redirects.js

const getNextConfig = require('../../../../helpers/getNextConfig')
const addDefaultLocaleRedirect = require('../../helpers/addDefaultLocaleRedirect')
const asyncForEach = require('../../helpers/asyncForEach')
const isDynamicRoute = require('../../helpers/isDynamicRoute')

const getPages = require('./pages')

// withoutProps pages
//
// Page params {
//     route -> '/about', '/initial/[id]'
//     filePath -> 'pages/about.html', 'pages/initial[id].html'
// }
//
// Page params in i18n {
//     route -> '/en/about', '/fr/initial/[id]'
//     filePath -> 'pages/en/about.html', 'pages/fr/initial[id].html'
// }
//

const getRedirects = async () => {
  const redirects = []
  const pages = await getPages()
  const { basePath } = await getNextConfig()

  await asyncForEach(pages, async ({ route, filePath }) => {
    const target = filePath.replace(/pages/, '')

    await addDefaultLocaleRedirect(redirects, route, target)

    // For sites that use basePath, manually add necessary redirects here specific
    // only to this page type (which excludes static route redirects by default)
    if (basePath && basePath !== '') {
      redirects.push({
        route: `${basePath}${route}`,
        target: route,
      })
    }

    // Only create normal redirects for pages with dynamic routing
    if (!isDynamicRoute(route)) return

    redirects.push({
      route,
      target: filePath.replace(/pages/, ''),
    })
  })
  return redirects
}

module.exports = getRedirects