/* -*- 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 "nsIWebProgressListener2.idl"

interface nsIURI;
interface nsICancelable;
interface nsIMIMEInfo;
interface nsIFile;

[scriptable, uuid(b1c81100-9d66-11e2-9e96-0800200c9a66)]
interface nsITransfer : nsIWebProgressListener2 {

    /**
     * Initializes the transfer with certain properties.  This function must
     * be called prior to accessing any properties on this interface.
     *
     * @param aSource The source URI of the transfer. Must not be null.
     *
     * @param aTarget The target URI of the transfer. Must not be null.
     *
     * @param aDisplayName The user-readable description of the transfer.
     *                     Can be empty.
     *
     * @param aMIMEInfo The MIME info associated with the target,
     *                  including MIME type and helper app when appropriate.
     *                  This parameter is optional.
     *
     * @param startTime Time when the download started (ie, when the first
     *                  response from the server was received)
     *                  XXX presumably wbp and exthandler do this differently
     *
     * @param aTempFile The location of a temporary file; i.e. a file in which
     *                  the received data will be stored, but which is not
     *                  equal to the target file. (will be moved to the real
     *                  target by the caller, when the download is finished)
     *                  May be null.
     *
     * @param aCancelable An object that can be used to abort the download.
     *                    Must not be null.
     *                    Implementations are expected to hold a strong
     *                    reference to this object until the download is
     *                    finished, at which point they should release the
     *                    reference.
     *
     * @param aIsPrivate Used to determine the privacy status of the new transfer.
     *                   If true, indicates that the transfer was initiated from
     *                   a source that desires privacy.
     */
    void init(in nsIURI aSource,
              in nsIURI aTarget,
              in AString aDisplayName,
              in nsIMIMEInfo aMIMEInfo,
              in PRTime startTime,
              in nsIFile aTempFile,
              in nsICancelable aCancelable,
              in boolean aIsPrivate);

    /*
     * Used to notify the transfer object of the hash of the downloaded file.
     * Must be called on the main thread, only after the download has finished
     * successfully.
     * @param aHash The SHA-256 hash in raw bytes of the downloaded file.
     */
    void setSha256Hash(in ACString aHash);
};

%{C++
/**
 * A component with this contract ID will be created each time a download is
 * started, and nsITransfer::Init will be called on it and an observer will be set.
 *
 * Notifications of the download progress will happen via
 * nsIWebProgressListener/nsIWebProgressListener2.
 *
 * INTERFACES THAT MUST BE IMPLEMENTED:
 *   nsITransfer
 *   nsIWebProgressListener
 *   nsIWebProgressListener2
 *
 * XXX move this to nsEmbedCID.h once the interfaces (and the contract ID) are
 * frozen.
 */
#define NS_TRANSFER_CONTRACTID "@mozilla.org/transfer;1"
%}
