module MiGA::RemoteDataset::Download

def database_hash
  universe_hash.dig(:dbs, db)
end

def download(file)
  self.class.download(*download_params(file))
end

def download_headers
  universe_hash[:headers][download_opts]
end

def download_opts(file = nil)
  self.class.download_opts(*download_params(file))
end

def download_params(file = nil)
  [universe, db, ids, database_hash[:format], file, {}, self]
end

def download_payload
  universe_hash[:payload][download_opts]
end

def download_uri
  universe_hash[:uri][download_opts]
end

def universe_hash
  self.class.UNIVERSE[universe]
end