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import { parseISO, isValid } from 'date-fns';
import { zonedTimeToUtc, utcToZonedTime } from 'date-fns-tz';
export const getDeadlineInLocalTime = (deadline: string | undefined, timezone: string | undefined): Date | null => {
if (!deadline || deadline === 'TBD') {
console.log('Early return - deadline is null or TBD:', { deadline, timezone });
return null;
}
try {
console.log('Processing conference deadline:', {
conferenceName: 'Unknown', // We could pass this as a parameter if helpful
deadline,
timezone,
deadlineType: typeof deadline,
timezoneType: typeof timezone
});
// Parse the deadline string to a Date object
const deadlineDate = parseISO(deadline);
console.log('Parsed deadline date:', {
original: deadline,
parsed: deadlineDate,
isValid: isValid(deadlineDate),
timestamp: deadlineDate.getTime(),
toISOString: deadlineDate.toISOString()
});
if (!isValid(deadlineDate)) {
console.error('Invalid date parsed from deadline:', deadline);
return null;
}
// Handle AoE (Anywhere on Earth) timezone
if (timezone === 'AoE') {
console.log('Converting AoE to UTC-12');
return new Date(deadlineDate.getTime() - 12 * 60 * 60 * 1000);
}
// Handle UTC offset timezones (e.g., "UTC-12", "UTC+01", "UTC+0")
const normalizeTimezone = (tz: string | undefined): string => {
if (!tz) {
console.log('No timezone provided, using UTC');
return 'UTC';
}
console.log('Normalizing timezone:', tz);
// If it's already an IANA timezone, return as is
if (!tz.toUpperCase().startsWith('UTC')) {
console.log('Using IANA timezone:', tz);
return tz;
}
// Convert UTC±XX to proper format
const match = tz.match(/^UTC([+-])(\d+)$/);
if (match) {
const [, sign, hours] = match;
const paddedHours = hours.padStart(2, '0');
const normalized = `${sign}${paddedHours}:00`;
console.log('Normalized UTC offset:', { original: tz, normalized });
return normalized;
}
// Handle special case of UTC+0/UTC-0
if (tz === 'UTC+0' || tz === 'UTC-0' || tz === 'UTC+00' || tz === 'UTC-00') {
console.log('Handling UTC+0/-0 case:', tz);
return 'UTC';
}
console.log('Falling back to UTC for timezone:', tz);
return 'UTC';
};
const normalizedTimezone = normalizeTimezone(timezone);
console.log('Using timezone:', { original: timezone, normalized: normalizedTimezone });
try {
// Create date in the conference's timezone
const dateInConfTimezone = utcToZonedTime(deadlineDate, normalizedTimezone);
console.log('Conference timezone date:', {
date: dateInConfTimezone,
isValid: isValid(dateInConfTimezone),
timezone: normalizedTimezone
});
// Get user's local timezone
const userTimezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
// Convert to user's local timezone
const localDate = utcToZonedTime(dateInConfTimezone, userTimezone);
console.log('Local timezone date:', {
date: localDate,
isValid: isValid(localDate),
timezone: userTimezone
});
if (!isValid(localDate)) {
console.error('Invalid date after timezone conversion:', {
original: deadline,
timezone,
normalizedTimezone,
localDate
});
return null;
}
return localDate;
} catch (tzError) {
console.error('Timezone conversion error:', {
error: tzError,
deadline,
timezone,
normalizedTimezone
});
return deadlineDate;
}
} catch (error) {
console.error('Error parsing deadline:', {
error,
deadline,
timezone
});
return null;
}
}; |