/// <summary>
/// 导入已备份在云端的消息记录
/// </summary>
/// <param name="import_info">导入需要的参数参考NIMLogsBackupImportInfo定义</param>
/// <returns>false 当前有导入/导出操作正在进行中</returns>
public static bool ImportBackupFromRemote(NIMLogsBackupImportInfo import_info)
{
bool ret = false;
if (import_info != null)
{
//这里需增长import_info的生命周期，否则import_info被gc回收掉,会导致回调出问题
import_info_remain = import_info;
import_info_c.UnPackageCallback_ = ImportBackupFromRemoteUnPackageCallback;
import_info_c.RemoteDecryptCallback_ = ImportBackupFromRemoteDecryptCallback;
import_info_c.PathRelease_ = NewPathRelease;
import_info_c.ProgressCallback_ = ImportLogsBackupProgressCallback;
import_info_c.CompleteCallback_ = ImportLogsBackupCompleteCallback;
int nSizeOfParam = Marshal.SizeOf(import_info);
IntPtr param_ptr = Marshal.AllocHGlobal(nSizeOfParam);
try
{
Marshal.StructureToPtr(import_info, param_ptr, false);
import_info_c.user_data_ = param_ptr;
}
catch
{
}
ret = MsglogNativeMethods.nim_import_backup_from_remote(ref import_info_c);
}
return(ret);
}
private static void ImportLogsBackupProgressCallback(LogsBackupRemoteOperate operate, float progress, IntPtr user_data)
{
NIMLogsBackupImportInfo import_info = (NIMLogsBackupImportInfo)Marshal.PtrToStructure(user_data, typeof(NIMLogsBackupImportInfo));
if (import_info != null && import_info.ProgressCallback_ != null)
{
import_info.ProgressCallback_(operate, progress);
}
}
private static void ImportLogsBackupCompleteCallback(LogsBackupRemoteOperate operate, LogsBackupRemoteState state, IntPtr user_data)
{
NIMLogsBackupImportInfo import_info = (NIMLogsBackupImportInfo)Marshal.PtrToStructure(user_data, typeof(NIMLogsBackupImportInfo));
if (import_info != null && import_info.CompleteCallback_ != null)
{
import_info.CompleteCallback_(operate, state);
}
//注意，这里应释放user_data
Marshal.FreeHGlobal(user_data);
}
private static IntPtr ImportBackupFromRemoteDecryptCallback(string file_path, string encrypt_key, IntPtr user_data)
{
IntPtr path = IntPtr.Zero;
NIMLogsBackupImportInfo import_info = (NIMLogsBackupImportInfo)Marshal.PtrToStructure(user_data, typeof(NIMLogsBackupImportInfo));
if (import_info != null && import_info.RemoteDecryptCallback_ != null)
{
string temp_path = import_info.RemoteDecryptCallback_(file_path, encrypt_key);
path = Utf8StringMarshaler.GetInstance("").MarshalManagedToNative(temp_path);
}
return(path);
}