module HTTPX::Plugins::ResponseCache

def cacheable_request?(request)
  CACHEABLE_VERBS.include?(request.verb) &&
    (
      !request.headers.key?("cache-control") || !request.headers.get("cache-control").include?("no-store")
    )
end

def cacheable_response?(response)
  response.is_a?(Response) &&
    (
      response.cache_control.nil? ||
      # TODO: !response.cache_control.include?("private") && is shared cache
      !response.cache_control.include?("no-store")
    ) &&
    CACHEABLE_STATUS_CODES.include?(response.status) &&
    # RFC 2616 13.4 - A response received with a status code of 200, 203, 206, 300, 301 or
    # 410 MAY be stored by a cache and used in reply to a subsequent
    # request, subject to the expiration mechanism, unless a cache-control
    # directive prohibits caching. However, a cache that does not support
    # the Range and Content-Range headers MUST NOT cache 206 (Partial
    # Content) responses.
    response.status != 206 && (
    response.headers.key?("etag") || response.headers.key?("last-modified-at") || response.fresh?
  )
end

def cached_response?(response)
  response.is_a?(Response) && response.status == 304
end

def extra_options(options)
  options.merge(response_cache_store: Store.new)
end

def load_dependencies(*)
  require_relative "response_cache/store"
end