/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * 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 nsICacheVisitor.idl, released February 23, 2001.
 * 
 * The Initial Developer of the Original Code is Netscape Communications
 * Corporation.  Portions created by Netscape are
 * Copyright (C) 2001 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s): 
 *    Gordon Sheridan <gordon@netscape.com>
 *    Patrick Beard   <beard@netscape.com>
 *    Darin Fisher    <darin@netscape.com>
 */

#include "nsISupports.idl"

/* XXX we should define device and entry info as well (stats, etc) */

interface nsICacheDeviceInfo;
interface nsICacheEntryInfo;


[scriptable, uuid(f8c08c4b-d778-49d1-a59b-866fdc500d95)]
interface nsICacheVisitor : nsISupports
{
    /**
     * Called to provide information about a cache device.
     *
     * @param deviceID - specifies the device being visited.
     * @param deviceInfo - specifies information about this device.
     *
     * @return true to start visiting all entries for this device.
     * @return false to advance to the next device.
     */
    boolean visitDevice(in string               deviceID,
                        in nsICacheDeviceInfo   deviceInfo);

    /**
     * Called to provide information about a cache entry.
     *
     * @param deviceID - specifies the device being visited.
     * @param entryInfo - specifies information about this entry.
     * 
     * @return true to visit the next entry on the current device, or if the
     *   end of the device has been reached, advance to the next device.
     * @return false to advance to the next device.
     */
    boolean visitEntry(in string                deviceID,
                       in nsICacheEntryInfo     entryInfo);
};


[scriptable, uuid(31d1c294-1dd2-11b2-be3a-c79230dca297)]
interface nsICacheDeviceInfo : nsISupports
{
    /**
     * Get a human readable description of the cache device.
     */
    readonly attribute string  description;
    
    /**
     * Get a usage report, statistics, miscellaneous data about
     * the cache device.
     */
    readonly attribute string  usageReport;
    
    /**
     * Get the number of stored cache entries.
     */
    readonly attribute unsigned long  entryCount;
    
    /**
     * Get the total size of the stored cache entries.
     */
    readonly attribute unsigned long  totalSize;

    /**
     * Get the upper limit of the size of the data the cache can store.
     */
    readonly attribute unsigned long  maximumSize;
};


[scriptable, uuid(72c64022-1dd2-11b2-b3a5-b8b859e0a1b2)]
interface nsICacheEntryInfo : nsISupports
{
    /**
     * Get the client id associated with this cache entry.
     */
    readonly attribute string  clientID;

    /**
     * Get the key identifying the cache entry.
     */
    readonly attribute string  key;
    
    /**
     * Get the number of times the cache entry has been opened.
     */
    readonly attribute long  fetchCount;

    /**
     * Get the last time the cache entry was opened (in seconds since the Epoch).
     */
    readonly attribute PRUint32  lastFetched;

    /**
     * Get the last time the cache entry was modified (in seconds since the Epoch).
     */
    readonly attribute PRUint32  lastModified;

    /**
     * Get the expiration time of the cache entry (in seconds since the Epoch).
     */
    readonly attribute PRUint32  expirationTime;

    /**
     * Get the cache entry data size.
     */
    readonly attribute unsigned long  dataSize;

    /**
     * Find out whether or not the cache entry is stream based.
     */
    boolean  isStreamBased();
};