forked from chrisoldwood/DDECmd
/
ValueFormatter.cpp
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/
ValueFormatter.cpp
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////////////////////////////////////////////////////////////////////////////////
//! \file ValueFormatter.cpp
//! \brief The ValueFormatter class definition.
//! \author Chris Oldwood
#include "Common.hpp"
#include "ValueFormatter.hpp"
#include <Core/StringUtils.hpp>
#include <Core/ParseException.hpp>
#include <WCL/DateTime.hpp>
#include <WCL/Win32Exception.hpp>
#include <malloc.h>
#if __GNUC__
// missing initializer for member 'X'
#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
#endif
////////////////////////////////////////////////////////////////////////////////
// Constants.
//! The default single-item format.
const tstring ValueFormatter::DEFAULT_SINGLE_ITEM_FORMAT = TXT("%v");
//! The default multi-item format.
const tstring ValueFormatter::DEFAULT_MULTI_ITEM_FORMAT = TXT("%i: %v");
//! The default timestamp date format.
const tstring ValueFormatter::DEFAULT_DATE_FORMAT = TXT("yyyy'-'MM'-'dd");
//! The default timestamp time format.
const tstring ValueFormatter::DEFAULT_TIME_FORMAT = TXT("hh':'mm':'ss");
////////////////////////////////////////////////////////////////////////////////
//! Full constructor.
ValueFormatter::ValueFormatter(const tstring& valueFormat,
bool trimValue,
const tstring& dateFormat,
const tstring& timeFormat)
: m_valueFormat(valueFormat)
, m_trimValue(trimValue)
, m_dateFormat(dateFormat)
, m_timeFormat(timeFormat)
{
}
////////////////////////////////////////////////////////////////////////////////
//! Destructor.
ValueFormatter::~ValueFormatter()
{
}
////////////////////////////////////////////////////////////////////////////////
//! Format the value using the configured style.
static tstring formatTimestamp(const tstring& dateFormat, const tstring& timeFormat)
{
SYSTEMTIME now = { 0 };
::GetLocalTime(&now);
tstring date;
if (!dateFormat.empty())
{
size_t length = ::GetDateFormat(LOCALE_USER_DEFAULT, 0, &now, dateFormat.c_str(), nullptr, 0);
tchar* buffer = static_cast<tchar*>(alloca(Core::numBytes<tchar>(length)));
int result = ::GetDateFormat(LOCALE_USER_DEFAULT, 0, &now, dateFormat.c_str(), buffer, static_cast<int>(length));
if (result == 0)
throw new WCL::Win32Exception(TXT("Failed to format date"));
date = buffer;
}
tstring time;
if (!timeFormat.empty())
{
size_t length = ::GetTimeFormat(LOCALE_USER_DEFAULT, 0, &now, timeFormat.c_str(), nullptr, 0);
tchar* buffer = static_cast<tchar*>(alloca(Core::numBytes<tchar>(length)));
int result = ::GetTimeFormat(LOCALE_USER_DEFAULT, 0, &now, timeFormat.c_str(), buffer, static_cast<int>(length));
if (result == 0)
throw new WCL::Win32Exception(TXT("Failed to format time"));
time = buffer;
}
if (date.empty())
return time;
if (time.empty())
return date;
return date + TXT(" ") + time;
}
////////////////////////////////////////////////////////////////////////////////
//! Format the value using the configured style.
tstring ValueFormatter::format(const tstring& server,
const tstring& topic,
const tstring& item,
const tstring& value) const
{
typedef tstring::const_iterator citer;
tstring result;
result.reserve(m_valueFormat.length() + item.length() + value.length());
for (citer it = m_valueFormat.begin(); it != m_valueFormat.end(); ++it)
{
if (*it == TXT('%'))
{
citer variableIt = it+1;
if (variableIt == m_valueFormat.end())
throw Core::ParseException(Core::fmt(TXT("Invalid output format: '%s'"), m_valueFormat.c_str()));
const tchar variable = *variableIt;
if (variable == TXT('%'))
{
result += TXT('%');
}
else if (variable == TXT('v'))
{
if (m_trimValue)
result += Core::trimCopy(value);
else
result += value;
}
else if (variable == TXT('s'))
{
result += server;
}
else if (variable == TXT('t'))
{
result += topic;
}
else if (variable == TXT('i'))
{
result += item;
}
else if (variable == TXT('d'))
{
result += formatTimestamp(m_dateFormat, m_timeFormat);
}
else
{
throw Core::ParseException(Core::fmt(TXT("Invalid output variable: '%%%c'"), variable));
}
++it;
}
else
{
result += *it;
}
}
return result;
}