module ActiveSupport::NumberHelper

# => +1.123.555.1234 x 1343
number_to_phone(1235551234, country_code: 1, extension: 1343, delimiter: '.')

number_to_phone('123a456') # => 123a456
number_to_phone(1235551234, country_code: 1) # => +1-123-555-1234
number_to_phone(1235551234, area_code: true, extension: 555) # => (123) 555-1234 x 555
number_to_phone(1235551234, delimiter: ' ') # => 123 555 1234
number_to_phone(1235551234, area_code: true) # => (123) 555-1234
number_to_phone(1235551234) # => 123-555-1234
number_to_phone('5551234') # => 555-1234
number_to_phone(5551234) # => 555-1234

==== Examples
number.
* :country_code - Sets the country code for the phone
end of the generated number.
* :extension - Specifies an extension to add to the
(defaults to "-").
* :delimiter - Specifies the delimiter to use
* :area_code - Adds parentheses around the area code.

==== Options

123-9876). You can customize the format in the +options+ hash.
Formats a +number+ into a US phone number (e.g., (555)

def number_to_phone(number, options = {})
  return unless number
  options = options.symbolize_keys
  number       = number.to_s.strip
  area_code    = options[:area_code]
  delimiter    = options[:delimiter] || "-"
  extension    = options[:extension]
  country_code = options[:country_code]
  if area_code
    number.gsub!(/(\d{1,3})(\d{3})(\d{4}$)/,"(\\1) \\2#{delimiter}\\3")
  else
    number.gsub!(/(\d{0,3})(\d{3})(\d{4})$/,"\\1#{delimiter}\\2#{delimiter}\\3")
    number.slice!(0, 1) if number.start_with?(delimiter) && !delimiter.blank?
  end
  str = ''
  str << "+#{country_code}#{delimiter}" unless country_code.blank?
  str << number
  str << " x #{extension}" unless extension.blank?
  str
end