Init

2026-07-27 10:34:53 +08:00
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+"""ビックカメラ楽天市場店（biccamera.rakuten.co.jp）商品页解析
+
+Nuxt 应用，整页数据内联在 `window.__NUXT__`（纯 JSON 对象，可直接增量解析）。
+商品主体在 `state.item`，字段命名已经很接近市场侧语义，且直接给出市场的
+shop_id / genre_id / 分类路径与库存数。
+
+站点不提供：SKU 组合（该店商品都是单一规格）、商品评分（异步加载）。
+"""
+from __future__ import annotations
+
+import json
+import re
+
+from app.core.errors import ScrapeParseError
+from app.models.scrape import (
+    Breadcrumb,
+    ItemDetailData,
+    PurchaseInfo,
+    ShippingInfo,
+    ShopSummary,
+    SkuInfo,
+)
+from app.parsers.subsites.base import SubsitePage
+from app.utils.coerce import as_dict, as_int, as_list, as_str
+
+HOST = "biccamera.rakuten.co.jp"
+SOURCE = "biccamera"
+SHOP_NAME = "ビックカメラ楽天市場店"
+
+_NUXT_RE = re.compile(r"window\.__NUXT__\s*=\s*")
+_CATEGORY_URL = "https://www.rakuten.co.jp/category/{}/"
+
+
+def validate(html: str) -> str | None:
+    if _NUXT_RE.search(html):
+        return None
+    return f"biccamera nuxt state not found (body {len(html)} bytes)"
+
+
+def _extract_nuxt(html: str) -> dict:
+    match = _NUXT_RE.search(html)
+    if match is None:
+        raise ScrapeParseError("ビックカメラ页面未找到 window.__NUXT__")
+    try:
+        state, _ = json.JSONDecoder().raw_decode(html, match.end())
+    except ValueError as exc:
+        raise ScrapeParseError(f"window.__NUXT__ 解析失败：{exc}") from exc
+    if not isinstance(state, dict):
+        raise ScrapeParseError("window.__NUXT__ 不是 JSON 对象")
+    return state
+
+
+def _purchase_info(state: dict, item: dict) -> PurchaseInfo:
+    """该站加购走自己的 JSON 接口，字段与市场完全不同（没有 shop_bid）
+
+    选项（choices）的取值结构未取到样本验证，因此只如实回报「有没有选项」，
+    不给出可能不准确的选项定义——带选项的商品需要调用方另行处理。
+    """
+    choices = as_list(state.get("choices"))
+    return PurchaseInfo(
+        cart_url=as_str(item.get("add_cart_api_url")),
+        form_fields={"item_id": str(as_int(item.get("item_id")))},
+        quantity_field="units",
+        options_field="choice" if choices else "",
+        has_required_options=bool(choices),
+    )
+
+
+def parse(page: SubsitePage) -> ItemDetailData:
+    """解析ビックカメラ商品页"""
+    nuxt = _extract_nuxt(page.html)
+    item = as_dict(as_dict(nuxt.get("state")).get("item"))
+    if not item or not as_str(item.get("item_name")):
+        raise ScrapeParseError("ビックカメラ页面缺少 state.item")
+
+    sold_out = bool(item.get("sold_out_flag"))
+    inventory = as_int(item.get("inventory"))
+    delivery = as_str(item.get("delivery_schedule_text"))
+
+    breadcrumbs = [
+        Breadcrumb(
+            name=as_str(genre.get("genre_name")),
+            url=_CATEGORY_URL.format(as_str(genre.get("genre_id"))),
+        )
+        for genre in as_list(item.get("genres"))
+        if isinstance(genre, dict) and as_str(genre.get("genre_name"))
+    ]
+
+    images = [
+        as_str(image.get("url"))
+        for image in as_list(item.get("images"))
+        if isinstance(image, dict) and as_str(image.get("url"))
+    ]
+
+    shop_code = as_str(item.get("shop_url")) or page.shop_code
+    return ItemDetailData(
+        source=SOURCE,
+        source_url=page.final_url,
+        item_id=str(as_int(item.get("item_id"))) if item.get("item_id") is not None else "",
+        item_code=as_str(item.get("item_number")) or page.item_code,
+        item_name=as_str(item.get("item_name")),
+        catch_copy=as_str(item.get("catch_copy")),
+        description=as_str(item.get("caption")),
+        item_url=page.requested_url,
+        price=as_int(item.get("price_with_tax")),
+        pre_tax_price=as_int(item.get("original_price")),
+        tax_flag=bool(item.get("included_tax_flag")),
+        purchase_condition="soldOut" if sold_out else "enabled",
+        is_sold_out=sold_out,
+        purchase_unit=as_int(item.get("units")),
+        images=images,
+        shop=ShopSummary(
+            shop_id=as_int(item.get("shop_id")) or None,
+            shop_code=shop_code,
+            shop_name=SHOP_NAME,
+            shop_url=f"https://www.rakuten.co.jp/{shop_code}/",
+        ),
+        genre_id=str(as_int(item.get("genre_id"))) if item.get("genre_id") is not None else "",
+        breadcrumbs=breadcrumbs,
+        shipping=ShippingInfo(
+            # 该店商品价格含运费时站点会置位此标记，不再单独给运费金额
+            is_shipping_free=bool(item.get("included_shipping_fee_flag")),
+            delivery_message=delivery,
+        ),
+        sku=SkuInfo(
+            inventory_type="single",
+            quantity=inventory,
+            show_inventory=inventory > 0,
+            delivery_message=delivery,
+        ),
+        purchase=_purchase_info(as_dict(nuxt.get("state")), item),
+    )