aboutsummaryrefslogtreecommitdiffstats
path: root/include/datetime.php
blob: 4884cda11ad5488629dc9acf11f896dca3a7e022 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
<?php /** @file */

// two-level sort for timezones.


function timezone_cmp($a, $b) {
	if(strstr($a,'/') && strstr($b,'/')) {
		if ( t($a) == t($b)) return 0;
		return ( t($a) < t($b)) ? -1 : 1;
	}
	if(strstr($a,'/')) return -1;
	if(strstr($b,'/')) return  1;
	if ( t($a) == t($b)) return 0;
	return ( t($a) < t($b)) ? -1 : 1;
}

// emit a timezone selector grouped (primarily) by continent

function select_timezone($current = 'America/Los_Angeles') {

	$timezone_identifiers = DateTimeZone::listIdentifiers();
	
	$o ='<select id="timezone_select" name="timezone">';

	usort($timezone_identifiers, 'timezone_cmp');
	$continent = '';
	foreach($timezone_identifiers as $value) {
		$ex = explode("/", $value);
		if(count($ex) > 1) {
			if($ex[0] != $continent) {
				if($continent != '')
					$o .= '</optgroup>';
				$continent = $ex[0];
				$o .= '<optgroup label="' . t($continent) . '">';
			}
			if(count($ex) > 2)
				$city = substr($value,strpos($value,'/')+1);
			else
				$city = $ex[1];
		}
		else {
			$city = $ex[0];
			if($continent != t('Miscellaneous')) {
				$o .= '</optgroup>';
				$continent = t('Miscellaneous');
				$o .= '<optgroup label="' . t($continent) . '">';	
			}
		}
		$city = str_replace('_', ' ',  t($city));
		$selected = (($value == $current) ? " selected=\"selected\" " : "");
		$o .= "<option value=\"$value\" $selected >$city</option>";
	}    
	$o .= '</optgroup></select>';
	return $o;
}

// return a select using 'field_select_raw' template, with timezones 
// groupped (primarily) by continent
// arguments follow convetion as other field_* template array:
// 'name', 'label', $value, 'help'

function field_timezone($name='timezone', $label='', $current = 'America/Los_Angeles', $help){
	$options = select_timezone($current);
	$options = str_replace('<select id="timezone_select" name="timezone">','', $options);
	$options = str_replace('</select>','', $options);
	
	$tpl = get_markup_template('field_select_raw.tpl');
	return replace_macros($tpl, array(
		'$field' => array($name, $label, $current, $help, $options),
	));
	
}

// General purpose date parse/convert function.
// $from = source timezone
// $to   = dest timezone
// $s    = some parseable date/time string
// $fmt  = output format


function datetime_convert($from = 'UTC', $to = 'UTC', $s = 'now', $fmt = "Y-m-d H:i:s") {

	// Defaults to UTC if nothing is set, but throws an exception if set to empty string.
	// Provide some sane defaults regardless.

	if($from === '')
		$from = 'UTC';
	if($to === '')
		$to = 'UTC';
	if( ($s === '') || (! is_string($s)) )
		$s = 'now';

	// Slight hackish adjustment so that 'zero' datetime actually returns what is intended
	// otherwise we end up with -0001-11-30 ...
	// add 32 days so that we at least get year 00, and then hack around the fact that 
	// months and days always start with 1. 

	if(substr($s,0,10) == '0000-00-00') {
		$d = new DateTime($s . ' + 32 days', new DateTimeZone('UTC'));
		return str_replace('1','0',$d->format($fmt));
	}

	try {
		$from_obj = new DateTimeZone($from);
	}
	catch(Exception $e) {
		$from_obj = new DateTimeZone('UTC');
	}

	try {
		$d = new DateTime($s, $from_obj);
	}
	catch(Exception $e) {
		logger('datetime_convert: exception: ' . $e->getMessage());
		$d = new DateTime('now', $from_obj);
	}

	try {
		$to_obj = new DateTimeZone($to);
	}
	catch(Exception $e) {
		$to_obj = new DateTimeZone('UTC');
	}

	$d->setTimeZone($to_obj);
	return($d->format($fmt));
}

// wrapper for date selector, tailored for use in birthday fields

function dob($dob) {
	list($year,$month,$day) = sscanf($dob,'%4d-%2d-%2d');
	$y = datetime_convert('UTC',date_default_timezone_get(),'now','Y');
	$f = get_config('system','birthday_input_format');
	if(! $f)
		$f = 'ymd';
	$o = datesel($f,'',1920,$y,true,$year,$month,$day);
	return $o;
}


function datesel_format($f) {

	$o = '';

	if(strlen($f)) {
		for($x = 0; $x < strlen($f); $x ++) {
			switch($f[$x]) {
				case 'y':
					if(strlen($o))
						$o .= '-';
					$o .= t('year');					
					break;
				case 'm':
					if(strlen($o))
						$o .= '-';
					$o .= t('month');					
					break;
				case 'd':
					if(strlen($o))
						$o .= '-';
					$o .= t('day');
					break;
				default:
					break;
			}
		}
	}
	return $o;
}


// returns a date selector.
// $f           = format string, e.g. 'ymd' or 'mdy'
// $pre         = prefix (if needed) for HTML name and class fields
// $ymin        = first year shown in selector dropdown
// $ymax        = last year shown in selector dropdown
// $allow_blank = allow an empty response on any field
// $y           = already selected year
// $m           = already selected month
// $d           = already selected day


function datesel($f,$pre,$ymin,$ymax,$allow_blank,$y,$m,$d) {

	$o = '';

	if(strlen($f)) {
		for($z = 0; $z < strlen($f); $z ++) {
			if($f[$z] === 'y') {

				$o .= "<select name=\"{$pre}year\" class=\"{$pre}year\" size=\"1\">";
				if($allow_blank) {
					$sel = (($y == '0000') ? " selected=\"selected\" " : "");
					$o .= "<option value=\"0000\" $sel ></option>";
				}

				if($ymax > $ymin) {
					for($x = $ymax; $x >= $ymin; $x --) {
						$sel = (($x == $y) ? " selected=\"selected\" " : "");
						$o .= "<option value=\"$x\" $sel>$x</option>";
					}
				}
				else {
					for($x = $ymax; $x <= $ymin; $x ++) {
						$sel = (($x == $y) ? " selected=\"selected\" " : "");
						$o .= "<option value=\"$x\" $sel>$x</option>";
					}
				}
			}
			elseif($f[$z] == 'm') {
  
				$o .= "</select> <select name=\"{$pre}month\" class=\"{$pre}month\" size=\"1\">";
				for($x = (($allow_blank) ? 0 : 1); $x <= 12; $x ++) {
					$sel = (($x == $m) ? " selected=\"selected\" " : "");
					$y = (($x) ? $x : '');
					$o .= "<option value=\"$x\" $sel>$y</option>";
				}
			}
			elseif($f[$z] == 'd') {

				$o .= "</select> <select name=\"{$pre}day\" class=\"{$pre}day\" size=\"1\">";
				for($x = (($allow_blank) ? 0 : 1); $x <= 31; $x ++) {
					$sel = (($x == $d) ? " selected=\"selected\" " : "");
					$y = (($x) ? $x : '');
					$o .= "<option value=\"$x\" $sel>$y</option>";
				}
			}
		}
	}

	$o .= "</select>";
	return $o;
}


function timesel($pre,$h,$m) {

	$o = '';
	$o .= "<select name=\"{$pre}hour\" class=\"{$pre}hour\" size=\"1\">";
	for($x = 0; $x < 24; $x ++) {
		$sel = (($x == $h) ? " selected=\"selected\" " : "");
		$o .= "<option value=\"$x\" $sel>$x</option>";
	}
	$o .= "</select> : <select name=\"{$pre}minute\" class=\"{$pre}minute\" size=\"1\">";
	for($x = 0; $x < 60; $x ++) {
		$sel = (($x == $m) ? " selected=\"selected\" " : "");
		$o .= "<option value=\"$x\" $sel>$x</option>";
	}

	$o .= "</select>";
	return $o;
}








// implements "3 seconds ago" etc.
// based on $posted_date, (UTC).
// Results relative to current timezone
// Limited to range of timestamps


function relative_date($posted_date,$format = null) {

	$localtime = datetime_convert('UTC',date_default_timezone_get(),$posted_date); 

	$abs = strtotime($localtime);
    
    if (is_null($posted_date) || $posted_date === '0000-00-00 00:00:00' || $abs === False) {
		 return t('never');
	}

	$etime = time() - $abs;
    
	if ($etime < 1) {
		return t('less than a second ago');
	}
    
	$a = array( 12 * 30 * 24 * 60 * 60  =>  array( t('year'),   t('years')),
				30 * 24 * 60 * 60       =>  array( t('month'),  t('months')),
				7  * 24 * 60 * 60       =>  array( t('week'),   t('weeks')),
				24 * 60 * 60            =>  array( t('day'),    t('days')),
				60 * 60                 =>  array( t('hour'),   t('hours')),
				60                      =>  array( t('minute'), t('minutes')),
				1                       =>  array( t('second'), t('seconds'))
	);
    
	foreach ($a as $secs => $str) {
		$d = $etime / $secs;
		if ($d >= 1) {
			$r = round($d);
			// translators - e.g. 22 hours ago, 1 minute ago
			if(! $format)
				$format = t('%1$d %2$s ago');
			return sprintf( $format,$r, (($r == 1) ? $str[0] : $str[1]));
        }
    }
}



// Returns age in years, given a date of birth,
// the timezone of the person whose date of birth is provided,
// and the timezone of the person viewing the result.
// Why? Bear with me. Let's say I live in Mittagong, Australia, and my 
// birthday is on New Year's. You live in San Bruno, California.
// When exactly are you going to see my age increase?
// A: 5:00 AM Dec 31 San Bruno time. That's precisely when I start 
// celebrating and become a year older. If you wish me happy birthday 
// on January 1 (San Bruno time), you'll be a day late. 
   
function age($dob,$owner_tz = '',$viewer_tz = '') {
	if(! intval($dob))
		return 0;
	if(! $owner_tz)
		$owner_tz = date_default_timezone_get();
	if(! $viewer_tz)
		$viewer_tz = date_default_timezone_get();

	$birthdate = datetime_convert('UTC',$owner_tz,$dob . ' 00:00:00+00:00','Y-m-d');
	list($year,$month,$day) = explode("-",$birthdate);
	$year_diff  = datetime_convert('UTC',$viewer_tz,'now','Y') - $year;
	$curr_month = datetime_convert('UTC',$viewer_tz,'now','m');
	$curr_day   = datetime_convert('UTC',$viewer_tz,'now','d');

	if(($curr_month < $month) || (($curr_month == $month) && ($curr_day < $day)))
		$year_diff--;
	return $year_diff;
}



// Get days in month
// get_dim($year, $month);
// returns number of days.
// $month[1] = 'January'; 
//   to match human usage.


function get_dim($y,$m) {

  $dim = array( 0,
    31, 28, 31, 30, 31, 30,
    31, 31, 30, 31, 30, 31);
 
  if($m != 2)
    return $dim[$m];
  if(((($y % 4) == 0) && (($y % 100) != 0)) || (($y % 400) == 0))
    return 29;
  return $dim[2];
}


// Returns the first day in month for a given month, year
// get_first_dim($year,$month)
// returns 0 = Sunday through 6 = Saturday
// Months start at 1.


function get_first_dim($y,$m) {
  $d = sprintf('%04d-%02d-01 00:00', intval($y), intval($m));
  return datetime_convert('UTC','UTC',$d,'w');
}

// output a calendar for the given month, year.
// if $links are provided (array), e.g. $links[12] => 'http://mylink' , 
// date 12 will be linked appropriately. Today's date is also noted by 
// altering td class.
// Months count from 1.


// TODO: provide (prev,next) links, define class variations for different size calendars

function cal($y = 0,$m = 0, $links = false, $class='') {


	// month table - start at 1 to match human usage.

	$mtab = array(' ',
	  'January','February','March',
	  'April','May','June',
	  'July','August','September',
	  'October','November','December'
	); 

	$thisyear = datetime_convert('UTC',date_default_timezone_get(),'now','Y');
	$thismonth = datetime_convert('UTC',date_default_timezone_get(),'now','m');
	if(! $y)
		$y = $thisyear;
	if(! $m)
		$m = intval($thismonth);

  $dn = array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
  $f = get_first_dim($y,$m);
  $l = get_dim($y,$m);
  $d = 1;
  $dow = 0;
  $started = false;

  if(($y == $thisyear) && ($m == $thismonth))
    $tddate = intval(datetime_convert('UTC',date_default_timezone_get(),'now','j'));

	$str_month = day_translate($mtab[$m]);
  $o = '<table class="calendar' . $class . '">';
  $o .= "<caption>$str_month $y</caption><tr>";
  for($a = 0; $a < 7; $a ++)
     $o .= '<th>' . mb_substr(day_translate($dn[$a]),0,3,'UTF-8') . '</th>';
  $o .= '</tr><tr>';

  while($d <= $l) {
    if(($dow == $f) && (! $started))
      $started = true;
    $today = (((isset($tddate)) && ($tddate == $d)) ? "class=\"today\" " : '');
    $o .= "<td $today>";
	$day = str_replace(' ','&nbsp;',sprintf('%2.2d', $d));
    if($started) {
      if(is_array($links) && isset($links[$d]))
        $o .=  "<a href=\"{$links[$d]}\">$day</a>";
      else
        $o .= $day;
      $d ++;
    }
    else
      $o .= '&nbsp;';
    $o .= '</td>';
    $dow ++;
    if(($dow == 7) && ($d <= $l)) {
      $dow = 0;
      $o .= '</tr><tr>';
    }
  }
  if($dow)
    for($a = $dow; $a < 7; $a ++)
       $o .= '<td>&nbsp;</td>';
  $o .= '</tr></table>'."\r\n";  
  
  return $o;
}


/**
 * Return the next birthday, converted from the owner's timezone to UTC. 
 * This makes it globally portable.
 * If the provided birthday lacks a month and or day, return an empty string.
 * A missing year is acceptable.
 */


function z_birthday($dob,$tz,$format="Y-m-d H:i:s") {

	if(! strlen($tz))
		$tz = 'UTC';

	$birthday = '';
	$tmp_dob = substr($dob,5);
	$tmp_d = substr($dob,8);
	if(intval($tmp_dob) && intval($tmp_d)) {
		$y = datetime_convert($tz,$tz,'now','Y');
		$bd = $y . '-' . $tmp_dob . ' 00:00';
		$t_dob = strtotime($bd);
		$now = strtotime(datetime_convert($tz,$tz,'now'));
		if($t_dob < $now)
			$bd = $y + 1 . '-' . $tmp_dob . ' 00:00';
		$birthday = datetime_convert($tz,'UTC',$bd,$format);
	}

	return $birthday;

}

/**
 *
 * Create a birthday event for any connections with a birthday in the next 1-2 weeks.
 * Update the year so that we don't create another event until next year.
 *
 */


function update_birthdays() {

	require_once('include/event.php');

    $r = q("SELECT * FROM abook left join xchan on abook_xchan = xchan_hash 
		WHERE abook_dob > utc_timestamp() + interval 7 day and abook_dob < utc_timestamp() + interval 14 day");
	if($r) {
		foreach($r as $rr) {
			$ev = array();
			$ev['uid'] = $rr['abook_channel'];
			$ev['account'] = $rr['abook_account'];
			$ev['event_xchan'] = $rr['xchan_hash'];
			$ev['start'] = datetime_convert('UTC','UTC', $rr['abook_dob']);
			$ev['finish'] = datetime_convert('UTC','UTC', $rr['abook_dob'] . ' + 1 day ');
			$ev['adjust'] = 1;
            $ev['summary'] = sprintf( t('%1$s\'s birthday'), $rr['xchan_name']);
            $ev['description'] = sprintf( t('Happy Birthday %1$s'), 
				'[zrl=' . $rr['xchan_url'] . ']' . $rr['xchan_name'] . '[/zrl]') ;
			$ev['type'] = 'birthday';
			
			$z = event_store_event($ev);
			if($z) {
				$item_id = event_store_item($ev,$z);
				q("update abook set abook_dob = '%s' where abook_id = %d limit 1",
					dbesc(intval($rr['abook_dob']) + 1 . substr($rr['abook_dob'],4)),
					intval($rr['abook_id'])
				);
			}
		}
	}
}