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# File 'lib/with_attributes.rb', line 4
def with_attribute(*attrs, default: true)
raise ArgumentError, "invalid with_attribute default option" unless [true, false].include?(default)
attrs.each do |attr|
raise NameError, "invalid with_attribute name: #{attr}" unless /^[_A-Za-z]\w*$/.match?(attr)
class_eval(<<~CODE, __FILE__, __LINE__ + 1)
def self.#{attr}?
value = Thread.current["with_attribute_#{attr}_\#{object_id}"]
if value.nil?
if superclass.respond_to?(:#{attr}?)
superclass.#{attr}?
else
#{default}
end
else
value
end
end
def self.with_#{attr}
current = Thread.current["with_attribute_#{attr}_\#{object_id}"]
enable_#{attr}
yield if block_given?
ensure
Thread.current["with_attribute_#{attr}_\#{object_id}"] = current
end
def self.without_#{attr}
current = Thread.current["with_attribute_#{attr}_\#{object_id}"]
disable_#{attr}
yield if block_given?
ensure
Thread.current["with_attribute_#{attr}_\#{object_id}"] = current
end
def self.enable_#{attr}
Thread.current["with_attribute_#{attr}_\#{object_id}"] = true
end
def self.disable_#{attr}
Thread.current["with_attribute_#{attr}_\#{object_id}"] = false
end
def #{attr}?
@#{attr}.nil? ? self.class.#{attr}? : @#{attr}
end
def with_#{attr}
current = @#{attr}
enable_#{attr}
yield if block_given?
ensure
@#{attr} = current
end
def without_#{attr}
current = @#{attr}
disable_#{attr}
yield if block_given?
ensure
@#{attr} = current
end
def enable_#{attr}
@#{attr} = true
end
def disable_#{attr}
@#{attr} = false
end
CODE
end
end
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