quangoinc/realtime_qa

module ApplicationHelper
    def avatar_url(user)
    default_url = "#{root_url}images/guest.png"
    gravatar_id = Digest::MD5.hexdigest(user.email.downcase)
    "http://gravatar.com/avatar/#{gravatar_id}.png?s=32"
    end
    def uri?(string)
      uri = URI.parse(string)
      %w( http https ).include?(uri.scheme)
    rescue URI::BadURIError
      false
    rescue URI::InvalidURIError
      false
    end
end