Docs(locales): add chinese locale support (#2772)

docs/.vitepress/locales/side_bar.ts

@@ -0,0 +1,78 @@
+import directoryTree from 'directory-tree'
+import fs from 'fs'
+import metadataParser from 'markdown-yaml-metadata-parser'
+
+function getMetadataFromDoc(path: string): { sidebarTitle?: string, sidebarOrder?: number } {
+  const fileContents = fs.readFileSync(path, 'utf8')
+
+  return metadataParser(fileContents).metadata
+}
+
+export function generateSidebarChapter(locale:string, chapterDirName: Map<string,string>): any[] {
+  if (chapterDirName.size < 1) {
+    console.error(chapterDirName)
+    throw new Error(`Could not genereate sidebar: chapterDirName is empty`)
+  }
+
+  var chapterPath = ''
+  var sidebar: any[] = []
+
+  for (const chapterDirKey of chapterDirName.keys()) {
+    if (locale !== 'en_US') {
+      chapterPath = `./${locale}/${chapterDirKey}`
+    } else {
+      chapterPath = `./${chapterDirKey}`
+    }
+
+    const tree = directoryTree(chapterPath)
+
+    if (!tree || !tree.children) {
+      console.error(tree)
+      throw new Error(`Could not genereate sidebar: invalid chapter at ${chapterPath}`)
+    }
+
+    let items: { sidebarOrder: number, text: string, link: string }[] = []
+
+    // Look into files in the chapter
+    for (const doc of tree.children) {
+      // make sure it's a .md file
+      if (doc.children || !doc.name.endsWith('.md'))
+        continue
+
+      const { sidebarOrder, sidebarTitle } = getMetadataFromDoc(doc.path)
+
+      if (!sidebarOrder)
+        throw new Error('Cannot find sidebarOrder in doc metadata: ' + doc.path)
+
+      if (!sidebarTitle)
+        throw new Error('Cannot find sidebarTitle in doc metadata: ' + doc.path)
+
+      if (chapterDirKey === 'introduction' && doc.name === '_dummy-index.md') {
+        // Override index page link
+        items.push({
+          sidebarOrder,
+          text: sidebarTitle,
+          link: '/' + (locale === 'en_US' ? '' : locale + '/') 
+        })
+      } else {
+        items.push({
+          sidebarOrder,
+          text: sidebarTitle,
+          link: "/" + doc.path
+        })
+      }
+    }
+
+    items = items.sort((a, b) => a.sidebarOrder - b.sidebarOrder)
+
+    // remove dash and capitalize first character of each word as chapter title
+    const text = chapterDirName.get(chapterDirKey) || chapterDirKey.split('-').join(' ').replace(/\b\w/g, l => l.toUpperCase())
+    sidebar.push({
+      text,
+      collapsed: false,
+      items,
+    })
+  }
+
+  return sidebar
+}