ldx-widgets/src/validation.coffee

widgets

module.exports =

  isAlphabetsOnly: (string) ->
    return /^[a-zA-Z]+$/.test string

  isAlphaNumericOnly: (string) ->
    return /^[a-zA-Z\d]*$/.test string

  isAlphaNumericWithSpaces: (string) ->
    return /^[A-Za-z\d\s]*$/.test string

  isValidTitle: (string) ->
    return /^[a-zA-Z'"!@#$%&*()-_+:;.,?\/0-9\s]+$/.test string

  # Must be positive, no decimals
  isPositiveWholeNumber: (num) ->
    return /^\d+$/.test num

  # Allows decimals and negatives
  isNumeric: (num) ->
    return /^-?[0-9]\d*(\.\d+)?$/.test num
  
  isValidEmail : (addr) ->
    # modified RFC 2822 - http://www.regular-expressions.info/email.html
    return /[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?/i.test addr
  
  isValidName: (name) ->
    # must be for aplhabets, apostrophe, white space or hyphen only
    return /^[a-zA-Z' \-]+$/.test name
  
  isValidPhone: (num) ->
    num = String(num)
    # Allow an empty phone numnber field
    if num.length is 0 then return true
    # Strip out parentheses and hyphens and spaces
    num = num.replace(/[\-\(\)\s]/g, "")
    # Require a ten digit number
    if num.length isnt 10 then return false
    # Check for only numbers
    return @isNumericOnly num

  isValidNhs: (nhs) ->       
    nhsNumber = nhs.replace /\s/g, ''

    # if there are not 10 digits then not valid
    return no if nhsNumber.length < 10
       
    mod11 = 0
    factor = 10
    # for the first 9 digits starting from the left
    for digit in nhsNumber when factor > 1
      # multi the digit by the factor then add to mod 11
      mod11 += digit*factor
      # descrease factor by 1
      factor -= 1

    # get the modulus and the check digit (right most digit)
    modulus = 11 - (mod11 % 11)
    checkDigit = parseInt(nhsNumber[9]) 

    # rules:
    # modulus and check digit are equal then valid
    # modulus is 11 and and check digit is 0 then valid
    # modulus is 10 then not valid
    # everything else not valid
    if modulus is checkDigit or (modulus is 11 and checkDigit is 0)
      return yes
    else 
      return no