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<?php |
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/* vim: set expandtab tabstop=4 shiftwidth=4: */ |
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/** |
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* Contains the Calendar_Engine_PearDate class |
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* |
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* PHP versions 4 and 5 |
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* |
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* LICENSE: Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY |
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* @category Date and Time |
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* @package Calendar |
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* @author Lorenzo Alberton <[email protected]> |
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* @copyright 2003-2007 Lorenzo Alberton |
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* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause) |
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* @version CVS: $Id$ |
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* @link http://pear.php.net/package/Calendar |
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*/ |
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namespace Pear\Calendar\Engine; |
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/** |
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* Performs calendar calculations based on the PEAR::Date class |
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* Timestamps are in the ISO-8601 format (YYYY-MM-DD HH:MM:SS) |
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* |
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* @category Date and Time |
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* @package Calendar |
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* @author Lorenzo Alberton <[email protected]> |
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* @copyright 2003-2007 Lorenzo Alberton |
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* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause) |
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* @link http://pear.php.net/package/Calendar |
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* @access protected |
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*/ |
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class PearDate /* implements Calendar_Engine_Interface */ |
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{ |
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/** |
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* Makes sure a given timestamp is only ever parsed once |
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* Uses a static variable to prevent date() being used twice |
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* for a date which is already known |
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* |
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* @param mixed $stamp Any timestamp format recognized by Pear::Date |
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* |
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* @return object Pear::Date object |
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* @access protected |
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*/ |
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function stampCollection($stamp) |
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{ |
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static $stamps = array(); |
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if (!isset($stamps[$stamp])) { |
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$stamps[$stamp] = new Date($stamp); |
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} |
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return $stamps[$stamp]; |
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} |
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/** |
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* Returns a numeric year given a iso-8601 datetime |
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* |
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* @param string $stamp iso-8601 datetime (YYYY-MM-DD HH:MM:SS) |
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* |
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* @return int year (e.g. 2003) |
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* @access protected |
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*/ |
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function stampToYear($stamp) |
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{ |
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$date = PearDate::stampCollection($stamp); |
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return (int)$date->year; |
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} |
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/** |
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* Returns a numeric month given a iso-8601 datetime |
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* |
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* @param string $stamp iso-8601 datetime (YYYY-MM-DD HH:MM:SS) |
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* |
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* @return int month (e.g. 9) |
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* @access protected |
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*/ |
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function stampToMonth($stamp) |
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{ |
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$date = PearDate::stampCollection($stamp); |
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return (int)$date->month; |
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} |
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/** |
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* Returns a numeric day given a iso-8601 datetime |
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* |
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* @param string $stamp iso-8601 datetime (YYYY-MM-DD HH:MM:SS) |
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* |
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* @return int day (e.g. 15) |
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* @access protected |
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*/ |
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function stampToDay($stamp) |
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{ |
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$date = PearDate::stampCollection($stamp); |
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return (int)$date->day; |
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} |
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/** |
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* Returns a numeric hour given a iso-8601 datetime |
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* |
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* @param string $stamp iso-8601 datetime (YYYY-MM-DD HH:MM:SS) |
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* |
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* @return int hour (e.g. 13) |
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* @access protected |
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*/ |
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function stampToHour($stamp) |
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{ |
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$date = PearDate::stampCollection($stamp); |
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return (int)$date->hour; |
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} |
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/** |
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* Returns a numeric minute given a iso-8601 datetime |
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* |
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* @param string $stamp iso-8601 datetime (YYYY-MM-DD HH:MM:SS) |
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* |
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* @return int minute (e.g. 34) |
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* @access protected |
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*/ |
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function stampToMinute($stamp) |
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{ |
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$date = PearDate::stampCollection($stamp); |
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return (int)$date->minute; |
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} |
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/** |
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* Returns a numeric second given a iso-8601 datetime |
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* |
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* @param string $stamp iso-8601 datetime (YYYY-MM-DD HH:MM:SS) |
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* |
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* @return int second (e.g. 51) |
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* @access protected |
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*/ |
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function stampToSecond($stamp) |
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{ |
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$date = PearDate::stampCollection($stamp); |
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return (int)$date->second; |
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} |
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/** |
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* Returns a iso-8601 datetime |
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* |
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* @param int $y year (2003) |
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* @param int $m month (9) |
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* @param int $d day (13) |
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* @param int $h hour (13) |
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* @param int $i minute (34) |
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* @param int $s second (53) |
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* |
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* @return string iso-8601 datetime |
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* @access protected |
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*/ |
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function dateToStamp($y, $m, $d, $h=0, $i=0, $s=0) |
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{ |
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$r = array(); |
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PearDate::adjustDate($y, $m, $d, $h, $i, $s); |
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$key = $y.$m.$d.$h.$i.$s; |
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if (!isset($r[$key])) { |
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$r[$key] = sprintf("%04d-%02d-%02d %02d:%02d:%02d", |
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$y, $m, $d, $h, $i, $s); |
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} |
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return $r[$key]; |
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} |
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/** |
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* Set the correct date values (useful for math operations on dates) |
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* |
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* @param int &$y year (2003) |
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* @param int &$m month (9) |
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* @param int &$d day (13) |
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* @param int &$h hour (13) |
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* @param int &$i minute (34) |
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* @param int &$s second (53) |
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* |
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* @return void |
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* @access protected |
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*/ |
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function adjustDate(&$y, &$m, &$d, &$h, &$i, &$s) |
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{ |
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if ($s < 0) { |
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$m -= floor($s / 60); |
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$s = -$s % 60; |
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} |
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if ($s > 60) { |
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$m += floor($s / 60); |
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$s %= 60; |
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} |
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if ($i < 0) { |
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$h -= floor($i / 60); |
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$i = -$i % 60; |
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} |
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if ($i > 60) { |
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$h += floor($i / 60); |
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$i %= 60; |
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} |
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if ($h < 0) { |
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$d -= floor($h / 24); |
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$h = -$h % 24; |
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} |
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if ($h > 24) { |
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$d += floor($h / 24); |
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$h %= 24; |
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} |
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for(; $m < 1; $y--, $m+=12); |
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for(; $m > 12; $y++, $m-=12); |
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while ($d < 1) { |
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if ($m > 1) { |
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$m--; |
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} else { |
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$m = 12; |
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$y--; |
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} |
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$d += Date_Calc::daysInMonth($m, $y); |
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} |
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for ($max_days = Date_Calc::daysInMonth($m, $y); $d > $max_days; ) { |
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$d -= $max_days; |
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if ($m < 12) { |
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$m++; |
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} else { |
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$m = 1; |
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$y++; |
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} |
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} |
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} |
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/** |
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* The upper limit on years that the Calendar Engine can work with |
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* |
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* @return int 9999 |
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* @access protected |
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*/ |
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function getMaxYears() |
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{ |
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return 9999; |
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} |
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/** |
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* The lower limit on years that the Calendar Engine can work with |
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* |
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* @return int 0 |
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* @access protected |
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*/ |
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function getMinYears() |
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{ |
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return 0; |
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} |
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/** |
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* Returns the number of months in a year |
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* |
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* @param int $y year |
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* |
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* @return int (12) |
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* @access protected |
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*/ |
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function getMonthsInYear($y=null) |
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{ |
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return 12; |
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} |
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/** |
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* Returns the number of days in a month, given year and month |
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* |
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* @param int $y year (2003) |
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* @param int $m month (9) |
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* |
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* @return int days in month |
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* @access protected |
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*/ |
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function getDaysInMonth($y, $m) |
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{ |
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return (int)Date_Calc::daysInMonth($m, $y); |
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} |
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/** |
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* Returns numeric representation of the day of the week in a month, |
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* given year and month |
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* |
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* @param int $y year (2003) |
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* @param int $m month (9) |
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* |
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* @return int from 0 to 7 |
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* @access protected |
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*/ |
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function getFirstDayInMonth($y, $m) |
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{ |
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return (int)Date_Calc::dayOfWeek(1, $m, $y); |
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} |
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/** |
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* Returns the number of days in a week |
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* |
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* @param int $y year (2003) |
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* @param int $m month (9) |
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* @param int $d day (4) |
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* |
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* @return int (7) |
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* @access protected |
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*/ |
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function getDaysInWeek($y=null, $m=null, $d=null) |
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{ |
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return 7; |
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} |
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/** |
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* Returns the number of the week in the year (ISO-8601), given a date |
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* |
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* @param int $y year (2003) |
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* @param int $m month (9) |
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* @param int $d day (4) |
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* |
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* @return int week number |
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* @access protected |
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*/ |
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function getWeekNInYear($y, $m, $d) |
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{ |
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//return Date_Calc::weekOfYear($d, $m, $y); //beware, Date_Calc doesn't follow ISO-8601 standard! |
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list($nYear, $nWeek) = Date_Calc::weekOfYear4th($d, $m, $y); |
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return $nWeek; |
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} |
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/** |
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* Returns the number of the week in the month, given a date |
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* |
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* @param int $y year (2003) |
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* @param int $m month (9) |
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* @param int $d day (4) |
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* @param int $firstDay first day of the week (default: monday) |
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* |
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* @return int week number |
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* @access protected |
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*/ |
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function getWeekNInMonth($y, $m, $d, $firstDay=1) |
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{ |
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$weekEnd = ($firstDay == 0) ? $this->getDaysInWeek()-1 : $firstDay-1; |
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$end_of_week = (int)Date_Calc::nextDayOfWeek($weekEnd, 1, $m, $y, '%e', true); |
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$w = 1; |
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while ($d > $end_of_week) { |
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++$w; |
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$end_of_week += $this->getDaysInWeek(); |
359
|
|
|
} |
360
|
|
|
return $w; |
361
|
|
|
} |
362
|
|
|
|
363
|
|
|
/** |
364
|
|
|
* Returns the number of weeks in the month |
365
|
|
|
* |
366
|
|
|
* @param int $y year (2003) |
367
|
|
|
* @param int $m month (9) |
368
|
|
|
* @param int $firstDay first day of the week (default: monday) |
369
|
|
|
* |
370
|
|
|
* @return int weeks number |
371
|
|
|
* @access protected |
372
|
|
|
*/ |
373
|
|
|
function getWeeksInMonth($y, $m, $firstDay=1) |
|
|
|
|
374
|
|
|
{ |
375
|
|
|
$FDOM = Date_Calc::firstOfMonthWeekday($m, $y); |
376
|
|
|
if ($FDOM == 0) { |
377
|
|
|
$FDOM = $this->getDaysInWeek(); |
378
|
|
|
} |
379
|
|
|
if ($FDOM > $firstDay) { |
380
|
|
|
$daysInTheFirstWeek = $this->getDaysInWeek() - $FDOM + $firstDay; |
381
|
|
|
$weeks = 1; |
382
|
|
|
} else { |
383
|
|
|
$daysInTheFirstWeek = $firstDay - $FDOM; |
384
|
|
|
$weeks = 0; |
385
|
|
|
} |
386
|
|
|
$daysInTheFirstWeek %= $this->getDaysInWeek(); |
387
|
|
|
return (int)(ceil(($this->getDaysInMonth($y, $m) - $daysInTheFirstWeek) / |
388
|
|
|
$this->getDaysInWeek()) + $weeks); |
389
|
|
|
} |
390
|
|
|
|
391
|
|
|
/** |
392
|
|
|
* Returns the number of the day of the week (0=sunday, 1=monday...) |
393
|
|
|
* |
394
|
|
|
* @param int $y year (2003) |
395
|
|
|
* @param int $m month (9) |
396
|
|
|
* @param int $d day (4) |
397
|
|
|
* |
398
|
|
|
* @return int weekday number |
399
|
|
|
* @access protected |
400
|
|
|
*/ |
401
|
|
|
function getDayOfWeek($y, $m, $d) |
|
|
|
|
402
|
|
|
{ |
403
|
|
|
return Date_Calc::dayOfWeek($d, $m, $y); |
404
|
|
|
} |
405
|
|
|
|
406
|
|
|
/** |
407
|
|
|
* Returns a list of integer days of the week beginning 0 |
408
|
|
|
* |
409
|
|
|
* @param int $y year (2003) |
410
|
|
|
* @param int $m month (9) |
411
|
|
|
* @param int $d day (4) |
412
|
|
|
* |
413
|
|
|
* @return array (0, 1, 2, 3, 4, 5, 6) 1 = Monday |
414
|
|
|
* @access protected |
415
|
|
|
*/ |
416
|
|
|
function getWeekDays($y=null, $m=null, $d=null) |
|
|
|
|
417
|
|
|
{ |
418
|
|
|
return array(0, 1, 2, 3, 4, 5, 6); |
419
|
|
|
} |
420
|
|
|
|
421
|
|
|
/** |
422
|
|
|
* Returns the default first day of the week |
423
|
|
|
* |
424
|
|
|
* @param int $y year (2003) |
425
|
|
|
* @param int $m month (9) |
426
|
|
|
* @param int $d day (4) |
427
|
|
|
* |
428
|
|
|
* @return int (default 1 = Monday) |
429
|
|
|
* @access protected |
430
|
|
|
*/ |
431
|
|
|
function getFirstDayOfWeek($y=null, $m=null, $d=null) |
|
|
|
|
432
|
|
|
{ |
433
|
|
|
return 1; |
434
|
|
|
} |
435
|
|
|
|
436
|
|
|
/** |
437
|
|
|
* Returns the number of hours in a day |
438
|
|
|
* |
439
|
|
|
* @param int $y year (2003) |
440
|
|
|
* @param int $m month (9) |
441
|
|
|
* @param int $d day (4) |
442
|
|
|
* |
443
|
|
|
* @return int (24) |
444
|
|
|
* @access protected |
445
|
|
|
*/ |
446
|
|
|
function getHoursInDay($y=null,$m=null,$d=null) |
|
|
|
|
447
|
|
|
{ |
448
|
|
|
return 24; |
449
|
|
|
} |
450
|
|
|
|
451
|
|
|
/** |
452
|
|
|
* Returns the number of minutes in an hour |
453
|
|
|
* |
454
|
|
|
* @param int $y year (2003) |
455
|
|
|
* @param int $m month (9) |
456
|
|
|
* @param int $d day (4) |
457
|
|
|
* @param int $h hour |
458
|
|
|
* |
459
|
|
|
* @return int (60) |
460
|
|
|
* @access protected |
461
|
|
|
*/ |
462
|
|
|
function getMinutesInHour($y=null,$m=null,$d=null,$h=null) |
|
|
|
|
463
|
|
|
{ |
464
|
|
|
return 60; |
465
|
|
|
} |
466
|
|
|
|
467
|
|
|
/** |
468
|
|
|
* Returns the number of seconds in a minutes |
469
|
|
|
* |
470
|
|
|
* @param int $y year (2003) |
471
|
|
|
* @param int $m month (9) |
472
|
|
|
* @param int $d day (4) |
473
|
|
|
* @param int $h hour |
474
|
|
|
* @param int $i minute |
475
|
|
|
* |
476
|
|
|
* @return int (60) |
477
|
|
|
* @access protected |
478
|
|
|
*/ |
479
|
|
|
function getSecondsInMinute($y=null,$m=null,$d=null,$h=null,$i=null) |
|
|
|
|
480
|
|
|
{ |
481
|
|
|
return 60; |
482
|
|
|
} |
483
|
|
|
|
484
|
|
|
/** |
485
|
|
|
* Checks if the given day is the current day |
486
|
|
|
* |
487
|
|
|
* @param mixed $stamp Any timestamp format recognized by Pear::Date |
488
|
|
|
* |
489
|
|
|
* @return boolean |
490
|
|
|
* @access protected |
491
|
|
|
*/ |
492
|
|
|
function isToday($stamp) |
|
|
|
|
493
|
|
|
{ |
494
|
|
|
static $today = null; |
495
|
|
|
if (is_null($today)) { |
496
|
|
|
$today = new Date(); |
497
|
|
|
} |
498
|
|
|
$date = PearDate::stampCollection($stamp); |
|
|
|
|
499
|
|
|
return ( $date->day == $today->getDay() |
500
|
|
|
&& $date->month == $today->getMonth() |
501
|
|
|
&& $date->year == $today->getYear() |
502
|
|
|
); |
503
|
|
|
} |
504
|
|
|
} |
505
|
|
|
|
Adding explicit visibility (
private
,protected
, orpublic
) is generally recommend to communicate to other developers how, and from where this method is intended to be used.