feat: 初始化项目，并且接近完成 ozon 部分

server/api/products.py

@@ -0,0 +1,71 @@
+"""商品查询 API。"""
+from __future__ import annotations
+
+from uuid import UUID
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy import func, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from db import get_db
+from models import Product, ProductAsset
+from schemas import AssetOut, ProductListOut, ProductOut
+from services import storage
+
+router = APIRouter(prefix="/api", tags=["products"])
+
+
+def _asset_out(a: ProductAsset) -> AssetOut:
+    return AssetOut(
+        id=str(a.id),
+        group_key=a.group_key,
+        variant_name=a.variant_name,
+        type=a.type,
+        source_url=a.source_url,
+        url=a.stored_url,
+        status=a.status,
+    )
+
+
+@router.get("/products", response_model=ProductListOut)
+async def list_products(
+    q: str = "",
+    page: int = 1,
+    page_size: int = 20,
+    db: AsyncSession = Depends(get_db),
+):
+    cond = []
+    if q:
+        cond.append(Product.name.contains(q))
+    total = (await db.scalar(select(func.count()).select_from(Product).where(*cond))) or 0
+    rows = (await db.scalars(
+        select(Product).where(*cond).order_by(Product.created_at.desc())
+        .offset((page - 1) * page_size).limit(page_size)
+    )).all()
+    return ProductListOut(total=total, items=[
+        ProductOut(
+            id=str(p.id), stage=p.stage, source_platform=p.source_platform,
+            source_item_id=p.source_item_id, source_url=p.source_url,
+            name=p.name, description=p.description, price=p.price,
+            asset_counts=p.asset_counts,
+            created_at=p.created_at.isoformat() if p.created_at else None,
+        ) for p in rows
+    ])
+
+
+@router.get("/products/{product_id}", response_model=ProductOut)
+async def get_product(product_id: str, db: AsyncSession = Depends(get_db)):
+    p = await db.get(Product, UUID(product_id))
+    if p is None:
+        raise HTTPException(status_code=404, detail="商品不存在")
+    assets = (await db.scalars(
+        select(ProductAsset).where(ProductAsset.product_id == p.id)
+        .order_by(ProductAsset.sort_order)
+    )).all()
+    return ProductOut(
+        id=str(p.id), stage=p.stage, source_platform=p.source_platform,
+        source_item_id=p.source_item_id, source_url=p.source_url,
+        name=p.name, description=p.description, price=p.price,
+        asset_counts=p.asset_counts, assets=[_asset_out(a) for a in assets],
+        created_at=p.created_at.isoformat() if p.created_at else None,
+    )