Contents

require "will_paginate"
require "will_paginate-bootstrap"

module Greedo
  class Paginator
    attr_reader :scope, :page, :per_page, :order, :order_by

    def self.build(scope,
                   params: {},
                   page: params.fetch(:page) { 1 }.to_i,
                   per_page: params.fetch(:per_page) { 20 }.to_i,
                   order_by: nil)
      return ArrayPaginator.new(scope, order_by.order, order_by.sort) if scope.is_a?(Array)
      Paginator.new(scope, page: page, per_page: per_page,
                    order: order_by.order, order_by: order_by.sort)
    end

    def initialize(scope, page:, per_page:, order: nil, order_by: nil)
      @scope = scope
      @page = page
      @per_page = per_page
      @order = order
      @order_by = order_by
    end

    def records
      paginated = scope.paginate(page: page, per_page: per_page)
      order_by_fields = [order_by].flatten.map { |field| "#{field} #{order}" }.join(", ")
      order_by ? paginated.reorder(order_by_fields) : paginated
    end

    def show?
      scope.count > per_page
    end
  end

  class ArrayPaginator
    attr_reader :order, :order_by

    def initialize(records, order, order_by)
      @records = records
      @order = order
      @order_by = order_by
    end

    def records
      @sorted_records ||= sort_records
    end

    def show?
      false
    end

    private

    def sort_records
      sorted = order_by ? @records.sort_by { |r| r.send(order_by) } : @records

      order == "desc" ? sorted.reverse : sorted
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
greedo-0.0.4	lib/greedo/paginator.rb
greedo-0.0.3	lib/greedo/paginator.rb