mad-raz/EGP-Rates

# frozen_string_literal: true
Add an empty line after magic comments.
module EGPRates
  # Central Bank of Egypt
  class CBE < EGPRates::Bank
    def initialize
      @sym = :CBE
      @uri = URI.parse('http://www.cbe.org.eg/en/EconomicResearch/Statistics/Pages/ExchangeRatesListing.aspx')
    end
 
    # @return [Hash] of exchange rates for selling and buying
    #   {
    #     { sell: { SYM: rate }, { SYM: rate }, ... },
    #     { buy:  { SYM: rate }, { SYM: rate }, ... }
    #   }
    def exchange_rates
      @exchange_rates ||= parse(raw_exchange_rates)
    end
 
    private
 
    # Send the request to the URL and retrun raw data of the response
    # @return [Enumerator::Lazy] with the table row in HTML that evaluates to
    #   [
    #     "US Dollar \r\n  ", "15.7297", "16.3929",
    #     "Euro \r\n,      ", "17.5308", "18.1938",
    #     ...
    #   ]
    #
    def raw_exchange_rates
      table_rows = Oga.parse_html(response.body).css('tbody').last&.children
      # CBE porvide 9 currencies on the home page
      fail ResponseError, 'Unknown HTML' unless table_rows&.size == 9
      table_rows.lazy.map(&:children).map { |cell| cell.map(&:text) }
    end
  end
end