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pagination_options.rb
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pagination_options.rb
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require 'active_model'
require 'mappers/order_by_mapper'
module VCAP::CloudController
class PaginationOptions
include ActiveModel::Model
PAGE_DEFAULT = 1
PER_PAGE_DEFAULT = 50
PER_PAGE_MAX = 5000
ORDER_DEFAULT = 'id'.freeze
DIRECTION_DEFAULT = 'asc'.freeze
VALID_DIRECTIONS = %w[asc desc].freeze
attr_writer :order_by, :order_direction, :default_order_by
attr_accessor :page, :per_page
def initialize(params)
super(params)
@page ||= PAGE_DEFAULT
@per_page ||= PER_PAGE_DEFAULT
end
def self.from_params(params)
page = params[:page].to_i if params[:page].present?
per_page = params[:per_page].to_i if params[:per_page].present?
order_by, order_direction = params[:order_by].present? ? OrderByMapper.from_param(params[:order_by]) : nil
options = { page:, per_page:, order_by:, order_direction: }
PaginationOptions.new(options)
end
def order_by
@order_by || default_order_by
end
def order_direction
@order_direction || DIRECTION_DEFAULT
end
def keys
%i[page per_page order_by order_direction]
end
def ordering_configured?
@order_by.present? || @order_direction.present?
end
private
def default_order_by
@default_order_by || ORDER_DEFAULT
end
end
end