/* ***** 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 mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Joe Hewitt <hewitt@netscape.com> (Original Author)
 *
 * 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 mozIStorageConnection;

/**
 * The nsIFormHistory object is a service which holds a set of name/value
 * pairs.  The names correspond to form field names, and the values correspond
 * to values the user has submitted.  So, several values may exist for a single
 * name.
 *
 * Note: this interface provides no means to access stored values.
 * Stored values are used by the FormFillController to generate
 * autocomplete matches.
 */

[scriptable, uuid(5d7d84d1-9798-4016-bf61-a32acf09b29d)]
interface nsIFormHistory2 : nsISupports
{
  /**
   * Returns true if the form history has any entries.
   */
  readonly attribute boolean hasEntries;
  
  /**
   * Adds a name and value pair to the form history.
   */
  void addEntry(in AString name, in AString value);

  /**
   * Removes a name and value pair from the form history.
   */
  void removeEntry(in AString name, in AString value);

  /**
   * Removes all entries that are paired with a name.
   */
  void removeEntriesForName(in AString name);
  
  /**
   * Removes all entries in the entire form history.
   */
  void removeAllEntries();

  /**
   * Returns true if there is no entry that is paired with a name.
   */
  boolean nameExists(in AString name);

  /**
   * Gets whether a name and value pair exists in the form history.
   */
  boolean entryExists(in AString name, in AString value);

  /**
   * Removes entries that were created between the specified times.
   *
   * @param aBeginTime
   *        The beginning of the timeframe, in microseconds
   * @param aEndTime
   *        The end of the timeframe, in microseconds
   */
  void removeEntriesByTimeframe(in long long aBeginTime, in long long aEndTime);

  /**
   * Returns the underlying DB connection the form history module is using.
   */
  readonly attribute mozIStorageConnection DBConnection;
};
