feat: add wishlist

layers/wishlist/server/api/wishlist/books/[id]/cover.post.ts

@@ -0,0 +1,22 @@
+import { z } from 'zod'
+
+const coverSchema = z.object({
+  cover: z.string().regex(OPEN_LIBRARY_COVER, 'Not an Open Library cover')
+})
+
+// Public: anyone can fill in a missing cover, but only with an Open Library cover URL.
+export default defineEventHandler(async (event) => {
+  const id = Number(getRouterParam(event, 'id'))
+  const body = coverSchema.safeParse(await readBody(event))
+  if (!Number.isInteger(id) || !body.success) {
+    throw createError({ statusCode: 400, statusMessage: 'Invalid cover' })
+  }
+
+  const table = wishlistTable(event)
+  const rows = await listRows<WishlistRow>(event, table)
+  const row = rows.find(row => row.id === id)
+  if (!row) throw createError({ statusCode: 404, statusMessage: 'No such book' })
+  if (row.cover) return toWishlistBook(row)
+
+  return toWishlistBook(await updateRow<WishlistRow>(event, table, id, { cover: body.data.cover }))
+})

layers/wishlist/server/api/wishlist/books/index.get.ts

@@ -0,0 +1,4 @@
+export default defineEventHandler(async (event) => {
+  const rows = await listRows<WishlistRow>(event, wishlistTable(event))
+  return rows.map(toWishlistBook).filter(book => book.title)
+})

layers/wishlist/server/utils/wishlist.ts

@@ -0,0 +1,41 @@
+import type { H3Event } from 'h3'
+
+interface LinkValue {
+  value: string
+}
+
+export interface WishlistRow {
+  id: number
+  isbn: string | null
+  thalia: string | null
+  cover?: string | null
+  books: LinkValue[]
+  authors: LinkValue[]
+  title: LinkValue[]
+}
+
+export function wishlistTable(event: H3Event): string {
+  const { baserowWishlistTableId } = useRuntimeConfig(event)
+  if (!baserowWishlistTableId) {
+    throw createError({ statusCode: 500, statusMessage: 'NUXT_BASEROW_WISHLIST_TABLE_ID is not set' })
+  }
+  return baserowWishlistTableId
+}
+
+export const OPEN_LIBRARY_COVER = /^https:\/\/covers\.openlibrary\.org\/b\/id\/\d+-M\.jpg$/
+
+function values(links: LinkValue[] | null | undefined): string[] {
+  return (links ?? []).map(link => link.value?.trim()).filter((value): value is string => !!value)
+}
+
+export function toWishlistBook(row: WishlistRow): WishlistBook {
+  const germanTitle = values(row.title).join(' / ')
+  return {
+    id: row.id,
+    isbn: (row.isbn ?? '').trim(),
+    thalia: row.thalia?.trim() || null,
+    cover: row.cover?.trim() || null,
+    title: germanTitle || values(row.books).join(' / '),
+    authors: [...new Set(values(row.authors))]
+  }
+}