From 1b31d4bf30f5029ebfd43ac7653459f47a94d554 Mon Sep 17 00:00:00 2001
From: agent-bot <agent-bot@cloudbison.local>
Date: Mon, 17 Aug 2026 16:56:46 +0000
Subject: [PATCH] WIP checkpoint: Scaffold FastAPI backend project structure

---
 backend/app/models/__init__.py |  6 ++++++
 backend/app/models/asset.py    | 36 ++++++++++++++++++++++++++++++++++
 backend/app/models/session.py  | 18 +++++++++++++++++
 backend/app/models/user.py     | 15 ++++++++++++++
 backend/app/models/world.py    | 27 +++++++++++++++++++++++++
 5 files changed, 102 insertions(+)
 create mode 100644 backend/app/models/__init__.py
 create mode 100644 backend/app/models/asset.py
 create mode 100644 backend/app/models/session.py
 create mode 100644 backend/app/models/user.py
 create mode 100644 backend/app/models/world.py

diff --git a/backend/app/models/__init__.py b/backend/app/models/__init__.py
new file mode 100644
index 0000000..96e2dc3
--- /dev/null
+++ b/backend/app/models/__init__.py
@@ -0,0 +1,6 @@
+from app.models.user import User
+from app.models.session import Session
+from app.models.world import World
+from app.models.asset import Asset
+
+__all__ = ["User", "Session", "World", "Asset"]
diff --git a/backend/app/models/asset.py b/backend/app/models/asset.py
new file mode 100644
index 0000000..ba27c53
--- /dev/null
+++ b/backend/app/models/asset.py
@@ -0,0 +1,36 @@
+from sqlalchemy import Column, Integer, String, ForeignKey, Text, DateTime, Enum as SAEnum
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+import enum
+
+from app.database import Base
+
+
+class AssetType(str, enum.Enum):
+    IMAGE = "image"
+    AUDIO = "audio"
+    VIDEO = "video"
+    DOCUMENT = "document"
+    MODEL_3D = "model_3d"
+    OTHER = "other"
+
+
+class Asset(Base):
+    __tablename__ = "assets"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String(255), nullable=False)
+    description = Column(Text, nullable=True)
+    asset_type = Column(SAEnum(AssetType), nullable=False)
+    file_path = Column(String(512), nullable=False)
+    file_size = Column(Integer, nullable=True)
+    mime_type = Column(String(128), nullable=True)
+    metadata_json = Column(Text, nullable=True)
+    world_id = Column(Integer, ForeignKey("worlds.id"), nullable=True)
+    owner_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    is_public = Column(Integer, default=0, nullable=False)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+
+    owner = relationship("User", back_populates="assets")
+    world = relationship("World", back_populates="assets")
diff --git a/backend/app/models/session.py b/backend/app/models/session.py
new file mode 100644
index 0000000..6f94edb
--- /dev/null
+++ b/backend/app/models/session.py
@@ -0,0 +1,18 @@
+from sqlalchemy import Column, String, DateTime, ForeignKey, Boolean
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from app.database import Base
+
+
+class Session(Base):
+    __tablename__ = "sessions"
+
+    id = Column(String, primary_key=True)
+    user_id = Column(String, ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
+    token = Column(String, unique=True, index=True, nullable=False)
+    expires_at = Column(DateTime(timezone=True), nullable=False)
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+
+    user = relationship("User", back_populates="sessions")
diff --git a/backend/app/models/user.py b/backend/app/models/user.py
new file mode 100644
index 0000000..626a2e0
--- /dev/null
+++ b/backend/app/models/user.py
@@ -0,0 +1,15 @@
+from sqlalchemy import Column, Integer, String, Boolean, DateTime
+from sqlalchemy.sql import func
+from app.database import Base
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True, index=True)
+    username = Column(String(50), unique=True, index=True, nullable=False)
+    email = Column(String(120), unique=True, index=True, nullable=False)
+    hashed_password = Column(String(255), nullable=False)
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
diff --git a/backend/app/models/world.py b/backend/app/models/world.py
new file mode 100644
index 0000000..97e37fc
--- /dev/null
+++ b/backend/app/models/world.py
@@ -0,0 +1,27 @@
+from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, Enum
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+import enum
+
+from app.database import Base
+
+
+class WorldVisibility(enum.Enum):
+    PUBLIC = "public"
+    PRIVATE = "private"
+    FRIENDS_ONLY = "friends_only"
+
+
+class World(Base):
+    __tablename__ = "worlds"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String(255), nullable=False)
+    description = Column(Text, nullable=True)
+    owner_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    visibility = Column(Enum(WorldVisibility), default=WorldVisibility.PUBLIC)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+
+    owner = relationship("User", back_populates="worlds")
+    assets = relationship("Asset", back_populates="world", cascade="all, delete-orphan")