Contents

# frozen_string_literal: true

module MrCommon
  # Wrapper doing common tasks with the Carmen gem
  class Country
    class << self
      # @param top [Array<String>] a list of country codes that should be
      #   promoted to the top of the list.
      # @return [Array<Array<String, String>>] an array of label-value pairs for
      #   building country select options.
      def all(top = [])
        all_countries = label_value_pairs.dup

        top.reverse_each do |alpha2|
          all_countries = promote_one(all_countries, alpha2)
        end

        all_countries
      end

      # @return [Array<String>] two letter country codes in alphabetical order
      def codes
        Carmen::Country.all.map(&:code).sort
      end

      # @return [Array<String>] country names in alphabetical order
      def names
        Carmen::Country.all.map(&:name).sort
      end

      # @param code [String] a two letter country code
      # @return [String] the name of the country for that code
      def name_for(code)
        Carmen::Country.alpha_2_coded(code).name
      end

      private

        def promote_one(collection, promoted_alpha2)
          if found_index = alpha_2_index(collection, promoted_alpha2)
            collection.unshift(collection.delete_at(found_index))
          else
            collection
          end
        end

        def alpha_2_index(collection, alpha_2)
          collection.find_index do |name_code_pair|
            name_code_pair.second == alpha_2.to_s.upcase
          end
        end

        def label_value_pairs
          @label_value_pairs ||= Carmen::Country.all.sort_by(&:name).map do |c|
            [c.name, c.code]
          end
        end
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
mr_common-2.1.0	app/models/mr_common/country.rb
mr_common-2.0.0	app/models/mr_common/country.rb