Format swiss phone number

example

  # validating samples:
  #      783268674
  #     0783268674
  #  0410783268674
  # 00410783268674
  #  +410783268674
  #  041783268674
  # 0041783268674
  #  +41783268674
  # ++41783268674
  # ++41(0)783268674
  # (0)783268674
  swissPhoneRegex: /^(0041|041|\+41|\+\+41|41)?(0|\(0\))?([1-9]\d{1})(\d{3})(\d{2})(\d{2})$/


  # swissPhoneRegex is setup so we can also use it to format valid phone numbers consistently
  formatPhoneNumber: (phone) ->

    # regex is set up so we can easily format the matching parts
    phone = phone.replace(/[\s()]/g, "")
    res = @swissPhoneRegex.exec(phone)
    if res then "0#{ res[3] } #{ res[4] } #{ res[5] } #{ res[6] }" else ""

I have settled on this for the moment:

const internationalPhoneRegexp = /((\+|00)\d{8,30})/;

// Works for formatted mobile phone numbers like "078 326 86 74"
const swissPhoneRegexp1 = /(0[1-9]{2}\s[0-9]{3}\s[0-9]{2}\s[0-9]{2})/;

// Works for unformatted mobile phone numbers like "0783268674" and
// unformatted landline numbers like "041783268675"
const swissPhoneRegexp2 = /(0[0-9]{9,11})/;

const fullRegexp = new RegExp(
  [
    internationalPhoneRegexp.source,
    swissPhoneRegexp1.source,
    swissPhoneRegexp2.source,
  ].join('|'),
  'g'
);

It's not perfect, and will miss some formatting of phone numbers. However, it's less greedy, works for the formatted numbers that I currently care about and can be used without stripping whitespace.

It works for these test numbers:

• 0783268674
• 078 326 86 74
• 041783268675
• 0041783268674
• +41783268676
• +41783268677