From 8492a5f81836ade66c9877ca49c1d05a82a4cc1a Mon Sep 17 00:00:00 2001
From: Bastian Dehn <hhaalo@arcor.de>
Date: Fri, 17 Dec 2021 18:41:26 +0100
Subject: [PATCH] add: weekdays

---
 cal.js | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/cal.js b/cal.js
index 1092b16..e31a924 100644
--- a/cal.js
+++ b/cal.js
@@ -54,6 +54,33 @@ class StripCalender
 			tr.appendChild(th);
 		}
 	}
+
+	createMonthWeekdayHeader()
+	{
+		let tr = document.createElement("tr");
+		tr.classList.add("row");
+		tr.classList.add("weekday");
+
+		for (let i = 1; i <= 12; i++) {
+			this._date.setMonth(i, 0);
+			this.appendOneMonthWeekdayHeader(tr, this._date.getDate());
+		}
+
+		return tr;
+	}
+
+	appendOneMonthWeekdayHeader(tr, days)
+	{
+		let th = null;
+		const weekday = [ "Mo", "Di", "Mi", "Do", "Fr", "Sa", "So" ]
+
+		for (let i = 1; i <= days; i++) {
+			this._date.setDate(i);
+			th = document.createElement("th");
+			th.innerText = weekday[this._date.getDay()];
+			tr.appendChild(th);
+		}
+	}
 }
 
 function calender()
@@ -64,6 +91,7 @@ function calender()
 
 	table.appendChild(calender.createMonthHeader());
 	table.appendChild(calender.createMonthDaysHeader());
+	table.appendChild(calender.createMonthWeekdayHeader());
 
 	cal.appendChild(table);
 }
-- 
2.39.5