payload/dist/utilities/validateTimezones.js

Node, React, Headless CMS and Application Framework built on Next.js

import { InvalidConfiguration } from '../errors/index.js';
/**
 * Validates a UTC offset string.
 * Only supports the ±HH:mm format (e.g., +05:30, -08:00).
 *
 * Valid ranges: hours -12 to +14, minutes 0-59
 *
 * @returns true if the offset is valid
 */ const isValidUtcOffset = (value)=>{
    // Strict format check: only ±HH:mm
    const match = value.match(/^([+-])(\d{2}):(\d{2})$/);
    if (!match) {
        return false;
    }
    const sign = match[1] === '+' ? 1 : -1;
    const hours = parseInt(match[2], 10);
    const minutes = parseInt(match[3], 10);
    // Minutes must be 0-59
    if (minutes > 59) {
        return false;
    }
    // Valid range: -12:00 (-720 min) to +14:00 (+840 min)
    const totalMinutes = sign * (hours * 60 + minutes);
    return totalMinutes >= -720 && totalMinutes <= 840;
};
/**
 * Checks if a timezone is supported by the current runtime.
 * Supports both IANA timezone names and UTC offset formats.
 *
 * For IANA names: Uses Intl.DateTimeFormat and Intl.supportedValuesOf
 * For UTC offsets: Uses native Date API to validate (±HH:mm format only)
 */ const isTimezoneSupported = (timezoneValue)=>{
    // UTC is always supported
    if (timezoneValue === 'UTC') {
        return true;
    }
    // Check if it's a UTC offset format (starts with + or -)
    if (timezoneValue.startsWith('+') || timezoneValue.startsWith('-')) {
        return isValidUtcOffset(timezoneValue);
    }
    // For IANA timezone names, use Intl.DateTimeFormat as primary check
    try {
        new Intl.DateTimeFormat('en-US', {
            timeZone: timezoneValue
        });
        return true;
    } catch  {
    // DateTimeFormat failed, timezone is not supported
    }
    // Secondary check: verify against supportedValuesOf if available
    if (typeof Intl.supportedValuesOf === 'function') {
        const supportedTimezones = Intl.supportedValuesOf('timeZone');
        if (supportedTimezones.includes(timezoneValue)) {
            return true;
        }
    }
    return false;
};
/**
 * Validates that all provided timezones are supported by the current runtime's Intl API.
 * Uses both Intl.DateTimeFormat and Intl.supportedValuesOf for comprehensive validation.
 *
 * @throws InvalidConfiguration if an unsupported timezone is found
 */ export const validateTimezones = ({ source, timezones })=>{
    if (!timezones?.length) {
        return;
    }
    for (const timezone of timezones){
        if (!isTimezoneSupported(timezone.value)) {
            const sourceText = source ? ` in ${source}` : '';
            throw new InvalidConfiguration(`Timezone ${timezone.value}${sourceText} is not supported by the current runtime via the Intl API.`);
        }
    }
};

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