config_sway/bin/waybar_khal.py

#!/usr/bin/env python
import subprocess
from datetime import date, datetime, timedelta
import json
from html import escape

TEXT_MAX_LEN = 40

today = date.today().strftime("%Y-%m-%d")
days = [ "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday", "Today",
        "Tomorrow" ]

next_week = (date.today() + timedelta(days=10)).strftime("%Y-%m-%d")

title = subprocess.check_output("khal list --format \"{title}\" now "+next_week,
        shell=True).decode("UTF-8").split("\n")
start = subprocess.check_output("khal list --format \"{start}\" now "+next_week,
        shell=True).decode("UTF-8").split("\n")
end = subprocess.check_output("khal list --format \"{end}\" now "+next_week,
        shell=True).decode("UTF-8").split("\n")

text = "-"
tooltip = ""
alt = "idle"
for i in range(len(title)):
    t = escape(title[i])
    s = escape(start[i])
    e = escape(end[i])
    line = ""
    ## header
    if len(t) and t.split(",")[0] in days:
        line = f"\n<b>{t}</b>"
    ## event
    else:
        t_start = s.split(" ")
        t_end = e.split(" ")
        ## all day
        if len(t_start) == 1 or len(t_end) == 1:
            line = f"<i>{t}</i>"
        ## start - end
        else:
            ts_start = datetime.timestamp(datetime.strptime(s, '%Y-%m-%d %H:%M'))
            ts_end = datetime.timestamp(datetime.strptime(e, '%Y-%m-%d %H:%M'))
            ts_now = datetime.timestamp(datetime.now())
            ## today
            if t_start[0] == today:
                ## upcoming or ongoing
                if ts_now < ts_end:
                    ## ongoing
                    if ts_start < ts_now:
                        if ts_start < ts_now and ts_now < ts_end:
                            text = f"{t_start[1]} - {t_end[1]} {t}"
                            alt = "now"
                    ## upcoming
                    elif text == "-":
                        text = f"{t_start[1]} - {t_end[1]} {t}"
                        alt = "today"
            line = f"{t_start[1]} - {t_end[1]}: {t}"
    tooltip += f"\n{line}"


data = {}

if len(text) > TEXT_MAX_LEN:
    text = f"{text[0:TEXT_MAX_LEN]}…"
data["text"] = text
data["alt"] = alt
data["tooltip"] = tooltip

print(json.dumps(data))