logic: fix log file did not have a name

src/lib/utility/logging/FileLogger.cpp

@@ -30,7 +30,13 @@ void FileLogger::setLogDirectory(const std::string& filePath)
 
 void FileLogger::setFileName(const std::string& fileName)
 {
-	m_logFileName = fileName;
+	if (fileName != m_logFileName)
+	{
+		m_logFileName = fileName;
+		m_currentLogLineCount = 0;
+		m_currentLogFileCount = 0;
+		updateLogFileName();
+	}
 }
 
 void FileLogger::logInfo(const LogMessage& message)

src/lib/utility/logging/LoggerUtility.cpp

@@ -21,12 +21,12 @@ std::string LoggerUtility::generateDatedFileName(const std::string& prefix, cons
 	filename << (t.tm_hour < 10 ? "0" : "") << t.tm_hour << "-";
 	filename << (t.tm_min < 10 ? "0" : "") << t.tm_min << "-";
 	filename << (t.tm_sec < 10 ? "0" : "") << t.tm_sec;
-	if (prefix.length() > 0)
+
+	if (suffix.length() > 0)
 	{
 		filename << "_";
 		filename << suffix;
 	}
 
-
 	return filename.str();
 }