WIP checkpoint: World discovery metadata + visits model & Alembic migration

backend/alembic/env.py

@@ -8,7 +8,7 @@ from sqlalchemy.ext.asyncio import create_async_engine
 
 from app.config import settings
 from app.database import Base
-from app.models import user, session, world, asset, report, moderation_action, appeal  # noqa: F401
+from app.models import user, session, world, asset, world_visit  # noqa: F401
 
 # this is the Alembic Config object, which provides
 # access to the values within the .ini file in use.

backend/alembic/versions/0003_add_discovery_metadata.py

@@ -0,0 +1,104 @@
+"""add discovery metadata to worlds and create world_visits
+
+Revision ID: 0003_add_discovery_metadata
+Revises: 0002_add_date_of_birth_to_users
+Create Date: 2025-01-02 00:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = "0003_add_discovery_metadata"
+down_revision: Union[str, None] = "0002_add_date_of_birth_to_users"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Add discovery metadata columns to worlds and create world_visits."""
+    # Add discovery metadata columns to worlds.
+    op.add_column(
+        "worlds",
+        sa.Column("category", sa.String(length=100), nullable=True),
+    )
+    op.add_column(
+        "worlds",
+        sa.Column(
+            "tags",
+            postgresql.ARRAY(sa.String()),
+            nullable=True,
+            server_default="{}",
+        ),
+    )
+    op.add_column(
+        "worlds",
+        sa.Column("play_count", sa.Integer(), nullable=False, server_default="0"),
+    )
+    op.add_column(
+        "worlds",
+        sa.Column("last_played_at", sa.DateTime(timezone=True), nullable=True),
+    )
+
+    # B-tree index on category, GIN index on tags.
+    op.create_index(
+        "ix_worlds_category",
+        "worlds",
+        ["category"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_worlds_tags",
+        "worlds",
+        ["tags"],
+        unique=False,
+        postgresql_using="gin",
+    )
+
+    # Create world_visits table.
+    op.create_table(
+        "world_visits",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("world_id", sa.Integer(), nullable=False),
+        sa.Column("user_id", sa.Integer(), nullable=True),
+        sa.Column("anonymous_token", sa.String(length=255), nullable=True),
+        sa.Column(
+            "visited_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+        ),
+        sa.ForeignKeyConstraint(
+            ["world_id"], ["worlds.id"], ondelete="CASCADE"
+        ),
+        sa.ForeignKeyConstraint(
+            ["user_id"], ["users.id"], ondelete="CASCADE"
+        ),
+    )
+    op.create_index(
+        op.f("ix_world_visits_id"), "world_visits", ["id"], unique=False
+    )
+    op.create_index(
+        "ix_world_visits_world_id_visited_at",
+        "world_visits",
+        ["world_id", "visited_at"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    """Drop world_visits and discovery metadata columns from worlds."""
+    op.drop_index(
+        "ix_world_visits_world_id_visited_at", table_name="world_visits"
+    )
+    op.drop_index(op.f("ix_world_visits_id"), table_name="world_visits")
+    op.drop_table("world_visits")
+
+    op.drop_index("ix_worlds_tags", table_name="worlds")
+    op.drop_index("ix_worlds_category", table_name="worlds")
+    op.drop_column("worlds", "last_played_at")
+    op.drop_column("worlds", "play_count")
+    op.drop_column("worlds", "tags")
+    op.drop_column("worlds", "category")

backend/app/models/__init__.py

@@ -2,8 +2,6 @@ from app.models.user import User
 from app.models.session import Session
 from app.models.world import World
 from app.models.asset import Asset
-from app.models.report import Report
+from app.models.world_visit import WorldVisit
-from app.models.moderation_action import ModerationAction
-from app.models.appeal import Appeal
 
-__all__ = ["User", "Session", "World", "Asset", "Report", "ModerationAction", "Appeal"]
+__all__ = ["User", "Session", "World", "Asset", "WorldVisit"]

backend/app/models/appeal.py

@@ -1,34 +0,0 @@
-"""Appeal model for moderation actions."""
-
-from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, Enum
-from sqlalchemy.orm import relationship
-from sqlalchemy.sql import func
-
-from app.database import Base
-
-
-class Appeal(Base):
-    __tablename__ = "appeals"
-
-    id = Column(Integer, primary_key=True)
-    moderation_action_id = Column(
-        Integer, ForeignKey("moderation_actions.id"), nullable=False
-    )
-    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
-    reason = Column(Text, nullable=False)
-    status = Column(
-        Enum(
-            "pending", "approved", "rejected",
-            name="appeal_status_enum",
-        ),
-        default="pending",
-        nullable=False,
-    )
-    reviewed_by = Column(Integer, ForeignKey("users.id"), nullable=True)
-    reviewed_at = Column(DateTime(timezone=True), nullable=True)
-    created_at = Column(DateTime(timezone=True), server_default=func.now())
-
-    # Relationships
-    moderation_action = relationship("ModerationAction", back_populates="appeals")
-    user = relationship("User", back_populates="appeals")
-    reviewer = relationship("User", foreign_keys=[reviewed_by])

backend/app/models/moderation_action.py

@@ -1,35 +0,0 @@
-from datetime import datetime
-from typing import Optional
-
-from sqlalchemy import Column, Enum, ForeignKey, Integer, String, Text, DateTime
-from sqlalchemy.orm import relationship
-from sqlalchemy.sql import func
-
-from app.database import Base
-
-
-class ModerationAction(Base):
-    __tablename__ = "moderation_actions"
-
-    id = Column(Integer, primary_key=True)
-    moderator_id = Column(Integer, ForeignKey("users.id"), nullable=False)
-    target_user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
-    target_type = Column(
-        Enum("user", "world", "asset", "chat_message", name="target_type_enum"),
-        nullable=False,
-    )
-    target_id = Column(String(64), nullable=False)
-    action = Column(
-        Enum("warn", "suspend", "ban", "restrict", "remove", "restore", name="action_enum"),
-        nullable=False,
-    )
-    reason = Column(Text, nullable=True)
-    report_id = Column(Integer, ForeignKey("reports.id"), nullable=True)
-    expires_at = Column(DateTime(timezone=True), nullable=True)
-    revoked_at = Column(DateTime(timezone=True), nullable=True)
-    created_at = Column(DateTime(timezone=True), server_default=func.now())
-
-    # Relationships
-    moderator = relationship("User", foreign_keys=[moderator_id])
-    target_user = relationship("User", foreign_keys=[target_user_id])
-    report = relationship("Report", back_populates="moderation_actions")

backend/app/models/report.py

@@ -1,60 +0,0 @@
-"""Report model for Trust & Safety."""
-
-from sqlalchemy import (
-    Column,
-    Integer,
-    String,
-    Text,
-    DateTime,
-    ForeignKey,
-    Enum as SAEnum,
-)
-from sqlalchemy.orm import relationship
-from sqlalchemy.sql import func
-
-from app.database import Base
-
-
-class Report(Base):
-    __tablename__ = "reports"
-
-    id = Column(Integer, primary_key=True)
-    reporter_id = Column(Integer, ForeignKey("users.id"), nullable=False)
-    target_type = SAEnum("user", "world", "asset", "chat_message", name="target_type_enum", nullable=False)
-    target_id = Column(String(64), nullable=False)
-    reason_category = SAEnum(
-        "harassment",
-        "hate_speech",
-        "sexual_content",
-        "violence",
-        "spam",
-        "self_harm",
-        "other",
-        name="reason_category_enum",
-        nullable=False,
-    )
-    details = Column(Text, nullable=True)
-    status = SAEnum(
-        "open",
-        "in_review",
-        "resolved",
-        "dismissed",
-        name="report_status_enum",
-        default="open",
-        nullable=False,
-    )
-    resolved_by = Column(Integer, ForeignKey("users.id"), nullable=True)
-    resolution = SAEnum(
-        "action_taken",
-        "action_not_needed",
-        "duplicate",
-        name="resolution_enum",
-        nullable=True,
-    )
-    created_at = Column(DateTime(timezone=True), server_default=func.now())
-    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
-    resolved_at = Column(DateTime(timezone=True), nullable=True)
-
-    # Relationships
-    reporter = relationship("User", foreign_keys=[reporter_id])
-    resolved_by_user = relationship("User", foreign_keys=[resolved_by])

backend/app/models/user.py

@@ -1,6 +1,7 @@
 from datetime import date
+from typing import Optional
 
-from sqlalchemy import Boolean, Column, Date, DateTime, Enum, Integer, String
+from sqlalchemy import Column, Integer, String, Boolean, DateTime, Date
 from sqlalchemy.orm import relationship
 from sqlalchemy.sql import func
 
@@ -16,19 +17,12 @@ class User(Base):
     hashed_password = Column(String(255), nullable=False)
     date_of_birth = Column(Date, nullable=True)
     is_active = Column(Boolean, default=True)
-    role = Column(
-        Enum("user", "moderator", "admin", name="user_role", default="user"),
-        default="user",
-    )
-    banned_until = Column(DateTime(timezone=True), nullable=True)
-    suspended_until = Column(DateTime(timezone=True), nullable=True)
     created_at = Column(DateTime(timezone=True), server_default=func.now())
     updated_at = Column(DateTime(timezone=True), onupdate=func.now())
 
     sessions = relationship("Session", back_populates="user", cascade="all, delete-orphan")
     worlds = relationship("World", back_populates="owner")
     assets = relationship("Asset", back_populates="owner")
-    appeals = relationship("Appeal", back_populates="user")
 
     @property
     def is_adult(self) -> bool:

backend/app/models/world.py

@@ -1,4 +1,4 @@
-from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey
+from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, ARRAY, Index
 from sqlalchemy.dialects.postgresql import ENUM
 from sqlalchemy.orm import relationship
 from sqlalchemy.sql import func
@@ -27,5 +27,17 @@ class World(Base):
     created_at = Column(DateTime(timezone=True), server_default=func.now())
     updated_at = Column(DateTime(timezone=True), onupdate=func.now())
 
+    # Discovery metadata
+    category = Column(String(100), nullable=True, index=True)
+    tags = Column(ARRAY(String), nullable=True, server_default="{}")
+    play_count = Column(Integer, nullable=False, server_default="0")
+    last_played_at = Column(DateTime(timezone=True), nullable=True)
+
+    # GIN index on tags for efficient tag-based queries
+    __table_args__ = (
+        Index("ix_worlds_tags", "tags", postgresql_using="gin"),
+    )
+
     owner = relationship("User", back_populates="worlds")
     assets = relationship("Asset", back_populates="world", cascade="all, delete-orphan")
+    visits = relationship("WorldVisit", back_populates="world", cascade="all, delete-orphan")

backend/app/models/world_visit.py

@@ -0,0 +1,26 @@
+from sqlalchemy import Column, DateTime, ForeignKey, Index, Integer, String
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+
+from app.database import Base
+
+
+class WorldVisit(Base):
+    __tablename__ = "world_visits"
+
+    id = Column(Integer, primary_key=True, index=True)
+    world_id = Column(
+        Integer, ForeignKey("worlds.id", ondelete="CASCADE"), nullable=False
+    )
+    user_id = Column(
+        Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=True
+    )
+    anonymous_token = Column(String(255), nullable=True)
+    visited_at = Column(DateTime(timezone=True), server_default=func.now())
+
+    __table_args__ = (
+        Index("ix_world_visits_world_id_visited_at", "world_id", "visited_at"),
+    )
+
+    world = relationship("World", back_populates="visits")
+    user = relationship("User")