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ndc_ex_sdk

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This is an Elixir package that wrapps any NDC-compliant API. It's host-agnostic and quite flexible-through-configuration so that it can reach NDC hosts with a certain flexibility

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ndc_ex_sdk lib message base.ex
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lib/message/base.ex 

defmodule NDCEx.Message.Base do

  import XmlBuilderPlus

  require Logger

  use Timex



  @acceptable_ndc_methods [

                            AirShopping: ["AirShoppingRQ", "AirShoppingRS"],

                            FlightPrice: ["FlightPriceRQ", "FlightPriceRS"],

                            SeatAvailability: ["SeatAvailabilityRQ", "SeatAvailabilityRS"],

                            ServiceList: ["ServiceListRQ", "ServiceListRS"],

                            ServicePrice: ["ServicePriceRQ", "ServicePriceRS"],



                            OrderCreate: ["OrderCreateRQ", "OrderViewRS"],

                            OrderList: ["OrderListRQ", "OrderListRS"],

                            OrderRetrieve: ["OrderRetrieveRQ", "OrderViewRS"],

                            OrderCancel: ["OrderCancelRQ", "OrderCancelRS"]

                          ]

  @node_names [

                AirShoppingRQ: [:Travelers, :CoreQuery, :Preferences, :Metadata],

                FlightPriceRQ: [:Travelers, :Query, :Metadata, :DataLists],

                SeatAvailability: [:Query, :DataLists],

                OrderCreateRQ: [:Query],

              ]



  def build_document(method, data, config) do

    [ndc_method, response_name] = get_request_data(method)

    xml = build_ndc_body(ndc_method, data, config)

    |> generate_xml(config[:soap][:namespace][method])

    |> add_soap_tags(config[:soap])

    {xml, Time.now}

  end



  defp generate_xml(data, ns) when ns == nil, do: doc(data)

  defp generate_xml(data, ns) when is_bitstring(ns), do: namespace(data, ns)



  defp add_soap_tags(xml, config) when config == nil, do: xml

  defp add_soap_tags(xml, config) do

    ns = config[:request_namespace]

    xml_header = "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"



    attribute = String.replace(config[:attributes][:envelope], "{{namespace}}", ns)

    xml = String.replace(xml, xml_header, "")

    envelope_start = "<#{ns}:Envelope #{attribute}>"

    body_start = "<#{ns}:Body #{ config[:attributes][:body]}>"

    body_end = "</#{ns}:Body>"

    envelope_end = "</#{ns}:Envelope>"

    Enum.join([xml_header, envelope_start, body_start, xml, body_end, envelope_end], "\n")

  end



  def build_url(url, method), do: String.replace(url, "{{NDC-method}}", Atom.to_string(method))

  defp get_request_data(method), do: @acceptable_ndc_methods[method]



  defp build_ndc_body(ndc_method, data, config) do

    ndc = String.to_atom(ndc_method)

    tag_list = [:Document, :Party ] ++ @node_names[ndc]

    elements = [

      Enum.filter(tag_list, fn(tag) -> data[tag] != nil end)

      |> Enum.map( fn(tag) ->

            element(tag, data[tag])

        end)

    ]

    element(String.to_atom(ndc_method), config[:ndc][:attributes], elements)

  end



end