Synnefo » snf-ganeti

  "ConfirmOperation",

def ConfirmOperation(names, list_type, text, extra=""):

  """Ask the user to confirm an operation on a list of list_type.

  This function is used to request confirmation for doing an operation

  on a given list of list_type.

  @type names: list

  @param names: the list of names that we display when

      we ask for confirmation

  @type list_type: str

  @param list_type: Human readable name for elements in the list (e.g. nodes)

  @type text: str

  @param text: the operation that the user should confirm

  @rtype: boolean

  @return: True or False depending on user's confirmation.

  """

  count = len(names)

  msg = ("The %s will operate on %d %s.\n%s"

         "Do you want to continue?" % (text, count, list_type, extra))

  affected = (("\nAffected %s:\n" % list_type) +

              "\n".join(["  %s" % name for name in names]))

  choices = [("y", True, "Yes, execute the %s" % text),

             ("n", False, "No, abort the %s" % text)]

  if count > 20:

    choices.insert(1, ("v", "v", "View the list of affected %s" % list_type))

    question = msg

  else:

    question = msg + affected

  choice = AskUser(question, choices)

  if choice == "v":

    choices.pop(1)

    choice = AskUser(msg + affected, choices)

  return choice