nextjs-notion-starter-kit/lib/get-all-pages.ts

import pMemoize from 'p-memoize'
import { getAllPagesInSpace } from 'notion-utils'

import * as types from './types'
import { includeNotionIdInUrls } from './config'
import { notion } from './notion-api'
import { getCanonicalPageId } from './get-canonical-page-id'

const uuid = !!includeNotionIdInUrls

export const getAllPages = pMemoize(getAllPagesImpl, {
  cacheKey: (...args) => JSON.stringify(args)
})

export async function getAllPagesImpl(
  rootNotionPageId: string,
  rootNotionSpaceId: string
): Promise<Partial<types.SiteMap>> {
  const pageMap = await getAllPagesInSpace(
    rootNotionPageId,
    rootNotionSpaceId,
    notion.getPage.bind(notion)
  )

  const canonicalPageMap = Object.keys(pageMap).reduce(
    (map, pageId: string) => {
      const recordMap = pageMap[pageId]
      if (!recordMap) {
        throw new Error(`Error loading page "${pageId}"`)
      }

      const canonicalPageId = getCanonicalPageId(pageId, recordMap, {
        uuid
      })

      if (map[canonicalPageId]) {
        // you can have multiple pages in different collections that have the same id
        // TODO: we may want to error if neither entry is a collection page
        console.warn('error duplicate canonical page id', {
          canonicalPageId,
          pageId,
          existingPageId: map[canonicalPageId]
        })

        return map
      } else {
        return {
          ...map,
          [canonicalPageId]: pageId
        }
      }
    },
    {}
  )

  return {
    pageMap,
    canonicalPageMap
  }
}