module Pagy::Backend

def self.included(controller) 

def self.included(controller)
  controller.define_method(:params) { {} } unless controller.method_defined?(:params)
end

def pagy(collection, vars = {})

Return Pagy object and paginated items/results 
def pagy(collection, vars = {})
  pagy = Pagy.new(pagy_get_vars(collection, vars))
  [pagy, pagy_get_items(collection, pagy)]
end

def pagy_get_items(collection, pagy)

You may need to override this method for collections without offset|limit
Sub-method called only by #pagy: here for easy customization of record-extraction by overriding 
def pagy_get_items(collection, pagy)
  collection.offset(pagy.offset).limit(pagy.items)
end

def pagy_get_vars(collection, vars)

You may need to override the count call for non AR collections
Sub-method called only by #pagy: here for easy customization of variables by overriding 
def pagy_get_vars(collection, vars)
  pagy_set_items_from_params(vars) if defined?(ItemsExtra)
  vars[:count] ||= (count = collection.count(:all)).is_a?(Hash) ? count.size : count
  vars[:page]  ||= params[vars[:page_param] || DEFAULT[:page_param]]
  vars
end