Class: KDL::Types::Email::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/kdl/types/email/parser.rb

Instance Method Summary collapse

Constructor Details

#initialize(string, idn: false) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/kdl/types/email/parser.rb', line 7

def initialize(string, idn: false)
  @string = string
  @idn = idn
  @tokenizer = Tokenizer.new(string, idn: idn)
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/kdl/types/email/parser.rb', line 13

def parse
  local = ''
  unicode_domain = nil
  domain = nil
  context = :start

  loop do
    type, value = @tokenizer.next_token

    case type
    when :part
      case context
      when :start, :after_dot
        local += value
        context = :after_part
      else
        raise ArgumentError, "invalid email #{@string} (unexpected part #{value} at #{context})"
      end
    when :dot
      case context
      when :after_part
        local += value
        context = :after_dot
      else
        raise ArgumentError, "invalid email #{@string} (unexpected dot at #{context})"
      end
    when :at
      case context
      when :after_part
        context = :after_at
      end
    when :domain
      case context
      when :after_at
        validator = (@idn ? IDNHostname : Hostname)::Validator.new(value)
        raise ArgumentError, "invalid hostname #{value}" unless validator.valid?

        unicode_domain = validator.unicode
        domain = validator.ascii
        context = :after_domain
      else
        raise ArgumentError, "invalid email #{@string} (unexpected domain at #{context})"
      end
    when :end
      case context
      when :after_domain
        if local.size > 64
          raise ArgumentError, "invalid email #{@string} (local part length #{local.size} exceeds maximaum of 64)"
        end

        return [local, domain, unicode_domain]
      else
        raise ArgumentError, "invalid email #{@string} (unexpected end at #{context})"
      end
    end
  end
end