# Methods added to this helper will be available to all templates in the application.
module ApplicationHelper
  # Evaluate a block, but if the block raises an exception, nil is returned
  # This is useful for evaluating an expression that may have one of
  # it's component equal to nil.
  def n
    begin
      return yield
    rescue Exception
      nil
    end
  end
  
  def datetime(time)
    return nil unless time
    time.strftime '%A %B %d, %Y %I:%M %p'
  end
  
  def chop_url!(url)
    url = url.sub /^http:\/\//, ''
    url = url.sub /\/$/, ''
    url
  end
  
  def uger_version
    '0.6.1'
  end
    
  def normalize_phone(phone)
    t = ' '
    digits = Array.new
    index = 0
    while index < phone.size
      t[0] = phone[index]
      if t =~ /\d/
        digits << t.clone
      end
      index += 1
    end
    
    if digits.size != 10 # We don't know how to deal with extension or international prefix yet.
      return phone
    end
    
    "(#{digits[0]}#{digits[1]}#{digits[2]}) #{digits[3]}#{digits[4]}#{digits[5]}-#{digits[6]}#{digits[7]}#{digits[8]}#{digits[9]}"
  end
end

module InputSanitization
  include ActionView::Helpers::TextHelper
    
  def write_attribute(name, *args)
    if args.first.is_a?(String) &&
        !(@input_sanitization_exceptions || []).include?(name)
      super name, sanitize(args.first)
    else
      super
    end
  end
end