From 1442d052713fdb380810692bbe1ddee5306b5a7a Mon Sep 17 00:00:00 2001
From: Jason Woofenden <jason183@herkamire.com>
Date: Wed, 3 Oct 2007 18:25:11 -0400
Subject: [PATCH] new date-mangling functions

---
 calendar.php |    4 ++--
 time.php     |   75 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+), 2 deletions(-)

diff --git a/calendar.php b/calendar.php
index be81f98..9d109a6 100644
--- a/calendar.php
+++ b/calendar.php
@@ -71,7 +71,7 @@ function calendar($year, $month, $events = 0, $template = 0) {
 	$template->set('month_year', strftime('%B', $start_timestamp) . " " . $year);
 
 	# number of non-day slots at the begining of the month
-	$pre_non_days = date( 'w', $start_timestamp );
+	$pre_non_days = date('w', $start_timestamp );
 
 	# first display empty cells so the 1st can be in the right column
 	while($cell < $pre_non_days) {
@@ -80,7 +80,7 @@ function calendar($year, $month, $events = 0, $template = 0) {
 	}
 
 	# do the days in this month
-	$days_count = date( 't', $start_timestamp );
+	$days_count = date('t', $start_timestamp );
 	for($day = 1; $day <= $days_count; $day++ ) {
 		$template->set('day_number', $day);
 		if(($cell + 1) % 7 < 2) {
diff --git a/time.php b/time.php
index 501d89c..b9181b0 100644
--- a/time.php
+++ b/time.php
@@ -45,3 +45,78 @@ function days_to_weekday_name($days) {
 #		echo ", ymd_to_days($year, $month, $day): $days\n<br>";
 #	}
 #}
+
+
+# pass anything, and get a valid date
+#
+# returns array($year, $month, $day)
+function clean_ymd($year, $month, $day) {
+	$year = intval($year, 10);
+	$month = intval($month, 10);
+	$day = intval($day, 10);
+
+	if($year < 100) {
+		$year += 2000;
+	}
+	if($month < 1) {
+		$month = 1;
+	} elseif($month > 12) {
+		$month = 12;
+	}
+	if($day < 1) {
+		$day = 1;
+	} elseif($day > 31) {
+		# FIXME this should check the month
+		$day = 31;
+	}
+
+	return array($year, $month, $day);
+}
+
+# convert date string from mm/dd/yyyy to yyy-mm-dd
+function mdy_to_ymd($date) {
+	$date = ereg_replace('[^0-9/-]', '', $date);
+	$date = ereg_replace('-', '/', $date);
+	$parts = explode('/', $date);
+	switch(count($parts)) {
+		case 1:
+			$year = $parts[0];
+			list($month, $day) = explode('/', date('m/d'));
+		break;
+		case 2:
+			list($month, $year) = $parts;
+			$year = date('d');
+		break;
+		default:
+			list($month, $day, $year) = $parts;
+	}
+
+	list($year, $month, $day) = clean_ymd($year, $month, $day);
+
+	return sprintf('%04u-%02u-%02u', $year, $month, $day);
+}
+
+# convert date string from yyy-mm-dd to mm/dd/yyyy
+function ymd_to_mdy($date) {
+	$date = ereg_replace('[^0-9/-]', '', $date);
+	$date = ereg_replace('/', '-', $date);
+	$parts = explode('-', $date);
+	switch(count($parts)) {
+		case 1:
+			$year = $parts[0];
+			list($month, $day) = explode('-', date('m-d'));
+		break;
+		case 2:
+			list($year, $month) = $parts;
+			$year = date('d');
+		break;
+		default:
+			list($year, $month, $day) = $parts;
+	}
+
+	list($year, $month, $day) = clean_ymd($year, $month, $day);
+
+	return sprintf('%02u/%02u/%04u', $month, $day, $year);
+}
+
+?>
-- 
1.7.10.4