From 1504bbfe434f92878290da1dbb4b3b7eee248c1c Mon Sep 17 00:00:00 2001
From: sledgehammer999 <hammered999@gmail.com>
Date: Sun, 4 Jan 2015 02:20:59 +0200
Subject: [PATCH] Logger base class.

---
 src/logger.cpp | 127 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/logger.h   |  83 ++++++++++++++++++++++++++++++++
 src/src.pro    |   6 ++-
 3 files changed, 214 insertions(+), 2 deletions(-)
 create mode 100644 src/logger.cpp
 create mode 100644 src/logger.h

diff --git a/src/logger.cpp b/src/logger.cpp
new file mode 100644
index 000000000..bdd4379dd
--- /dev/null
+++ b/src/logger.cpp
@@ -0,0 +1,127 @@
+#include "logger.h"
+
+#include <QDateTime>
+
+namespace Log
+{
+    Msg::Msg() {}
+
+    Msg::Msg(int id, MsgType type, const QString &message)
+        : id(id)
+        , timestamp(QDateTime::currentMSecsSinceEpoch())
+        , type(type)
+        , message(message)
+    {
+    }
+
+    Peer::Peer() {}
+
+#if LIBTORRENT_VERSION_NUM < 10000
+    Peer::Peer(int id, const QString &ip, bool blocked)
+#else
+    Peer::Peer(int id, const QString &ip, bool blocked, const QString &reason)
+#endif
+        : id(id)
+        , timestamp(QDateTime::currentMSecsSinceEpoch())
+        , ip(ip)
+        , blocked(blocked)
+#if LIBTORRENT_VERSION_NUM >= 10000
+        , reason(reason)
+#endif
+    {
+    }
+
+}
+
+Logger* Logger::m_instance = 0;
+
+Logger::Logger()
+    : lock(QReadWriteLock::Recursive)
+    , msgCounter(0)
+    , peerCounter(0)
+{
+}
+
+Logger::~Logger() {}
+
+Logger * Logger::instance()
+{
+    if (!m_instance)
+        m_instance = new Logger;
+
+    return m_instance;
+}
+
+void Logger::drop()
+{
+    if (m_instance) {
+        delete m_instance;
+        m_instance = 0;
+    }
+}
+
+void Logger::addMessage(const QString &message, const Log::MsgType &type)
+{
+    QWriteLocker locker(&lock);
+
+    Log::Msg temp(msgCounter++, type, message);
+    m_messages.push_back(temp);
+
+    if (m_messages.size() >= MAX_LOG_MESSAGES)
+        m_messages.pop_front();
+
+    emit newLogMessage(temp);
+}
+
+#if LIBTORRENT_VERSION_NUM < 10000
+void Logger::addPeer(const QString &ip, bool blocked)
+#else
+void Logger::addPeer(const QString &ip, bool blocked, const QString &reason)
+#endif
+{
+    QWriteLocker locker(&lock);
+
+#if LIBTORRENT_VERSION_NUM < 10000
+    Log::Peer temp(peerCounter++, ip, blocked);
+#else
+    Log::Peer temp(peerCounter++, ip, blocked, reason);
+#endif
+    m_peers.push_back(temp);
+
+    if (m_peers.size() >= MAX_LOG_MESSAGES)
+        m_peers.pop_front();
+
+    emit newLogPeer(temp);
+}
+
+QVector<Log::Msg> Logger::getMessages(int lastKnownId) const
+{
+    QReadLocker locker(&lock);
+
+    int diff = msgCounter - lastKnownId - 1;
+    int size = m_messages.size();
+
+    if ((lastKnownId == -1) || (diff >= size))
+        return m_messages;
+
+    if (diff <= 0)
+        return QVector<Log::Msg>();
+
+    return m_messages.mid(size - diff);
+}
+
+QVector<Log::Peer> Logger::getPeers(int lastKnownId) const
+{
+    QReadLocker locker(&lock);
+
+    int diff = peerCounter - lastKnownId - 1;
+    int size = m_peers.size();
+
+    if ((lastKnownId == -1) || (diff >= size))
+        return m_peers;
+
+    if (diff <= 0)
+        return QVector<Log::Peer>();
+
+    return m_peers.mid(size - diff);
+}
diff --git a/src/logger.h b/src/logger.h
new file mode 100644
index 000000000..eb53dd023
--- /dev/null
+++ b/src/logger.h
@@ -0,0 +1,83 @@
+#ifndef LOGGER_H
+#define LOGGER_H
+
+#include <QString>
+#include <QVector>
+#include <QReadWriteLock>
+#include <QObject>
+#include <libtorrent/version.hpp>
+
+const int MAX_LOG_MESSAGES = 1000;
+
+namespace Log
+{
+    enum MsgType
+    {
+        NORMAL,
+        INFO,
+        WARNING,
+        CRITICAL //ERROR is defined by libtorrent and results in compiler error
+    };
+
+    struct Msg
+    {
+        Msg();
+        Msg(int id, MsgType type, const QString &message);
+        int id;
+        qint64 timestamp;
+        MsgType type;
+        QString message;
+    };
+
+    struct Peer
+    {
+#if LIBTORRENT_VERSION_NUM < 10000
+        Peer(int id, const QString &ip, bool blocked);
+#else
+        Peer(int id, const QString &ip, bool blocked, const QString &reason);
+#endif
+        Peer();
+        int id;
+        qint64 timestamp;
+        QString ip;
+        bool blocked;
+#if LIBTORRENT_VERSION_NUM >= 10000
+        QString reason;
+#endif
+    };
+}
+
+class Logger : public QObject
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(Logger)
+
+public:
+    static Logger* instance();
+    static void drop();
+    ~Logger();
+
+    void addMessage(const QString &message, const Log::MsgType &type = Log::NORMAL);
+#if LIBTORRENT_VERSION_NUM < 10000
+    void addPeer(const QString &ip, bool blocked);
+#else
+    void addPeer(const QString &ip, bool blocked, const QString &reason = QString());
+#endif
+    QVector<Log::Msg> getMessages(int lastKnownId = -1) const;
+    QVector<Log::Peer> getPeers(int lastKnownId = -1) const;
+
+signals:
+    void newLogMessage(const Log::Msg &message);
+    void newLogPeer(const Log::Peer &peer);
+
+private:
+    Logger();
+    static Logger* m_instance;
+    QVector<Log::Msg> m_messages;
+    QVector<Log::Peer> m_peers;
+    mutable QReadWriteLock lock;
+    int msgCounter;
+    int peerCounter;
+};
+
+#endif // LOGGER_H
diff --git a/src/src.pro b/src/src.pro
index f6422b9c2..cc8eb21a3 100644
--- a/src/src.pro
+++ b/src/src.pro
@@ -110,7 +110,8 @@ HEADERS += misc.h \
            qinisettings.h \
            smtp.h \
            dnsupdater.h \
-           application.h
+           application.h \
+           logger.h
 
 SOURCES += main.cpp \
            downloadthread.cpp \
@@ -120,7 +121,8 @@ SOURCES += main.cpp \
            fs_utils.cpp \
            smtp.cpp \
            dnsupdater.cpp \
-           application.cpp
+           application.cpp \
+           logger.cpp
 
 nox {
   HEADERS += headlessloader.h