today-session.py

#!/usr/bin/env python3
from typing import TypedDict
from datetime import datetime, timedelta
from json import load


class Session(TypedDict):
    """One session info."""

    duration: int
    """Duration of session in seconds"""
    start: str
    """ISO8601 start date"""
    end: str
    """ISO8601 end date"""


class Stats(TypedDict):
    """[Blade.timetracker](https://marketplace.visualstudio.com/items?itemName=Blade.timetracker)\
    -compatible stats file."""

    total: int
    """Duration of all sessions in seconds"""
    sessions: list[Session]


def load_stats(path: str = ".timetracker") -> Stats:
    """Load Stats from compatible file."""
    with open(path, encoding="ascii") as f:
        stats: Stats = load(f)
        return stats


def calculate_today_stats(stats: Stats) -> int:
    """Calculate today spent time in seconds from stats."""
    spent_seconds = 0
    now = datetime.now().astimezone()
    today444 = now.replace(hour=4, minute=44, second=0, microsecond=0)
    if today444 > now:
        today444 -= timedelta(days=1)
    for session in stats["sessions"]:
        end_date = datetime.fromisoformat(session["end"])
        if end_date < today444:
            continue
        spent_seconds += int(session["duration"])
    return spent_seconds


if __name__ == "__main__":
    print(timedelta(seconds=calculate_today_stats(load_stats())))