module BookshelfTemplate

import "pkl:json"

typealias Author = String | Listing<String>
typealias Format = "Hardcover" | "Paperback"
typealias Categories = Listing<String>

class Book {
  isbn: String
  title: String
  author: Author
  afterword: String?
  publisher: String
  published: UInt16
  subTitle: String?
  imprint: String?
  series: String?
  seriesNumber: UInt8?
  subSeries: String?
  subSeriesNumber: UInt8?
  yearReadOn: UInt16?
  pages: UInt16?
  edition: String?
  format: Format?
  categories: Categories?
  genre: String?
}

books: Listing<Book>

output {
  renderer = new JsonRenderer {
    omitNullProperties = true
  }
}