From 4ae2945002c188da9127f4d4f82b43038a6b4a2d Mon Sep 17 00:00:00 2001
From: Jan Grewe <jan.grewe@g-node.org>
Date: Fri, 10 Nov 2023 11:04:42 +0100
Subject: [PATCH] add logger

---
 mylogger.cpp | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 mylogger.h   | 33 +++++++++++++++++++++++++++
 2 files changed, 96 insertions(+)
 create mode 100644 mylogger.cpp
 create mode 100644 mylogger.h

diff --git a/mylogger.cpp b/mylogger.cpp
new file mode 100644
index 0000000..11fb43b
--- /dev/null
+++ b/mylogger.cpp
@@ -0,0 +1,63 @@
+//This file is modified from "https://github.com/VelazcoJD/QtLogging"
+
+#include "mylogger.h"
+
+#include <QDateTime>
+#include <QDir>
+#include <QFile>
+#include <QHash>
+#include <QObject>
+
+QFile* Logger::logFile = Q_NULLPTR;
+bool Logger::isInit = false;
+QHash<QtMsgType, QString> Logger::contextNames = {
+	{QtMsgType::QtDebugMsg,		" Debug  "},
+	{QtMsgType::QtInfoMsg,		"  Info  "},
+	{QtMsgType::QtWarningMsg,	"Warning "},
+	{QtMsgType::QtCriticalMsg,	"Critical"},
+	{QtMsgType::QtFatalMsg,		" Fatal  "}
+};
+
+void Logger::init() {
+	if (isInit) {
+		return;
+	}
+	
+	// Create log file
+	logFile = new QFile;
+	logFile->setFileName("./PylonRecorder.log");
+	logFile->open(QIODevice::Append | QIODevice::Text);
+
+	// Redirect logs to messageOutput
+	qInstallMessageHandler(Logger::messageOutput);
+
+	// Clear file contents
+	logFile->resize(0);
+
+	Logger::isInit = true;
+}
+
+void Logger::clean() {
+	if (logFile != Q_NULLPTR) {
+		logFile->close();
+		delete logFile;
+	}
+}
+
+void Logger::messageOutput(QtMsgType type, const QMessageLogContext& context, const QString& msg) {
+
+	QString log = QObject::tr("%1 | %2 | %3 | %4 | %5 | %6\n").
+		arg(QDateTime::currentDateTime().toString("dd-MM-yyyy hh:mm:ss")).
+		arg(Logger::contextNames.value(type)).
+		arg(context.line).
+		arg(QString(context.file).
+			section('/', -1)).			// File name without file path											
+		arg(QString(context.function).
+			section('(', -2, -2).		// Function name only
+			section(' ', -1).
+			section(':', -1)).
+		arg(msg);
+
+	logFile->write(log.toLocal8Bit());
+	logFile->flush();
+}
\ No newline at end of file
diff --git a/mylogger.h b/mylogger.h
new file mode 100644
index 0000000..65534f6
--- /dev/null
+++ b/mylogger.h
@@ -0,0 +1,33 @@
+
+//This file is modified from "https://github.com/VelazcoJD/QtLogging"
+#ifndef MYLOGGER_H
+#define MYLOGGER_H
+
+#include <QDebug>
+#include <QFile>
+#include <QHash>
+
+class Logger {
+private:
+	/// @brief The file object where logs are written to.
+	static QFile* logFile;
+
+	/// @brief Whether the logger has being initialized.
+	static bool isInit;
+
+	/// @brief The different type of contexts.
+	static QHash<QtMsgType, QString> contextNames;
+
+public:
+	/// @brief Initializes the logger.
+	static void init();
+
+	/// @brief Cleans up the logger.
+	static void clean();
+
+	/// @brief The function which handles the logging of text.
+	static void messageOutput(QtMsgType type, const QMessageLogContext& context,
+		const QString& msg);
+};
+
+#endif /* !MYLOGGER_H */
\ No newline at end of file