/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

typedef unsigned long abListenerNotifyFlagValue;

/**
  * nsIAbListener
  *
  * Implement this interface to receive notifications of address book
  * items being added, removed or changed with loaded address books.
  *
  * Subscribe to events by using nsIAbManager.
  */
[scriptable, uuid(b3ca8745-2dad-4032-ae2f-0b8622f32697)]
interface nsIAbListener : nsISupports {
  /**
   * These flags are used when registering the listener with nsIAbManager to
   * specify when to receive notifications of address book updates.
   */

  /**
   * An address book, mailing list or card is added.
   */
  const abListenerNotifyFlagValue itemAdded = 0x1;
  /**
   * A mailing list or card is removed from an address book.
   */
  const abListenerNotifyFlagValue directoryItemRemoved = 0x2;
  /**
   * An address book is removed
   */
  const abListenerNotifyFlagValue directoryRemoved = 0x4;
  /**
   * An address book, mailing list or card is changed.
   */
  const abListenerNotifyFlagValue itemChanged = 0x8;
  /**
   * All of the above notifications are to be received.
   */
  const abListenerNotifyFlagValue all = 0xFFFFFFFF;

  /**
   * Called when an address book item (book, card or list) is added
   *
   * @param       parentDir       The parent of the item being added.
   *
   * @param       item            The item being added to the database (a
   *                              directory or card).
   *
   */
  void onItemAdded(in nsISupports parentDir, in nsISupports item);

  /**
   * Called when an address book, mailing list or card is removed. This
   * is partially configurable when setting up the listener via
   * nsIAddrBookSession
   *
   * @param       parentDir       The parent of the item being removed, this
   *                              may be an empty directory in the case of a
   *                              top level address book.
   *
   * @param       item            The item being removed from the database.
   *
   */
  void onItemRemoved(in nsISupports parentDir, in nsISupports item);

  /**
   * Called when an address book item is changed. Note the current
   * implementation means that property is either the literal string "DirName"
   * or null, with oldValue and newValue being specified if the property is
   * "DirName" otherwise they are null.
   *
   * @param       item            The item being updated (a directory or a
   *                              card).
   *
   * @param       property        The property of the item being changed.
   *                              
   * @param       oldValue        The old value of the item property being
   *                              changed if it is known, null otherwise.
   *                              
   * @param       newValue        The new value of the item property being
   *                              changed.
   *                              
   */
  void onItemPropertyChanged(in nsISupports item, in string property, in wstring oldValue, in wstring newValue);
};