97 lines
2.8 KiB
Python
97 lines
2.8 KiB
Python
#!/usr/bin/env python
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#
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# Custom waybar module for clocks. Implemented because the official clock module was downloading timezone definitions on every boot.
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import datetime
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import json
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import sys
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import time
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from dataclasses import dataclass
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from functools import lru_cache
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from typing import Final, List, Optional
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from zoneinfo import ZoneInfo
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INTERVAL: Final[int] = 10
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LOCAL_TIMEZONE = datetime.datetime.now(datetime.timezone.utc).astimezone().tzinfo
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@dataclass
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class Update:
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text: Optional[str]
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alt: Optional[str]
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tooltip: Optional[str]
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css_class: Optional[List[str]]
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percentage: Optional[str]
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def dump(self) -> str:
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# Dump a dict because we can't name our member variable "class"
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return json.dumps(
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{
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k: v
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for k, v in {
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"text": self.text,
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"alt": self.alt,
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"tooltip": self.tooltip,
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"class": self.css_class,
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"percentage": self.percentage,
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}.items()
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if v is not None
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}
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)
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@lru_cache(maxsize=1)
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def make_calendar(today: datetime.date, tz: datetime.tzinfo):
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width: Final[int] = 20
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start_of_month = today.replace(day=1)
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month_header = today.strftime("%B %Y")
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padding = width - len(month_header)
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right_padding = " " * (padding // 2)
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left_padding = right_padding + (" " if padding % 2 == 1 else "")
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header = f"{left_padding}{month_header}{right_padding}"
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days_of_week = "Su Mo Tu We Th Fr Sa"
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# Make the grid
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first_day_padding = " " * (
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0 if start_of_month.weekday() == 6 else (3 * (1 + start_of_month.weekday())) - 1
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)
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output = f"{header}\n{days_of_week}\n{first_day_padding}"
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print_day = start_of_month
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while print_day.month == today.month:
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if print_day.weekday() == 6:
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output += "\n"
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else:
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output += " "
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output += f"{print_day.day: >2}"
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print_day += datetime.timedelta(days=1)
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return output
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def main():
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tz: Optional[datetime.tzinfo] = (
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ZoneInfo(sys.argv[1]) if len(sys.argv) >= 2 else LOCAL_TIMEZONE
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)
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if tz is None:
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raise Exception("Failed to detect timezone.")
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next_update = time.time()
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while True:
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time_before_next_update = next_update - time.time()
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if time_before_next_update > 0:
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time.sleep(time_before_next_update)
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next_update = time.time() + INTERVAL
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now = datetime.datetime.now(tz=tz)
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text = now.strftime("%Y-%m-%d %H:%M")
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tooltip = make_calendar(now.date(), tz)
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out = Update(
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text=text, alt="foo", tooltip=tooltip, css_class=["foo"], percentage="100"
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)
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print(out.dump(), flush=True)
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if __name__ == "__main__":
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main()
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