class IsoCountryCodes # :nodoc: class UnknownCodeError < StandardError; end class << self def for_select(*args) Code.for_select(*args) end def all Code.all end DEFAULT_FALLBACK = lambda { |error| raise UnknownCodeError, error } def find(code, &fallback) fallback ||= DEFAULT_FALLBACK code = code.to_s.upcase instance = nil if code.match(/^\d{2}$/) code = "0#{code}" # Make numeric codes three digits end if code.match(/^\d{3}$/) instance = all.find { |c| c.numeric == code } elsif code.match(/^[A-Z]{2}$/) instance = all.find { |c| c.alpha2 == code } elsif code.match(/^[A-Z]{3}$/) instance = all.find { |c| c.alpha3 == code } end return fallback.call "No ISO 3166-1 code could be found for '#{code}'." if instance.nil? instance end def search_by_name(str, &fallback) fallback ||= DEFAULT_FALLBACK instances = all.select { |c| c.name.to_s.upcase == str.to_s.upcase } instances = all.select { |c| c.name.to_s.match(/^#{Regexp.escape(str)}/i) } if instances.empty? instances = all.select { |c| c.name.to_s.match(/#{Regexp.escape(str)}/i) } if instances.empty? instances = all.select { |c| word_set(c.name) == word_set(str) } if instances.empty? return fallback.call "No ISO 3166-1 codes could be found searching with name '#{str}'." if instances.empty? instances end def search_by_calling_code(code, &fallback) fallback ||= DEFAULT_FALLBACK code = "+#{code.to_i}" # Normalize code instances = all.select { |c| c.calling == code } return fallback.call "No ISO 3166-1 codes could be found searching with calling code '#{code}'." if instances.empty? instances end def search_by_calling(code, &fallback) # Alias of search_by_calling_code search_by_calling_code code, &fallback end def search_by_currency(code, &fallback) fallback ||= DEFAULT_FALLBACK code = code.to_s.upcase instances = all.select { |c| c.currencies.select { |currency| currency != code }.empty? } return fallback.call "No ISO 3166-1 codes could be found searching with currency '#{code}'." if instances.empty? instances end def search_by_iban(code, &fallback) fallback ||= DEFAULT_FALLBACK code = code.to_s.upcase instances = all.select { |c| c.iban == code } return fallback.call "No ISO 3166-1 codes could be found searching with IBAN '#{code}'." if instances.empty? instances end private def word_set(str) str.to_s.upcase.split(/\W/).reject(&:empty?).to_set end end end