懂车帝车系概览

1return await (async () => {2  const DCD_BASE = "https://www.dongchedi.com";3  const FALLBACK_SHELL_KEYS = ["__hasUrlCity", "is_gray", "has_gray", "clientIp", "sensitiveSeriesIdList"];4 5  const input = typeof params === "object" && params ? params : {};6 7  function clean(value) {8    return String(value == null ? "" : value).replace(/\s+/g, " ").trim();9  }10 11  function fail(message) {12    throw new Error(message);13  }14 15  function assertPlainObject(value, label) {16    if (!value || typeof value !== "object" || Array.isArray(value)) {17      fail(`${label} 返回的数据结构不符合预期，应为对象。`);18    }19    return value;20  }21 22  function requireText(value, label) {23    const text = clean(value);24    if (!text) {25      fail(`${label} 未包含稳定文本。`);26    }27    return text;28  }29 30  function parseScore(raw) {31    const n = Number(raw);32    if (!Number.isFinite(n) || n <= 0) return null;33    return Number((n / 100).toFixed(2));34  }35 36  function normalizeSeriesId(rawInput) {37    const raw = clean(rawInput);38    const match = raw.match(/series\/(\d+)/) || raw.match(/^(\d+)$/);39    if (!match) {40      fail("series_id 必须是车系数字 ID，或包含 /auto/series/<id> 的链接。");41    }42    return match[1];43  }44 45  function currentSeriesId() {46    const match = String(location.href).match(/series\/(\d+)/);47    return match ? match[1] : "";48  }49 50  function extractPageProps(html) {51    const match = String(html || "").match(/<script id="__NEXT_DATA__"[^>]*>([\s\S]*?)<\/script>/);52    if (!match) return null;53    try {54      const data = JSON.parse(match[1]);55      return data && data.props && data.props.pageProps ? data.props.pageProps : null;56    } catch {57      return null;58    }59  }60 61  function isFallbackShell(pageProps) {62    if (!pageProps || typeof pageProps !== "object") return true;63    return Object.keys(pageProps).filter((key) => !FALLBACK_SHELL_KEYS.includes(key)).length === 0;64  }65 66  async function fetchPageProps(path, label) {67    const response = await fetch(`${DCD_BASE}${path}`, {68      credentials: "include",69      headers: { "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8" },70    });71    if (!response.ok) {72      fail(`${label} 请求失败：HTTP ${response.status}`);73    }74    const pageProps = extractPageProps(await response.text());75    if (!pageProps) {76      fail(`${label} 未返回页面数据，页面结构可能已变化或请求被拦截。`);77    }78    if (isFallbackShell(pageProps)) {79      fail(`${label} 返回空壳页面，车系 ID 可能不存在或页面入口已变化。`);80    }81    return pageProps;82  }83 84  function countOnSaleModels(carModelsData) {85    const tabs = carModelsData?.tab_list;86    if (!Array.isArray(tabs)) return null;87    const tab = tabs.find((item) => item?.tab_key === "online_all") || tabs[0];88    const data = tab?.data;89    if (!Array.isArray(data)) return null;90    return data.filter((item) => item?.info?.car_id ?? item?.info?.id).length;91  }92 93  function formatRank(section) {94    const top = section?.list?.[0];95    if (!top || !top.rank) return "";96    const name = clean(section.rank_name || top.rank_name);97    return name ? `${name} 第${top.rank}名` : `第${top.rank}名`;98  }99 100  function parseSeries(pageProps, seriesId) {101    const head = assertPlainObject(pageProps?.seriesHomeHead, "车系概览");102    const score = pageProps.scoreSimpleInfo || {};103    const rank = pageProps.rankData || {};104    const usedPrice = head.sh_low_Price || head.sh_high_price105      ? `${head.sh_low_Price ?? "?"}-${head.sh_high_price ?? "?"}万`106      : "";107 108    return [109      { field: "series_id", value: seriesId },110      { field: "name", value: requireText(head.series_name, "车系名称") },111      { field: "brand", value: requireText(head.brand_name, "品牌名称") },112      { field: "sub_brand", value: clean(head.sub_brand_name) },113      { field: "official_price", value: head.has_official_price ? clean(head.official_price) : "" },114      { field: "dealer_price", value: head.has_dealer_price ? clean(head.dealer_price) : "" },115      { field: "used_price", value: usedPrice },116      { field: "score", value: parseScore(score.score) },117      {118        field: "review_count",119        value: Number.isFinite(Number(score.total_review_count)) ? Number(score.total_review_count) : null,120      },121      { field: "sale_rank", value: formatRank(rank.sale) },122      { field: "score_rank", value: formatRank(rank.score) },123      { field: "models", value: countOnSaleModels(pageProps.carModelsData) },124      { field: "url", value: `${DCD_BASE}/auto/series/${seriesId}` },125    ];126  }127 128  const seriesId = normalizeSeriesId(input.series_id ?? input.seriesId ?? input.url ?? currentSeriesId());129  const pageProps = await fetchPageProps(`/auto/series/${seriesId}`, `车系 ${seriesId}`);130  return parseSeries(pageProps, seriesId);131})();