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10 jpm 1 
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4: */
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//
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// +----------------------------------------------------------------------+
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// | PHP Version 4                                                        |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2002 The PHP Group                                |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.02 of the PHP license,      |
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// | that is bundled with this package in the file LICENSE, and is        |
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// | available at through the world-wide-web at                           |
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// | http://www.php.net/license/3_0.txt.                                  |
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// | If you did not receive a copy of the PHP license and are unable to   |
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// | obtain it through the world-wide-web, please send a note to          |
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// | license@php.net so we can mail you a copy immediately.               |
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// +----------------------------------------------------------------------+
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// | Authors: Lorenzo Alberton <l dot alberton at quipo dot it>           |
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// +----------------------------------------------------------------------+
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//
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// $Id: PearDate.php,v 1.8 2004/08/20 20:00:55 quipo Exp $
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//
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/**
23 
 * @package Calendar
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 * @version $Id: PearDate.php,v 1.8 2004/08/20 20:00:55 quipo Exp $
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 */
26 
/**
27 
 * Load PEAR::Date class
28 
 */
29 
require_once 'Date.php';
30 
 
31 
/**
32 
 * 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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 * @package Calendar
35 
 * @access protected
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 */
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class Calendar_Engine_PearDate /* implements Calendar_Engine_Interface */
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{
39 
    /**
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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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     * @param mixed Any timestamp format recognized by Pear::Date
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     * @return object Pear::Date object
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     * @access protected
46 
     */
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    function stampCollection($stamp)
48 
    {
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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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56 
    /**
57 
     * Returns a numeric year given a iso-8601 datetime
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     * @param string iso-8601 datetime (YYYY-MM-DD HH:MM:SS)
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     * @return int year (e.g. 2003)
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     * @access protected
61 
     */
62 
    function stampToYear($stamp)
63 
    {
64 
        $date = Calendar_Engine_PearDate::stampCollection($stamp);
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        return (int)$date->year;
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    }
67 
 
68 
    /**
69 
     * Returns a numeric month given a iso-8601 datetime
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     * @param string iso-8601 datetime (YYYY-MM-DD HH:MM:SS)
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     * @return int month (e.g. 9)
72 
     * @access protected
73 
     */
74 
    function stampToMonth($stamp)
75 
    {
76 
        $date = Calendar_Engine_PearDate::stampCollection($stamp);
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        return (int)$date->month;
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    }
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80 
    /**
81 
     * Returns a numeric day given a iso-8601 datetime
82 
     * @param string iso-8601 datetime (YYYY-MM-DD HH:MM:SS)
83 
     * @return int day (e.g. 15)
84 
     * @access protected
85 
     */
86 
    function stampToDay($stamp)
87 
    {
88 
        $date = Calendar_Engine_PearDate::stampCollection($stamp);
89 
        return (int)$date->day;
90 
    }
91 
 
92 
    /**
93 
     * Returns a numeric hour given a iso-8601 datetime
94 
     * @param string iso-8601 datetime (YYYY-MM-DD HH:MM:SS)
95 
     * @return int hour (e.g. 13)
96 
     * @access protected
97 
     */
98 
    function stampToHour($stamp)
99 
    {
100 
        $date = Calendar_Engine_PearDate::stampCollection($stamp);
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        return (int)$date->hour;
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    }
103 
 
104 
    /**
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     * Returns a numeric minute given a iso-8601 datetime
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     * @param string iso-8601 datetime (YYYY-MM-DD HH:MM:SS)
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     * @return int minute (e.g. 34)
108 
     * @access protected
109 
     */
110 
    function stampToMinute($stamp)
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    {
112 
        $date = Calendar_Engine_PearDate::stampCollection($stamp);
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        return (int)$date->minute;
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    }
115 
 
116 
    /**
117 
     * Returns a numeric second given a iso-8601 datetime
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     * @param string iso-8601 datetime (YYYY-MM-DD HH:MM:SS)
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     * @return int second (e.g. 51)
120 
     * @access protected
121 
     */
122 
    function stampToSecond($stamp)
123 
    {
124 
        $date = Calendar_Engine_PearDate::stampCollection($stamp);
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        return (int)$date->second;
126 
    }
127 
 
128 
    /**
129 
     * Returns a iso-8601 datetime
130 
     * @param int year (2003)
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     * @param int month (9)
132 
     * @param int day (13)
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     * @param int hour (13)
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     * @param int minute (34)
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     * @param int second (53)
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     * @return string iso-8601 datetime
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     * @access protected
138 
     */
139 
    function dateToStamp($y, $m, $d, $h=0, $i=0, $s=0)
140 
    {
141 
        $r = array();
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        Calendar_Engine_PearDate::adjustDate($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])) {
145 
            $r[$key] = sprintf("%04d-%02d-%02d %02d:%02d:%02d",
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                                $y, $m, $d, $h, $i, $s);
147 
        }
148 
        return $r[$key];
149 
    }
150 
 
151 
    /**
152 
     * Set the correct date values (useful for math operations on dates)
153 
     * @param int year   (2003)
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     * @param int month  (9)
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     * @param int day    (13)
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     * @param int hour   (13)
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     * @param int minute (34)
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     * @param int second (53)
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     * @access protected
160 
     */
161 
    function adjustDate(&$y, &$m, &$d, &$h, &$i, &$s)
162 
    {
163 
        if ($s < 0) {
164 
            $m -= floor($s / 60);
165 
            $s = -$s % 60;
166 
        }
167 
        if ($s > 60) {
168 
            $m += floor($s / 60);
169 
            $s %= 60;
170 
        }
171 
        if ($i < 0) {
172 
            $h -= floor($i / 60);
173 
            $i = -$i % 60;
174 
        }
175 
        if ($i > 60) {
176 
            $h += floor($i / 60);
177 
            $i %= 60;
178 
        }
179 
        if ($h < 0) {
180 
            $d -= floor($h / 24);
181 
            $h = -$h % 24;
182 
        }
183 
        if ($h > 24) {
184 
            $d += floor($h / 24);
185 
            $h %= 24;
186 
        }
187 
        for(; $m < 1; $y--, $m+=12);
188 
        for(; $m > 12; $y++, $m-=12);
189 
 
190 
        while ($d < 1) {
191 
            if ($m > 1) {
192 
                $m--;
193 
            } else {
194 
                $m = 12;
195 
                $y--;
196 
            }
197 
            $d += Date_Calc::daysInMonth($m, $y);
198 
        }
199 
        for ($max_days = Date_Calc::daysInMonth($m, $y); $d > $max_days; ) {
200 
            $d -= $max_days;
201 
            if ($m < 12) {
202 
                $m++;
203 
            } else {
204 
                $m = 1;
205 
                $y++;
206 
            }
207 
        }
208 
    }
209 
 
210 
    /**
211 
     * The upper limit on years that the Calendar Engine can work with
212 
     * @return int 9999
213 
     * @access protected
214 
     */
215 
    function getMaxYears()
216 
    {
217 
        return 9999;
218 
    }
219 
 
220 
    /**
221 
     * The lower limit on years that the Calendar Engine can work with
222 
     * @return int 0
223 
     * @access protected
224 
     */
225 
    function getMinYears()
226 
    {
227 
        return 0;
228 
    }
229 
 
230 
    /**
231 
     * Returns the number of months in a year
232 
     * @return int (12)
233 
     * @access protected
234 
     */
235 
    function getMonthsInYear($y=null)
236 
    {
237 
        return 12;
238 
    }
239 
 
240 
    /**
241 
     * Returns the number of days in a month, given year and month
242 
     * @param int year (2003)
243 
     * @param int month (9)
244 
     * @return int days in month
245 
     * @access protected
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     */
247 
    function getDaysInMonth($y, $m)
248 
    {
249 
        return (int)Date_Calc::daysInMonth($m, $y);
250 
    }
251 
 
252 
    /**
253 
     * Returns numeric representation of the day of the week in a month,
254 
     * given year and month
255 
     * @param int year (2003)
256 
     * @param int month (9)
257 
     * @return int from 0 to 7
258 
     * @access protected
259 
     */
260 
    function getFirstDayInMonth($y, $m)
261 
    {
262 
        return (int)Date_Calc::dayOfWeek(1, $m, $y);
263 
    }
264 
 
265 
    /**
266 
     * Returns the number of days in a week
267 
     * @param int year (2003)
268 
     * @param int month (9)
269 
     * @param int day (4)
270 
     * @return int (7)
271 
     * @access protected
272 
     */
273 
    function getDaysInWeek($y=NULL, $m=NULL, $d=NULL)
274 
    {
275 
        return 7;
276 
    }
277 
 
278 
    /**
279 
     * Returns the number of the week in the year (ISO-8601), given a date
280 
     * @param int year (2003)
281 
     * @param int month (9)
282 
     * @param int day (4)
283 
     * @return int week number
284 
     * @access protected
285 
     */
286 
    function getWeekNInYear($y, $m, $d)
287 
    {
288 
        return Date_Calc::weekOfYear($d, $m, $y); //beware, Date_Calc doesn't follow ISO-8601 standard!
289 
    }
290 
 
291 
    /**
292 
     * Returns the number of the week in the month, given a date
293 
     * @param int year (2003)
294 
     * @param int month (9)
295 
     * @param int day (4)
296 
     * @param int first day of the week (default: monday)
297 
     * @return int week number
298 
     * @access protected
299 
     */
300 
    function getWeekNInMonth($y, $m, $d, $firstDay=1)
301 
    {
302 
        $weekEnd = ($firstDay == 0) ? $this->getDaysInWeek()-1 : $firstDay-1;
303 
        $end_of_week = (int)Date_Calc::nextDayOfWeek($weekEnd, 1, $m, $y, '%e', true);
304 
        $w = 1;
305 
        while ($d > $end_of_week) {
306 
            ++$w;
307 
            $end_of_week += $this->getDaysInWeek();
308 
        }
309 
        return $w;
310 
    }
311 
 
312 
    /**
313 
     * Returns the number of weeks in the month
314 
     * @param int year (2003)
315 
     * @param int month (9)
316 
     * @param int first day of the week (default: monday)
317 
     * @return int weeks number
318 
     * @access protected
319 
     */
320 
    function getWeeksInMonth($y, $m, $firstDay=1)
321 
    {
322 
        $FDOM = Date_Calc::firstOfMonthWeekday($m, $y);
323 
        if ($FDOM == 0) {
324 
            $FDOM = $this->getDaysInWeek();
325 
        }
326 
        if ($FDOM > $firstDay) {
327 
            $daysInTheFirstWeek = $this->getDaysInWeek() - $FDOM + $firstDay;
328 
            $weeks = 1;
329 
        } else {
330 
            $daysInTheFirstWeek = $firstDay - $FDOM;
331 
            $weeks = 0;
332 
        }
333 
        $daysInTheFirstWeek %= $this->getDaysInWeek();
334 
        return (int)(ceil(($this->getDaysInMonth($y, $m) - $daysInTheFirstWeek) /
335 
                           $this->getDaysInWeek()) + $weeks);
336 
    }
337 
 
338 
    /**
339 
     * Returns the number of the day of the week (0=sunday, 1=monday...)
340 
     * @param int year (2003)
341 
     * @param int month (9)
342 
     * @param int day (4)
343 
     * @return int weekday number
344 
     * @access protected
345 
     */
346 
    function getDayOfWeek($y, $m, $d)
347 
    {
348 
        return Date_Calc::dayOfWeek($d, $m, $y);
349 
    }
350 
 
351 
    /**
352 
     * Returns a list of integer days of the week beginning 0
353 
     * @param int year (2003)
354 
     * @param int month (9)
355 
     * @param int day (4)
356 
     * @return array (0, 1, 2, 3, 4, 5, 6) 1 = Monday
357 
     * @access protected
358 
     */
359 
    function getWeekDays($y=NULL, $m=NULL, $d=NULL)
360 
    {
361 
        return array(0, 1, 2, 3, 4, 5, 6);
362 
    }
363 
 
364 
    /**
365 
     * Returns the default first day of the week
366 
     * @param int year (2003)
367 
     * @param int month (9)
368 
     * @param int day (4)
369 
     * @return int (default 1 = Monday)
370 
     * @access protected
371 
     */
372 
    function getFirstDayOfWeek($y=NULL, $m=NULL, $d=NULL)
373 
    {
374 
        return 1;
375 
    }
376 
 
377 
    /**
378 
     * Returns the number of hours in a day
379 
     * @return int (24)
380 
     * @access protected
381 
     */
382 
    function getHoursInDay($y=null,$m=null,$d=null)
383 
    {
384 
        return 24;
385 
    }
386 
 
387 
    /**
388 
     * Returns the number of minutes in an hour
389 
     * @return int (60)
390 
     * @access protected
391 
     */
392 
    function getMinutesInHour($y=null,$m=null,$d=null,$h=null)
393 
    {
394 
        return 60;
395 
    }
396 
 
397 
    /**
398 
     * Returns the number of seconds in a minutes
399 
     * @return int (60)
400 
     * @access protected
401 
     */
402 
    function getSecondsInMinute($y=null,$m=null,$d=null,$h=null,$i=null)
403 
    {
404 
        return 60;
405 
    }
406 
}
407 
?>