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from datetime import datetime, time, timedelta
def hms_to_seconds(hms_str):
"""Converts GTFS 'HH:MM:SS' (e.g. '25:30:00') to total seconds from midnight."""
h, m, s = map(int, hms_str.split(':'))
return (h * 3600) + (m * 60) + s
def get_service_day_start_ts():
"""
Returns the Unix timestamp (UTC) for 00:00:00 of the CURRENT service day.
TTC service day flips at 4:00 AM Eastern time (handles DST automatically).
All timestamps are in UTC to match GTFS Realtime timestamps.
"""
from datetime import timezone
try:
# Python 3.9+ has zoneinfo built-in
from zoneinfo import ZoneInfo
eastern_tz = ZoneInfo("America/Toronto")
except ImportError:
# Fallback for older Python versions - use pytz if available
try:
import pytz
eastern_tz = pytz.timezone("America/Toronto")
except ImportError:
# Last resort: hardcoded UTC-5 (EST), no DST handling
now_utc = datetime.now(timezone.utc)
if now_utc.hour < 9: # 4 AM Eastern = 9 AM UTC (EST)
service_date = now_utc.date() - timedelta(days=1)
else:
service_date = now_utc.date()
service_start_utc = datetime.combine(service_date, time.min, tzinfo=timezone.utc) + timedelta(hours=5)
return int(service_start_utc.timestamp())
# Get current UTC time and convert to Eastern
now_utc = datetime.now(timezone.utc)
now_eastern = now_utc.astimezone(eastern_tz)
# TTC service day flips at 4:00 AM Eastern
if now_eastern.hour < 4:
service_date = now_eastern.date() - timedelta(days=1)
else:
service_date = now_eastern.date()
# Create datetime at 00:00:00 Eastern, convert to UTC
try:
# zoneinfo (Python 3.9+)
service_start_eastern = datetime.combine(service_date, time.min, tzinfo=eastern_tz)
except TypeError:
# pytz needs localize
service_start_eastern = eastern_tz.localize(datetime.combine(service_date, time.min))
service_start_utc = service_start_eastern.astimezone(timezone.utc)
return int(service_start_utc.timestamp())
def translate_occupancy(status):
"""Maps GTFS occupancy enums to human readable strings."""
mapping = {
0: "Empty", 1: "Many Seats Available", 2: "Few Seats Available",
3: "No Seats Available", 5: "Full", 6: "Not In Service"
}
return mapping.get(status, "Full") # when in doubt assume the bus is full |