core/log: add filesystem logger

src/core/logging.hpp

@@ -1,6 +1,38 @@
 #pragma once
 
-class LogManager {
-public:
-	static void setup();
+#include <utility>
+
+#include <qlogging.h>
+#include <qobject.h>
+#include <qtextstream.h>
+#include <qtmetamacros.h>
+
+struct LogMessage {
+	explicit LogMessage(QtMsgType type, const char* category, QByteArray body)
+	    : type(type)
+	    , category(category)
+	    , body(std::move(body)) {}
+
+	QtMsgType type;
+	const char* category;
+	QByteArray body;
+};
+
+class LogManager: public QObject {
+	Q_OBJECT;
+
+public:
+	static LogManager* instance();
+
+	static void formatMessage(QTextStream& stream, const LogMessage& msg, bool color);
+
+signals:
+	void logMessage(LogMessage msg);
+
+private:
+	explicit LogManager();
+	static void messageHandler(QtMsgType type, const QMessageLogContext& context, const QString& msg);
+
+	bool colorLogs;
+	QTextStream stdoutStream;
 };