphan")
+
+
+class RoomParticipant(Base):
+    __tablename__ = "room_participants"
+
+    room_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("rooms.id"), primary_key=True)
+    user_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), primary_key=True)
+    joined_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    room = relationship("Room", back_populates="participants")
+    user = relationship("User", back_populates="room_participations")

backend/app/models/track.py

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+import uuid
+from datetime import datetime
+from sqlalchemy import String, DateTime, Integer, ForeignKey
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from ..database import Base
+
+
+class Track(Base):
+    __tablename__ = "tracks"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    title: Mapped[str] = mapped_column(String(255), nullable=False)
+    artist: Mapped[str] = mapped_column(String(255), nullable=False)
+    duration: Mapped[int] = mapped_column(Integer, nullable=False)  # milliseconds
+    s3_key: Mapped[str] = mapped_column(String(500), nullable=False)
+    file_size: Mapped[int] = mapped_column(Integer, nullable=False)  # bytes
+    uploaded_by: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    uploader = relationship("User", back_populates="uploaded_tracks")
+    queue_entries = relationship("RoomQueue", back_populates="track", cascade="all, delete-orphan")
+
+
+class RoomQueue(Base):
+    __tablename__ = "room_queue"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    room_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("rooms.id"), nullable=False)
+    track_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("tracks.id"), nullable=False)
+    position: Mapped[int] = mapped_column(Integer, nullable=False)
+    added_by: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
+
+    # Relationships
+    room = relationship("Room", back_populates="queue")
+    track = relationship("Track", back_populates="queue_entries")
+    added_by_user = relationship("User")

backend/app/models/user.py

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+import uuid
+from datetime import datetime
+from sqlalchemy import String, DateTime
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from ..database import Base
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    username: Mapped[str] = mapped_column(String(50), unique=True, nullable=False)
+    email: Mapped[str] = mapped_column(String(255), unique=True, nullable=False)
+    password_hash: Mapped[str] = mapped_column(String(255), nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    owned_rooms = relationship("Room", back_populates="owner", cascade="all, delete-orphan")
+    uploaded_tracks = relationship("Track", back_populates="uploader")
+    messages = relationship("Message", back_populates="user")
+    room_participations = relationship("RoomParticipant", back_populates="user", cascade="all, delete-orphan")