pallet_labels.rb

module Fulfillment
  module BulkShipments
    module Types
      include Dry::Types.module
    end

    class PalletLabels < Dry::Struct
      HEADER_PADDING = 20

      constructor_type :strict_with_defaults
      class Address < Dry::Struct
        def self.for(address)
          new(
            name: address.display_name,
            address_1: address.address1,
            city: address.city,
            state: address.state,
            zipcode: address.zipcode,
          )
        end

        def to_s
          <<-ADDRESS
  #{name}
  #{address_1}
  #{city}, #{state}, #{zipcode}
           ADDRESS
        end

        attribute :name, Types::String
        attribute :address_1, Types::String
        attribute :city, Types::String
        attribute :state, Types::String
        attribute :zipcode, Types::String
      end

      def self.for(bulk_shipment:, amount:)
        delivery_window = "#{bulk_shipment
            .ship_by_start.strftime('%B %dth, %Y')} - #{bulk_shipment
            .ship_by_end.strftime('%B %dth, %Y')}"

        purchase_order_number = bulk_shipment.order_number

        new(
          purchase_order_number: purchase_order_number,
          shipping_address: Address.for(bulk_shipment.shipping_address),
          order_placed: bulk_shipment.created_at.strftime("%m/%d/%y"),
          delivery_window: delivery_window,
          total_cartons: amount,
          total_shipment_weight: bulk_shipment.total_weight,
          filename: "bulk_shipment_#{purchase_order_number}_pallet_labels.pdf",
        )
      end

      attribute :purchase_order_number, Types::String
      attribute :order_placed, Types::String
      attribute :delivery_window, Types::String
      attribute :from, Types::String.default("Casper Sleep Inc.")
      attribute :shipping_address, Address
      attribute :total_cartons, Types::Int
      attribute :total_shipment_weight, Types::Int
      attribute :total_shipment_volume, Types::Float.default(0.0)
      attribute :filename, Types::String

      def to_h
        super.except(:filename)
      end

      def to_pdf
        top_header
        order_details
        address_details
        total_details
        pdf_document.render
      end

      private

      def top_header
        pdf_document.stroke_horizontal_rule
        header_padding do
          pdf_document.text "PO# #{purchase_order_number}"
        end
      end

      def order_details
        pdf_document.stroke_horizontal_rule
        header_padding do
          pdf_document.text "Order Pickup: #{order_placed}"
          pdf_document.text "Delivery Window: #{delivery_window}"
        end
        pdf_document.stroke_horizontal_rule
      end

      def address_details
        header_padding do
          pdf_document.text "From: #{from}"
        end
        shipping_address_details
        pdf_document.stroke_horizontal_rule
      end

      def shipping_address_details
        header_padding do
          pdf_document.text "Shipping Address:"
          pdf_document.text shipping_address.to_s
        end
        pdf_document.stroke_horizontal_rule
      end

      def total_details
        header_padding do
          pdf_document.text "Total Cartons: #{total_cartons}"
          pdf_document.text "Total shipment weight: #{total_shipment_weight} pounds"
          pdf_document.text "Total shipment volume: #{total_shipment_volume} cuFt"
        end
      end

      def header_padding
        pdf_document.pad(HEADER_PADDING) { yield }
      end

      def pdf_document
        @pdf_document ||= Prawn::Document.new
      end
    end
  end
end