Module: SingleWriteAccessors::ClassMethods

Defined in:
lib/gmail-britta.rb

Instance Method Summary collapse

Instance Method Details

#ivar_name(name) ⇒ Object 



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# File 'lib/gmail-britta.rb', line 18

def ivar_name(name)
  "@#{name}".intern
end

#single_write_accessor(name, gmail_name, &block) ⇒ Object 



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# File 'lib/gmail-britta.rb', line 26

def single_write_accessor(name, gmail_name, &block)
  single_write_accessors[name] = gmail_name
  ivar_name = self.ivar_name(name)
  define_method(name) do |words|
    if instance_variable_get(ivar_name)
      raise "Only one use of #{name} is permitted per filter"
    end
    instance_variable_set(ivar_name, words)
  end
  define_method("get_#{name}") do
    instance_variable_get(ivar_name)
  end
  if block_given?
    define_method("output_#{name}") do
      instance_variable_get(ivar_name) && block.call(instance_variable_get(ivar_name))
    end
  else
    define_method("output_#{name}") do
      instance_variable_get(ivar_name)
    end
  end
end

#single_write_accessors ⇒ Object 



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# File 'lib/gmail-britta.rb', line 22

def single_write_accessors
  @single_write_accessors ||= {}
end

#single_write_boolean_accessor(name, gmail_name) ⇒ Object 



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# File 'lib/gmail-britta.rb', line 49

def single_write_boolean_accessor(name, gmail_name)
  single_write_accessors[name] = gmail_name
  ivar_name = self.ivar_name(name)
  define_method(name) do |*args|
    value = args.length > 0 ? args[0] : true
    if instance_variable_get(ivar_name)
      raise "Only one use of #{name} is permitted per filter"
    end
    instance_variable_set(ivar_name, value)
  end
  define_method("get_#{name}") do
    instance_variable_get(ivar_name)
  end
  define_method("output_#{name}") do
    instance_variable_get(ivar_name)
  end
end