feat: enhance date formatting

demo/yun/components/test/TestFormatDate.vue

@@ -0,0 +1,18 @@
+<script setup lang="ts">
+import { formatDate } from 'valaxy'
+import type { FormatOptionsWithTZ } from 'date-fns-tz'
+
+defineProps<{ date?: string | number | Date, format?: string, timezone?: string, options?: FormatOptionsWithTZ }>()
+</script>
+
+<template>
+  <div flex="~">
+    <time mr-4>
+      {{ formatDate(date ?? new Date(), format, timezone, options) }}
+    </time>
+
+    <code>
+      {{ format }}
+    </code>
+  </div>
+</template>

demo/yun/pages/posts/date.md

@@ -2,4 +2,73 @@
 title: Date test
 date: 2023-07-19 18:55:53
 # updated: 2023-07-19 18:55:53
+toc: false
 ---
+
+<TestFormatDate format="MMM d" />
+
+<TestFormatDate format="MMM d, yyyy" />
+
+<TestFormatDate date="2023-07-19T00:00:00+08:00" format="d MMM yyyy" />
+
+<TestFormatDate date="1847-05-16T00:01:15.000Z" format="yyyy-MM-dd HH:mm:ss" />
+
+<TestFormatDate format="EEEE, MMMM d, yyyy" />
+
+<TestFormatDate format="EEEE, d MMMM yyyy" />
+
+<TestFormatDate format="yyyyMMdd" />
+
+<TestFormatDate format="yy/MM/dd" />
+
+<TestFormatDate format="HH:mm:ss" />
+
+<TestFormatDate format="h:mm a" />
+
+<TestFormatDate format="hh 'o''clock' a, zzzz" />
+
+<TestFormatDate format="K:mm a, z" />
+
+<TestFormatDate date="2023-07-19T00:00:00+08:00" format="EEEE, d MMMM yyyy" />
+
+<TestFormatDate id="text-time-format-1" date="2023-07-19T00:00:00+08:00" format="yyyyMMdd" :options="{ timeZone: 'Asia/Shanghai'  }" />
+
+<TestFormatDate :date="1722589089" format="yyyyMMdd" />
+
+<TestFormatDate id="text-time-format-2" date="2021.3.1 12:00" format="yyyyMMddHHmmss" :options="{ timeZone: 'Asia/Shanghai'  }" />
+
+<TestFormatDate format="yyMMdd" />
+
+<TestFormatDate date="2021/3/1 12:00" format="yyyy/MM/dd" />
+
+<TestFormatDate id="text-time-format-3" date="2021-12-03 1:07:23" format="yyyy/MM/dd HH:mm" :options="{ timeZone: 'Asia/Shanghai'  }" />
+
+<TestFormatDate format="X" />
+
+<TestFormatDate format="x" />
+
+<TestFormatDate date="2023-07-19 10:55:53Z" format="yyyy-MM-dd'T'HH:mm:ssXXX" />
+
+<TestFormatDate format="yyyy-MM-dd'T'HH:mm:ss.SSSXXX" />
+
+<TestFormatDate :date="1722589089" format="T" />
+
+<TestFormatDate format="R" />
+
+<TestFormatDate format="do" />
+
+<TestFormatDate id="text-time-zone-1" date="2004-06-16T00:00:00+08:00" format="yyyy-MM-dd HH:mm:ssxxx zzz" timezone="Europe/Berlin" :options="{ timeZone: 'Europe/Berlin'  }" />
+
+<TestFormatDate id="text-time-zone-2" date="2004-06-16 00:00:00" format="yyyy-MM-dd HH:mm:ssxxx zzz" timezone="Asia/Shanghai" :options="{ timeZone: 'Europe/Berlin'  }" />
+
+<TestFormatDate id="text-time-zone-3" date="2004-06-16 00:00:00" format="yyyy-MM-dd HH:mm:ssxxx zzz" timezone="Asia/Shanghai" :options="{ timeZone: 'Asia/Shanghai'  }" />
+
+<TestFormatDate id="text-time-zone-4" date="2004-06-16T00:00:00Z" format="yyyy-MM-dd HH:mm:ssxxx zzz" timezone="Asia/Shanghai" :options="{ timeZone: 'Europe/Berlin'  }" />
+
+<TestFormatDate id="text-time-zone-5" date="2004-06-16 00:00:00" format="yyyy-MM-dd HH:mm:ssxxx zzz" timezone="Asia/Shanghai" :options="{ timeZone: 'Asia/Bangkok'  }" />
+
+<TestFormatDate id="text-time-zone-6" date="2004-06-16 00:00:00" format="yyyy-MM-dd HH:mm:ssxxx zzz" timezone="Europe/Berlin" :options="{ timeZone: 'Asia/Shanghai'  }" />
+
+<TestFormatDate id="text-time-zone-7" date="2004-06-16 00:00:00" format="yyyy-MM-dd HH:mm:ssxxx zzz" timezone="Europe/Berlin" :options="{ timeZone: 'Europe/Berlin'  }" />
+
+<TestFormatDate id="text-time-zone-8" date="2004-06-16T00:00:00Z" format="yyyy-MM-dd HH:mm:ssxxx zzz" timezone="Europe/Berlin" :options="{ timeZone: 'Asia/Shanghai'  }" />

demo/yun/site.config.ts

@@ -7,6 +7,7 @@ export default defineSiteConfig({
 
   lang: 'zh-CN',
   title: 'Valaxy Theme Yun',
+  timezone: 'Asia/Shanghai',
   url: 'https://yun.valaxy.site/',
   author: {
     avatar: 'https://www.yunyoujun.cn/images/avatar.jpg',

docs/pages/faq/index.md

@@ -71,51 +71,3 @@ So you can create a new file named `.nojekyll` in the `public` folder of the pro
 |-- public
 |   |-- .nojekyll
 ```
-
-## 显示的文章创建/修改时间不正确 {lang="zh-CN"}
-
-## The displayed article creation/modification time is incorrect {lang="en"}
-
-::: zh-CN
-根据[这份 `YAML` 规范](https://yaml.org/type/timestamp.html)，符合 `ISO 8601` 标准的时间格式都会被解析为 `Date` 类型，且**不显式标注时区的时间戳都会作 UTC 处理**。
-
-但是为了方便写作与从其他框架迁移，我们将未显式标注时区的时间戳解析为**系统时区**对应的时间（即 `2024-07-06 12:00:00` 在 `Asia/Shanghai` 下会解析 为 `2024-07-06T12:00:00+08:00`）。
-
-无论如何，我们建议**显式**添加时区信息，例如：
-
-```yaml
-date: 2024-07-06 12:00:00 +8
-```
-
-如果你不喜欢显式标记，请**务必**在构建前指定系统时区：
-
-```bash
-sudo timedatectl set-timezone Asia/Shanghai
-```
-
-这样就能正确解析为 UTC+8 时区的 `2024-07-06 12:00:00`。
-
-主题作者也能通过在 `scaffolds/post.md` 中使用 `date: <%=date%> +8` 来实现这一点。
-:::
-
-::: en
-According to [this `YAML` specification](https://yaml.org/type/timestamp.html), time formats that conform to the `ISO 8601` standard will be parsed as `Date` type, and **timestamps without explicitly marked time zones will be treated as UTC**.
-
-However, for the convenience of writing and migrating from other frameworks, we parse timestamps without explicitly marked timezones under system timezone (i.e., `2024-07-06 12:00:00` will be parsed as `2024-07-06T12:00:00+08:00` in `Asia/Shanghai`).
-
-If you don't like explicit marking, **be sure** to specify the system time zone before building:
-
-```bash
-sudo timedatectl set-timezone Asia/Shanghai
-```
-
-Nevertheless, we recommend **explicitly** adding time zone information, for example:
-
-```yaml
-date: 2024-07-06 12:00:00 +8
-```
-
-This way, it can be correctly parsed as `2024-07-06 12:00:00` in the UTC+8 time zone.
-
-Theme authors can also achieve this by using `date: <%=date%> +8` in `scaffolds/post.md`.
-:::

e2e/theme-yun/time.spec.ts

@@ -0,0 +1,30 @@
+import { expect, test } from '@playwright/test'
+import { env } from '../env'
+
+test.use({
+  baseURL: env['theme-yun'],
+})
+
+test.beforeEach(async ({ page }) => {
+  await page.goto('/posts/date')
+})
+
+test.describe('Frontmatter', () => {
+  test('time format validation', async ({ page }) => {
+    await expect(page.locator('#text-time-format-1 time')).toHaveText('20230719')
+    await expect(page.locator('#text-time-format-2 time')).toHaveText('20210301120000')
+    await expect(page.locator('#text-time-format-3 time')).toHaveText('2021/12/03 01:07')
+  })
+
+  test('timezone format validation', async ({ page }) => {
+    await expect(page.locator('#text-time-zone-1 time')).toHaveText('2004-06-15 18:00:00+02:00 GMT+2')
+    await expect(page.locator('#text-time-zone-2 time')).toHaveText('2004-06-15 18:00:00+02:00 GMT+2')
+    await expect(page.locator('#text-time-zone-3 time')).toHaveText('2004-06-16 00:00:00+08:00 GMT+8')
+    await expect(page.locator('#text-time-zone-4 time')).toHaveText('2004-06-16 02:00:00+02:00 GMT+2')
+    await expect(page.locator('#text-time-zone-5 time')).toHaveText('2004-06-15 23:00:00+07:00 GMT+7')
+    await expect(page.locator('#text-time-zone-6 time')).toHaveText('2004-06-16 06:00:00+08:00 GMT+8')
+    await expect(page.locator('#text-time-zone-6 time')).toHaveText('2004-06-16 06:00:00+08:00 GMT+8')
+    await expect(page.locator('#text-time-zone-7 time')).toHaveText('2004-06-16 00:00:00+02:00 GMT+2')
+    await expect(page.locator('#text-time-zone-8 time')).toHaveText('2004-06-16 08:00:00+08:00 GMT+8')
+  })
+})

packages/valaxy-theme-yun/components/YunPostMeta.vue

@@ -1,7 +1,8 @@
 <script lang="ts" setup>
 import type { Post } from 'valaxy'
-import { formatDate, formatTimestamp, useSiteConfig } from 'valaxy'
+import { formatDate, useSiteConfig } from 'valaxy'
 import { useI18n } from 'vue-i18n'
+import { formatTimestamp } from '../utils'
 
 defineProps<{
   // FrontMatter

packages/valaxy-theme-yun/utils/index.ts

@@ -1,3 +1,4 @@
+import { formatDate } from 'valaxy'
 import noneImg from '../assets/images/none.jpg'
 
 /**
@@ -9,3 +10,11 @@ export function onImgError(e: Event, defaultImg = noneImg) {
   targetEl.setAttribute('data-src', targetEl.src)
   targetEl.src = defaultImg
 }
+
+/**
+ * date-fns format date with 'yyyy-MM-dd HH:mm:ss'
+ * @param date
+ */
+export function formatTimestamp(date: string | number | Date): string {
+  return formatDate(date, 'yyyy-MM-dd HH:mm:ss')
+}

packages/valaxy/client/utils/time.ts

@@ -1,21 +1,65 @@
-import { format } from 'date-fns'
+import type { ToDateOptionsWithTZ } from 'date-fns-tz'
+import { format as formatWithTZ, toZonedTime } from 'date-fns-tz'
+import { format, toDate } from 'date-fns'
+import { useSiteConfig } from 'valaxy'
+import { useI18n } from 'vue-i18n'
+import { DateTime } from 'luxon'
 import type { Post } from '../../types'
 
+const referenceDate = new Date(1986, 3 /* Apr */, 4, 10, 32, 0, 900)
+
 /**
- * date-fns format date
- * @param date
- * @param template
+ * format the date
+ * @param date the original date
+ * @param formatStr the string of tokens
+ * @param timezone the time zone of this local time, can be an offset or IANA time zone
+ * @param options the object with options. See [Options]{@link https://date-fns.org/docs/Options}
  */
-export function formatDate(date: string | number | Date, template = 'yyyy-MM-dd') {
-  return format(date, template)
+export function formatDate(date: string | number | Date, formatStr = 'yyyy-MM-dd', timezone?: string, options?: ToDateOptionsWithTZ): string {
+  const { locale } = useI18n()
+  const siteConfig = useSiteConfig()
+
+  const mergedOptions: ToDateOptionsWithTZ = Object.assign({ locale: { code: locale.value } }, options)
+  const clientTimezone = Intl.DateTimeFormat().resolvedOptions().timeZone
+
+  try {
+    /**
+     * Format the timezone-less date to ISO. If none is specified, use the client's timezone.
+     * If the input date is already in ISO format, the timezone won't be applied.
+     */
+    date = handleTimeWithZone(date, timezone || siteConfig.value.timezone || clientTimezone).toString()
+    // Convert to the client's timezone unless the user specifies otherwise
+    const zonedDate = toZonedTime(date, options?.timeZone || clientTimezone, mergedOptions)
+    // The format function will never change the underlying date
+    return formatWithTZ(zonedDate, formatStr, { timeZone: options?.timeZone })
+  }
+  catch (error) {
+    console.error(
+      'The date format provided is non-standard. The recommended format is \'yyyy-MM-dd HH:mm:ss\'',
+      '\nError formatting date:',
+      date.toString(),
+      error,
+    )
+    return format(referenceDate, formatStr)
+  }
 }
 
-/**
- * date-fns format date with 'yyyy-MM-dd HH:mm:ss'
- * @param date
- */
-export function formatTimestamp(date: string | number | Date): string {
-  return format(date, 'yyyy-MM-dd HH:mm:ss')
+function handleTimeWithZone(date: string | number | Date, timezone: string) {
+  if (typeof date !== 'string')
+    date = toDate(date).toISOString()
+
+  let dateTime = DateTime.fromISO(date, { setZone: true })
+
+  const toDateTime = (date: string, zone: string) => {
+    // Attempt to format the date using a function that handles non-ISO 8601 formats
+    const isoDate = format(date, 'yyyy-MM-dd\'T\'HH:mm:ss')
+    return DateTime.fromISO(isoDate, { zone })
+  }
+
+  if (!dateTime.isValid || !dateTime.zoneName)
+    dateTime = toDateTime(date, timezone)
+
+  return dateTime
 }
 
 /**

packages/valaxy/node/config/site.ts

@@ -10,6 +10,7 @@ export const defaultSiteConfig: SiteConfig = {
   url: '/',
   lang: 'en',
   languages: ['en', 'zh-CN'],
+  timezone: '',
   title: 'Valaxy Blog',
   description: 'A blog generated by Valaxy.',
   subtitle: 'Next Generation Static Blog Framework.',

packages/valaxy/node/modules/fuse.ts

@@ -8,7 +8,7 @@ import { cyan, dim } from 'picocolors'
 import type { Argv } from 'yargs'
 
 import type { FuseListItem } from 'valaxy/types'
-import { matterOptions } from '../utils/matterOptions'
+import { matterOptions } from '../plugins/markdown/transform/matter'
 import { resolveOptions } from '../options'
 import { setEnvProd } from '../utils/env'
 import { commonOptions } from '../cli/options'

packages/valaxy/node/modules/rss.ts

@@ -10,7 +10,7 @@ import type { Author, FeedOptions, Item } from 'feed'
 import { Feed } from 'feed'
 import consola from 'consola'
 import { getCreatedTime, getUpdatedTime } from '../utils/date'
-import { matterOptions } from '../utils/matterOptions'
+import { matterOptions } from '../plugins/markdown/transform/matter'
 import { type ResolvedValaxyOptions, resolveOptions } from '../options'
 import { ensurePrefix, isExternal } from '../utils'
 import { commonOptions } from '../cli/options'

packages/valaxy/node/plugins/markdown/transform/index.ts

@@ -2,11 +2,10 @@ import type { Plugin } from 'vite'
 import Markdown from 'unplugin-vue-markdown/vite'
 
 import type MarkdownIt from 'markdown-it'
-import type { PageFrontMatter } from 'valaxy/types'
-import { matterOptions } from '../../../utils/matterOptions'
 import type { ResolvedValaxyOptions } from '../../../options'
 import { highlight } from '../plugins/highlight'
 import { defaultCodeTheme, setupMarkdownPlugins } from '../setup'
+import { matterOptions } from './matter'
 import { createTransformIncludes } from './include'
 import { transformMermaid } from './mermaid'
 
@@ -26,17 +25,6 @@ export async function createMarkdownPlugin(
     frontmatter: true,
     exportFrontmatter: false,
     frontmatterOptions: { grayMatterOptions: matterOptions },
-    frontmatterPreprocess(frontmatter, mdOptions, _, defaultHeadProcess) {
-      const fm = frontmatter as PageFrontMatter
-      if (fm.date)
-        fm.date = new Date(fm.date)
-      if (fm.updated)
-        fm.updated = new Date(fm.updated)
-      return {
-        head: defaultHeadProcess(frontmatter, mdOptions),
-        frontmatter,
-      }
-    },
 
     // v-pre
     escapeCodeTagInterpolation: true,

packages/valaxy/node/plugins/markdown/transform/matter.ts

@@ -0,0 +1,16 @@
+import yaml, { CORE_SCHEMA } from 'js-yaml'
+import type matter from 'gray-matter'
+import { EXCERPT_SEPARATOR } from '../../../constants'
+
+type GrayMatterOptions = matter.GrayMatterOption<string, GrayMatterOptions>
+
+export const matterOptions: GrayMatterOptions = {
+  excerpt_separator: EXCERPT_SEPARATOR,
+  engines: {
+    yaml: {
+      // Use the CORE_SCHEMA with more basic support to manually handle time (#409)
+      parse: (str: string) => yaml.load(str, { schema: CORE_SCHEMA }) as object,
+      stringify: (data: any) => yaml.dump(data),
+    },
+  },
+}

packages/valaxy/node/plugins/vueRouter.ts

@@ -1,15 +1,14 @@
 import VueRouter from 'unplugin-vue-router/vite'
 import fs from 'fs-extra'
 import { resolve } from 'pathe'
-import { isDate } from '@antfu/utils'
 import { convert } from 'html-to-text'
 import type { ExcerptType, Page } from 'valaxy/types'
 import type { RouteMeta } from 'vue-router'
 import MarkdownIt from 'markdown-it'
 import matter from 'gray-matter'
 import type { ValaxyNode } from '../types'
 
-import { matterOptions } from '../utils/matterOptions'
+import { matterOptions } from './markdown/transform/matter'
 import { presetStatistics } from './presets/statistics'
 import { setupMarkdownPlugins } from './markdown'
 
@@ -124,11 +123,6 @@ export async function createRouterPlugin(valaxyApp: ValaxyNode) {
             mdFm.updated = fs.statSync(path).ctime
         }
 
-        if (!isDate(mdFm.date))
-          mdFm.date = new Date(mdFm.date)
-        if (!isDate(mdFm.updated))
-          mdFm.updated = new Date(mdFm.updated!)
-
         if (mdFm.from) {
           if (Array.isArray(mdFm.from)) {
             mdFm.from.forEach((from) => {

packages/valaxy/node/utils/date.ts

@@ -1,5 +1,6 @@
 import fs from 'fs-extra'
 import { getGitTimestamp } from './getGitTimestamp'
+
 /**
  * get created time of file
  * @param file