/*

Copyright (C) 2015-present The DotCpp Authors.

This file is part of .C++, a native C++ implementation of

popular .NET class library APIs developed to facilitate

code reuse between C# and C++.

http://github.com/dotcpp/dotcpp (source)

http://dotcpp.org (documentation)

Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

*/

#include <dot/precompiled.hpp>

#include <dot/implement.hpp>

#include <dot/noda_time/local_date_time_util.hpp>

#include <dot/system/exception.hpp>

#include <dot/system/string.hpp>

namespace dot

{

dot::local_date_time local_date_time_util::parse(dot::string value)

{

boost::posix_time::time_input_facet* facet = new boost::posix_time::time_input_facet();

facet->format("%Y-%m-%d %H:%M:%S%f");

std::istringstream stream(*value);

stream.imbue(std::locale(std::locale::classic(), facet));

boost::posix_time::ptime ptime;

stream >> ptime;

// If default constructed datetime is passed, error message

if (ptime == boost::posix_time::not_a_date_time) throw dot::exception(dot::string::format(

"String representation of default constructed datetime {0} "

"passed to local_date_time.Parse(datetime) method.", value));

return ptime;

}

int64_t local_date_time_util::to_iso_long(dot::local_date_time value)

{

// local_date_time is serialized as readable ISO int64 in yyyymmddhhmmsssss format

int isoDate = value.year() * 10'000 + value.month() * 100 + value.day();

int isoTime = value.hour() * 100'00'000 + value.minute() * 100'000 + value.second() * 1000 + value.millisecond();

int64_t result = ((int64_t)isoDate) * 100'00'00'000 + (int64_t)isoTime;

return result;

}

dot::local_date_time local_date_time_util::parse_iso_long(int64_t value)

{

// Split into date and time using int64 arithmetic

int64_t isoDateLong = value / 100'00'00'000;

int64_t isoTimeLong = value - 100'00'00'000 * isoDateLong;

// Check that it will fit into Int32 range

if (isoDateLong < INT32_MIN || isoDateLong > INT32_MAX)

throw dot::exception(dot::string::format("Date portion of datetime {0} has invalid format.", value));

if (isoTimeLong < INT32_MIN || isoTimeLong > INT32_MAX)

throw dot::exception(dot::string::format("Time portion of datetime {0} has invalid format.", value));

// Convert to Int32

int isoDate = (int)isoDateLong;

int isoTime = (int)isoTimeLong;

// Extract year, month, day

int year = isoDate / 100'00;

isoDate -= year * 100'00;

int month = isoDate / 100;

isoDate -= month * 100;

int day = isoDate;

// Extract year, month, day

int hour = isoTime / 100'00'000;

isoTime -= hour * 100'00'000;

int minute = isoTime / 100'000;

isoTime -= minute * 100'000;

int second = isoTime / 1000;

isoTime -= second * 1000;

int millisecond = isoTime;

// Create local_date_time object

return dot::local_date_time(year, month, day, hour, minute, second, millisecond);

}

std::chrono::milliseconds local_date_time_util::to_std_chrono(dot::local_date_time value)

{

boost::posix_time::ptime epoch(boost::gregorian::date(1970, boost::date_time::Jan, 1));

boost::posix_time::time_duration d = (boost::posix_time::ptime)value - epoch;

return std::chrono::milliseconds(d.total_milliseconds());

}

dot::local_date_time local_date_time_util::from_std_chrono(std::chrono::milliseconds value)

{

boost::posix_time::ptime epoch(boost::gregorian::date(1970, boost::date_time::Jan, 1));

boost::posix_time::time_duration d = boost::posix_time::milliseconds(value.count());

return epoch + d;

}

}