module Pagy::CountlessExtra

def pagy_countless(collection, vars = {})

Return Pagy object and items 
def pagy_countless(collection, vars = {})
  pagy = Countless.new(pagy_countless_get_vars(collection, vars))
  [pagy, pagy_countless_get_items(collection, pagy)]
end

def pagy_countless_get_items(collection, pagy)

You may need to override this method for collections without offset|limit
Sub-method called only by #pagy_countless: here for easy customization of record-extraction by overriding 
def pagy_countless_get_items(collection, pagy)
  return collection.offset(pagy.offset).limit(pagy.items) if pagy.vars[:countless_minimal]
  fetched = collection.offset(pagy.offset).limit(pagy.items + 1).to_a # eager load items + 1
  pagy.finalize(fetched.size)                                         # finalize the pagy object
  fetched[0, pagy.items]                                              # ignore eventual extra item
end

def pagy_countless_get_vars(_collection, vars)

Sub-method called only by #pagy_countless: here for easy customization of variables by overriding 
def pagy_countless_get_vars(_collection, vars)
  pagy_set_items_from_params(vars) if defined?(ItemsExtra)
  vars[:page] ||= params[vars[:page_param] || DEFAULT[:page_param]]
  vars
end