private static IResolverLogger CombineLoggers(IResolverLogger lhv, IResolverLogger rhv)
{
if (lhv is null && rhv is null)
{
return(null);
}
if (lhv is null)
{
return(rhv);
}
if (rhv is null)
{
return(lhv);
}
var multiLogger = lhv as MultiLogger ?? rhv as MultiLogger ?? new MultiLogger();
if (!ReferenceEquals(multiLogger, lhv))
{
multiLogger.AddLogger(lhv);
}
if (!ReferenceEquals(multiLogger, rhv))
{
multiLogger.AddLogger(rhv);
}
return(multiLogger);
}
public void AddLogger(IResolverLogger logger)
{
if (logger is null)
{
throw new ArgumentNullException(nameof(logger));
}
_loggers.Add(logger);
}
public static IResolverLogger Build(LogType logType, string logFilePath)
{
IResolverLogger logger = default;
if ((logType & LogType.Console) != 0)
{
logger = new ConsoleLogger();
}
if ((logType & LogType.File) != 0)
{
var stream = new FileStream(logFilePath, FileMode.Append, FileAccess.Write);
var streamLogger = new StreamLogger(stream);
logger = CombineLoggers(logger, streamLogger);
}
if (logger is null)
{
logger = NullResolveLogger.Instance;
}
return(logger);
}
