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`https://news.google.com/rss/search?q=${q}&hl=zh-CN&gl=CN&ceid=CN:zh-Hans`\n : `https://news.google.com/rss/search?q=${q}&hl=en-US&gl=US&ceid=US:en`;\n}\n\n// 规范化链接，去掉 Google News 跳转参数带来的重复\nfunction normalizeLink(link: string): string {\n try {\n const u = new URL(link);\n u.hash = \"\";\n [\n \"utm_source\",\n \"utm_medium\",\n \"utm_campaign\",\n \"utm_term\",\n \"utm_content\",\n \"oc\",\n ].forEach((p) => u.searchParams.delete(p));\n return u.toString();\n } catch {\n return link;\n }\n}\n\nasync function fetchFeed(url: string, lang: \"zh\" | \"en\"): Promise {\n const parser = new RssParser({ timeout: CONFIG.fetchTimeoutMs });\n try {\n const controller = new AbortController();\n const timer = setTimeout(() => controller.abort(), CONFIG.fetchTimeoutMs);\n const res = await fetch(url, {\n signal: controller.signal,\n headers: { \"User-Agent\": \"Mozilla/5.0 (compatible; CarBodyRadar/1.0)\" },\n });\n clearTimeout(timer);\n if (!res.ok) throw new Error(`HTTP ${res.status}`);\n const xml = await res.text();\n const feed = await parser.parseString(xml);\n return (feed.items || []).map((item) => {\n // Google News 标题格式常为 \"标题 - 来源\"，拆出来源更清晰\n const rawTitle = (item.title || \"\").trim();\n const splitIdx = rawTitle.lastIndexOf(\" - \");\n const title = splitIdx > 0\n ? rawTitle.slice(0, splitIdx).trim()\n : rawTitle;\n const source = splitIdx > 0\n ? rawTitle.slice(splitIdx + 3).trim()\n : (item.creator || \"\");\n return {\n title,\n link: normalizeLink(item.link || \"\"),\n source,\n pubDate: item.isoDate ||\n (item.pubDate ? new Date(item.pubDate).toISOString() : \"\"),\n lang,\n } as Article;\n });\n } catch (err) {\n console.warn(`抓取失败 [${lang}] ${url}: ${(err as Error).message}`);\n return [];\n }\n}\n\nfunction isRecent(iso: string, sinceMs: number): boolean {\n if (!iso) return false;\n const t = new Date(iso).getTime();\n return !isNaN(t) && t >= sinceMs;\n}\n\nfunction escapeHtml(s: string): string {\n return s\n .replace(/&/g, \"&\")\n .replace(//g, \">\")\n .replace(/\"/g, \""\");\n}\n\nfunction fmtDate(iso: string): string {\n if (!iso) return \"\";\n const d = new Date(iso);\n if (isNaN(d.getTime())) return \"\";\n return d.toISOString().slice(0, 10);\n}\n\n// ----------------------------------------------------------------------------\n// 4) 邮件发送：优先用 Resend（可发任意邮箱），否则回退到 Val Town 内置 std/email\n// - 想发到“指定邮箱”：设置环境变量 RESEND_API_KEY + RECIPIENT_EMAIL\n// - 若你是 Val Town Pro：设置 RECIPIENT_EMAIL 即可用内置发信到该邮箱\n// - 都不设置：内置发信默认发到你自己的 Val Town 账号邮箱\n// ----------------------------------------------------------------------------\nasync function sendEmail(subject: string, html: string) {\n const resendKey = Deno.env.get(\"RESEND_API_KEY\");\n const recipient = Deno.env.get(\"RECIPIENT_EMAIL\");\n\n if (resendKey && recipient) {\n const from = Deno.env.get(\"RESEND_FROM\") || \"onboarding@resend.dev\";\n const res = await fetch(\"https://api.resend.com/emails\", {\n method: \"POST\",\n headers: {\n Authorization: `Bearer ${resendKey}`,\n \"Content-Type\": \"application/json\",\n },\n body: JSON.stringify({ from, to: [recipient], subject, html }),\n });\n if (!res.ok) {\n const body = await res.text();\n throw new Error(`Resend 发送失败: HTTP ${res.status} ${body}`);\n }\n console.log(`已通过 Resend 发送至 ${recipient}`);\n return;\n }\n\n // 回退：Val Town 内置发信。Pro 账号可用 to 发给任意人；免费账号 to 会被忽略、发给本人。\n await email({\n to: recipient || undefined,\n subject,\n html,\n });\n console.log(\n `已通过 std/email 发送${\n recipient\n ? `（to=${recipient}，需 Pro 才能发给他人）`\n : \"（发送到账号邮箱）\"\n }`,\n );\n}\n\n// ----------------------------------------------------------------------------\n// 5) 主流程（Cron 入口）\n// ----------------------------------------------------------------------------\nexport default async function (interval: { lastRunAt?: Date } = {}) {\n const now = Date.now();\n // 兜底时间窗：取“上次运行时间”与“lookbackDays”里更早的那个，避免漏内容\n const lookbackMs = now - CONFIG.lookbackDays * 24 * 3600 * 1000;\n const lastRunMs = interval?.lastRunAt\n ? new Date(interval.lastRunAt).getTime()\n : lookbackMs;\n const sinceMs = Math.min(\n lookbackMs,\n isNaN(lastRunMs) ? lookbackMs : lastRunMs,\n );\n\n // 读取已推送过的链接集合（去重）\n let seen: Record = {};\n try {\n seen = (await blob.getJSON(CONFIG.blobKey)) || {};\n } catch {\n seen = {};\n }\n\n // 按主题抓取\n const grouped: { topic: Topic; items: Article[] }[] = [];\n let totalNew = 0;\n\n for (const topic of TOPICS) {\n const queries: { q: string; lang: \"zh\" | \"en\" }[] = [];\n if (CONFIG.fetchZh) {\n topic.zh.forEach((q) => queries.push({ q, lang: \"zh\" }));\n }\n if (CONFIG.fetchEn) {\n topic.en.forEach((q) => queries.push({ q, lang: \"en\" }));\n }\n\n const feeds = await Promise.all(\n queries.map(({ q, lang }) => fetchFeed(googleNewsUrl(q, lang), lang)),\n );\n const flat = feeds.flat();\n\n // 主题内去重（按链接），并过滤时间窗 + 全局已推送\n const dedupInTopic = new Map();\n for (const a of flat) {\n if (!a.link || !a.title) continue;\n if (!isRecent(a.pubDate, sinceMs)) continue;\n if (seen[a.link]) continue; // 已经推送过\n if (!dedupInTopic.has(a.link)) dedupInTopic.set(a.link, a);\n }\n\n // 按发布时间倒序，取前 N 条\n const items = [...dedupInTopic.values()]\n .sort((x, y) =>\n new Date(y.pubDate).getTime() - new Date(x.pubDate).getTime()\n )\n .slice(0, CONFIG.maxItemsPerTopic);\n\n items.forEach((a) => (seen[a.link] = now));\n totalNew += items.length;\n grouped.push({ topic, items });\n }\n\n // 清理去重库，避免无限膨胀\n const seenEntries = Object.entries(seen).sort((a, b) => b[1] - a[1]);\n if (seenEntries.length > CONFIG.maxSeenLinks) {\n seen = Object.fromEntries(seenEntries.slice(0, CONFIG.maxSeenLinks));\n }\n await blob.setJSON(CONFIG.blobKey, seen);\n\n if (totalNew === 0) {\n console.log(\"本次没有新内容，跳过发送。\");\n return { totalNew: 0 };\n }\n\n // 生成邮件 HTML\n const html = renderEmail(grouped, totalNew, sinceMs, now);\n const dateStr = new Date(now).toISOString().slice(0, 10);\n await sendEmail(`【车身前沿情报】${dateStr} · 新增 ${totalNew} 条`, html);\n\n console.log(`完成：共推送 ${totalNew} 条。`);\n return { totalNew };\n}\n\n// ----------------------------------------------------------------------------\n// 6) 邮件模板\n// ----------------------------------------------------------------------------\nfunction renderEmail(\n grouped: { topic: Topic; items: Article[] }[],\n totalNew: number,\n sinceMs: number,\n now: number,\n): string {\n const sinceStr = new Date(sinceMs).toISOString().slice(0, 10);\n const nowStr = new Date(now).toISOString().slice(0, 10);\n\n const sections = grouped\n .filter((g) => g.items.length > 0)\n .map((g) => {\n const rows = g.items\n .map((a) => {\n const flag = a.lang === \"zh\" ? \"国内\" : \"国外\";\n const meta = [a.source, fmtDate(a.pubDate)].filter(Boolean).join(\n \" · \",\n );\n return `\n

\n \n ${escapeHtml(a.title)}\n \n

\n ${flag}\n ${escapeHtml(meta)}\n

`;\n })\n .join(\"\");\n return `\n

\n ${escapeHtml(g.topic.label)}\n （${g.items.length}）\n

${rows}\n

`;\n })\n .join(\"\");\n\n return `\n

车身开发前沿情报

新材料 · 新工艺 · 新技术｜${sinceStr} ~ ${nowStr}｜共 ${totalNew} 条

\n ${sections}\n

\n 本邮件由部署在 Val Town 的自动化程序生成，数据来源：Google News（中/英）。\n 如需调整关注方向或推送频率，请修改 Val 中的 TOPICS / Cron 配置。\n

`;\n}","// ============================================================================\n// 车身开发前沿情报机器人 (Car Body Material & Process Radar)\n// ----------------------------------------------------------------------------\n// 面向车身开发工程师，自动抓取国内外关于新材料 / 新工艺 / 新技术的实时资讯，\n// 去重、按主题归类后，通过邮件定时推送。\n//\n// 部署平台：Val Town (https://val.town) —— 这是一个 Cron 触发的 Val。\n// 运行时：Deno（支持 npm: 导入）。\n//\n// 触发方式：把本文件设为 Cron 触发，建议每周一、周四各一次（见 README）。\n// ============================================================================\n\nimport { email } from \"https://esm.town/v/std/email\";\nimport { blob } from \"https://esm.town/v/std/blob\";\nimport RssParser from \"npm:rss-parser\";\n\n// ----------------------------------------------------------------------------\n// 1) 关注的主题与检索关键词\n// 每个主题包含中文与英文关键词，分别去抓国内源和国外源。\n// 需要增删方向时，直接改这里即可。\n// ----------------------------------------------------------------------------\ninterface Topic {\n id: string;\n label: string; // 邮件里显示的中文分组名\n zh: string[]; // 中文检索词（Google News 中文）\n en: string[]; // 英文检索词（Google News 英文）\n}\n\nconst TOPICS: Topic[] = [\n {\n id: \"steel\",\n label: \"新型高强钢\",\n zh: [\"汽车第三代高强钢\", \"车身热成形钢\", \"汽车超高强钢应用\"],\n en: [\"automotive third generation AHSS\", \"car body press hardened steel\", \"gigapascal steel automotive\"],\n },\n {\n id: \"aldiecast\",\n label: \"压铸铝合金 / 一体化压铸\",\n zh: [\"一体化压铸车身\", \"免热处理压铸铝合金\", \"超大型压铸汽车\"],\n en: [\"gigacasting car body\", \"heat-free die casting aluminum alloy automotive\", \"megacasting vehicle structure\"],\n },\n {\n id: \"mg\",\n label: \"镁合金\",\n zh: [\"镁合金汽车车身\", \"镁合金压铸汽车轻量化\"],\n en: [\"magnesium alloy automotive body\", \"magnesium die casting vehicle lightweight\"],\n },\n {\n id: \"composite\",\n label: \"低成本复合材料\",\n zh: [\"汽车碳纤维复合材料低成本\", \"车身玻纤复合材料轻量化\", \"热塑性复合材料汽车\"],\n en: [\"low cost carbon fiber automotive\", \"thermoplastic composite car body\", \"glass fiber composite vehicle lightweight\"],\n },\n {\n id: \"energy\",\n label: \"高吸能材料 / 碰撞结构\",\n zh: [\"汽车吸能盒材料\", \"车身碰撞吸能结构新材料\", \"泡沫铝汽车吸能\"],\n en: [\"automotive crash energy absorption material\", \"crashworthiness structure new material vehicle\", \"aluminum foam energy absorbing car\"],\n },\n {\n id: \"joining\",\n label: \"连接工艺\",\n zh: [\"车身自冲铆接 SPR\", \"汽车激光焊接铝\", \"车身异种材料连接胶接\"],\n en: [\"self piercing rivet car body\", \"laser welding aluminum automotive\", \"dissimilar material joining car body adhesive\"],\n },\n];\n\n// ----------------------------------------------------------------------------\n// 2) 运行参数（可按需调整）\n// ----------------------------------------------------------------------------\nconst CONFIG = {\n // 只保留最近多少天内发布的内容（作为兜底窗口；配合去重使用）\n lookbackDays: 4,\n // 每个主题最多展示多少条，避免邮件过长\n maxItemsPerTopic: 6,\n // 去重库里最多保留多少条历史链接，超出后自动清理最旧的\n maxSeenLinks: 4000,\n // 存储去重数据用的 blob key\n blobKey: \"car_body_radar_seen_links\",\n // 抓取语言：由用户选择“中英文都要”\n fetchZh: true,\n fetchEn: true,\n // 单个 RSS 请求超时（毫秒）\n fetchTimeoutMs: 15000,\n};\n\n// ----------------------------------------------------------------------------\n// 3) 工具函数\n// ----------------------------------------------------------------------------\ninterface Article {\n title: string;\n link: string;\n source: string;\n pubDate: string; // ISO 字符串\n lang: \"zh\" | \"en\";\n}\n\nfunction googleNewsUrl(query: string, lang: \"zh\" | \"en\"): string {\n const q = encodeURIComponent(query);\n return lang === \"zh\"\n ? `https://news.google.com/rss/search?q=${q}&hl=zh-CN&gl=CN&ceid=CN:zh-Hans`\n : `https://news.google.com/rss/search?q=${q}&hl=en-US&gl=US&ceid=US:en`;\n}\n\n// 规范化链接，去掉 Google News 跳转参数带来的重复\nfunction normalizeLink(link: string): string {\n try {\n const u = new URL(link);\n u.hash = \"\";\n [\"utm_source\", \"utm_medium\", \"utm_campaign\", \"utm_term\", \"utm_content\", \"oc\"].forEach((p) =>\n u.searchParams.delete(p),\n );\n return u.toString();\n } catch {\n return link;\n }\n}\n\nasync function fetchFeed(url: string, lang: \"zh\" | \"en\"): Promise {\n const parser = new RssParser({ timeout: CONFIG.fetchTimeoutMs });\n try {\n const controller = new AbortController();\n const timer = setTimeout(() => controller.abort(), CONFIG.fetchTimeoutMs);\n const res = await fetch(url, {\n signal: controller.signal,\n headers: { \"User-Agent\": \"Mozilla/5.0 (compatible; CarBodyRadar/1.0)\" },\n });\n clearTimeout(timer);\n if (!res.ok) throw new Error(`HTTP ${res.status}`);\n const xml = await res.text();\n const feed = await parser.parseString(xml);\n return (feed.items || []).map((item) => {\n // Google News 标题格式常为 \"标题 - 来源\"，拆出来源更清晰\n const rawTitle = (item.title || \"\").trim();\n const splitIdx = rawTitle.lastIndexOf(\" - \");\n const title = splitIdx > 0 ? rawTitle.slice(0, splitIdx).trim() : rawTitle;\n const source = splitIdx > 0 ? rawTitle.slice(splitIdx + 3).trim() : (item.creator || \"\");\n return {\n title,\n link: normalizeLink(item.link || \"\"),\n source,\n pubDate: item.isoDate || (item.pubDate ? new Date(item.pubDate).toISOString() : \"\"),\n lang,\n } as Article;\n });\n } catch (err) {\n console.warn(`抓取失败 [${lang}] ${url}: ${(err as Error).message}`);\n return [];\n }\n}\n\nfunction isRecent(iso: string, sinceMs: number): boolean {\n if (!iso) return false;\n const t = new Date(iso).getTime();\n return !isNaN(t) && t >= sinceMs;\n}\n\nfunction escapeHtml(s: string): string {\n return s\n .replace(/&/g, \"&\")\n .replace(//g, \">\")\n .replace(/\"/g, \""\");\n}\n\nfunction fmtDate(iso: string): string {\n if (!iso) return \"\";\n const d = new Date(iso);\n if (isNaN(d.getTime())) return \"\";\n return d.toISOString().slice(0, 10);\n}\n\n// ----------------------------------------------------------------------------\n// 4) 邮件发送：使用 Val Town 内置 std/email，直接发到你的 Val Town 账号邮箱。\n// 不传 to，免费版即可正常发送（to 留空时默认发给账号所有者）。\n// ----------------------------------------------------------------------------\nasync function sendEmail(subject: string, html: string) {\n await email({ subject, html });\n console.log(\"已通过 std/email 发送到 Val Town 账号邮箱\");\n}\n\n// ----------------------------------------------------------------------------\n// 5) 主流程（Cron 入口）\n// ----------------------------------------------------------------------------\nexport default async function (interval: { lastRunAt?: Date } = {}) {\n const now = Date.now();\n // 兜底时间窗：取“上次运行时间”与“lookbackDays”里更早的那个，避免漏内容\n const lookbackMs = now - CONFIG.lookbackDays * 24 * 3600 * 1000;\n const lastRunMs = interval?.lastRunAt ? new Date(interval.lastRunAt).getTime() : lookbackMs;\n const sinceMs = Math.min(lookbackMs, isNaN(lastRunMs) ? lookbackMs : lastRunMs);\n\n // 读取已推送过的链接集合（去重）\n let seen: Record = {};\n try {\n seen = (await blob.getJSON(CONFIG.blobKey)) || {};\n } catch {\n seen = {};\n }\n\n // 按主题抓取\n const grouped: { topic: Topic; items: Article[] }[] = [];\n let totalNew = 0;\n\n for (const topic of TOPICS) {\n const queries: { q: string; lang: \"zh\" | \"en\" }[] = [];\n if (CONFIG.fetchZh) topic.zh.forEach((q) => queries.push({ q, lang: \"zh\" }));\n if (CONFIG.fetchEn) topic.en.forEach((q) => queries.push({ q, lang: \"en\" }));\n\n const feeds = await Promise.all(queries.map(({ q, lang }) => fetchFeed(googleNewsUrl(q, lang), lang)));\n const flat = feeds.flat();\n\n // 主题内去重（按链接），并过滤时间窗 + 全局已推送\n const dedupInTopic = new Map();\n for (const a of flat) {\n if (!a.link || !a.title) continue;\n if (!isRecent(a.pubDate, sinceMs)) continue;\n if (seen[a.link]) continue; // 已经推送过\n if (!dedupInTopic.has(a.link)) dedupInTopic.set(a.link, a);\n }\n\n // 按发布时间倒序，取前 N 条\n const items = [...dedupInTopic.values()]\n .sort((x, y) => new Date(y.pubDate).getTime() - new Date(x.pubDate).getTime())\n .slice(0, CONFIG.maxItemsPerTopic);\n\n items.forEach((a) => (seen[a.link] = now));\n totalNew += items.length;\n grouped.push({ topic, items });\n }\n\n // 清理去重库，避免无限膨胀\n const seenEntries = Object.entries(seen).sort((a, b) => b[1] - a[1]);\n if (seenEntries.length > CONFIG.maxSeenLinks) {\n seen = Object.fromEntries(seenEntries.slice(0, CONFIG.maxSeenLinks));\n }\n await blob.setJSON(CONFIG.blobKey, seen);\n\n if (totalNew === 0) {\n console.log(\"本次没有新内容，跳过发送。\");\n return { totalNew: 0 };\n }\n\n // 生成邮件 HTML\n const html = renderEmail(grouped, totalNew, sinceMs, now);\n const dateStr = new Date(now).toISOString().slice(0, 10);\n await sendEmail(`【车身前沿情报】${dateStr} · 新增 ${totalNew} 条`, html);\n\n console.log(`完成：共推送 ${totalNew} 条。`);\n return { totalNew };\n}\n\n// ----------------------------------------------------------------------------\n// 6) 邮件模板\n// ----------------------------------------------------------------------------\nfunction renderEmail(\n grouped: { topic: Topic; items: Article[] }[],\n totalNew: number,\n sinceMs: number,\n now: number,\n): string {\n const sinceStr = new Date(sinceMs).toISOString().slice(0, 10);\n const nowStr = new Date(now).toISOString().slice(0, 10);\n\n const sections = grouped\n .filter((g) => g.items.length > 0)\n .map((g) => {\n const rows = g.items\n .map((a) => {\n const flag = a.lang === \"zh\" ? \"国内\" : \"国外\";\n const meta = [a.source, fmtDate(a.pubDate)].filter(Boolean).join(\" · \");\n return `\n

\n \n ${escapeHtml(a.title)}\n \n

\n ${flag}\n ${escapeHtml(meta)}\n

`;\n })\n .join(\"\");\n return `\n

\n ${escapeHtml(g.topic.label)}\n （${g.items.length}）\n

${rows}\n

`;\n })\n .join(\"\");\n\n return `\n

车身开发前沿情报

新材料 · 新工艺 · 新技术｜${sinceStr} ~ ${nowStr}｜共 ${totalNew} 条

\n ${sections}\n

\n 本邮件由部署在 Val Town 的自动化程序生成，数据来源：Google News（中/英）。\n 如需调整关注方向或推送频率，请修改 Val 中的 TOPICS / Cron 配置。\n

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Diff · v4