Marc Mintel
5397309103
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76 lines
2.7 KiB
Plaintext
76 lines
2.7 KiB
Plaintext
import { InvalidConfiguration } from '../errors/index.js';
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/**
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* Validates a UTC offset string.
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* Only supports the ±HH:mm format (e.g., +05:30, -08:00).
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*
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* Valid ranges: hours -12 to +14, minutes 0-59
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*
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* @returns true if the offset is valid
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*/ const isValidUtcOffset = (value)=>{
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// Strict format check: only ±HH:mm
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const match = value.match(/^([+-])(\d{2}):(\d{2})$/);
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if (!match) {
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return false;
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}
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const sign = match[1] === '+' ? 1 : -1;
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const hours = parseInt(match[2], 10);
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const minutes = parseInt(match[3], 10);
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// Minutes must be 0-59
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if (minutes > 59) {
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return false;
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}
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// Valid range: -12:00 (-720 min) to +14:00 (+840 min)
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const totalMinutes = sign * (hours * 60 + minutes);
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return totalMinutes >= -720 && totalMinutes <= 840;
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};
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/**
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* Checks if a timezone is supported by the current runtime.
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* Supports both IANA timezone names and UTC offset formats.
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*
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* For IANA names: Uses Intl.DateTimeFormat and Intl.supportedValuesOf
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* For UTC offsets: Uses native Date API to validate (±HH:mm format only)
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*/ const isTimezoneSupported = (timezoneValue)=>{
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// UTC is always supported
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if (timezoneValue === 'UTC') {
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return true;
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}
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// Check if it's a UTC offset format (starts with + or -)
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if (timezoneValue.startsWith('+') || timezoneValue.startsWith('-')) {
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return isValidUtcOffset(timezoneValue);
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}
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// For IANA timezone names, use Intl.DateTimeFormat as primary check
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try {
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new Intl.DateTimeFormat('en-US', {
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timeZone: timezoneValue
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});
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return true;
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} catch {
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// DateTimeFormat failed, timezone is not supported
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}
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// Secondary check: verify against supportedValuesOf if available
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if (typeof Intl.supportedValuesOf === 'function') {
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const supportedTimezones = Intl.supportedValuesOf('timeZone');
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if (supportedTimezones.includes(timezoneValue)) {
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return true;
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}
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}
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return false;
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};
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/**
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* Validates that all provided timezones are supported by the current runtime's Intl API.
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* Uses both Intl.DateTimeFormat and Intl.supportedValuesOf for comprehensive validation.
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*
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* @throws InvalidConfiguration if an unsupported timezone is found
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*/ export const validateTimezones = ({ source, timezones })=>{
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if (!timezones?.length) {
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return;
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}
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for (const timezone of timezones){
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if (!isTimezoneSupported(timezone.value)) {
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const sourceText = source ? ` in ${source}` : '';
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throw new InvalidConfiguration(`Timezone ${timezone.value}${sourceText} is not supported by the current runtime via the Intl API.`);
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}
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}
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};
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//# sourceMappingURL=validateTimezones.js.map |