friendica/include/datetime.php

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<?php
if(! function_exists('timezone_cmp')) {
function timezone_cmp($a, $b) {
if(strstr($a,'/') && strstr($b,'/')) {
if ($a == $b) return 0;
return ($a < $b) ? -1 : 1;
}
if(strstr($a,'/')) return -1;
if(strstr($b,'/')) return 1;
if ($a == $b) return 0;
return ($a < $b) ? -1 : 1;
}}
if(! function_exists('select_timezone')) {
function select_timezone($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];
$o .= "<optgroup label=\"$continent\">";
}
if(count($ex) > 2)
$city = substr($value,strpos($value,'/')+1);
else
$city = $ex[1];
}
else {
$city = $ex[0];
if($continent != 'Miscellaneous') {
$o .= '</optgroup>';
$continent = 'Miscellaneous';
$o .= "<optgroup label=\"$continent\">";
}
}
$city = str_replace('_', ' ', $city);
$selected = (($value == $current) ? " selected=\"selected\" " : "");
$o .= "<option value=\"$value\" $selected >$city</option>";
}
$o .= '</optgroup></select>';
return $o;
}}
if(! function_exists('datetime_convert')) {
function datetime_convert($from = 'UTC', $to = 'UTC', $s = 'now', $fmt = "Y-m-d H:i:s") {
$d = new DateTime($s, new DateTimeZone($from));
$d->setTimeZone(new DateTimeZone($to));
return($d->format($fmt));
}}
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function dob($dob) {
list($year,$month,$day) = sscanf($dob,'%4d-%2d-%2d');
$y = datetime_convert('UTC',date_default_timezone_get(),'now','Y');
$o = datesel('',1920,$y,true,$year,$month,$day);
return $o;
}
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if(! function_exists('datesel')) {
function datesel($pre,$ymin,$ymax,$allow_blank,$y,$m,$d) {
$o = '';
$o .= "<select name=\"{$pre}year\" class=\"{$pre}year\" size=\"1\">";
if($allow_blank) {
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$sel = (($y == '0000') ? " selected=\"selected\" " : "");
$o .= "<option value=\"0000\" $sel ></option>";
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}
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for($x = $ymax; $x >= $ymin; $x --) {
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$sel = (($x == $y) ? " selected=\"selected\" " : "");
$o .= "<option value=\"$x\" $sel>$x</option>";
}
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$o .= "</select> <select name=\"{$pre}month\" class=\"{$pre}month\" size=\"1\">";
for($x = 0; $x <= 12; $x ++) {
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$sel = (($x == $m) ? " selected=\"selected\" " : "");
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$y = (($x) ? $x : '');
$o .= "<option value=\"$x\" $sel>$y</option>";
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}
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$o .= "</select> <select name=\"{$pre}day\" class=\"{$pre}day\" size=\"1\">";
for($x = 0; $x <= 31; $x ++) {
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$sel = (($x == $d) ? " selected=\"selected\" " : "");
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$y = (($x) ? $x : '');
$o .= "<option value=\"$x\" $sel>$y</option>";
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}
$o .= "</select>";
return $o;
}}
// TODO rewrite this buggy sucker
function relative_date($posted_date) {
$localtime = datetime_convert('UTC',date_default_timezone_get(),$posted_date);
$in_seconds = strtotime($localtime);
$diff = time() - $in_seconds;
$months = floor($diff/2592000);
$diff -= $months*2419200;
$weeks = floor($diff/604800);
$diff -= $weeks*604800;
$days = floor($diff/86400);
$diff -= $days*86400;
$hours = floor($diff/3600);
$diff -= $hours*3600;
$minutes = floor($diff/60);
$diff -= $minutes*60;
$seconds = $diff;
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if($months > 2)
return(datetime_convert('UTC',date_default_timezone_get(),$posted_date,'\o\n Y-m-d \a\t H:i:s'));
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if ($months>0) {
// over a month old,
return 'over a month ago';
} else {
if ($weeks>0) {
// weeks and days
$relative_date .= ($relative_date?', ':'').$weeks.' week'.($weeks!=1 ?'s':'');
} elseif ($days>0) {
// days and hours
$relative_date .= ($relative_date?', ':'').$days.' day'.($days!=1?'s':'');
} elseif ($hours>0) {
// hours and minutes
$relative_date .= ($relative_date?', ':'').$hours.' hour'.($hours!=1?'s':'');
} elseif ($minutes>0) {
// minutes only
$relative_date .= ($relative_date?', ':'').$minutes.' minute'.($minutes!=1?'s':'');
} else {
// seconds only
$relative_date .= ($relative_date?', ':'').$seconds.' second'.($seconds!=1?'s':'');
}
}
// show relative date and add proper verbiage
return $relative_date.' ago';
}
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function age($dob,$owner_tz = '',$viewer_tz = '') {
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if(! intval($dob))
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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;
}