web/server/routers/contentstack/metadata/output.ts

import { z } from "zod"

import { attributesSchema as hotelAttributesSchema } from "../../hotels/schemas/hotel"
import { tempImageVaultAssetSchema } from "../schemas/imageVault"
import { systemSchema } from "../schemas/system"
import { getDescription, getImage, getTitle } from "./utils"

import type { Metadata } from "next"

import { RTETypeEnum } from "@/types/rte/enums"

const metaDataJsonSchema = z.object({
  children: z.array(
    z.object({
      type: z.nativeEnum(RTETypeEnum),
      children: z.array(
        z.object({
          text: z.string().optional(),
        })
      ),
    })
  ),
})

const metaDataBlocksSchema = z
  .array(
    z.object({
      content: z
        .object({
          content: z
            .object({
              json: metaDataJsonSchema,
            })
            .optional()
            .nullable(),
        })
        .optional()
        .nullable(),
    })
  )
  .optional()
  .nullable()

export const rawMetadataSchema = z.object({
  web: z
    .object({
      seo_metadata: z
        .object({
          title: z.string().optional().nullable(),
          description: z.string().optional().nullable(),
          noindex: z.boolean().optional().nullable(),
          seo_image: tempImageVaultAssetSchema.nullable(),
        })
        .optional()
        .nullable(),
      breadcrumbs: z
        .object({
          title: z.string().optional().nullable(),
        })
        .optional()
        .nullable(),
    })
    .optional()
    .nullable(),
  destination_settings: z
    .object({
      city_denmark: z.string().optional().nullable(),
      city_finland: z.string().optional().nullable(),
      city_germany: z.string().optional().nullable(),
      city_poland: z.string().optional().nullable(),
      city_norway: z.string().optional().nullable(),
      city_sweden: z.string().optional().nullable(),
    })
    .optional()
    .nullable(),
  heading: z.string().optional().nullable(),
  preamble: z.string().optional().nullable(),
  header: z
    .object({
      heading: z.string().optional().nullable(),
      preamble: z.string().optional().nullable(),
    })
    .optional()
    .nullable(),
  hero_image: tempImageVaultAssetSchema.nullable(),
  blocks: metaDataBlocksSchema,
  hotel_page_id: z.string().optional().nullable(),
  hotelData: hotelAttributesSchema
    .pick({ name: true, address: true, hotelContent: true, gallery: true })
    .optional()
    .nullable(),
  cityName: z.string().optional().nullable(),
  cityFilter: z.string().optional().nullable(),
  cityFilterType: z.enum(["facility", "surroundings"]).optional().nullable(),
  system: systemSchema,
})

export const metadataSchema = rawMetadataSchema.transform(async (data) => {
  const noIndex = !!data.web?.seo_metadata?.noindex

  const metadata: Metadata = {
    title: await getTitle(data),
    description: getDescription(data),
    openGraph: {
      images: getImage(data),
    },
  }

  if (noIndex) {
    metadata.robots = {
      index: false,
      follow: true,
    }
  }
  return metadata
})