# https://github.com/r888888888/danbooru/issues/4144
#
# API requests must send a user agent and must use gzip compression, otherwise
# 403 errors will be returned.

class DeviantArtApiClient < Struct.new(:deviation_id)
  extend Memoist

  def extended_fetch
    params = { deviationid: deviation_id, type: "art", include_session: false }
    http.get("https://www.deviantart.com/_napi/da-deviation/shared_api/deviation/extended_fetch", params: params)
  end

  def extended_fetch_json
    JSON.parse(extended_fetch.body).with_indifferent_access
  end

  def download_url
    url = extended_fetch_json.dig(:deviation, :extended, :download, :url)
    response = http.cookies(extended_fetch.cookies).get(url)
    response.headers[:location]
  end

  def http
    HTTP.use(:auto_inflate).headers(Danbooru.config.http_headers.merge("Accept-Encoding" => "gzip"))
  end

  memoize :extended_fetch, :extended_fetch_json, :download_url
end