typia/lib/internal/_randomFormatHostname.mjs

Superfast runtime validators with only one line

import { _randomInteger } from "./_randomInteger.mjs";
import { _randomString } from "./_randomString.mjs";
//#region src/internal/_randomFormatHostname.ts
const _randomFormatHostname = (props) => {
	if (props?.minLength === void 0 && props?.maxLength === void 0) return `${random(10)}.${random(3)}`;
	return _randomHostnameLabels(pickLength(props));
};
const MAX_TOTAL = 253;
const MAX_LABEL = 63;
const pickLength = (props) => {
	let low = props.minLength === void 0 ? 1 : props.minLength;
	if (low < 1) low = 1;
	const high = props.maxLength === void 0 ? Math.min(MAX_TOTAL, low + 14) : Math.min(MAX_TOTAL, props.maxLength);
	if (high < low) throw new Error("unable to generate a random hostname satisfying both the format and the length constraints.");
	return _randomInteger({
		type: "integer",
		minimum: low,
		maximum: high
	});
};
/**
* Builds dot-joined hostname labels totaling exactly `length` characters, each
* label within 63 chars. Shared with the idn-hostname generator, which reserves
* a fixed `.<tld>` suffix and realizes the rest as these leading labels.
*/
const _randomHostnameLabels = (length) => {
	const parts = [];
	let remaining = length;
	while (remaining > 64) {
		parts.push(random(MAX_LABEL));
		remaining -= 64;
	}
	if (remaining <= MAX_LABEL) parts.push(random(remaining));
	else {
		parts.push(random(MAX_LABEL - 1));
		parts.push(random(1));
	}
	return parts.join(".");
};
const random = (length) => _randomString({
	type: "string",
	minLength: length,
	maxLength: length
});
//#endregion
export { _randomFormatHostname, _randomHostnameLabels };

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