/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Extension Manager.
 *
 * The Initial Developer of the Original Code is Ben Goodger.
 * Portions created by the Initial Developer are Copyright (C) 2004
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Ben Goodger <ben@mozilla.org> (Google Inc.)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */


#include "nsISupports.idl"

interface nsIFile;
interface nsIRDFDataSource;
interface nsIUpdateItem;
interface nsIAddonUpdateListener;
interface nsIAddonUpdateCheckListener;
interface nsICommandLine;
interface nsISimpleEnumerator;
interface nsIDirectoryEnumerator;

/**
 * Interface representing a location where extensions, themes etc are 
 * installed.
 */
[scriptable, uuid(D3D4DADA-C6EB-11D9-A68F-001124787B2E)]
interface nsIInstallLocation : nsISupports
{
  /**
   * The string identifier of this Install Location
   */
  readonly attribute AString name;
  
  /**
   * An enumeration of nsIFiles for:
   * - locations that contain items
   * - potential dropped-in XPIs
   * Note: This enumeration resolves Text Links to the directories they
   *       refer to.
   */
  readonly attribute nsIDirectoryEnumerator itemLocations;

  /**
   * The file system location where items live. Items can be dropped in
   * at this location. Can be null for Install Locations that don't have
   * a file system presence. 
   * Note: This is a clone of the actual location which the caller can 
   *       modify freely.
   */
  readonly attribute nsIFile location;

  /**
   * Whether or not this Install Location is on an area of the file system
   * that could be restricted on a restricted-access account, regardless
   * of whether or not the location is restricted with the current user
   * privileges. 
   */
  readonly attribute boolean restricted;

  /**
   * Whether or not the user can write to the Install Location with the
   * current access privileges. This is different from restricted because
   * it's not whether or not the location *might* be restricted, it's 
   * whether or not it actually *is* restricted right now.
   */
  readonly attribute boolean canAccess;

  /**
   * Constants representing priority of some default Install Locations.
   * XXXben - priority ranking of user-level items vs. global-level items
   *          here is debatable. Should app-system-global trump 
   *          xre-system-user?
   * You should not use the exact values here, you should offset from
   * these values each time you create a new Install Location. Offsetting
   * can be brittle but you should know what Install Locations are being
   * defined for your own application.
   */
  const unsigned long PRIORITY_APP_PROFILE        = 0;
  const unsigned long PRIORITY_APP_SYSTEM_USER    = 10;
  const unsigned long PRIORITY_XRE_SYSTEM_USER    = 100;
  const unsigned long PRIORITY_APP_SYSTEM_GLOBAL  = 1000;
  const unsigned long PRIORITY_XRE_SYSTEM_GLOBAL  = 10000;
    
  /**
   * The priority level of this Install Location in loading. 
   */
  readonly attribute long priority;
  
  /**
   * Gets the directory that contains an item.
   * @param   id
   *          The GUID of the item.
   * @returns The location of the item. 
   */
  nsIFile getItemLocation(in AString id);

  /**
   * Retrieves the GUID for an item at the specified location.
   * @param   file
   *          The location where an item might live.
   * @returns The ID for an item that might live at the location specified.
   *
   * N.B. This function makes no promises about whether or not this path is
   *      actually maintained by this Install Location.
   */
  AString getIDForLocation(in nsIFile file);

  /**
   * Gets a nsIFile object for a file within an item's directory structure.
   * @param   id
   *          The GUID of the item.
   * @param   path
   *          The path to the file beneath an Extension's directory
   * @returns A file object at the requested location. The file does not
   *          necessarily have to exist.
   */
  nsIFile getItemFile(in AString id, in AString path);

  /**
   * Determines whether or not an item's resources are managed by the Extension
   * System or by some other user or process. For example, items linked to by
   * text links are managed by the user, and items linked to from Registry
   * Install Locations are usually managed by other applications or installers.
   *
   * @param   id
   *          The GUID of the item.
   * @returns true if the item's resources are managed independently of the
   *          Extension System, false otherwise.
   */
  boolean itemIsManagedIndependently(in AString id);
};

/**
 * Interface representing a system for the installation and management of
 * Extensions, Themes etc. 
 *
 * XXXben - Some of this stuff should go into a management-ey interface, 
 *          some into an app-startup-ey interface.
 */
[scriptable, uuid(2c981b79-6873-41da-8341-7cda018b6e18)]
interface nsIExtensionManager : nsISupports
{
  /**
   * Starts the Extension Manager, checking for item changes, additions and
   * removals, and finishing pending operations.
   * @param   commandLine
   *          The command line the application was started with.
   * @returns true if the application has rewritten the extensions.ini file
   *          and needs to restart to register components/chrome etc, 
   *          false otherwise
   */
  boolean start(in nsICommandLine commandLine);

  /** 
   * Determines if there are incompatible items installed (and offers to
   * upgrade them to newer versions if available, via a UI). 
   * @returns true if there were incompatible items that were disabled
   *          and the application needs to restart to re-register components,
   *          chrome etc, false otherwise.
   */
  boolean checkForMismatches();

  /**
   * Handle command line flags, e.g. -install-global-[extension|theme]
   * @param   cmdLine
   *          the command line the application was started with
   * XXXben - move this off this API - currently it is only used for 
   *          global installation, and the apprunner can do this directly
   *          with |installItemFromFile|
   */
  void handleCommandLineArgs(in nsICommandLine cmdline);

  /**
   * Gets the Install Location for an item
   * @param   id
   *          The GUID of the item
   * @returns The Install Location where the item is installed.
   */
  nsIInstallLocation getInstallLocation(in AString id);

  /**
   * An enumeration of all registered Install Items
   */
  readonly attribute nsISimpleEnumerator installLocations;

  /**
   * Installs an item from a XPI/JAR file into the location specified. 
   * @param   xpiFile
   *          The source file to install from. This function stages a copy
   *          of this file for persistence across potential application 
   *          restarts, you are responsible for removing the file you pass
   *          in. 
   * @param   installLocationKey
   *          The name identifier of an Install Location to install into.
   */
  void installItemFromFile(in nsIFile xpiFile, in AString installLocationKey);

  /**
   * Uninstalls an item
   * @param   id
   *          The GUID of the item.
   */
  void uninstallItem(in AString id);

  /**
   * Enables a disabled item
   * @param   id
   *          The GUID of the item.
   */
  void enableItem(in AString id);

  /**
   * Disables an enabled item
   * @param   id
   *          The GUID of the item.
   */
  void disableItem(in AString id);

  /**
   * Checks for updates to a list of items.
   * @param   items
   *          An array of nsIUpdateItems to check for updates for.
   * @param   itemCount
   *          The length of |items|
   * @param   versionUpdateOnly
   *          false if this check should find the newest versions available,
   *          true if it should only find newer target application compatibility
   *          information for the currently installed version.
   * @param   listener
   *          An nsIAddonUpdateCheckListener object which will be notified during
   *          the update check process. 
   */
   void update([array, size_is(itemCount)] in nsIUpdateItem items,
               in unsigned long itemCount, 
               in unsigned long versionUpdateOnly,
               in nsIAddonUpdateCheckListener listener);

  /**
   * Gets a nsIUpdateItem for the item with the specified id.
   * @param   id
   *          The GUID of the item to construct a nsIUpdateItem for.
   * @returns The nsIUpdateItem representing the item.
   */
  nsIUpdateItem getItemForID(in AString id);

  /**
   * Retrieves a list of visible nsIUpdateItems of items matching the 
   * specified type.
   * @param   type
   *          The type of item to return.
   * @param   countRef
   *          The XPCJS reference to the number of items returned.
   * @returns An array of nsIUpdateItems matching the id/type filter.
   *
   * XXXben - it would be good if this function took an optional 
   *          install location.
   */
  void getItemList(in unsigned long type, out unsigned long itemCount,
                   [retval, array, size_is(itemCount)] out nsIUpdateItem items);

  /*
   * Retrieves a list of nsIUpdateItems of items matching the specified type
   * that can be updated.
   * @param   type
   *          The type of item to return.
   * @param   countRef
   *          The XPCJS reference to the number of items returned.
   * @returns An array of nsIUpdateItems matching the type filter that can be
   *          updated based on if the item is not appManaged, does not have
   *          a pending install, upgrade, or uninstall operation, the item's
   *          update.enabled pref is not set to false, and the item's location
   *          is writeable.
   */
  void getUpdateableItemList(in unsigned long type,
                             out unsigned long itemCount,
                             [retval, array, size_is(itemCount)] out nsIUpdateItem items);

  /**
   * Retrieves a list of nsIUpdateItems of items that are incompatible
   * with the supplied parameters.
   * @param   id
   *          The id of the application to check compatibility against
   * @param   version
   *          The version of the application to check compatibility against
   * @param   type
   *          The type of item to return
   * @param   includeDisabled
   *          true if disabled items should be included in the result set, 
   *          false otherwise
   * @param   countRef
   *          The XPCJS reference to the number of items returned.
   * @returns An array of incompatible nsIUpdateItems.
   */
  void getIncompatibleItemList(in AString id, 
                               in AString version,
                               in unsigned long type,
                               in boolean includeDisabled,
                               out unsigned long itemCount,
                               [retval, array, size_is(itemCount)] out nsIUpdateItem items);

  /**
   * The Extensions Datasource
   * XXXben - the datasource should be registered with the RDF system, so it 
   *          can be accessed via rdf:extensions, and not exposed through the API
   *          like this.
   */
  readonly attribute nsIRDFDataSource datasource;

  /**
   * Adds active download entries to the UI
   * @param   items
   *          A list of nsIUpdateItems to entries to add
   * @param   itemCount
   *          The length of |items|
   */
  void addDownloads([array, size_is(itemCount)] in nsIUpdateItem items,
                    in unsigned long itemCount);

  /**
   * Removes an active download from the UI
   * @param   url
   *          The URL of the active download to remove
   */
  void removeDownload(in AString url);

  /**
   * Adds a download progress listener so the front end can listen to download
   * and install progress.
   * @param   listener
   *          The listener to add
   * @returns the index of the added listen in the listener list. 
   */
  long addUpdateListener(in nsIAddonUpdateListener listener);

  /**
   * Removes a download progress listener.
   * @param   index
   *          The index of the listener to remove.
   */
  void removeUpdateListenerAt(in long index);

  /**
   * Move an Item to the index of another item in its container.
   * @param   movingID
   *          The ID of an item to be moved.
   * @param   destinationID
   *          The ID of an item to move an item to.
   */
  void moveToIndexOf(in AString movingID, in AString destinationID);
};

/**
 * An item managed by the Extension System. Contains metadata that describes 
 * the item.
 * XXXben work in progress, the name of this interface will change after the
 *        update system is complete, probably to nsIAddon
 */
[scriptable, uuid(415edb0a-4f2d-485c-9e10-f262b065ab33)]
interface nsIUpdateItem : nsISupports
{
  /**
   * The GUID of the item.
   */
  readonly attribute AString  id;

  /**
   * The Version of the item, in FVF format.
   */
  readonly attribute AString  version;

  /**
   * The minimum version of the application that this item works with, 
   * in FVF format.
   */
  readonly attribute AString  minAppVersion;

  /**
   * The maximum version of the application that this item works with,
   * in FVF format.
   */
  readonly attribute AString  maxAppVersion;

  /**
   * The name of the Install Location where this item is installed.
   */
  readonly attribute AString  installLocationKey;

  /**
   * The name of this item.
   */
  readonly attribute AString  name;

  /**
   * The URL of the XPI where this item can be downloaded.
   */
  readonly attribute AString  xpiURL;

  /**
   * The URL of the icon that can be shown for this item.
   */
  readonly attribute AString  iconURL;

  /**
   * The URL of the update RDF file for this item.
   */
  readonly attribute AString  updateRDF;
  
  const unsigned long TYPE_APP         = 0x01;
  const unsigned long TYPE_EXTENSION   = 0x02;
  const unsigned long TYPE_THEME       = 0x04;
  const unsigned long TYPE_LOCALE      = 0x08;
  const unsigned long TYPE_PLUGIN      = 0x10;
  const unsigned long TYPE_MULTI_XPI   = 0x20;
  const unsigned long TYPE_ADDON       = TYPE_EXTENSION + TYPE_THEME + TYPE_LOCALE + TYPE_PLUGIN;
  const unsigned long TYPE_ANY         = TYPE_APP + TYPE_ADDON;

  /**
   * The type of this item.
   */
  readonly attribute long type;

  /**
   * Initializes this Item object.
   */
  void init(in AString id, in AString version, 
            in AString installLocationKey, in AString minAppVersion, 
            in AString maxAppVersion, in AString name,
            in AString downloadURL, in AString iconURL,
            in AString updateURL, in long type);

  /**
   * Returns a JS Object source representing an nsIUpdateItem.
   */
  readonly attribute AString objectSource;
};

/**
 * Interface for handling download and install progress notifications for 
 * addons.
 */
[scriptable, uuid(bb86037c-98c1-4c22-8e03-1e4c9fc89a8e)]
interface nsIAddonUpdateListener : nsISupports
{
  /**
   * Install/Download state has changed
   * @param   addon
   *          The addon that state changed for
   * @param   state
   *          The new state. States are defined in nsIXPIProgressDialog
   * @param   value
   *          Some data about the new state
   */
  void onStateChange(in nsIUpdateItem addon, in short state, in long value);

  /**
   * Progress occurred in the download/install operation
   * @param   addon
   *          The addon that progress occurred for
   * @param   value
   *          The value of the current progress
   * @param   maxValue
   *          The maximum value |value| can reach
   */
  void onProgress(in nsIUpdateItem addon, in unsigned long value, 
                  in unsigned long maxValue);
};

/**
 * Interface for handling notifications during the addon update check process.
 */
[scriptable, uuid(c946119f-9e7c-41aa-a794-803148045350)]
interface nsIAddonUpdateCheckListener : nsISupports
{
  /**
   * Addon update has begun
   */
  void onUpdateStarted();

  const unsigned long STATUS_NONE = 0;
  const unsigned long STATUS_UPDATE = 1;
  const unsigned long STATUS_VERSIONINFO = 2;
  const unsigned long STATUS_DATA_FOUND = 
    STATUS_UPDATE + STATUS_VERSIONINFO;
  const unsigned long STATUS_FAILURE = 4;
  const unsigned long STATUS_NO_UPDATE = 8;
  const unsigned long STATUS_DISABLED = 16;

  /**
   * Addon update has ended
   */
  void onUpdateEnded();

  /**
   * Update for an individual addon has begun
   * @param   addon
   *          A nsIUpdateItem object representing the addon being updated
   */
  void onAddonUpdateStarted(in nsIUpdateItem addon);

  /**
   * Update for an individual addon has ended
   * @param   addon
   *          A nsIUpdateItem object representing the addon being updated
   * @param   status
   *          The success or failure code of the update operation
   */
  void onAddonUpdateEnded(in nsIUpdateItem addon, in long status);
};

%{ C++
/**
 * Install Location Key for Application-Global Items
 */
#define NS_INSTALL_LOCATION_APPGLOBAL NS_LITERAL_STRING("app-global")

/**
 * Install Location Key for Application-Profile Items
 */
#define NS_INSTALL_LOCATION_APPPROFILE NS_LITERAL_STRING("app-profile")

/** 
 * The category that contains a list of contract-ids to Install Location 
 * services.
 */
#define CATEGORY_INSTALL_LOCATIONS "extension-install-locations"

/**
 * The observer topic to listen to for actions performed on installed
 * items.
 */
#define EM_ACTION_REQUESTED_TOPIC "em-action-requested"

#define EM_ITEM_INSTALLED   "item-installed"
#define EM_ITEM_UPGRADED    "item-upgraded"
#define EM_ITEM_UNINSTALLED "item-uninstalled"
#define EM_ITEM_ENABLED     "item-enabled"
#define EM_ITEM_DISABLED    "item-disabled"
#define EM_ITEM_CANCEL      "item-cancel-action"

%}