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// *****************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: https://www.gnu.org/licenses/gpl-3.0 *
// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
// *****************************************************************************
#ifndef ERROR_LOG_H_8917590832147915
#define ERROR_LOG_H_8917590832147915
#include <cassert>
#include <algorithm>
#include <vector>
//#include <string>
#include "time.h"
#include "i18n.h"
#include "utf.h"
#include "zstring.h"
namespace zen
{
enum MessageType
{
MSG_TYPE_INFO = 0x1,
MSG_TYPE_WARNING = 0x2,
MSG_TYPE_ERROR = 0x4,
MSG_TYPE_FATAL_ERROR = 0x8,
};
struct LogEntry
{
time_t time = 0;
MessageType type = MSG_TYPE_FATAL_ERROR;
Zstringw message; //std::wstring may employ small string optimization: we cannot accept bloating the "ErrorLog::entries_" memory block below (think 1 million items)
};
std::wstring formatMessage(const LogEntry& entry);
class ErrorLog
{
public:
void logMsg(const std::wstring& msg, MessageType type);
int getItemCount(int typeFilter = MSG_TYPE_INFO | MSG_TYPE_WARNING | MSG_TYPE_ERROR | MSG_TYPE_FATAL_ERROR) const;
//subset of std::vector<> interface:
using const_iterator = std::vector<LogEntry>::const_iterator;
const_iterator begin() const { return entries_.begin(); }
const_iterator end () const { return entries_.end (); }
bool empty() const { return entries_.empty(); }
private:
std::vector<LogEntry> entries_;
};
//######################## implementation ##########################
inline
void ErrorLog::logMsg(const std::wstring& msg, MessageType type)
{
entries_.push_back({ std::time(nullptr), type, copyStringTo<Zstringw>(msg) });
}
inline
int ErrorLog::getItemCount(int typeFilter) const
{
return static_cast<int>(std::count_if(entries_.begin(), entries_.end(), [typeFilter](const LogEntry& e) { return e.type & typeFilter; }));
}
inline
std::wstring getMessageTypeLabel(MessageType type)
{
switch (type)
{
case MSG_TYPE_INFO:
return _("Info");
case MSG_TYPE_WARNING:
return _("Warning");
case MSG_TYPE_ERROR:
return _("Error");
case MSG_TYPE_FATAL_ERROR:
return _("Serious Error");
}
assert(false);
return std::wstring();
}
inline
std::wstring formatMessage(const LogEntry& entry)
{
std::wstring msgFmt = L"[" + formatTime<std::wstring>(FORMAT_TIME, getLocalTime(entry.time)) + L"] " + getMessageTypeLabel(entry.type) + L": ";
const size_t prefixLen = unicodeLength(msgFmt); //consider Unicode!
const Zstringw msg = trimCpy(entry.message);
static_assert(std::is_same_v<decltype(msg), const Zstringw>, "don't worry about copying as long as we're using a ref-counted string!");
for (auto it = msg.begin(); it != msg.end(); )
if (*it == L'\n')
{
msgFmt += L'\n';
msgFmt.append(prefixLen, L' ');
++it;
//skip duplicate newlines
for (;it != msg.end() && *it == L'\n'; ++it)
;
}
else
msgFmt += *it++;
return msgFmt += L'\n';
}
}
#endif //ERROR_LOG_H_8917590832147915
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