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/* -*- Mode: IDL; 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"

interface nsIFile;
interface nsIURI;
interface nsITransaction;
interface nsINavHistoryBatchCallback;

/**
 * Observer for bookmarks changes.
 */
[scriptable, uuid(c06b4e7d-15b1-4d4f-bdf7-147d2be9084a)]
interface nsINavBookmarkObserver : nsISupports
{
  /*
   * This observer should not be called for items that are tags.
   */
  readonly attribute boolean skipTags;

  /*
   * This observer should not be called for descendants when the parent is removed.
   * For example when revmoing a folder containing bookmarks.
   */
  readonly attribute boolean skipDescendantsOnItemRemoval;

  /**
   * Notifies that a batch transaction has started.
   * Other notifications will be sent during the batch, but the observer is
   * guaranteed that onEndUpdateBatch() will be called at its completion.
   * During a batch the observer should do its best to reduce the work done to
   * handle notifications, since multiple changes are going to happen in a short
   * timeframe.
   */
  void onBeginUpdateBatch();

  /**
   * Notifies that a batch transaction has ended.
   */
  void onEndUpdateBatch();

  /**
   * Notifies that an item (any type) was added.  Called after the actual
   * addition took place.
   * When a new item is created, all the items following it in the same folder
   * will have their index shifted down, but no additional notifications will
   * be sent.
   *
   * @param aItemId
   *        The id of the item that was added.
   * @param aParentId
   *        The id of the folder to which the item was added.
   * @param aIndex
   *        The item's index in the folder.
   * @param aItemType
   *        The type of the added item (see TYPE_* constants below).
   * @param aURI
   *        The URI of the added item if it was TYPE_BOOKMARK, null otherwise.
   * @param aTitle
   *        The title of the added item.
   * @param aDateAdded
   *        The stored date added value, in microseconds from the epoch.
   * @param aGuid
   *        The unique ID associated with the item.
   * @param aParentGuid
   *        The unique ID associated with the item's parent.
   * @param aSource
   *        A change source constant from nsINavBookmarksService::SOURCE_*,
   *        passed to the method that notifies the observer.
   */
  void onItemAdded(in long long aItemId,
                   in long long aParentId,
                   in long aIndex,
                   in unsigned short aItemType,
                   in nsIURI aURI,
                   in AUTF8String aTitle,
                   in PRTime aDateAdded,
                   in ACString aGuid,
                   in ACString aParentGuid,
                   in unsigned short aSource);

  /**
   * Notifies that an item was removed.  Called after the actual remove took
   * place.
   * When an item is removed, all the items following it in the same folder
   * will have their index shifted down, but no additional notifications will
   * be sent.
   *
   * @param aItemId
   *        The id of the item that was removed.
   * @param aParentId
   *        The id of the folder from which the item was removed.
   * @param aIndex
   *        The bookmark's index in the folder.
   * @param aItemType
   *        The type of the item to be removed (see TYPE_* constants below).
   * @param aURI
   *        The URI of the added item if it was TYPE_BOOKMARK, null otherwise.
   * @param aGuid
   *        The unique ID associated with the item.
   * @param aParentGuid
   *        The unique ID associated with the item's parent.
   * @param aSource
   *        A change source constant from nsINavBookmarksService::SOURCE_*,
   *        passed to the method that notifies the observer.
   */
  void onItemRemoved(in long long aItemId,
                     in long long aParentId,
                     in long aIndex,
                     in unsigned short aItemType,
                     in nsIURI aURI,
                     in ACString aGuid,
                     in ACString aParentGuid,
                     in unsigned short aSource);

  /**
   * Notifies that an item's information has changed.  This will be called
   * whenever any attributes like "title" are changed.
   *
   * @param aItemId
   *        The id of the item that was changed.
   * @param aProperty
   *        The property which changed.  Can be null for the removal of all of
   *        the annotations, in this case aIsAnnotationProperty is true.
   * @param aIsAnnotationProperty
   *        Whether or not aProperty is the name of an annotation.  If true
   *        aNewValue is always an empty string.
   * @param aNewValue
   *        For certain properties, this is set to the new value of the
   *        property (see the list below).
   * @param aLastModified
   *        The updated last-modified value.
   * @param aItemType
   *        The type of the item to be removed (see TYPE_* constants below).
   * @param aParentId
   *        The id of the folder containing the item.
   * @param aGuid
   *        The unique ID associated with the item.
   * @param aParentGuid
   *        The unique ID associated with the item's parent.
   * @param aOldValue
   *        For certain properties, this is set to the new value of the
   *        property (see the list below).
   * @param aSource
   *        A change source constant from nsINavBookmarksService::SOURCE_*,
   *        passed to the method that notifies the observer.
   *
   * @note List of values that may be associated with properties:
   *       aProperty     | aNewValue
   *       =====================================================================
   *       cleartime     | Empty string (all visits to this item were removed).
   *       title         | The new title.
   *       favicon       | The "moz-anno" URL of the new favicon.
   *       uri           | new URL.
   *       tags          | Empty string (tags for this item changed)
   *       dateAdded     | PRTime (as string) when the item was first added.
   *       lastModified  | PRTime (as string) when the item was last modified.
   *
   *       aProperty     | aOldValue
   *       =====================================================================
   *       cleartime     | Empty string (currently unused).
   *       title         | Empty string (currently unused).
   *       favicon       | Empty string (currently unused).
   *       uri           | old URL.
   *       tags          | Empty string (currently unused).
   *       dateAdded     | Empty string (currently unused).
   *       lastModified  | Empty string (currently unused).
   */
  void onItemChanged(in long long aItemId,
                     in ACString aProperty,
                     in boolean aIsAnnotationProperty,
                     in AUTF8String aNewValue,
                     in PRTime aLastModified,
                     in unsigned short aItemType,
                     in long long aParentId,
                     in ACString aGuid,
                     in ACString aParentGuid,
                     in AUTF8String aOldValue,
                     in unsigned short aSource);

  /**
   * Notifies that the item was visited.  Can be invoked only for TYPE_BOOKMARK
   * items.
   *
   * @param aItemId
   *        The id of the bookmark that was visited.
   * @param aVisitId
   *        The id of the visit.
   * @param aTime
   *        The time of the visit.
   * @param aTransitionType
   *        The transition for the visit.  See nsINavHistoryService::TRANSITION_*
   *        constants for a list of possible values.
   * @param aURI
   *        The nsIURI for this bookmark.
   * @param aParentId
   *        The id of the folder containing the item.
   * @param aGuid
   *        The unique ID associated with the item.
   * @param aParentGuid
   *        The unique ID associated with the item's parent.
   *
   * @see onItemChanged with property = "cleartime" for when all visits to an
   *      item are removed.
   *
   * @note The reported time is the time of the visit that was added, which may
   *       be well in the past since the visit time can be specified.  This
   *       means that the visit the observer is told about may not be the most
   *       recent visit for that page.
   */
  void onItemVisited(in long long aItemId,
                     in long long aVisitId,
                     in PRTime aTime,
                     in unsigned long aTransitionType,
                     in nsIURI aURI,
                     in long long aParentId,
                     in ACString aGuid,
                     in ACString aParentGuid);

  /**
   * Notifies that an item has been moved.
   *
   * @param aItemId
   *        The id of the item that was moved.
   * @param aOldParentId
   *        The id of the old parent.
   * @param aOldIndex
   *        The old index inside the old parent.
   * @param aNewParentId
   *        The id of the new parent.
   * @param aNewIndex
   *        The index inside the new parent.
   * @param aItemType
   *        The type of the item to be removed (see TYPE_* constants below).
   * @param aGuid
   *        The unique ID associated with the item.
   * @param aOldParentGuid
   *        The unique ID associated with the old item's parent.
   * @param aNewParentGuid
   *        The unique ID associated with the new item's parent.
   * @param aSource
   *        A change source constant from nsINavBookmarksService::SOURCE_*,
   *        passed to the method that notifies the observer.
   */
  void onItemMoved(in long long aItemId,
                   in long long aOldParentId,
                   in long aOldIndex,
                   in long long aNewParentId,
                   in long aNewIndex,
                   in unsigned short aItemType,
                   in ACString aGuid,
                   in ACString aOldParentGuid,
                   in ACString aNewParentGuid,
                   in unsigned short aSource);
};

/**
 * The BookmarksService interface provides methods for managing bookmarked
 * history items.  Bookmarks consist of a set of user-customizable
 * folders.  A URI in history can be contained in one or more such folders.
 */

[scriptable, uuid(24533891-afa6-4663-b72d-3143d03f1b04)]
interface nsINavBookmarksService : nsISupports
{
  /**
   * The item ID of the Places root.
   */
  readonly attribute long long placesRoot;

  /**
   * The item ID of the bookmarks menu folder.
   */
  readonly attribute long long bookmarksMenuFolder;

  /**
   * The item ID of the top-level folder that contain the tag "folders".
   */
  readonly attribute long long tagsFolder;

 /**
  * The item ID of the unfiled-bookmarks folder.
  */
  readonly attribute long long unfiledBookmarksFolder;

  /**
   * The item ID of the personal toolbar folder.
   */
  readonly attribute long long toolbarFolder;

  /**
   * The item ID of the mobile bookmarks folder.
   */
  readonly attribute long long mobileFolder;

  /**
   * This value should be used for APIs that allow passing in an index
   * where an index is not known, or not required to be specified.
   * e.g.: When appending an item to a folder.
   */
  const short DEFAULT_INDEX = -1;

  const unsigned short TYPE_BOOKMARK = 1;
  const unsigned short TYPE_FOLDER = 2;
  const unsigned short TYPE_SEPARATOR = 3;
  // Dynamic containers are deprecated and unsupported.
  // This const exists just to avoid reusing the value.
  const unsigned short TYPE_DYNAMIC_CONTAINER = 4;

  // Change source constants. These are used to distinguish changes made by
  // Sync and bookmarks import from other Places consumers, though they can
  // be extended to support other callers. Sources are passed as optional
  // parameters to methods used by Sync, and forwarded to observers.
  const unsigned short SOURCE_DEFAULT = 0;
  const unsigned short SOURCE_SYNC = 1;
  const unsigned short SOURCE_IMPORT = 2;
  const unsigned short SOURCE_IMPORT_REPLACE = 3;
  const unsigned short SOURCE_SYNC_REPARENT_REMOVED_FOLDER_CHILDREN = 4;

  /**
   * Sync status flags.
   */
  // "UNKNOWN" means sync tracking information was lost because the item
  // was restored from a backup, and needs to be reconciled with the server.
  // This is set for migrated and restored bookmarks, and changed to "NORMAL"
  // before upload.
  const unsigned short SYNC_STATUS_UNKNOWN = 0;
  // "NEW" means the item has never been synced, so we don't need to write
  // a tombstone if it's deleted. This is set for all new local bookmarks, and
  // changed to "NORMAL" before upload.
  const unsigned short SYNC_STATUS_NEW = 1;
  // "NORMAL" means the item has been uploaded to the server, and needs a
  // tombstone if it's deleted.
  const unsigned short SYNC_STATUS_NORMAL = 2;

  /**
   * Inserts a child bookmark into the given folder.
   *
   *  @param aParentId
   *         The id of the parent folder
   *  @param aURI
   *         The URI to insert
   *  @param aIndex
   *         The index to insert at, or DEFAULT_INDEX to append
   *  @param aTitle
   *         The title for the new bookmark
   *  @param [optional] aGuid
   *         The GUID to be set for the new item.  If not set, a new GUID is
   *         generated.  Unless you've a very sound reason, such as an undo
   *         manager implementation, do not pass this argument.
   *  @param [optional] aSource
   *         The change source. This is forwarded to all bookmark observers,
   *         allowing them to distinguish between insertions from different
   *         callers. Defaults to SOURCE_DEFAULT if omitted.
   *  @return The ID of the newly-created bookmark.
   *
   *  @note aTitle will be truncated to TITLE_LENGTH_MAX and
   *        aURI will be truncated to URI_LENGTH_MAX.
   *  @throws if aGuid is malformed.
   */
  long long insertBookmark(in long long aParentId, in nsIURI aURI,
                           in long aIndex, in AUTF8String aTitle,
                           [optional] in ACString aGuid,
                           [optional] in unsigned short aSource);

  /**
   * Removes a child item. Used to delete a bookmark or separator.
   *  @param aItemId
   *         The child item to remove
   *  @param [optional] aSource
   *         The change source, forwarded to all bookmark observers. Defaults
   *         to SOURCE_DEFAULT.
   */
  void removeItem(in long long aItemId, [optional] in unsigned short aSource);

  /**
   * Creates a new child folder and inserts it under the given parent.
   *  @param aParentFolder
   *         The id of the parent folder
   *  @param aName
   *         The name of the new folder
   *  @param aIndex
   *         The index to insert at, or DEFAULT_INDEX to append
   *  @param [optional] aGuid
   *         The GUID to be set for the new item.  If not set, a new GUID is
   *         generated.  Unless you've a very sound reason, such as an undo
   *         manager implementation, do not pass this argument.
   *  @param [optional] aSource
   *         The change source, forwarded to all bookmark observers. Defaults
   *         to SOURCE_DEFAULT.
   *  @return The ID of the newly-inserted folder.
   *  @throws if aGuid is malformed.
   */
  long long createFolder(in long long aParentFolder, in AUTF8String name,
                         in long index,
                         [optional] in ACString aGuid,
                         [optional] in unsigned short aSource);

  /**
   * Gets an undo-able transaction for removing a folder from the bookmarks
   * tree.
   *  @param aItemId
   *         The id of the folder to remove.
   *  @param [optional] aSource
   *         The change source, forwarded to all bookmark observers. Defaults
   *         to SOURCE_DEFAULT.
   *  @return An object implementing nsITransaction that can be used to undo
   *          or redo the action.
   *
   * This method exists because complex delete->undo operations rely on
   * recreated folders to have the same ID they had before they were deleted,
   * so that any other items deleted in different transactions can be
   * re-inserted correctly. This provides a safe encapsulation of this
   * functionality without exposing the ability to recreate folders with
   * specific IDs (potentially dangerous if abused by other code!) in the
   * public API.
   */
  nsITransaction getRemoveFolderTransaction(in long long aItemId,
                                            [optional] in unsigned short aSource);

  /**
   * Convenience function for container services.  Removes
   * all children of the given folder.
   *  @param aItemId
   *         The id of the folder to remove children from.
   *  @param [optional] aSource
   *         The change source, forwarded to all bookmark observers. Defaults
   *         to SOURCE_DEFAULT.
   */
  void removeFolderChildren(in long long aItemId,
                            [optional] in unsigned short aSource);

  /**
   * Moves an item to a different container, preserving its contents.
   *  @param aItemId
   *         The id of the item to move
   *  @param aNewParentId
   *         The id of the new parent
   *  @param aIndex
   *         The index under aNewParent, or DEFAULT_INDEX to append
   *  @param [optional] aSource
   *         The change source, forwarded to all bookmark observers. Defaults
   *         to SOURCE_DEFAULT.
   *
   * NOTE: When moving down in the same container we take into account the
   * removal of the original item. If you want to move from index X to
   * index Y > X you must use moveItem(id, folder, Y + 1)
   */
  void moveItem(in long long aItemId,
                in long long aNewParentId,
                in long aIndex,
                [optional] in unsigned short aSource);

  /**
   * Inserts a bookmark separator into the given folder at the given index.
   * The separator can be removed using removeChildAt().
   *  @param aParentId
   *         The id of the parent folder
   *  @param aIndex
   *         The separator's index under folder, or DEFAULT_INDEX to append
   *  @param [optional] aGuid
   *         The GUID to be set for the new item.  If not set, a new GUID is
   *         generated.  Unless you've a very sound reason, such as an undo
   *         manager implementation, do not pass this argument.
   *  @param [optional] aSource
   *         The change source, forwarded to all bookmark observers. Defaults
   *         to SOURCE_DEFAULT.
   *  @return The ID of the new separator.
   *  @throws if aGuid is malformed.
   */
  long long insertSeparator(in long long aParentId, in long aIndex,
                            [optional] in ACString aGuid,
                            [optional] in unsigned short aSource);

  /**
   * Get the itemId given the containing folder and the index.
   *  @param aParentId
   *         The id of the diret parent folder of the item
   *  @param aIndex
   *         The index of the item within the parent folder.
   *         Pass DEFAULT_INDEX for the last item.
   *  @return The ID of the found item, -1 if the item does not exists.
   */
  long long getIdForItemAt(in long long aParentId, in long aIndex);

  /**
   * Set the title for an item.
   *  @param aItemId
   *         The id of the item whose title should be updated.
   *  @param aTitle
   *         The new title for the bookmark.
   *  @param [optional] aSource
   *         The change source, forwarded to all bookmark observers. Defaults
   *         to SOURCE_DEFAULT.
   *
   *  @note  aTitle will be truncated to TITLE_LENGTH_MAX.
   */
  void setItemTitle(in long long aItemId, in AUTF8String aTitle,
                    [optional] in unsigned short aSource);

  /**
   * Get the title for an item.
   *
   * If no item title is available it will return a void string (null in JS).
   *
   *  @param aItemId
   *         The id of the item whose title should be retrieved
   *  @return The title of the item.
   */
  AUTF8String getItemTitle(in long long aItemId);

  /**
   * Set the date added time for an item.
   *
   * @param aItemId
   *        the id of the item whose date added time should be updated.
   * @param aDateAdded
   *        the new date added value in microseconds.  Note that it is rounded
   *        down to milliseconds precision.
   *  @param [optional] aSource
   *         The change source, forwarded to all bookmark observers. Defaults
   *         to SOURCE_DEFAULT.
   */
  void setItemDateAdded(in long long aItemId,
                        in PRTime aDateAdded,
                        [optional] in unsigned short aSource);

  /**
   * Get the date added time for an item.
   *
   * @param aItemId
   *        the id of the item whose date added time should be retrieved.
   *
   * @return the date added value in microseconds.
   */
  PRTime getItemDateAdded(in long long aItemId);

  /**
   * Set the last modified time for an item.
   *
   * @param aItemId
   *        the id of the item whose last modified time should be updated.
   * @param aLastModified
   *        the new last modified value in microseconds.  Note that it is
   *        rounded down to milliseconds precision.
   * @param [optional] aSource
   *        The change source, forwarded to all bookmark observers. Defaults
   *        to SOURCE_DEFAULT.
   *
   * @note This is the only method that will send an itemChanged notification
   *       for the property.  lastModified will still be updated in
   *       any other method that changes an item property, but we will send
   *       the corresponding itemChanged notification instead.
   */
  void setItemLastModified(in long long aItemId,
                           in PRTime aLastModified,
                           [optional] in unsigned short aSource);

  /**
   * Get the last modified time for an item.
   *
   * @param aItemId
   *        the id of the item whose last modified time should be retrieved.
   *
   * @return the date added value in microseconds.
   *
   * @note When an item is added lastModified is set to the same value as
   *       dateAdded.
   */
  PRTime getItemLastModified(in long long aItemId);

  /**
   * Get the URI for a bookmark item.
   */
  nsIURI getBookmarkURI(in long long aItemId);

  /**
   * Get the index for an item.
   */
  long getItemIndex(in long long aItemId);

  /**
   * Changes the index for a item. This method does not change the indices of
   * any other items in the same folder, so ensure that the new index does not
   * already exist, or change the index of other items accordingly, otherwise
   * the indices will become corrupted.
   *
   * WARNING: This is API is intended for scenarios such as folder sorting,
   *          where the caller manages the indices of *all* items in the folder.
   *          You must always ensure each index is unique after a reordering.
   *
   *  @param aItemId    The id of the item to modify
   *  @param aNewIndex  The new index
   *  @param aSource    The optional change source, forwarded to all bookmark
   *                    observers. Defaults to SOURCE_DEFAULT.
   *
   *  @throws If aNewIndex is out of bounds.
   */
  void setItemIndex(in long long aItemId,
                    in long aNewIndex,
                    [optional] in unsigned short aSource);

  /**
   * Get an item's type (bookmark, separator, folder).
   * The type is one of the TYPE_* constants defined above.
   */
  unsigned short getItemType(in long long aItemId);

  /**
   * Returns true if the given URI is in any bookmark folder. If you want the
   * results to be redirect-aware, use getBookmarkedURIFor()
   */
  boolean isBookmarked(in nsIURI aURI);

  /**
   * Used to see if the given URI is bookmarked, or any page that redirected to
   * it is bookmarked. For example, if I bookmark "mozilla.org" by manually
   * typing it in, and follow the bookmark, I will get redirected to
   * "www.mozilla.org". Logically, this new page is also bookmarked. This
   * function, if given "www.mozilla.org", will return the URI of the bookmark,
   * in this case "mozilla.org".
   *
   * If there is no bookmarked page found, it will return NULL.
   *
   * @note The function will only return bookmarks in the first 2 levels of
   *       redirection (1 -> 2 -> aURI).
   */
  nsIURI getBookmarkedURIFor(in nsIURI aURI);

  /**
   * Change the bookmarked URI for a bookmark.
   * This changes which "place" the bookmark points at,
   * which means all annotations, etc are carried along.
   */
  void changeBookmarkURI(in long long aItemId,
                         in nsIURI aNewURI,
                         [optional] in unsigned short aSource);

  /**
   * Get the parent folder's id for an item.
   */
  long long getFolderIdForItem(in long long aItemId);

  /**
   * Returns the list of bookmark ids that contain the given URI.
   */
  void getBookmarkIdsForURI(in nsIURI aURI, [optional] out unsigned long count,
                            [array, retval, size_is(count)] out long long bookmarks);

  /**
   * Associates the given keyword with the given bookmark.
   *
   * Use an empty keyword to clear the keyword associated with the URI.
   * In both of these cases, succeeds but does nothing if the URL/keyword is not found.
   *
   * @deprecated Use PlacesUtils.keywords.insert() API instead.
   */
  void setKeywordForBookmark(in long long aItemId,
                             in AString aKeyword,
                             [optional] in unsigned short aSource);

  /**
   * Retrieves the keyword for the given bookmark. Will be void string
   * (null in JS) if no such keyword is found.
   *
   * @deprecated Use PlacesUtils.keywords.fetch() API instead.
   */
  AString getKeywordForBookmark(in long long aItemId);
  /**
   * Adds a bookmark observer. If ownsWeak is false, the bookmark service will
   * keep an owning reference to the observer.  If ownsWeak is true, then
   * aObserver must implement nsISupportsWeakReference, and the bookmark
   * service will keep a weak reference to the observer.
   */
  void addObserver(in nsINavBookmarkObserver observer, in boolean ownsWeak);

  /**
   * Removes a bookmark observer.
   */
  void removeObserver(in nsINavBookmarkObserver observer);

  /**
   * Gets an array of registered nsINavBookmarkObserver objects.
   */
  void getObservers([optional] out unsigned long count,
                    [retval, array, size_is(count)] out nsINavBookmarkObserver observers);

  /**
   * Runs the passed callback inside of a database transaction.
   * Use this when a lot of things are about to change, for example
   * adding or deleting a large number of bookmark items. Calls can
   * be nested. Observers are notified when batches begin and end, via
   * nsINavBookmarkObserver.onBeginUpdateBatch/onEndUpdateBatch.
   *
   * @param aCallback
   *        nsINavHistoryBatchCallback interface to call.
   * @param aUserData
   *        Opaque parameter passed to nsINavBookmarksBatchCallback
   */
  void runInBatchMode(in nsINavHistoryBatchCallback aCallback,
                      in nsISupports aUserData);
};