wrapper_for_kaminari.rb

class WrapperForKaminari
  attr_reader :total_count, :per, :page
  delegate_missing_to :@models

  def initialize(models:, total_count:, per:, page:)
    @models = models
    @total_count = total_count
    @per = per
    @page = page
  end

  def total_pages
    (total_count / per) + 1
  end

  def current_page
    page
  end

  def last_page?
    current_page == total_pages
  end

  def out_of_range?
    current_page > total_pages
  end

  def limit_value
    per
  end

  def next_page
    current_page + 1 unless last_page? || out_of_range?
  end

  def prev_page
    current_page - 1 unless first_page? || out_of_range?
  end
end