module Pagy::Helpers

def pagy_get_params(params)

Sub-method called only by #pagy_url_for: here for easy customization of params by overriding
def pagy_get_params(params)
  params
end

def pagy_url_for(pagy, page, deprecated_url=nil, absolute: nil)

This works with all Rack-based frameworks (Sinatra, Padrino, Rails, ...)
def pagy_url_for(pagy, page, deprecated_url=nil, absolute: nil)
  absolute = Pagy.deprecated_arg(:url, deprecated_url, :absolute, absolute) if deprecated_url
  pagy, page = Pagy.deprecated_order(pagy, page) if page.is_a?(Pagy)
  p_vars = pagy.vars
  params = request.GET.merge(p_vars[:params])
  params[p_vars[:page_param].to_s]  = page
  params[p_vars[:items_param].to_s] = p_vars[:items] if defined?(UseItemsExtra)
  query_string = "?#{Rack::Utils.build_nested_query(pagy_get_params(params))}" unless params.empty?
  "#{request.base_url if absolute}#{request.path}#{query_string}#{p_vars[:fragment]}"
end