//
//  NSDate+ISO8601.m
//  OCWebDAVClient
//
//  This class is based in https://github.com/zwaldowski/DZWebDAVClient. Copyright (c) 2012 Zachary Waldowski, Troy Brant, Marcus Rohrmoser, and Sam Soffes.
//
// Copyright (C) 2016, ownCloud GmbH. ( http://www.owncloud.org/ )
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//


#import "NSDate+ISO8601.h"
#include <time.h>

@implementation NSDate (ISO8601)

+ (NSDate *)dateFromISO8601String:(NSString *)value {
	if (!value.length)
		return nil;
	
	struct tm tm;
	strptime(value.UTF8String, "%Y-%m-%dT%H:%M:%S%z", &tm);
	time_t t = mktime(&tm);
	
	return [NSDate dateWithTimeIntervalSince1970:t + [[NSTimeZone localTimeZone] secondsFromGMT]];
}


- (NSString *)ISO8601String {
	struct tm *timeinfo;
	char buffer[80];
	
	time_t rawtime = (time_t)[self timeIntervalSince1970];
	timeinfo = gmtime(&rawtime);
	
	strftime(buffer, 80, "%Y-%m-%dT%H:%M:%SZ", timeinfo);
	
	return [NSString stringWithCString:buffer encoding:NSUTF8StringEncoding];
}


@end