<?php
/*=====================================================================*\
|| ###################################################################
|| # Blue Static ISSO Framework
|| # Copyright (c)2005-2009 Blue Static
|| #
|| # This program is free software; you can redistribute it and/or modify
|| # it under the terms of the GNU General Public License as published by
|| # the Free Software Foundation; version 2 of the License.
|| #
|| # This program is distributed in the hope that it will be useful, but
|| # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|| # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|| # more details.
|| #
|| # You should have received a copy of the GNU General Public License along
|| # with this program; if not, write to the Free Software Foundation, Inc.,
|| # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|| ###################################################################
\*=====================================================================*/

/**
 * Date formatting system (Date.php)
 *
 * @package	ISSO
 */

/**
 * Defined constant time
 */
define('TIMENOW', time());

/**
 * Date Formatting System
 *
 * This framework wraps date and time functions into one neat little
 * package that takes care of modifying timestamps to meet the right
 * time zone
 *
 * @author		Blue Static
 * @copyright	Copyright (c)2005 - 2009, Blue Static
 * @package		ISSO
 * 
 */
class BSDate
{
	/**
	 * Offset in seconds; this is set using fetch_offset()
	 * @var	integer
	 */
	private $offset = 0;
	
	/**
	 * Sets the user time zone and then calculates the total offset
	 *
	 * @param	float	User time zone
	 */
	public function setUserTimeZone($usertz)
	{
		$this->offset = $usertz * 3600;
	}
	
	/**
	 * Formats a UNIX timestamp to a certain date format in the proper time
	 * zone
	 *
	 * @param	string	Format of the date (same as PHP's date() function)
	 * @param	integer	UNIX timestamp to format
	 * @param	bool	Adjust the date to the user's language?
	 *
	 * @return	string	Formatted date
	 */
	public function format($format, $timestamp = TIMENOW, $adjust = true)
	{
		if ($adjust)
		{
			$timestamp += $this->offset;
		}
		return gmdate($format, $timestamp);
	}
	
	/**
	 * Fetches an array of timezone names indexed by their offset
	 *
	 * @return	array	List of timezones
	 */
	public static function fetch_timezone_list()
	{
		$opt = array();
		
		$opt['-12']		= _('(GMT - 12:00) Enitwetok, Kwajalien');
		$opt['-11']		= _('(GMT - 11:00) Midway Island, Samoa');
		$opt['-10']		= _('(GMT - 10:00) Hawaii');
		$opt['-9']		= _('(GMT - 9:00) Alaska');
		$opt['-8']		= _('(GMT - 8:00) Pacific Time (US &amp; Canada)');
		$opt['-7']		= _('(GMT - 7:00) Mountain Time (US &amp; Canada)');
		$opt['-6']		= _('(GMT - 6:00) Central Time (US &amp; Canada)');
		$opt['-5']		= _('(GMT - 5:00) Eastern Time (US &amp; Canada)');
		$opt['-4']		= _('(GMT - 4:00) Atlantic Time (Canada)');
		$opt['-3.5']	= _('(GMT - 3:30) Newfoundland');
		$opt['-3']		= _('(GMT - 3:00)  Brazil, Buenos Aires, Georgetown');
		$opt['-2']		= _('(GMT - 2:00) Mid-Atlantic, St. Helena');
		$opt['-1']		= _('(GMT - 1:00) Azores, Cape Verde Islands');
		$opt['0']		= _('(GMT) London, Dublin, Casablanca');
		$opt['1']		= _('(GMT + 1:00) Berlin, Madrid, Paris');
		$opt['2']		= _('(GMT + 2:00) Kaliningrad, South Africa, Warsaws');
		$opt['3']		= _('(GMT + 3:00) Baghdad, Moscow, Nairobi');
		$opt['3.5']		= _('(GMT + 3:30) Tehran');
		$opt['4']		= _('(GMT + 4:00) Abu Dhabi, Tbilisi, Muscat');
		$opt['4.5']		= _('(GMT + 4:30) Kabul');
		$opt['5']		= _('(GMT + 5:00) Ekaterinburg, Islamabad, Tashkent');
		$opt['5.5']		= _('(GMT + 5:30) Calcutta, Madras, New Delhi');
		$opt['6']		= _('(GMT + 6:00) Almaty, Colomba, Dhakra');
		$opt['7']		= _('(GMT + 7:00) Bangkok, Hanoi, Jakarta');
		$opt['8']		= _('(GMT + 8:00) Beijing, Hong Kong, Singapore');
		$opt['9']		= _('(GMT + 9:00) Seoul, Tokyo, Yakutsk');
		$opt['9.5']		= _('(GMT + 9:30) Adelaide, Darwin');
		$opt['10']		= _('(GMT + 10:00) Guam, Papua New Guinea, Sydney');
		$opt['11']		= _('(GMT + 11:00) Magadan, New Caledonia, Solomon Islands');
		$opt['12']		= _('(GMT + 12:00) Auckland, Wellington, Fiji');
		
		return $opt;
	}
}

?>