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| 1 | +// app/sitemap.ts |
| 2 | +import type { MetadataRoute } from "next"; |
| 3 | +import fs from "node:fs/promises"; |
| 4 | +import path from "node:path"; |
| 5 | +import { source } from "@/lib/source"; |
| 6 | + |
| 7 | +const RAW_SITE_URL = |
| 8 | + process.env.NEXT_PUBLIC_SITE_URL ?? "https://involutionhell.vercel.app"; |
| 9 | +const SITE_URL = normalizeSiteUrl(RAW_SITE_URL); |
| 10 | +const DOCS_DIR = path.join(process.cwd(), "app/docs"); |
| 11 | + |
| 12 | +type SourcePage = ReturnType<typeof source.getPages>[number]; |
| 13 | +type DateLike = string | number | Date | undefined | null; |
| 14 | + |
| 15 | +export default async function sitemap(): Promise<MetadataRoute.Sitemap> { |
| 16 | + const pages = source.getPages(); |
| 17 | + |
| 18 | + const docsEntries = await Promise.all( |
| 19 | + pages.filter((p) => !isDraftOrHidden(p)).map((p) => buildDocsEntry(p)), |
| 20 | + ); |
| 21 | + |
| 22 | + const homeEntry: MetadataRoute.Sitemap[number] = { |
| 23 | + url: SITE_URL, // 已去尾斜杠，这里就是 https://xxx |
| 24 | + lastModified: new Date(), |
| 25 | + changeFrequency: "weekly", |
| 26 | + priority: 1, |
| 27 | + }; |
| 28 | + |
| 29 | + // 去重并排序（避免重复 slug） |
| 30 | + const unique = new Map(docsEntries.map((e) => [e.url, e])); |
| 31 | + return [ |
| 32 | + homeEntry, |
| 33 | + ...[...unique.values()].sort((a, b) => a.url.localeCompare(b.url)), |
| 34 | + ]; |
| 35 | +} |
| 36 | + |
| 37 | +async function buildDocsEntry( |
| 38 | + page: SourcePage, |
| 39 | +): Promise<MetadataRoute.Sitemap[number]> { |
| 40 | + const slugPath = sanitizeSlugPath(page.slugs); |
| 41 | + // 根文档：/docs 或 /docs/<segments> |
| 42 | + const url = slugPath ? `${SITE_URL}/docs/${slugPath}` : `${SITE_URL}/docs`; |
| 43 | + |
| 44 | + const fmDate = extractDateFromPage(page); |
| 45 | + const filePath = path.resolve(DOCS_DIR, page.file.path); |
| 46 | + const fileDate = await getFileLastModified(filePath); |
| 47 | + |
| 48 | + const entry: MetadataRoute.Sitemap[number] = { |
| 49 | + url, |
| 50 | + changeFrequency: "monthly", |
| 51 | + priority: 0.6, |
| 52 | + ...(fmDate |
| 53 | + ? { lastModified: fmDate } |
| 54 | + : fileDate |
| 55 | + ? { lastModified: fileDate } |
| 56 | + : {}), |
| 57 | + }; |
| 58 | + |
| 59 | + return entry; |
| 60 | +} |
| 61 | + |
| 62 | +function extractDateFromPage(page: SourcePage): Date | undefined { |
| 63 | + const data = page.data as { |
| 64 | + date?: DateLike; |
| 65 | + updated?: DateLike; |
| 66 | + updatedAt?: DateLike; |
| 67 | + lastUpdated?: DateLike; |
| 68 | + draft?: boolean; |
| 69 | + hidden?: boolean; |
| 70 | + frontmatter?: { |
| 71 | + date?: DateLike; |
| 72 | + updated?: DateLike; |
| 73 | + updatedAt?: DateLike; |
| 74 | + lastUpdated?: DateLike; |
| 75 | + draft?: boolean; |
| 76 | + hidden?: boolean; |
| 77 | + }; |
| 78 | + }; |
| 79 | + |
| 80 | + const candidates: DateLike[] = [ |
| 81 | + data?.updatedAt, |
| 82 | + data?.updated, |
| 83 | + data?.lastUpdated, |
| 84 | + data?.date, |
| 85 | + data?.frontmatter?.updatedAt, |
| 86 | + data?.frontmatter?.updated, |
| 87 | + data?.frontmatter?.lastUpdated, |
| 88 | + data?.frontmatter?.date, |
| 89 | + ]; |
| 90 | + |
| 91 | + for (const c of candidates) { |
| 92 | + const parsed = normalizeDate(c); |
| 93 | + if (parsed) return parsed; |
| 94 | + } |
| 95 | + return undefined; |
| 96 | +} |
| 97 | + |
| 98 | +function normalizeDate(value: DateLike): Date | undefined { |
| 99 | + if (!value) return undefined; |
| 100 | + if (value instanceof Date) return isNaN(value.getTime()) ? undefined : value; |
| 101 | + const d = new Date(value); |
| 102 | + return isNaN(d.getTime()) ? undefined : d; |
| 103 | +} |
| 104 | + |
| 105 | +async function getFileLastModified( |
| 106 | + filePath: string, |
| 107 | +): Promise<Date | undefined> { |
| 108 | + try { |
| 109 | + const stats = await fs.stat(filePath); |
| 110 | + return stats.mtime; |
| 111 | + } catch { |
| 112 | + return undefined; |
| 113 | + } |
| 114 | +} |
| 115 | + |
| 116 | +function sanitizeSlugPath(slugs: string[]): string { |
| 117 | + // 过滤空段并对每段进行 URL 编码 |
| 118 | + return slugs |
| 119 | + .filter(Boolean) |
| 120 | + .map((s) => encodeURIComponent(s)) |
| 121 | + .join("/"); |
| 122 | +} |
| 123 | + |
| 124 | +function isDraftOrHidden(page: SourcePage): boolean { |
| 125 | + const d: any = page.data ?? {}; |
| 126 | + return !!( |
| 127 | + d.draft || |
| 128 | + d.hidden || |
| 129 | + d.frontmatter?.draft || |
| 130 | + d.frontmatter?.hidden |
| 131 | + ); |
| 132 | +} |
| 133 | + |
| 134 | +function normalizeSiteUrl(url: string): string { |
| 135 | + // 必须有协议，去尾斜杠 |
| 136 | + const withProto = /^https?:\/\//i.test(url) ? url : `https://${url}`; |
| 137 | + return withProto.replace(/\/+$/, ""); |
| 138 | +} |
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