init

backend/app/routers/messages.py

@@ -0,0 +1,38 @@
+from uuid import UUID
+from fastapi import APIRouter, Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+from sqlalchemy.orm import selectinload
+from ..database import get_db
+from ..models.message import Message
+from ..schemas.message import MessageResponse
+
+router = APIRouter(prefix="/api/rooms", tags=["messages"])
+
+
+@router.get("/{room_id}/messages", response_model=list[MessageResponse])
+async def get_messages(
+    room_id: UUID,
+    limit: int = 50,
+    db: AsyncSession = Depends(get_db),
+):
+    result = await db.execute(
+        select(Message)
+        .options(selectinload(Message.user))
+        .where(Message.room_id == room_id)
+        .order_by(Message.created_at.desc())
+        .limit(limit)
+    )
+    messages = result.scalars().all()
+
+    return [
+        MessageResponse(
+            id=msg.id,
+            room_id=msg.room_id,
+            user_id=msg.user_id,
+            username=msg.user.username,
+            text=msg.text,
+            created_at=msg.created_at,
+        )
+        for msg in reversed(messages)
+    ]