Class: Coppertone::DomainSpec

Inherits:
MacroString show all
Defined in:
lib/coppertone/domain_spec.rb

Overview

A domain spec, as defined in the SPF specification.

Constant Summary collapse

EXP_ONLY_MACRO_LETTERS = 
%w[c r t].freeze

Instance Attribute Summary

Attributes inherited from MacroString

#macro_text

Instance Method Summary collapse

Methods inherited from MacroString

#==, #context_dependent?, #expand, #hash, #includes_ptr?, #macros, #to_s

Constructor Details

#initialize(s) ⇒ DomainSpec

Returns a new instance of DomainSpec.



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# File 'lib/coppertone/domain_spec.rb', line 7

def initialize(s)
  begin
    super
  rescue Coppertone::MacroStringParsingError
    raise Coppertone::DomainSpecParsingError
  end
  validate_domain_spec_restrictions
end

Instance Method Details

#ends_in_allowed_term? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/coppertone/domain_spec.rb', line 28

def ends_in_allowed_term?
  lm = @macros.last
  return true unless lm
  return false if lm.is_a?(Coppertone::MacroString::MacroStaticExpand)
  return true if lm.is_a?(Coppertone::MacroString::MacroExpand)

  ends_with_top_label?
end

#ends_with_top_label? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/coppertone/domain_spec.rb', line 37

def ends_with_top_label?
  ends_with = @macros.last.to_s
  ends_with = ends_with[0..-2] if ends_with[-1] == '.'
  _, match, tail = ends_with.rpartition('.')
  return false if match.blank?

  hostname = Coppertone::Utils::DomainUtils.valid_tld?(tail)
  return false unless hostname

  true
end

#only_allowed_macros? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/coppertone/domain_spec.rb', line 23

def only_allowed_macros?
  @macros.select { |m| m.is_a?(Coppertone::MacroString::MacroExpand) }
         .none? { |m| EXP_ONLY_MACRO_LETTERS.include?(m.macro_letter) }
end

#validate_domain_spec_restrictions ⇒ Object

Raises:



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# File 'lib/coppertone/domain_spec.rb', line 16

def validate_domain_spec_restrictions
  return if only_allowed_macros? && ends_in_allowed_term?

  raise Coppertone::DomainSpecParsingError
end