3 // two-level sort for timezones.
5 if(! function_exists('timezone_cmp')) {
6 function timezone_cmp($a, $b) {
7 if(strstr($a,'/') && strstr($b,'/')) {
8 if ( t($a) == t($b)) return 0;
9 return ( t($a) < t($b)) ? -1 : 1;
11 if(strstr($a,'/')) return -1;
12 if(strstr($b,'/')) return 1;
13 if ( t($a) == t($b)) return 0;
14 return ( t($a) < t($b)) ? -1 : 1;
17 // emit a timezone selector grouped (primarily) by continent
19 if(! function_exists('select_timezone')) {
20 function select_timezone($current = 'America/Los_Angeles') {
22 $timezone_identifiers = DateTimeZone::listIdentifiers();
24 $o ='<select id="timezone_select" name="timezone">';
26 usort($timezone_identifiers, 'timezone_cmp');
28 foreach($timezone_identifiers as $value) {
29 $ex = explode("/", $value);
31 if($ex[0] != $continent) {
35 $o .= '<optgroup label="' . t($continent) . '">';
38 $city = substr($value,strpos($value,'/')+1);
44 if($continent != t('Miscellaneous')) {
46 $continent = t('Miscellaneous');
47 $o .= '<optgroup label="' . t($continent) . '">';
50 $city = str_replace('_', ' ', t($city));
51 $selected = (($value == $current) ? " selected=\"selected\" " : "");
52 $o .= "<option value=\"$value\" $selected >$city</option>";
54 $o .= '</optgroup></select>';
58 // General purpose date parse/convert function.
59 // $from = source timezone
60 // $to = dest timezone
61 // $s = some parseable date/time string
62 // $fmt = output format
64 if(! function_exists('datetime_convert')) {
65 function datetime_convert($from = 'UTC', $to = 'UTC', $s = 'now', $fmt = "Y-m-d H:i:s") {
67 // Slight hackish adjustment so that 'zero' datetime actually returns what is intended
68 // otherwise we end up with -0001-11-30 ...
69 // add 32 days so that we at least get year 00, and then hack around the fact that
70 // months and days always start with 1.
72 if(substr($s,0,10) == '0000-00-00') {
73 $d = new DateTime($s . ' + 32 days', new DateTimeZone('UTC'));
74 return str_replace('1','0',$d->format($fmt));
77 $d = new DateTime($s, new DateTimeZone($from));
78 $d->setTimeZone(new DateTimeZone($to));
79 return($d->format($fmt));
82 // wrapper for date selector, tailored for use in birthday fields
85 list($year,$month,$day) = sscanf($dob,'%4d-%2d-%2d');
86 $y = datetime_convert('UTC',date_default_timezone_get(),'now','Y');
87 $f = get_config('system','birthday_input_format');
90 $o = datesel($f,'',1920,$y,true,$year,$month,$day);
95 function datesel_format($f) {
100 for($x = 0; $x < strlen($f); $x ++) {
126 // returns a date selector.
127 // $f = format string, e.g. 'ymd' or 'mdy'
128 // $pre = prefix (if needed) for HTML name and class fields
129 // $ymin = first year shown in selector dropdown
130 // $ymax = last year shown in selector dropdown
131 // $allow_blank = allow an empty response on any field
132 // $y = already selected year
133 // $m = already selected month
134 // $d = already selected day
136 if(! function_exists('datesel')) {
137 function datesel($f,$pre,$ymin,$ymax,$allow_blank,$y,$m,$d) {
142 for($z = 0; $z < strlen($f); $z ++) {
145 $o .= "<select name=\"{$pre}year\" class=\"{$pre}year\" size=\"1\">";
147 $sel = (($y == '0000') ? " selected=\"selected\" " : "");
148 $o .= "<option value=\"0000\" $sel ></option>";
152 for($x = $ymax; $x >= $ymin; $x --) {
153 $sel = (($x == $y) ? " selected=\"selected\" " : "");
154 $o .= "<option value=\"$x\" $sel>$x</option>";
158 for($x = $ymax; $x <= $ymin; $x ++) {
159 $sel = (($x == $y) ? " selected=\"selected\" " : "");
160 $o .= "<option value=\"$x\" $sel>$x</option>";
164 elseif($f[$z] == 'm') {
166 $o .= "</select> <select name=\"{$pre}month\" class=\"{$pre}month\" size=\"1\">";
167 for($x = (($allow_blank) ? 0 : 1); $x <= 12; $x ++) {
168 $sel = (($x == $m) ? " selected=\"selected\" " : "");
169 $y = (($x) ? $x : '');
170 $o .= "<option value=\"$x\" $sel>$y</option>";
173 elseif($f[$z] == 'd') {
175 $o .= "</select> <select name=\"{$pre}day\" class=\"{$pre}day\" size=\"1\">";
176 for($x = (($allow_blank) ? 0 : 1); $x <= 31; $x ++) {
177 $sel = (($x == $d) ? " selected=\"selected\" " : "");
178 $y = (($x) ? $x : '');
179 $o .= "<option value=\"$x\" $sel>$y</option>";
189 if(! function_exists('timesel')) {
190 function timesel($pre,$h,$m) {
193 $o .= "<select name=\"{$pre}hour\" class=\"{$pre}hour\" size=\"1\">";
194 for($x = 0; $x < 24; $x ++) {
195 $sel = (($x == $h) ? " selected=\"selected\" " : "");
196 $o .= "<option value=\"$x\" $sel>$x</option>";
198 $o .= "</select> : <select name=\"{$pre}minute\" class=\"{$pre}minute\" size=\"1\">";
199 for($x = 0; $x < 60; $x ++) {
200 $sel = (($x == $m) ? " selected=\"selected\" " : "");
201 $o .= "<option value=\"$x\" $sel>$x</option>";
215 // implements "3 seconds ago" etc.
216 // based on $posted_date, (UTC).
217 // Results relative to current timezone
218 // Limited to range of timestamps
220 if(! function_exists('relative_date')) {
221 function relative_date($posted_date) {
223 $localtime = datetime_convert('UTC',date_default_timezone_get(),$posted_date);
225 $abs = strtotime($localtime);
227 if (is_null($posted_date) || $posted_date === '0000-00-00 00:00:00' || $abs === False) {
231 $etime = time() - $abs;
234 return t('less than a second ago');
237 $a = array( 12 * 30 * 24 * 60 * 60 => array( t('year'), t('years')),
238 30 * 24 * 60 * 60 => array( t('month'), t('months')),
239 7 * 24 * 60 * 60 => array( t('week'), t('weeks')),
240 24 * 60 * 60 => array( t('day'), t('days')),
241 60 * 60 => array( t('hour'), t('hours')),
242 60 => array( t('minute'), t('minutes')),
243 1 => array( t('second'), t('seconds'))
246 foreach ($a as $secs => $str) {
250 return $r . ' ' . (($r == 1) ? $str[0] : $str[1]) . t(' ago');
257 // Returns age in years, given a date of birth,
258 // the timezone of the person whose date of birth is provided,
259 // and the timezone of the person viewing the result.
260 // Why? Bear with me. Let's say I live in Mittagong, Australia, and my
261 // birthday is on New Year's. You live in San Bruno, California.
262 // When exactly are you going to see my age increase?
263 // A: 5:00 AM Dec 31 San Bruno time. That's precisely when I start
264 // celebrating and become a year older. If you wish me happy birthday
265 // on January 1 (San Bruno time), you'll be a day late.
267 function age($dob,$owner_tz = '',$viewer_tz = '') {
271 $owner_tz = date_default_timezone_get();
273 $viewer_tz = date_default_timezone_get();
275 $birthdate = datetime_convert('UTC',$owner_tz,$dob . ' 00:00:00+00:00','Y-m-d');
276 list($year,$month,$day) = explode("-",$birthdate);
277 $year_diff = datetime_convert('UTC',$viewer_tz,'now','Y') - $year;
278 $curr_month = datetime_convert('UTC',$viewer_tz,'now','m');
279 $curr_day = datetime_convert('UTC',$viewer_tz,'now','d');
281 if(($curr_month < $month) || (($curr_month == $month) && ($curr_day < $day)))
289 // get_dim($year, $month);
290 // returns number of days.
291 // $month[1] = 'January';
292 // to match human usage.
294 if(! function_exists('get_dim')) {
295 function get_dim($y,$m) {
298 31, 28, 31, 30, 31, 30,
299 31, 31, 30, 31, 30, 31);
303 if(((($y % 4) == 0) && (($y % 100) != 0)) || (($y % 400) == 0))
309 // Returns the first day in month for a given month, year
310 // get_first_dim($year,$month)
311 // returns 0 = Sunday through 6 = Saturday
312 // Months start at 1.
314 if(! function_exists('get_first_dim')) {
315 function get_first_dim($y,$m) {
316 $d = sprintf('%04d-%02d-01 00:00', intval($y), intval($m));
317 return datetime_convert('UTC','UTC',$d,'w');
320 // output a calendar for the given month, year.
321 // if $links are provided (array), e.g. $links[12] => 'http://mylink' ,
322 // date 12 will be linked appropriately. Today's date is also noted by
323 // altering td class.
324 // Months count from 1.
327 // TODO: provide (prev,next) links, define class variations for different size calendars
330 if(! function_exists('cal')) {
331 function cal($y = 0,$m = 0, $links = false, $class='') {
334 // month table - start at 1 to match human usage.
337 'January','February','March',
338 'April','May','June',
339 'July','August','September',
340 'October','November','December'
343 $thisyear = datetime_convert('UTC',date_default_timezone_get(),'now','Y');
344 $thismonth = datetime_convert('UTC',date_default_timezone_get(),'now','m');
348 $m = intval($thismonth);
350 $dn = array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
351 $f = get_first_dim($y,$m);
357 if(($y == $thisyear) && ($m == $thismonth))
358 $tddate = intval(datetime_convert('UTC',date_default_timezone_get(),'now','j'));
360 $str_month = day_translate($mtab[$m]);
361 $o = '<table class="calendar' . $class . '">';
362 $o .= "<caption>$str_month $y</caption><tr>";
363 for($a = 0; $a < 7; $a ++)
364 $o .= '<th>' . mb_substr(day_translate($dn[$a]),0,3,'UTF-8') . '</th>';
368 if(($dow == $f) && (! $started))
370 $today = (((isset($tddate)) && ($tddate == $d)) ? "class=\"today\" " : '');
372 $day = str_replace(' ',' ',sprintf('%2.2d', $d));
374 if(is_array($links) && isset($links[$d]))
375 $o .= "<a href=\"{$links[$d]}\">$day</a>";
384 if(($dow == 7) && ($d <= $l)) {
390 for($a = $dow; $a < 7; $a ++)
391 $o .= '<td> </td>';
392 $o .= '</tr></table>'."\r\n";