crosswords.rb

require "date"
require "open-uri"

class Store
  def initialize(base_dir)
    @base_dir = base_dir
  end

  # Super inefficient, but whatever...
  def []=(date, day_data)
    path = date.strftime("#@base_dir/%Y-%m.json")
    month_data = File.exist?(path) ? JSON.parse(File.read(path)) : {}
    month_data[date.to_s] = day_data
    File.write(path, JSON.dump(month_data))
  end

  def last_date
    path = Dir["#@base_dir/*.json"].sort.last
    return nil if path.nil?

    JSON.parse(File.read(path)).keys.map {|k| Date.parse(k) }.sort.last
  end
end

class NYT
  API = "https://nyt-games-prd.appspot.com/svc/crosswords"

  def initialize(nyt_s)
    @nyt_s = nyt_s
    @puzzles = {}
  end

  def fetch(date)
    id = puzzle_id(date)
    url = "#{API}/v6/game/#{id}.json"
    JSON.parse(URI.open(url, "nyt-s" => @nyt_s).read)
  end

  private

  def puzzle_id(date)
    return @puzzles.fetch(date).fetch("puzzle_id") if @puzzles.has_key?(date)

    last_date = @puzzles.keys.sort.last || date - 1
    date_start = last_date + 1
    date_end = date_start >> 3 # 3 months

    url = "#{API}/v3/55348624/puzzles.json?date_start=#{date_start}&date_end=#{date_end}"
    json = JSON.parse(URI.open(url, "nyt-s" => @nyt_s).read)
    results = json.fetch("results")

    @puzzles.merge!(results.map {|result|
      [Date.parse(result.fetch("print_date")), result]
    }.to_h)

    @puzzles.fetch(date).fetch("puzzle_id")
  end
end