br-phone-validator-lib/src/br-phone-validator.ts

Cell number and fixed phone number validator lib

const tryFormatterPhone = (phone: string): string => {
  let newString: string
  if (phone.length === 11) {
    newString = '(' + phone.substr(0, 2) + ')' + ' ' + phone.substr(2, 5) + '-' + phone.substr(7, phone.length)
  } else {
    newString = '(' + phone.substr(0, 2) + ')' + ' ' + phone.substr(2, 4) + '-' + phone.substr(6, phone.length)
  }
  return newString
}

const PhoneBrValidator = {
  isPhone (phone: string): boolean {
    const exp = /\([1-9]{2}\) (?:[2-8]|9[1-9])[0-9]{3}-[0-9]{4}/g
    let result = exp.test(phone)
    if (!result && (phone.length === 11 || phone.length === 10)) {
      const attemptResult = tryFormatterPhone(phone)
      result = exp.test(attemptResult)
    }
    return result
  }
}

export default PhoneBrValidator