site/src/pages/[...alias].astro

---
import type { AstroInstance, InferGetStaticPropsType } from 'astro'
import RedirectLayout from '@layouts/RedirectLayout.astro'
import { getVersionedDocsPath } from '@libs/path'
import { trimLeadingAndTrailingSlashes } from '@libs/utils'
import { replaceConfigInText } from '@libs/remark'
import { aliasedDocsPages, getDocsPageSlug } from '@libs/content'
import { getAliasedExamplesPages, getExampleNameFromPagePath } from '@libs/examples'

export async function getStaticPaths() {
  function normalizeAliases(aliases: string | string[] | undefined): string[] {
    return aliases ? (Array.isArray(aliases) ? aliases : [aliases]) : []
  }

  function getAliasStaticPath(alias: string, path: string) {
    return { params: { alias: trimLeadingAndTrailingSlashes(replaceConfigInText(alias)) }, props: { path } }
  }

  const staticPaths = []

  const examplesPageModules = import.meta.glob('../assets/examples/**/*.astro', { eager: true })
  const examplesPages = Object.values(examplesPageModules) as AstroInstance[]
  const aliasedExamplesPages = getAliasedExamplesPages(examplesPages)

  // Generate static paths for all examples pages with aliases.
  for (const aliasedExamplesPage of aliasedExamplesPages) {
    const aliases = normalizeAliases(aliasedExamplesPage.aliases)

    for (const alias of aliases) {
      staticPaths.push(getAliasStaticPath(alias, `/examples/${getExampleNameFromPagePath(aliasedExamplesPage.file)}`))
    }
  }

  // Generate static paths for all docs pages with aliases.
  for (const aliasedDocsPage of aliasedDocsPages) {
    const aliases = normalizeAliases(aliasedDocsPage.data.aliases)

    for (const alias of aliases) {
      staticPaths.push(getAliasStaticPath(alias, getDocsPageSlug(aliasedDocsPage.id)))
    }
  }

  return staticPaths.flat()
}

type Props = InferGetStaticPropsType<typeof getStaticPaths>

const { path } = Astro.props
---

<RedirectLayout path={getVersionedDocsPath(path)} />