/*
 * Copyright 2015 (c) Anna Schumaker.
 */
#include <core/date.h>
#include <core/string.h>
#include <endian.h>
#include <time.h>


void date_set(struct date *date, unsigned int year,
	      unsigned int month, unsigned int day)
{
	if (date) {
		date->d_year  = year;
		date->d_month = month;
		date->d_day   = day;
	}
}

void date_today(struct date *date)
{
	time_t rawtime = time(NULL);
	struct tm *now = localtime(&rawtime);
	date_set(date, now->tm_year + 1900, now->tm_mon + 1, now->tm_mday);
}

void date_read(struct file *f, struct date *date)
{
	date->d_year  = file_readu(f);
	date->d_month = file_readu(f);
	date->d_day   = file_readu(f);
}

void date_read_stamp(struct file *f, struct date *date)
{
	date->d_stamp = be32toh(file_readu(f));
}

void date_write(struct file *f, struct date *date)
{
	file_writef(f, "%u %u %u", date->d_year, date->d_month, date->d_day);
}

void date_write_stamp(struct file *f, struct date *date)
{
	file_writef(f, "%u", htobe32(date->d_stamp));
}

gchar *date_string(const struct date *date)
{
	struct tm tm = {
		.tm_year = date->d_year  - 1900,
		.tm_mon  = date->d_month - 1,
		.tm_mday = date->d_day,
	};
	return string_tm2str(&tm);
}

int date_compare(const struct date *lhs, const struct date *rhs)
{
	int ret = lhs->d_year - rhs->d_year;
	if (ret != 0)
		return ret;
	ret = lhs->d_month - rhs->d_month;
	if (ret != 0)
		return ret;
	return lhs->d_day - rhs->d_day;
}