Module: Omniboard::Property::PropertyClassMethods

Defined in:
lib/omniboard/property.rb

Instance Method Summary collapse

Instance Method Details

#block_property(p) ⇒ Object

Block properties can also take non-block arguments



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# File 'lib/omniboard/property.rb', line 34

def block_property p
	define_method(p) do |*args, &blck|
		ivar = "@#{p}"
		if blck
			instance_variable_set(ivar, blck)
		elsif args.size == 1
			instance_variable_set(ivar, args.first)
		elsif args.empty?
			instance_variable_get(ivar)
		else
			raise ArgumentError, "wrong number of arguments (#{args.size} for 0,1)"
		end
	end
end

#property(p, allowed_values: nil, munge: nil) ⇒ Object 



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# File 'lib/omniboard/property.rb', line 3

def property p, allowed_values: nil, munge: nil
	define_method(p) do |*args|
		ivar = "@#{p}"
		if args.empty?
			instance_variable_get(ivar)
		elsif args.size == 1
			# Set values!
			new_value = args.first
			if allowed_values && !new_value.nil? && !allowed_values.include?(new_value)
				raise(ArgumentError, "attempted to set property #{p} to forbidden value #{new_value.inspect}")
			else
				if new_value # Only run munge for non-nil values
					case munge
					when Symbol
						new_value = new_value.send(munge)
					when Proc
						new_value = munge[new_value]
					when nil
					else
						raise ArgumentError, "Property munge must be a symbol or a block - you supplied a #{munge.class}."
					end
				end
				instance_variable_set(ivar, new_value)
			end
		else
			raise ArgumentError, "wrong number of arguments (#{args.size} for 0,1)"
		end
	end
end