35 lines
1.2 KiB
JavaScript
35 lines
1.2 KiB
JavaScript
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/**
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* @private
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*/
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import Zone from "../zone.js";
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import IANAZone from "../zones/IANAZone.js";
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import FixedOffsetZone from "../zones/fixedOffsetZone.js";
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import InvalidZone from "../zones/invalidZone.js";
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import { isUndefined, isString, isNumber } from "./util.js";
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import SystemZone from "../zones/systemZone.js";
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export function normalizeZone(input, defaultZone) {
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let offset;
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if (isUndefined(input) || input === null) {
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return defaultZone;
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} else if (input instanceof Zone) {
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return input;
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} else if (isString(input)) {
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const lowered = input.toLowerCase();
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if (lowered === "default") return defaultZone;
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else if (lowered === "local" || lowered === "system") return SystemZone.instance;
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else if (lowered === "utc" || lowered === "gmt") return FixedOffsetZone.utcInstance;
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else return FixedOffsetZone.parseSpecifier(lowered) || IANAZone.create(input);
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} else if (isNumber(input)) {
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return FixedOffsetZone.instance(input);
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} else if (typeof input === "object" && "offset" in input && typeof input.offset === "function") {
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// This is dumb, but the instanceof check above doesn't seem to really work
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// so we're duck checking it
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return input;
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} else {
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return new InvalidZone(input);
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}
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}
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