Phone

gistfile1.txt

class Phone

	def initialize(number)
		@number = number
	end

	def number

		# strip all chars except numbers
		number = @number.gsub(/[^0-9]/i, '')

		# If the phone number is less than 10 digits assume that it is bad number
		if number.length < 10
			return nil
		end

		# If the phone number is 10 digits assume that it is good
		if number.length == 10
			return number
		end

		# If the phone number is more than 11 digits assume that it is a bad number
		if number.length > 11
			return nil
		end

		# If the phone number is 11 digits and the first number is 1, trim the 1 and use the first 10 digits
		if number.length == 11 && number[0] == '1'
			return number[1..10]
		end

		# If the phone number is 11 digits and the first number is not 1, then it is a bad number
		if number.length == 11 && number[0] != '1'
			return nil
		end

		return number

	end

	# returns the first 3 digits of a number
	def area_code
		number = number()
		return number[0..2]
	end

	# pretty print a misc. phone number
	def pretty_print
		number = number()
		return '(' + number[0..2] + ') ' + number[3..5] + '-' + number[6..9]
	end

end