Class: Opera::MobileStoreSDK::FaradayMiddleware::ResponseParser

Inherits:
Faraday::Middleware
  • Object
show all
Defined in:
lib/opera/mobile_store_sdk/faraday_middleware/response_parser.rb

Overview

Parses the responses to models:

Instance Method Summary collapse

Instance Method Details

#call(request_env) ⇒ Object 



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# File 'lib/opera/mobile_store_sdk/faraday_middleware/response_parser.rb', line 10

def call(request_env)
  # do something with the request
  # request_env[:request_headers].merge!(...)

  @app.call(request_env).on_complete do |response_env|

    benchmark = Benchmark.measure "api_response_parsing" do
      # Parse to XML:
      xml_data = Nokogiri::XML(response_env[:body])

      response_env[:found_rows] = xml_data.xpath("string(/xml/*/@found_rows)").to_i
      response_env[:timestamp] = xml_data.xpath("string(/xml/*/@timestamp)").to_i

      real_root_name = xml_data.xpath("name(/xml/*)")

      parser_class = case real_root_name
      when "platforms"
        Opera::MobileStore::DevicePlatform
      when "platform_families"
        Opera::MobileStore::DevicePlatformFamily
      else
        "Opera::MobileStore::#{real_root_name.classify}".safe_constantize
      end

      # Parse each node:
      collection_path = "/xml/#{real_root_name}"
      collection_path += case real_root_name
      when "compatibility"
        # Add the product id to the compatibility child nodes if
        # a product compatibility was queried instead of a build compat:
        product_param = request_env.url.query[/product_id=(\d+)/i]
        if product_param.present?
          product_id = product_param.split('=').last.to_i
          xml_data.xpath("#{collection_path}/product").each do |product_compat_node|
            product_compat_node.set_attribute('id', product_id)
          end
        end

        # Return an empty string...
        ""
      else
        "/#{real_root_name.singularize}"
      end

      parsed_data = xml_data.xpath(collection_path).map do |item_node|
        parser_class.build_from_nokogiri_node item_node
      end

      # replace body with parsed_data:
      response_env[:body] = parsed_data
    end

    response_env[:opera_api_response_parsing_tms] = benchmark
  end
end