Paginable

paginable.rb

# frozen_string_literal: true

module Paginable
  extend ActiveSupport::Concern

  DEFAULT_PAGE_SIZE = 20

  def paginate(records)
    records.limit(page_size).offset(page_offset)
  end

  def records_count(records)
    records.unscope(:limit).unscope(:offset).unscope(:select).count
  end

  private

  def page_offset
    (page_number - 1) * page_size
  end

  def page_number
    page_params.dig(:page, :number)&.to_i || 1
  end

  def page_size
    page_params.dig(:page, :size)&.to_i || DEFAULT_PAGE_SIZE
  end

  def page_params
    params.permit(page: %i[number size])
  end
end