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/* -*- Mode: IDL; 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 nsIApplicationCache;
interface nsIFile;
interface nsIURI;
interface nsILoadContextInfo;

/**
 * The application cache service manages the set of application cache
 * groups.
 */
[scriptable, uuid(03b41c3d-0816-4134-8b2e-4f5afbdb1f06)]
interface nsIApplicationCacheService : nsISupports
{
    /**
     * Create group string identifying cache group according the manifest
     * URL and the given load context.
     */
    ACString buildGroupID(in nsIURI aManifestURL,
                          in nsILoadContextInfo aLoadContextInfo);

    /**
     * Same as buildGroupID method, just doesn't require load context.
     */
    ACString buildGroupIDForApp(in nsIURI aManifestURL,
                                in unsigned long aAppID,
                                in boolean aInBrowser);

    /**
     * Create a new, empty application cache for the given cache
     * group.
     */
    nsIApplicationCache createApplicationCache(in ACString group);

    /**
     * Create a new, empty application cache for the given cache
     * group residing in a custom directory with a custom quota.
     *
     * @param group
     *    URL of the manifest
     * @param directory
     *    Actually a reference to a profile directory where to
     *    create the OfflineCache sub-dir.
     * @param quota
     *    Optional override of the default quota.
     */
    nsIApplicationCache createCustomApplicationCache(in ACString group,
                                                     in nsIFile profileDir,
                                                     in int32_t quota);

    /**
     * Get an application cache object for the given client ID.
     */
    nsIApplicationCache getApplicationCache(in ACString clientID);

    /**
     * Get the currently active cache object for a cache group.
     */
    nsIApplicationCache getActiveCache(in ACString group);

    /**
     * Deactivate the currently-active cache object for a cache group.
     */
    void deactivateGroup(in ACString group);

    /**
     * Deletes some or all of an application's cache entries.  
     *
     * @param appId
     *    The mozIApplication.localId of the application.
     * 
     * @param discardOnlyBrowserEntries 
     *    If true, only entries marked as 'inBrowserElement' are deleted 
     *    (this is used by browser applications to delete user browsing 
     *    data/history.).  If false, *all* entries for the given appId are
     *    deleted (this is used for application uninstallation).
     */
    void discardByAppId(in int32_t appID, in boolean discardOnlyBrowserEntries);

    /**
     * Try to find the best application cache to serve a resource.
     */
    nsIApplicationCache chooseApplicationCache(in ACString key,
                                               [optional] in nsILoadContextInfo aLoadContextInfo);

    /**
     * Flags the key as being opportunistically cached.
     *
     * This method should also propagate the entry to other
     * application caches with the same opportunistic namespace, but
     * this is not currently implemented.
     *
     * @param cache
     *        The cache in which the entry is cached now.
     * @param key
     *        The cache entry key.
     */
    void cacheOpportunistically(in nsIApplicationCache cache, in ACString key);

    /**
     * Get the list of application cache groups.
     */
    void getGroups([optional] out unsigned long count,
                   [array, size_is(count), retval] out string groupIDs);

    /**
     * Get the list of application cache groups in the order of
     * activating time.
     */
    void getGroupsTimeOrdered([optional] out unsigned long count,
                              [array, size_is(count), retval] out string groupIDs);
};