X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=include%2Fdatetime.php;h=a8320d33216a448fd70647f3eda112384052dcc6;hb=bae725c2797fcae0d61c13822d27e4277ec0cc0e;hp=79964ef404525e5074d226f836040aa1894a5298;hpb=59559e74520ad3b2a3f121b469debdc4fbde1bef;p=friendica.git

diff --git a/include/datetime.php b/include/datetime.php
index 79964ef404..a8320d3321 100644
--- a/include/datetime.php
+++ b/include/datetime.php
@@ -1,21 +1,46 @@
 <?php
+/**
+ * @file include/datetime.php
+ * @brief Some functions for date and time related tasks.
+ */
 
-// two-level sort for timezones.
+use Friendica\Core\Config;
+use Friendica\Core\L10n;
+use Friendica\Core\PConfig;
+use Friendica\Database\DBM;
 
-if(! function_exists('timezone_cmp')) {
+/**
+ * @brief Two-level sort for timezones.
+ *
+ * @param string $a
+ * @param string $b
+ * @return int
+ */
 function timezone_cmp($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($b)) ? -1 : 1;
-}}
-
-// emit a timezone selector grouped (primarily) by continent
-if(! function_exists('select_timezone')) {
+	if (strstr($a, '/') && strstr($b, '/')) {
+		if (L10n::t($a) == L10n::t($b)) {
+			return 0;
+		}
+		return (L10n::t($a) < L10n::t($b)) ? -1 : 1;
+	}
+
+	if (strstr($a, '/')) {
+		return -1;
+	} elseif (strstr($b, '/')) {
+		return  1;
+	} elseif (L10n::t($a) == L10n::t($b)) {
+		return 0;
+	}
+
+	return (L10n::t($a) < L10n::t($b)) ? -1 : 1;
+}
+
+/**
+ * @brief Emit a timezone selector grouped (primarily) by continent
+ *
+ * @param string $current Timezone
+ * @return string Parsed HTML output
+ */
 function select_timezone($current = 'America/Los_Angeles') {
 
 	$timezone_identifiers = DateTimeZone::listIdentifiers();
@@ -24,176 +49,215 @@ function select_timezone($current = 'America/Los_Angeles') {
 
 	usort($timezone_identifiers, 'timezone_cmp');
 	$continent = '';
-	foreach($timezone_identifiers as $value) {
+	foreach ($timezone_identifiers as $value) {
 		$ex = explode("/", $value);
-		if(count($ex) > 1) {
-			if($ex[0] != $continent) {
-				if($continent != '')
+		if (count($ex) > 1) {
+			if ($ex[0] != $continent) {
+				if ($continent != '') {
 					$o .= '</optgroup>';
+				}
 				$continent = $ex[0];
-				$o .= '<optgroup label="' . t($continent) . '">';
+				$o .= '<optgroup label="' . L10n::t($continent) . '">';
 			}
-			if(count($ex) > 2)
+			if (count($ex) > 2) {
 				$city = substr($value,strpos($value,'/')+1);
-			else
+			} else {
 				$city = $ex[1];
-		}
-		else {
+			}
+		} else {
 			$city = $ex[0];
-			if($continent != t('Miscellaneous')) {
+			if ($continent != L10n::t('Miscellaneous')) {
 				$o .= '</optgroup>';
-				$continent = t('Miscellaneous');
-				$o .= '<optgroup label="' . t($continent) . '">';
+				$continent = L10n::t('Miscellaneous');
+				$o .= '<optgroup label="' . L10n::t($continent) . '">';
 			}
 		}
-		$city = str_replace('_', ' ',  t($city));
+		$city = str_replace('_', ' ', L10n::t($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'
-if (!function_exists('field_timezone')){
+
+/**
+ * @brief Generating a Timezone selector
+ *
+ * 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'
+ *
+ * @param string $name Name of the selector
+ * @param string $label Label for the selector
+ * @param string $current Timezone
+ * @param string $help Help text
+ *
+ * @return string Parsed HTML
+ */
 function field_timezone($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, $options),
-	));
-
-}}
+	return replace_macros($tpl, [
+		'$field' => [$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
+}
 
-if(! function_exists('datetime_convert')) {
+/**
+ * @brief General purpose date parse/convert function.
+ *
+ * @param string $from Source timezone
+ * @param string $to Dest timezone
+ * @param string $s Some parseable date/time string
+ * @param string $fmt Output format recognised from php's DateTime class
+ *   http://www.php.net/manual/en/datetime.format.php
+ *
+ * @return string Formatted date according to given format
+ */
 function datetime_convert($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($from === '')
+	if ($from === '') {
 		$from = 'UTC';
-	if($to === '')
+	}
+	if ($to === '') {
 		$to = 'UTC';
-	if( ($s === '') || (! is_string($s)) )
+	}
+	if ( ($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.
+	/*
+	 * 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($s,0,10) == '0000-00-00') {
+	if (substr($s,0,10) <= '0001-01-01') {
 		$d = new DateTime($s . ' + 32 days', new DateTimeZone('UTC'));
 		return str_replace('1','0',$d->format($fmt));
 	}
 
 	try {
 		$from_obj = new DateTimeZone($from);
-	}
-	catch(Exception $e) {
+	} catch (Exception $e) {
 		$from_obj = new DateTimeZone('UTC');
 	}
 
 	try {
 		$d = new DateTime($s, $from_obj);
-	}
-	catch(Exception $e) {
+	} catch (Exception $e) {
 		logger('datetime_convert: exception: ' . $e->getMessage());
 		$d = new DateTime('now', $from_obj);
 	}
 
 	try {
 		$to_obj = new DateTimeZone($to);
-	}
-	catch(Exception $e) {
+	} catch (Exception $e) {
 		$to_obj = new DateTimeZone('UTC');
 	}
 
 	$d->setTimeZone($to_obj);
-	return($d->format($fmt));
-}}
+
+	return $d->format($fmt);
+}
 
 
-// wrapper for date selector, tailored for use in birthday fields
+/**
+ * @brief Wrapper for date selector, tailored for use in birthday fields.
+ *
+ * @param string $dob Date of Birth
+ * @return string Formatted html
+ */
+function dob($dob)
+{
+	list($year, $month, $day) = sscanf($dob, '%4d-%2d-%2d');
 
-function dob($dob) {
-	list($year,$month,$day) = sscanf($dob,'%4d-%2d-%2d');
-	$f = get_config('system','birthday_input_format');
-	if(! $f)
-		$f = 'ymd';
-	if($dob === '0000-00-00')
+	if ($dob <= '0001-01-01') {
 		$value = '';
-	else
+	} else {
 		$value = (($year) ? datetime_convert('UTC','UTC',$dob,'Y-m-d') : datetime_convert('UTC','UTC',$dob,'m-d'));
-	$o = '<input type="text" name="dob" value="' . $value . '" placeholder="' . t('YYYY-MM-DD or MM-DD') . '" />';
-//	if ($dob && $dob != '0000-00-00')
-//		$o = datesel($f,mktime(0,0,0,0,0,1900),mktime(),mktime(0,0,0,$month,$day,$year),'dob');
-//	else
-//		$o = datesel($f,mktime(0,0,0,0,0,1900),mktime(),false,'dob');
+	}
+
+	$age = ((intval($value)) ? age($value, $a->user["timezone"], $a->user["timezone"]) : "");
+
+	$o = replace_macros(get_markup_template("field_input.tpl"), [
+		'$field' => [
+			'dob',
+			t('Birthday:'),
+			$value,
+			(((intval($age)) > 0 ) ? L10n::t('Age: ') . $age : ""),
+			'',
+			'placeholder="' . L10n::t('YYYY-MM-DD or MM-DD') . '"'
+		]
+	]);
+
+	/// @TODO Old-lost code?
+	//	if ($dob && $dob > '0001-01-01')
+	//		$o = datesel($f,mktime(0,0,0,0,0,1900),mktime(),mktime(0,0,0,$month,$day,$year), 'dob');
+	//	else
+	//		$o = datesel($f,mktime(0,0,0,0,0,1900),mktime(),false,'dob');
+
 	return $o;
 }
 
 /**
- * returns a date selector
- * @param $format
- *  format string, e.g. 'ymd' or 'mdy'. Not currently supported
- * @param $min
- *  unix timestamp of minimum date
- * @param $max
- *  unix timestap of maximum date
- * @param $default
- *  unix timestamp of default date
- * @param $id
- *  id and name of datetimepicker (defaults to "datetimepicker")
+ * @brief Returns a date selector
+ *
+ * @param string $min
+ *  Unix timestamp of minimum date
+ * @param string $max
+ *  Unix timestap of maximum date
+ * @param string $default
+ *  Unix timestamp of default date
+ * @param string $id
+ *  ID and name of datetimepicker (defaults to "datetimepicker")
+ *
+ * @return string Parsed HTML output.
  */
-if(! function_exists('datesel')) {
-function datesel($format, $min, $max, $default, $id = 'datepicker') {
-	return datetimesel($format,$min,$max,$default,$id,true,false, '','');
-}}
+function datesel($min, $max, $default, $id = 'datepicker')
+{
+	return datetimesel($min, $max, $default, '', $id, true, false, '', '');
+}
 
 /**
- * returns a time selector
- * @param $format
- *  format string, e.g. 'ymd' or 'mdy'. Not currently supported
+ * @brief Returns a time selector
+ *
  * @param $h
- *  already selected hour
+ *  Already selected hour
  * @param $m
- *  already selected minute
- * @param $id
- *  id and name of datetimepicker (defaults to "timepicker")
+ *  Already selected minute
+ * @param string $id
+ *  ID and name of datetimepicker (defaults to "timepicker")
+ *
+ * @return string Parsed HTML output.
  */
-if(! function_exists('timesel')) {
-function timesel($format, $h, $m, $id='timepicker') {
-	return datetimesel($format,new DateTime(),new DateTime(),new DateTime("$h:$m"),$id,false,true);
-}}
+function timesel($h, $m, $id = 'timepicker')
+{
+	return datetimesel(new DateTime(), new DateTime(), new DateTime("$h:$m"), '', $id, false, true);
+}
 
 /**
  * @brief Returns a datetime selector.
  *
- * @param $format
- *  format string, e.g. 'ymd' or 'mdy'. Not currently supported
- * @param $min
+ * @param string $min
  *  unix timestamp of minimum date
- * @param $max
+ * @param string $max
  *  unix timestap of maximum date
- * @param $default
+ * @param string $default
  *  unix timestamp of default date
  * @param string $id
  *  id and name of datetimepicker (defaults to "datetimepicker")
- * @param boolean $pickdate
+ * @param bool $pickdate
  *  true to show date picker (default)
  * @param boolean $picktime
  *  true to show time picker (default)
@@ -201,282 +265,356 @@ function timesel($format, $h, $m, $id='timepicker') {
  *  set minimum date from picker with id $minfrom (none by default)
  * @param $maxfrom
  *  set maximum date from picker with id $maxfrom (none by default)
- * @param boolean $required default false
+ * @param bool $required default false
+ *
  * @return string Parsed HTML output.
  *
  * @todo Once browser support is better this could probably be replaced with
  * native HTML5 date picker.
  */
-if(! function_exists('datetimesel')) {
-function datetimesel($format, $min, $max, $default, $id = 'datetimepicker', $pickdate = true, $picktime = true, $minfrom = '', $maxfrom = '', $required = false) {
-
-	$a = get_app();
-
+function datetimesel($min, $max, $default, $label, $id = 'datetimepicker', $pickdate = true, $picktime = true, $minfrom = '', $maxfrom = '', $required = false)
+{
 	// First day of the week (0 = Sunday)
-	$firstDay = get_pconfig(local_user(),'system','first_day_of_week');
-	if ($firstDay === false) $firstDay=0;
+	$firstDay = PConfig::get(local_user(), 'system', 'first_day_of_week', 0);
 
-	$lang = substr(get_browser_language(), 0, 2);
+	$lang = substr(L10n::getBrowserLanguage(), 0, 2);
 
 	// Check if the detected language is supported by the picker
-	if (!in_array($lang, array("ar", "ro", "id", "bg", "fa", "ru", "uk", "en", "el", "de", "nl", "tr", "fr", "es", "th", "pl", "pt", "ch", "se", "kr", "it", "da", "no", "ja", "vi", "sl", "cs", "hu")))
-		$lang = ((isset($a->config['system']['language'])) ? $a->config['system']['language'] : 'en');
+	if (!in_array($lang, ["ar", "ro", "id", "bg", "fa", "ru", "uk", "en", "el", "de", "nl", "tr", "fr", "es", "th", "pl", "pt", "ch", "se", "kr", "it", "da", "no", "ja", "vi", "sl", "cs", "hu"])) {
+		$lang = Config::get('system', 'language', 'en');
+	}
 
 	$o = '';
 	$dateformat = '';
-	if($pickdate) $dateformat .= 'Y-m-d';
-	if($pickdate && $picktime) $dateformat .= ' ';
-	if($picktime) $dateformat .= 'H:i';
+
+	if ($pickdate) {
+		$dateformat .= 'Y-m-d';
+	}
+	if ($pickdate && $picktime) {
+		$dateformat .= ' ';
+	}
+	if ($picktime) {
+		$dateformat .= 'H:i';
+	}
+
 	$minjs = $min ? ",minDate: new Date({$min->getTimestamp()}*1000), yearStart: " . $min->format('Y') : '';
 	$maxjs = $max ? ",maxDate: new Date({$max->getTimestamp()}*1000), yearEnd: " . $max->format('Y') : '';
 
-	$input_text = $default ? 'value="' . date($dateformat, $default->getTimestamp()) . '"' : '';
+	$input_text = $default ? date($dateformat, $default->getTimestamp()) : '';
 	$defaultdatejs = $default ? ",defaultDate: new Date({$default->getTimestamp()}*1000)" : '';
+
 	$pickers = '';
-	if(!$pickdate) $pickers .= ',datepicker: false';
-	if(!$picktime) $pickers .= ',timepicker: false';
+	if (!$pickdate) {
+		$pickers .= ', datepicker: false';
+	}
+	if (!$picktime) {
+		$pickers .= ',timepicker: false';
+	}
+
 	$extra_js = '';
-	$pickers .= ",dayOfWeekStart: ".$firstDay.",lang:'".$lang."'";
-	if($minfrom != '')
-		$extra_js .= "\$('#$minfrom').data('xdsoft_datetimepicker').setOptions({onChangeDateTime: function (currentDateTime) { \$('#$id').data('xdsoft_datetimepicker').setOptions({minDate: currentDateTime})}})";
-	if($maxfrom != '')
-		$extra_js .= "\$('#$maxfrom').data('xdsoft_datetimepicker').setOptions({onChangeDateTime: function (currentDateTime) { \$('#$id').data('xdsoft_datetimepicker').setOptions({maxDate: currentDateTime})}})";
+	$pickers .= ",dayOfWeekStart: " . $firstDay . ",lang:'" . $lang . "'";
+	if ($minfrom != '') {
+		$extra_js .= "\$('#id_$minfrom').data('xdsoft_datetimepicker').setOptions({onChangeDateTime: function (currentDateTime) { \$('#id_$id').data('xdsoft_datetimepicker').setOptions({minDate: currentDateTime})}})";
+	}
+	if ($maxfrom != '') {
+		$extra_js .= "\$('#id_$maxfrom').data('xdsoft_datetimepicker').setOptions({onChangeDateTime: function (currentDateTime) { \$('#id_$id').data('xdsoft_datetimepicker').setOptions({maxDate: currentDateTime})}})";
+	}
+
 	$readable_format = $dateformat;
 	$readable_format = str_replace('Y','yyyy',$readable_format);
 	$readable_format = str_replace('m','mm',$readable_format);
 	$readable_format = str_replace('d','dd',$readable_format);
 	$readable_format = str_replace('H','HH',$readable_format);
 	$readable_format = str_replace('i','MM',$readable_format);
-	$o .= "<div class='date'><input type='text' placeholder='$readable_format' name='$id' id='$id' $input_text />";
-	$o .= '</div>';
+
+	$tpl = get_markup_template('field_input.tpl');
+	$o .= replace_macros($tpl, [
+			'$field' => [$id, $label, $input_text, '', (($required) ? '*' : ''), 'placeholder="' . $readable_format . '"'],
+		]);
+
 	$o .= "<script type='text/javascript'>";
-	$o .= "\$(function () {var picker = \$('#$id').datetimepicker({step:5,format:'$dateformat' $minjs $maxjs $pickers $defaultdatejs}); $extra_js})";
+	$o .= "\$(function () {var picker = \$('#id_$id').datetimepicker({step:5,format:'$dateformat' $minjs $maxjs $pickers $defaultdatejs}); $extra_js})";
 	$o .= "</script>";
-	return $o;
-}}
 
-// implements "3 seconds ago" etc.
-// based on $posted_date, (UTC).
-// Results relative to current timezone
-// Limited to range of timestamps
+	return $o;
+}
 
-if(! function_exists('relative_date')) {
-function relative_date($posted_date,$format = null) {
+/**
+ * @brief Returns a relative date string.
+ *
+ * Implements "3 seconds ago" etc.
+ * Based on $posted_date, (UTC).
+ * Results relative to current timezone.
+ * Limited to range of timestamps.
+ *
+ * @param string $posted_date MySQL-formatted date string (YYYY-MM-DD HH:MM:SS)
+ * @param string $format (optional) Parsed with sprintf()
+ *    <tt>%1$d %2$s ago</tt>, e.g. 22 hours ago, 1 minute ago
+ *
+ * @return string with relative date
+ */
+function relative_date($posted_date, $format = null) {
 
-	$localtime = datetime_convert('UTC',date_default_timezone_get(),$posted_date);
+	$localtime = $posted_date . ' UTC';
 
 	$abs = strtotime($localtime);
 
-	if (is_null($posted_date) || $posted_date === '0000-00-00 00:00:00' || $abs === False) {
-		 return t('never');
+	if (is_null($posted_date) || $posted_date <= NULL_DATE || $abs === false) {
+		 return L10n::t('never');
 	}
 
 	$etime = time() - $abs;
 
 	if ($etime < 1) {
-		return t('less than a second ago');
-	}
-
-	/*
-	$time_append = '';
-	if ($etime >= 86400) {
-		$time_append = ' ('.$localtime.')';
+		return L10n::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'))
-	);
+	$a = [ 12 * 30 * 24 * 60 * 60  =>  [L10n::t('year'),   L10n::t('years')],
+				30 * 24 * 60 * 60       =>  [L10n::t('month'),  L10n::t('months')],
+				7  * 24 * 60 * 60       =>  [L10n::t('week'),   L10n::t('weeks')],
+				24 * 60 * 60            =>  [L10n::t('day'),    L10n::t('days')],
+				60 * 60                 =>  [L10n::t('hour'),   L10n::t('hours')],
+				60                      =>  [L10n::t('minute'), L10n::t('minutes')],
+				1                       =>  [L10n::t('second'), L10n::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($dob))
+			if (!$format) {
+				$format = L10n::t('%1$d %2$s ago');
+			}
+
+			return sprintf($format, $r, (($r == 1) ? $str[0] : $str[1]));
+		}
+	}
+}
+
+/**
+ * @brief Returns timezone correct age in years.
+ *
+ * Returns the 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.
+ *
+ * @param string $dob Date of Birth
+ * @param string $owner_tz (optional) Timezone of the person of interest
+ * @param string $viewer_tz (optional) Timezone of the person viewing
+ *
+ * @return int Age in years
+ */
+function age($dob, $owner_tz = '', $viewer_tz = '') {
+	if (! intval($dob)) {
 		return 0;
-	if(! $owner_tz)
+	}
+	if (! $owner_tz) {
 		$owner_tz = date_default_timezone_get();
-	if(! $viewer_tz)
+	}
+	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');
+	$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 < $day)))
+	if (($curr_month < $month) || (($curr_month == $month) && ($curr_day < $day))) {
 		$year_diff--;
+	}
+
 	return $year_diff;
 }
 
+/**
+ * @brief Get days of a month in a given year.
+ *
+ * Returns number of days in the month of the given year.
+ * $m = 1 is 'January' to match human usage.
+ *
+ * @param int $y Year
+ * @param int $m Month (1=January, 12=December)
+ *
+ * @return int Number of days in the given month
+ */
+function get_dim($y, $m) {
 
+	$dim = [ 0,
+		31, 28, 31, 30, 31, 30,
+		31, 31, 30, 31, 30, 31];
 
-// Get days in month
-// get_dim($year, $month);
-// returns number of days.
-// $month[1] = 'January'; 
-//   to match human usage.
-
-if(! function_exists('get_dim')) {
-function get_dim($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 $dim[2];
-}}
-
+	if ($m != 2) {
+		return $dim[$m];
+	} elseif (((($y % 4) == 0) && (($y % 100) != 0)) || (($y % 400) == 0)) {
+		return 29;
+	}
 
-// 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.
+	return $dim[2];
+}
 
-if(! function_exists('get_first_dim')) {
+/**
+ * @brief Returns the first day in month for a given month, year.
+ *
+ * Months start at 1.
+ *
+ * @param int $y Year
+ * @param int $m Month (1=January, 12=December)
+ *
+ * @return string day 0 = Sunday through 6 = Saturday
+ */
 function get_first_dim($y,$m) {
-  $d = sprintf('%04d-%02d-01 00:00', intval($y), intval($m));
-  return datetime_convert('UTC','UTC',$d,'w');
-}}
+	$d = sprintf('%04d-%02d-01 00:00', intval($y), intval($m));
 
-// output a calendar for the given month, year.
-// if $links are provided (array), e.g. $links[12] => 'http://mylink' , 
-// date 12 will be linked appropriately. Today's date is also noted by
-// altering td class.
-// Months count from 1.
+	return datetime_convert('UTC','UTC',$d,'w');
+}
 
+/**
+ * @brief 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.
+ *
+ * @param int    $y Year
+ * @param int    $m Month
+ * @param array  $links (default null)
+ * @param string $class
+ *
+ * @return string
+ *
+ * @todo Provide (prev,next) links, define class variations for different size calendars
+ */
+function cal($y = 0, $m = 0, $links = null, $class = '')
+{
+	// month table - start at 1 to match human usage.
+	$mtab = [' ',
+		'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;
+	}
 
-// TODO: provide (prev,next) links, define class variations for different size calendars
+	if (!$m) {
+		$m = intval($thismonth);
+	}
 
+	$dn = ['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(! function_exists('cal')) {
-function cal($y = 0,$m = 0, $links = false, $class='') {
+	if (($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>';
+	}
 
-	// month table - start at 1 to match human usage.
+	$o .= '</tr><tr>';
 
-	$mtab = array(' ',
-	  'January','February','March',
-	  'April','May','June',
-	  'July','August','September',
-	  'October','November','December'
-	);
+	while ($d <= $l) {
+		if (($dow == $f) && (! $started)) {
+			$started = true;
+		}
 
-	$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);
+		$today = (((isset($tddate)) && ($tddate == $d)) ? "class=\"today\" " : '');
+		$o .= "<td $today>";
+		$day = str_replace(' ', '&nbsp;', sprintf('%2.2d', $d));
+		if ($started) {
+			if (x($links, $d) !== false) {
+				$o .= "<a href=\"{$links[$d]}\">$day</a>";
+			} else {
+				$o .= $day;
+			}
 
-  $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;
+			$d ++;
+		} else {
+			$o .= '&nbsp;';
+		}
 
-  if(($y == $thisyear) && ($m == $thismonth))
-    $tddate = intval(datetime_convert('UTC',date_default_timezone_get(),'now','j'));
+		$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>';
+		}
+	}
 
-	$str_month = day_translate($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;
-}}
+	$o .= '</tr></table>' . "\r\n";
 
+	return $o;
+}
 
+/**
+ * @brief Create a birthday event.
+ *
+ * Update the year and the birthday.
+ */
 function update_contact_birthdays() {
 
 	// This only handles foreign or alien networks where a birthday has been provided.
 	// In-network birthdays are handled within local_delivery
 
-	$r = q("SELECT * FROM contact WHERE `bd` != '' AND `bd` != '0000-00-00' AND SUBSTRING(`bd`,1,4) != `bdyear` ");
-	if(count($r)) {
-		foreach($r as $rr) {
+	$r = q("SELECT * FROM `contact` WHERE `bd` != '' AND `bd` > '0001-01-01' AND SUBSTRING(`bd`, 1, 4) != `bdyear` ");
+	if (DBM::is_result($r)) {
+		foreach ($r as $rr) {
 
 			logger('update_contact_birthday: ' . $rr['bd']);
 
-			$nextbd = datetime_convert('UTC','UTC','now','Y') . substr($rr['bd'],4);
+			$nextbd = datetime_convert('UTC','UTC','now','Y') . substr($rr['bd'], 4);
 
-			/**
-			 *
+			/*
 			 * Add new birthday event for this person
 			 *
 			 * $bdtext is just a readable placeholder in case the event is shared
 			 * with others. We will replace it during presentation to our $importer
 			 * to contain a sparkle link and perhaps a photo.
-			 *
 			 */
 
-			$bdtext = sprintf( t('%s\'s birthday'), $rr['name']);
-			$bdtext2 = sprintf( t('Happy Birthday %s'), ' [url=' . $rr['url'] . ']' . $rr['name'] . '[/url]') ;
+			// Check for duplicates
+			$s = q("SELECT `id` FROM `event` WHERE `uid` = %d AND `cid` = %d AND `start` = '%s' AND `type` = '%s' LIMIT 1",
+				intval($rr['uid']),
+				intval($rr['id']),
+				dbesc(datetime_convert('UTC','UTC', $nextbd)),
+				dbesc('birthday'));
 
+			if (DBM::is_result($s)) {
+				continue;
+			}
 
+			$bdtext = sprintf(L10n::t('%s\'s birthday'), $rr['name']);
+			$bdtext2 = sprintf(L10n::t('Happy Birthday %s'), ' [url=' . $rr['url'] . ']' . $rr['name'] . '[/url]') ;
 
-			$r = q("INSERT INTO `event` (`uid`,`cid`,`created`,`edited`,`start`,`finish`,`summary`,`desc`,`type`,`adjust`)
+			q("INSERT INTO `event` (`uid`,`cid`,`created`,`edited`,`start`,`finish`,`summary`,`desc`,`type`,`adjust`)
 				VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%d' ) ",
 				intval($rr['uid']),
 			 	intval($rr['id']),
@@ -492,7 +630,6 @@ function update_contact_birthdays() {
 
 
 			// update bdyear
-
 			q("UPDATE `contact` SET `bdyear` = '%s', `bd` = '%s' WHERE `uid` = %d AND `id` = %d",
 				dbesc(substr($nextbd,0,4)),
 				dbesc($nextbd),