Implement due dates for cards

Signed-off-by: Julius Härtl <jus@bitgrid.net>

js/filters/dateFilters.js

@@ -25,3 +25,33 @@ app.filter('relativeDateFilter', function() {
 		return OC.Util.relativeModifiedDate(timestamp*1000);
 	}
 });
+
+app.filter('relativeDateFilterString', function() {
+	return function (date) {
+		return OC.Util.relativeModifiedDate(Date.parse(date));
+	}
+});
+
+app.filter('dateToTimestamp', function() {
+	return function (date) {
+		return Date.parse(date);
+	}
+});
+
+app.filter('parseDate', function() {
+	return function (date) {
+		if(moment(date).isValid()) {
+			return moment(date).format('YYYY-MM-DD');
+		}
+		return "";
+	}
+});
+
+app.filter('parseTime', function() {
+	return function (date) {
+		if(moment(date).isValid()) {
+			return moment(date).format('HH:mm');
+		}
+		return "";
+	}
+});