Subversion-Projekte lars-tiefland.prado

<?php

/**

 * DateFormat class file.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the BSD License.

 *

 * Copyright(c) 2004 by Qiang Xue. All rights reserved.

 *

 * To contact the author write to {@link mailto:qiang.xue@gmail.com Qiang Xue}

 * The latest version of PRADO can be obtained from:

 * {@link http://prado.sourceforge.net/}

 *

 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>

 * @version $Revision: 1.8 $  $Date: 2005/12/15 07:14:49 $

 * @package System.I18N.core

 */

/**

 * Get the DateTimeFormatInfo class.

 */

require_once(dirname(__FILE__).'/DateTimeFormatInfo.php');

/**

 * Get the encoding utilities

 */

require_once(dirname(__FILE__).'/util.php');

/**

 * DateFormat class.

 *

 * The DateFormat class allows you to format dates and times with

 * predefined styles in a locale-sensitive manner. Formatting times

 * with the DateFormat class is similar to formatting dates.

 *

 * Formatting dates with the DateFormat class is a two-step process.

 * First, you create a formatter with the getDateInstance method.

 * Second, you invoke the format method, which returns a string containing

 * the formatted date.

 *

 * DateTime values are formatted using standard or custom patterns stored

 * in the properties of a DateTimeFormatInfo.

 *

 * @author Xiang Wei Zhuo <weizhuo[at]gmail[dot]com>

 * @version v1.0, last update on Sat Dec 04 14:10:49 EST 2004

 * @package System.I18N.core

 */

class DateFormat

{

	/**

	 * A list of tokens and their function call.

	 * @var array

	 */

	protected $tokens = array(

			'G'=>'Era',

			'y'=>'Year',

			'M'=>'Month',

			'd'=>'Day',

			'h'=>'Hour12',

			'H'=>'Hour24',

			'm'=>'Minutes',

			's'=>'Seconds',

			'E'=>'DayInWeek',

			'D'=>'DayInYear',

			'F'=>'DayInMonth',

			'w'=>'WeekInYear',

			'W'=>'WeekInMonth',

			'a'=>'AMPM',

			'k'=>'HourInDay',

			'K'=>'HourInAMPM',

			'z'=>'TimeZone'

			);

	/**

	 * A list of methods, to be used by the token function calls.

	 * @var array

	 */

	protected $methods = array();

	/**

	 * The DateTimeFormatInfo, containing culture specific patterns and names.

 	 * @var DateTimeFormatInfo

	 */

	protected $formatInfo;

	/**

	 * Initialize a new DateFormat.

	 * @param mixed either, null, a CultureInfo instance,

	 * a DateTimeFormatInfo instance, or a locale.

	 * @return DateFormat instance

	 */

	function __construct($formatInfo=null)

	{

		if($formatInfo === null)

			$this->formatInfo = DateTimeFormatInfo::getInvariantInfo();

		else if($formatInfo instanceof CultureInfo)

			$this->formatInfo = $formatInfo->DateTimeFormat;

		else if($formatInfo instanceof DateTimeFormatInfo)

			$this->formatInfo = $formatInfo;

		else

			$this->formatInfo = DateTimeFormatInfo::getInstance($formatInfo);

		$this->methods = get_class_methods($this);

	}

	/**

	 * Format a date according to the pattern.

	 * @param mixed the time as integer or string in strtotime format.

	 * @return string formatted date time.

	 */

	public function format($time, $pattern='F', $charset='UTF-8')

	{

		if (is_numeric($time)) //assumes unix epoch

			$time = floatval($time);

		else if(is_string($time))

			$time = @strtotime($time);

		if($pattern === null)

			$pattern = 'F';

		$s = Prado::createComponent('System.Util.TDateTimeStamp');

		$date = $s->getDate($time);

		$pattern = $this->getPattern($pattern);

		$tokens = $this->getTokens($pattern);

		for($i = 0, $k = count($tokens); $i<$k; ++$i)

		{

			$pattern = $tokens[$i];

			if($pattern{0} == "'"

				&& $pattern{strlen($pattern)-1} == "'")

			{

				$sub = preg_replace('/(^\')|(\'$)/','',$pattern);

				$tokens[$i] =  str_replace('``````','\'',$sub);

			}

			else if($pattern == '``````')

			{

				$tokens[$i] = '\'';

			}

			else

			{

				$function = $this->getFunctionName($pattern);

				if($function != null)

				{

					$fName = 'get'.$function;

					if(in_array($fName, $this->methods))

					{

						$rs = $this->$fName($date, $pattern);

						$tokens[$i] = $rs;

					}

					else

						throw new

						Exception('function '.$function.' not found.');

				}

			}

		}

		return I18N_toEncoding(implode('',$tokens), $charset);

	}

	/**

	 * For a particular token, get the corresponding function to call.

	 * @param string token

	 * @return mixed the function if good token, null otherwise.

	 */

	protected function getFunctionName($token)

	{

		if(isset($this->tokens[$token{0}]))

			return $this->tokens[$token{0}];

	}

	/**

	 * Get the pattern from DateTimeFormatInfo or some predefined patterns.

	 * If the $pattern parameter is an array of 2 element, it will assume

	 * that the first element is the date, and second the time

	 * and try to find an appropriate pattern and apply

	 * DateTimeFormatInfo::formatDateTime

	 * See the tutorial documentation for futher details on the patterns.

	 * @param mixed a pattern.

	 * @return string a pattern.

	 * @see DateTimeFormatInfo::formatDateTime()

	 */

	protected function getPattern($pattern)

	{

		if(is_array($pattern) && count($pattern) == 2)

		{

			return $this->formatInfo->formatDateTime(

							$this->getPattern($pattern[0]),

							$this->getPattern($pattern[1]));

		}

		switch($pattern)

		{

			case 'd':

				return $this->formatInfo->ShortDatePattern;

				break;

			case 'D':

				return $this->formatInfo->LongDatePattern;

				break;

			case 'p':

				return $this->formatInfo->MediumDatePattern;

				break;

			case 'P':

				return $this->formatInfo->FullDatePattern;

				break;

			case 't':

				return $this->formatInfo->ShortTimePattern;

				break;

			case 'T':

				return $this->formatInfo->LongTimePattern;

				break;

			case 'q':

				return $this->formatInfo->MediumTimePattern;

				break;

			case 'Q':

				return $this->formatInfo->FullTimePattern;

				break;

			case 'f':

				return $this->formatInfo->formatDateTime(

					$this->formatInfo->LongDatePattern,

					$this->formatInfo->ShortTimePattern);

				break;

			case 'F':

				return $this->formatInfo->formatDateTime(

					$this->formatInfo->LongDatePattern,

					$this->formatInfo->LongTimePattern);

				break;

			case 'g':

				return $this->formatInfo->formatDateTime(

					$this->formatInfo->ShortDatePattern,

					$this->formatInfo->ShortTimePattern);

				break;

			case 'G':

				return $this->formatInfo->formatDateTime(

					$this->formatInfo->ShortDatePattern,

					$this->formatInfo->LongTimePattern);

				break;

			case 'M':

			case 'm':

				return 'MMMM dd';

				break;

			case 'R':

			case 'r':

				return 'EEE, dd MMM yyyy HH:mm:ss';

				break;

			case 's':

				return 'yyyy-MM-ddTHH:mm:ss';

				break;

			case 'u':

				return 'yyyy-MM-dd HH:mm:ss z';

				break;

			case 'U':

				return 'EEEE dd MMMM yyyy HH:mm:ss';

				break;

			case 'Y':

			case 'y':

				return 'yyyy MMMM';

				break;

			default :

				return $pattern;

		}

	}

	/**

	 * Tokenize the pattern. The tokens are delimited by group of

	 * similar characters, e.g. 'aabb' will form 2 tokens of 'aa' and 'bb'.

	 * Any substrings, starting and ending with a single quote (')

	 * will be treated as a single token.

	 * @param string pattern.

	 * @return array string tokens in an array.

	 */

	protected function getTokens($pattern)

	{

		$char = null;

		$tokens = array();

		$token = null;

		$text = false;

		$pattern = preg_replace("/''/", '``````', $pattern);

		for($i = 0; $i < strlen($pattern); $i++)

		{

			if($char==null || $pattern{$i} == $char || $text)

			{

				$token .= $pattern{$i};

			}

			else

			{

				$tokens[] = str_replace("","'",$token);

				$token = $pattern{$i};

			}

			if($pattern{$i} == "'" && $text == false)

				$text = true;

			else if($text && $pattern{$i} == "'" && $char == "'")

				$text = true;

			else if($text && $char != "'" && $pattern{$i} == "'")

				$text = false;

			$char = $pattern{$i};

		}

		$tokens[] = $token;

		return $tokens;

	}

	/**

	 * Get the year.

 	 * "yy" will return the last two digits of year.

 	 * "yyyy" will return the full integer year.

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return string year

	 */

	protected function getYear($date, $pattern='yyyy')

	{

		$year = $date['year'];

		switch($pattern)

		{

			case 'yy':

				return substr($year,2);

			case 'yyyy':

				return $year;

			default:

				throw new Exception('The pattern for year is either "yy" or "yyyy".');

		}

	}

	/**

	 * Get the month.

 	 * "M" will return integer 1 through 12

 	 * "MM" will return the narrow month name, e.g. "J"

 	 * "MMM" will return the abrreviated month name, e.g. "Jan"

 	 * "MMMM" will return the month name, e.g. "January"

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return string month name

	 */

	protected function getMonth($date, $pattern='M')

	{

		$month = $date['mon'];

		switch($pattern)

		{

			case 'M':

				return $month;

			case 'MM':

				return str_pad($month, 2,'0',STR_PAD_LEFT);

			case 'MMM':

				return $this->formatInfo->AbbreviatedMonthNames[$month-1];

				break;

			case 'MMMM':

				return $this->formatInfo->MonthNames[$month-1];

			default:

				throw new Exception('The pattern for month '.

						'is "M", "MM", "MMM", or "MMMM".');

		}

	}

	/**

	 * Get the day of the week.

 	 * "E" will return integer 0 (for Sunday) through 6 (for Saturday).

 	 * "EE" will return the narrow day of the week, e.g. "M"

 	 * "EEE" will return the abrreviated day of the week, e.g. "Mon"

 	 * "EEEE" will return the day of the week, e.g. "Monday"

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return string day of the week.

	 */

	protected function getDayInWeek($date, $pattern='EEEE')

	{

		$day = $date['wday'];

		switch($pattern)

		{

			case 'E':

				return $day;

				break;

			case 'EE':

				return $this->formatInfo->NarrowDayNames[$day];

			case 'EEE':

				return $this->formatInfo->AbbreviatedDayNames[$day];

				break;

			case 'EEEE':

				return $this->formatInfo->DayNames[$day];

				break;

			default:

				throw new Exception('The pattern for day of the week '.

						'is "E", "EE", "EEE", or "EEEE".');

		}

	}

	/**

	 * Get the day of the month.

 	 * "d" for non-padding, "dd" will always return 2 characters.

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return string day of the month

	 */

	protected function getDay($date, $pattern='d')

	{

		$day = $date['mday'];

		switch($pattern)

		{

			case 'd':

				return $day;

			case 'dd':

				return str_pad($day, 2,'0',STR_PAD_LEFT);

			default:

				throw new Exception('The pattern for day of '.

						'the month is "d" or "dd".');

		}

	}

	/**

	 * Get the era. i.e. in gregorian, year > 0 is AD, else BC.

	 * @todo How to support multiple Eras?, e.g. Japanese.

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return string era

	 */

	protected function getEra($date, $pattern='G')

	{

		if($pattern != 'G')

			throw new Exception('The pattern for era is "G".');

		$year = $date['year'];

		if($year > 0)

			return $this->formatInfo->getEra(1);

		else

			return $this->formatInfo->getEra(0);

	}

	/**

	 * Get the hours in 24 hour format, i.e. [0-23].

	 * "H" for non-padding, "HH" will always return 2 characters.

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return string hours in 24 hour format.

	 */

	protected function getHour24($date, $pattern='H')

	{

		$hour = $date['hours'];

		switch($pattern)

		{

			case 'H':

				return $hour;

			case 'HH':

				return str_pad($hour, 2,'0',STR_PAD_LEFT);

			default:

				throw new Exception('The pattern for 24 hour '.

						'format is "H" or "HH".');

		}

	}

	/**

	 * Get the AM/PM designator, 12 noon is PM, 12 midnight is AM.

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return string AM or PM designator

	 */

	protected function getAMPM($date, $pattern='a')

	{

		if($pattern != 'a')

			throw new Exception('The pattern for AM/PM marker is "a".');

		$hour = $date['hours'];

		$ampm = (int)($hour/12);

		return $this->formatInfo->AMPMMarkers[$ampm];

	}

	/**

	 * Get the hours in 12 hour format.

	 * "h" for non-padding, "hh" will always return 2 characters.

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return string hours in 12 hour format.

	 */

	protected function getHour12($date, $pattern='h')

	{

		$hour = $date['hours'];

		$hour = ($hour==12|$hour==0)?12:($hour)%12;

		switch($pattern)

		{

			case 'h':

				return $hour;

			case 'hh':

				return str_pad($hour, 2,'0',STR_PAD_LEFT);

			default:

				throw new Exception('The pattern for 24 hour '.

						'format is "H" or "HH".');

		}

	}

	/**

	 * Get the minutes.

	 * "m" for non-padding, "mm" will always return 2 characters.

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return string minutes.

	 */

	protected function getMinutes($date, $pattern='m')

	{

		$minutes = $date['minutes'];

		switch($pattern)

		{

			case 'm':

				return $minutes;

			case 'mm':

				return str_pad($minutes, 2,'0',STR_PAD_LEFT);

			default:

			throw new Exception('The pattern for minutes is "m" or "mm".');

		}

	}

	/**

	 * Get the seconds.

	 * "s" for non-padding, "ss" will always return 2 characters.

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return string seconds

	 */

	protected function getSeconds($date, $pattern='s')

	{

		$seconds = $date['seconds'];

		switch($pattern)

		{

			case 's':

				return $seconds;

			case 'ss':

				return str_pad($seconds, 2,'0',STR_PAD_LEFT);

			default:

			throw new Exception('The pattern for seconds is "s" or "ss".');

		}

	}

	/**

	 * Get the timezone from the server machine.

	 * @todo How to get the timezone for a different region?

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return string time zone

	 */

	protected function getTimeZone($date, $pattern='z')

	{

		if($pattern != 'z')

			throw new Exception('The pattern for time zone is "z".');

		return @date('T', @mktime($date['hours'], $date['minutes'], $date['seconds'], $date['mon'], $date['mday'], $date['year']));

	}

	/**

	 * Get the day in the year, e.g. [1-366]

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return int hours in AM/PM format.

	 */

	protected function getDayInYear($date, $pattern='D')

	{

		if($pattern != 'D')

			throw new Exception('The pattern for day in year is "D".');

		return $date['yday'];

	}

	/**

	 * Get day in the month.

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return int day in month

	 */

	protected function getDayInMonth($date, $pattern='FF')

	{

		switch ($pattern) {

		    case 'F':

		      return @date('j', @mktime(0, 0, 0, $date['mon'], $date['mday'], $date['year']));

		      break;

		    case 'FF':

		      return @date('d', @mktime(0, 0, 0, $date['mon'], $date['mday'], $date['year']));

		      break;

		    default:

		      throw new Exception('The pattern for day in month is "F" or "FF".');

		}

	}

	/**

	 * Get the week in the year.

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return int week in year

	 */

	protected function getWeekInYear($date, $pattern='w')

	{

		if($pattern != 'w')

			throw new Exception('The pattern for week in year is "w".');

		return @date('W', @mktime(0, 0, 0, $date['mon'], $date['mday'], $date['year']));

	}

	/**

	 * Get week in the month.

	 * @param array getdate format.

	 * @return int week in month

	 */

	protected function getWeekInMonth($date, $pattern='W')

	{

		if($pattern != 'W')

			throw new Exception('The pattern for week in month is "W".');

		return @date('W', @mktime(0, 0, 0, $date['mon'], $date['mday'], $date['year'])) - date('W', mktime(0, 0, 0, $date['mon'], 1, $date['year']));

	}

	/**

	 * Get the hours [1-24].

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return int hours [1-24]

	 */

	protected function getHourInDay($date, $pattern='k')

	{

		if($pattern != 'k')

			throw new Exception('The pattern for hour in day is "k".');

		return $date['hours']+1;

	}

	/**

	 * Get the hours in AM/PM format, e.g [1-12]

	 * @param array getdate format.

	 * @param string a pattern.

	 * @return int hours in AM/PM format.

	 */

	protected function getHourInAMPM($date, $pattern='K')

	{

		if($pattern != 'K')

			throw new Exception('The pattern for hour in AM/PM is "K".');

		return ($date['hours']+1)%12;

	}

}

?>