Contents

require 'savon'

module PeriodicTable
  class PeriodicTableApi
    def initialize
      @client = Savon::Client.new do
        wsdl.document = 'http://www.webservicex.net/periodictable.asmx?WSDL'
      end
    end

    def query(element_name)
      api_response = @client.request :get_atomic_number do
        soap.body = {'ElementName' => element_name}
      end
      result = api_response.to_hash[:get_atomic_number_response][:get_atomic_number_result]
      ApiResponse.new(result)
    end
  end

  # Wow, this is ugly. I did not expect nested XML.
  class ApiResponse
    attr_reader :atomic_weight,
                :symbol,
                :atomic_number,
                :element_name,
                :boiling_point,
                :ionisation_potential,
                :electro_negativity,
                :atomic_radius,
                :melting_point,
                :density

    def initialize(result)
      xml = Nokogiri::XML.parse(result)
      @atomic_weight = xml.at('AtomicWeight').text
      @symbol = xml.at('Symbol').text
      @atomic_number = xml.at('AtomicNumber').text
      @element_name = xml.at('ElementName').text
      @boiling_point = xml.at('BoilingPoint').text
      @ionisation_potential = xml.at('IonisationPotential').text
      @electro_negativity = xml.at('EletroNegativity').text
      @atomic_radius = xml.at('AtomicRadius').text
      @melting_point = xml.at('MeltingPoint').text
      @density = xml.at('Density').text
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
periodic_table-0.0.2	lib/periodic_table/periodic_table_api.rb
periodic_table-0.0.1	lib/periodic_table/periodic_table_api.rb