waybar: add calendar with khal, fmt formatting

bin/waybar_khal.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+import subprocess
+import datetime
+import json
+from html import escape
+
+data = {}
+
+today = datetime.date.today().strftime("%Y-%m-%d")
+days = [ "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday", "Today",
+        "Tomorrow" ]
+
+next_week = (datetime.date.today() + datetime.timedelta(days=10)).strftime("%Y-%m-%d")
+
+output = subprocess.check_output("khal list --format \"{title}\" now "+next_week, shell=True)
+output = output.decode("utf-8")
+
+lines = output.split("\n")
+new_lines = []
+for line in lines:
+    clean_line = escape(line).split(" ::")[0]
+    # bold headers
+    if len(clean_line) and clean_line.split(",")[0] in days:
+        clean_line = f"\n<b>{clean_line}</b>"
+    new_lines.append(clean_line)
+output = "\n".join(new_lines).strip()
+
+today_text = datetime.date.today().strftime("%a, %d %b")
+if today in output:
+    event = output.split('\n')[1]
+    data['text'] = f" {today_text}: {event}"
+else:
+    data['text'] = f" {today_text}"
+
+data['tooltip'] = output
+
+print(json.dumps(data))