/***************************************************************************
- * Copyright (C) 2005 by the Quassel Project *
+ * Copyright (C) 2005-2018 by the Quassel Project *
* devel@quassel-irc.org *
* *
* This program is free software; you can redistribute it and/or modify *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
-#ifndef LOGGER_H
-#define LOGGER_H
+#pragma once
-#include "types.h"
+#include <vector>
+#include <QDateTime>
+#include <QFile>
+#include <QMetaType>
+#include <QObject>
#include <QString>
-#include <QStringList>
-#include <QTextStream>
-
-class Logger {
- public:
- enum LogLevel {
- DebugLevel,
- InfoLevel,
- WarningLevel,
- ErrorLevel
+
+/**
+ * The Logger class encapsulates the various configured logging backends.
+ */
+class Logger : public QObject
+{
+ Q_OBJECT
+
+public:
+ Logger(QObject *parent = nullptr);
+ ~Logger() override;
+
+ enum class LogLevel {
+ Debug,
+ Info,
+ Warning,
+ Error,
+ Fatal
};
- inline Logger(LogLevel level) : _stream(&_buffer, QIODevice::WriteOnly), _logLevel(level) {}
- ~Logger();
+ struct LogEntry {
+ QDateTime timeStamp;
+ LogLevel logLevel;
+ QString message;
+ };
- template<typename T>
- inline Logger &operator<<(const T &value) { _stream << value; return *this; }
- inline Logger &operator<<(const QStringList & t) { _stream << t.join(" "); return *this; }
- inline Logger &operator<<(bool t) { _stream << (t ? "true" : "false"); return *this; }
+ /**
+ * Initial setup, to be called ones command line options are available.
+ *
+ * Sets up the log file if appropriate. Outputs the log messages already accumulated since
+ * construction. If @c keepMessages is false, deletes the accumulated messages afterwards,
+ * and won't store further ones.
+ *
+ * @param keepMessages Whether messages should be kept
+ * @returns true, if initialization was successful
+ */
+ bool setup(bool keepMessages);
- private:
- void log();
- QTextStream _stream;
- QString _buffer;
- LogLevel _logLevel;
-};
+ /**
+ * Accesses the stores log messages, e.g. for consumption by DebugLogWidget.
+ *
+ * @returns The accumuates log messages
+ */
+ std::vector<Logger::LogEntry> messages() const;
-class quDebug : public Logger {
- public:
- inline quDebug() : Logger(Logger::DebugLevel) {}
-};
+#if QT_VERSION < 0x050000
+ static void messageHandler(QtMsgType type, const char *message);
+#else
+ static void messageHandler(QtMsgType type, const QMessageLogContext &context, const QString &message);
+#endif
-class quInfo : public Logger {
- public:
- inline quInfo() : Logger(Logger::InfoLevel) {}
-};
+ /**
+ * Takes the given message with the given log level, formats it and emits the @a messageLogged() signal.
+ *
+ * @note This method is thread-safe.
+ *
+ * @param logLevel The log leve of the message
+ * @param message The message
+ */
+ void handleMessage(LogLevel logLevel, const QString &message);
-class quWarning : public Logger {
- public:
- inline quWarning() : Logger(Logger::WarningLevel) {}
-};
+signals:
+ /**
+ * Emitted whenever a message was logged.
+ *
+ * @param message The message that was logged
+ */
+ void messageLogged(const Logger::LogEntry &message);
+
+private slots:
+ void onMessageLogged(const Logger::LogEntry &message);
+
+private:
+ void handleMessage(QtMsgType type, const QString &message);
+ void outputMessage(const LogEntry &message);
-class quError : public Logger {
- public:
- inline quError() : Logger(Logger::ErrorLevel) {}
+private:
+ LogLevel _outputLevel{LogLevel::Info};
+ QFile _logFile;
+ bool _syslogEnabled{false};
+
+ std::vector<LogEntry> _messages;
+ bool _keepMessages{true};
+ bool _initialized{false};
};
-#endif
+
+Q_DECLARE_METATYPE(Logger::LogEntry)