docs: add version select (#532)

docs/composables/useContentSource.ts

@@ -0,0 +1,57 @@
+import type { NavItem, ParsedContent } from '@nuxt/content/dist/runtime/types'
+
+export const useContentSource = () => {
+  const route = useRoute()
+  const config = useRuntimeConfig().public
+
+  const branches = [{
+    name: 'dev',
+    icon: 'i-heroicons-cube',
+    suffix: 'dev',
+    label: 'Edge'
+  }, {
+    name: 'main',
+    icon: 'i-heroicons-cube',
+    suffix: 'latest',
+    label: `v${config.version}`
+  }]
+
+  const branch = computed(() => branches.find(b => b.name === (route.path.startsWith('/dev') ? 'dev' : 'main')))
+
+  const prefix = computed(() => `/${branch.value.name}`)
+
+  function removePrefixFromNavigation (navigation: NavItem[]): NavItem[] {
+    return navigation.map((link) => {
+      const { _path, children, ...rest } = link
+
+      return {
+        ...rest,
+        _path: route.path.startsWith(prefix.value) ? _path : _path.replace(new RegExp(`^${prefix.value}`, 'g'), ''),
+        children: children?.length ? removePrefixFromNavigation(children) : undefined
+      }
+    })
+  }
+
+  function removePrefixFromFiles (files: ParsedContent[]) {
+    return files.map((file) => {
+      if (!file) {
+        return
+      }
+
+      const { _path, ...rest } = file
+
+      return {
+        ...rest,
+        _path: route.path.startsWith(prefix.value) ? _path : _path.replace(new RegExp(`^${prefix.value}`, 'g'), '')
+      }
+    })
+  }
+
+  return {
+    branches,
+    branch,
+    prefix,
+    removePrefixFromNavigation,
+    removePrefixFromFiles
+  }
+}