140 lines
3.8 KiB
Python
140 lines
3.8 KiB
Python
from datetime import datetime, timedelta
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from typing import List, Optional, Tuple
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from astral import LocationInfo, SunDirection, sun
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def collect_day_parts(
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observer: LocationInfo, date: datetime
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) -> List[Tuple[str, datetime, str, str]]:
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"""Collect timestamp for all parts of the day on date"""
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day_parts = []
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midnight = sun.midnight(observer, date=date)
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if midnight.date() < date.date():
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midnight = sun.midnight(observer, date=date + timedelta(days=1))
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elif midnight.date() > date.date():
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midnight = sun.midnight(observer, date=date - timedelta(days=1))
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day_parts.append(('midnight', midnight, 'Night', 'Midnight'))
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try:
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morning_blue_start = sun.blue_hour(
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observer, date=date, direction=SunDirection.RISING
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)[0]
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except ValueError:
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# At certain times and latitudes there might be no blue hour
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pass
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else:
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day_parts.append(
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(
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'morning_blue_start',
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morning_blue_start,
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'Morning blue hour',
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'Morning golden hour',
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)
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)
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try:
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golden_start, golden_end = sun.golden_hour(
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observer, date=date, direction=SunDirection.RISING
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)
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except ValueError:
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# At certain times and latitudes there might be no golden hour
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pass
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else:
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day_parts.append(
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(
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'morning_golden_start',
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golden_start,
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'Morning golden hour',
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'Full Daytime',
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)
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)
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day_parts.append(('morning_golden_end', golden_end, 'Morning', 'Noon'))
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day_parts.append(('noon', sun.noon(observer, date=date), 'Afternoon', 'Noon'))
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try:
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evening_golden_start = sun.golden_hour(
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observer, date=date, direction=SunDirection.SETTING
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)[0]
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except ValueError:
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# At certain times and latitudes there might be no golden hour
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pass
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else:
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day_parts.append(
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(
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'evening_golden_start',
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evening_golden_start,
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'Evening golden hour',
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'Evening blue hour',
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)
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)
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try:
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blue_start, blue_end = sun.blue_hour(
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observer, date=date, direction=SunDirection.SETTING
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)
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except ValueError:
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# At certain times and latitudes there might be no blue hour
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pass
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else:
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day_parts.append(
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('evening_blue_start', blue_start, 'Evening blue hour', 'Night')
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)
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day_parts.append(('evening_blue_end', blue_end, 'Night', 'Midnight'))
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day_parts.sort(key=lambda elem: elem[1])
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return day_parts
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def get_rahukaalam(
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observer: LocationInfo, date: datetime
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) -> Tuple[Optional[bool], datetime]:
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"""Get the time of the next Rāhukāla or, if we are in the middle of one, the time of its end"""
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yesterday = date - timedelta(days=1)
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tomorrow = date + timedelta(days=1)
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times: List[Tuple[datetime, datetime]] = []
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for day in (yesterday, date, tomorrow):
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try:
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daytime_rahukaalam = sun.rahukaalam(observer, date=day, daytime=False)
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except ValueError:
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pass
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else:
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times.append(daytime_rahukaalam)
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try:
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night_rahukaalam = sun.rahukaalam(observer, date=day, daytime=True)
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except ValueError:
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pass
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else:
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times.append(night_rahukaalam)
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times.sort(key=lambda items: items[0])
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active: bool = False
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next_time: Optional[datetime] = None
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for start, end in times:
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if date < start:
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active = False
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next_time = start
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break
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if start < date < end:
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active = True
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next_time = end
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break
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if next_time is None:
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return None, None
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return active, next_time
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