/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 nsIURI;
interface nsIChannel;
webidl Document;

/**
 * @see nsICookieService::runInTransaction
 */
[scriptable, function, uuid(0fc41ffb-f1b7-42d9-9a42-8dc420c158c1)]
interface nsICookieTransactionCallback : nsISupports
{
  void callback();
};

/**
 * nsICookieService
 *
 * Provides methods for setting and getting cookies in the context of a
 * page load.  See nsICookieManager for methods to manipulate the cookie
 * database directly.  This separation of interface is mainly historical.
 *
 * This service broadcasts the notifications detailed below when the cookie
 * list is changed, or a cookie is rejected.
 *
 * NOTE: observers of these notifications *must* not attempt to change profile
 *       or switch into or out of private browsing mode from within the
 *       observer. Doing so will cause undefined behavior. Mutating the cookie
 *       list (e.g. by calling methods on nsICookieService and friends) is
 *       allowed, but beware that there may be pending notifications you haven't
 *       seen yet -- for instance, a "batch-deleted" notification will likely be
 *       immediately followed by "added". You may check the state of the cookie
 *       list to determine if this is the case.
 *
 * topic  : "cookie-changed"
 *          broadcast whenever the cookie list changes in some way. see
 *          explanation of data strings below.
 * subject: see below.
 * data   : "deleted"
 *          a cookie was deleted. the subject is an nsICookie representing
 *          the deleted cookie.
 *          "added"
 *          a cookie was added. the subject is an nsICookie representing
 *          the added cookie.
 *          "changed"
 *          a cookie was changed. the subject is an nsICookie representing
 *          the new cookie. (note that host, path, and name are invariant
 *          for a given cookie; other parameters may change.)
 *          "batch-deleted"
 *          a set of cookies was purged (typically, because they have either
 *          expired or because the cookie list has grown too large). The subject
 *          is an nsIArray of nsICookie's representing the deleted cookies.
 *          Note that the array could contain a single cookie.
 *          "cleared"
 *          the entire cookie list was cleared. the subject is null.
 *
 * topic  : "cookie-rejected"
 *          broadcast whenever a cookie was rejected from being set as a
 *          result of user prefs.
 * subject: an nsIURI interface pointer representing the URI that attempted
 *          to set the cookie.
 * data   : none.
 */
[scriptable, uuid(1e94e283-2811-4f43-b947-d22b1549d824)]
interface nsICookieService : nsISupports
{
  /*
   * Possible values for the "network.cookie.cookieBehavior" preference.
   */
  const uint32_t BEHAVIOR_ACCEPT         = 0; // allow all cookies
  const uint32_t BEHAVIOR_REJECT_FOREIGN = 1; // reject all third-party cookies
  const uint32_t BEHAVIOR_REJECT         = 2; // reject all cookies
  const uint32_t BEHAVIOR_LIMIT_FOREIGN  = 3; // reject third-party cookies unless the
                                              // eTLD already has at least one cookie
  const uint32_t BEHAVIOR_REJECT_TRACKER = 4; // reject trackers
  const uint32_t BEHAVIOR_REJECT_TRACKER_AND_PARTITION_FOREIGN = 5; // reject trackers, partition third-party cookies
  // When adding a new cookie behavior, please increase this value!
  const uint32_t BEHAVIOR_LAST           = 5;

  /*
   * Possible values for the "network.cookie.lifetimePolicy" preference.
   */
  const uint32_t ACCEPT_NORMALLY   = 0; // accept normally
  // Value = 1 is considered the same as 0 (See Bug 606655).
  const uint32_t ACCEPT_SESSION    = 2; // downgrade to session
  // Value = 3 is considered the same as 0

  /*
   * Get the complete cookie string associated with the document's principal.
   * This method is meant to be used for `document.cookie` only. Any security
   * check about storage-access permission and cookie behavior must be done by
   * the caller.
   *
   * @param aDocument
   *        The document.
   *
   * @return the resulting cookie string
   */
  ACString getCookieStringFromDocument(in Document aDocument);

  /*
   * Get the complete cookie string associated with the URI.
   *
   * This function is NOT redundant with getCookieString, as the result
   * will be different based on httponly (see bug 178993)
   *
   * @param aURI
   *        The URI of the document for which cookies are being queried.
   *        file:// URIs (i.e. with an empty host) are allowed, but any other
   *        scheme must have a non-empty host. A trailing dot in the host
   *        is acceptable, and will be stripped. This argument must not be null.
   * @param aChannel
   *        the channel used to load the document.
   *
   * @return the resulting cookie string
   */
  ACString getCookieStringFromHttp(in nsIURI aURI, in nsIChannel aChannel);

  /*
   * Set the cookie string associated with a Document. This method is meant to
   * be used for `document.cookie` only. Any security check about
   * storage-access permission and cookie behavior must be done by the caller.
   *
   * @param aDocument
   *        The document.
   * @param aCookie
   *        the cookie string to set.
   */
  void setCookieStringFromDocument(in Document aDocument, in ACString aCookie);

  /*
   * Set the cookie string and expires associated with the URI.
   *
   * This function is NOT redundant with setCookieString, as the result
   * will be different based on httponly (see bug 178993)
   *
   * @param aURI
   *        The URI of the document for which cookies are being queried.
   *        file:// URIs (i.e. with an empty host) are allowed, but any other
   *        scheme must have a non-empty host. A trailing dot in the host
   *        is acceptable, and will be stripped. This argument must not be null.
   * @param aCookie
   *        the cookie string to set.
   * @param aChannel
   *        the channel used to load the document.
   */
  void setCookieStringFromHttp(in nsIURI aURI, in ACString aCookie,
                               in nsIChannel aChannel);

  /*
   * Batch SQLite operations into one transaction. By default each call to
   * CookieService that affects the underlying SQLite database (add, remove,
   * setCookieString etc.) runs in a separate transaction.  If you do this many
   * times in a row, it's faster and suggested to wrap them all in a single
   * transaction by setting all the operations into the callback parameter.
   * Example: test scripts that need to construct a large cookie database.
   * @param aCallback
   *        nsICookieTransactionCallback interface to call
   * @throws NS_ERROR_FAILURE if aCallback() fails.
   * @throws NS_ERROR_NOT_AVAILABLE if the connection is not established.
   */
   void runInTransaction(in nsICookieTransactionCallback aCallback);
};