astro/dist/core/app/common.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

export function toRoutingStrategy(routing, domains) {
	let strategy;
	const hasDomains = domains ? Object.keys(domains).length > 0 : false;
	if (routing === "manual") {
		strategy = "manual";
	} else {
		if (!hasDomains) {
			if (routing?.prefixDefaultLocale === true) {
				if (routing.redirectToDefaultLocale) {
					strategy = "pathname-prefix-always";
				} else {
					strategy = "pathname-prefix-always-no-redirect";
				}
			} else {
				strategy = "pathname-prefix-other-locales";
			}
		} else {
			if (routing?.prefixDefaultLocale === true) {
				if (routing.redirectToDefaultLocale) {
					strategy = "domains-prefix-always";
				} else {
					strategy = "domains-prefix-always-no-redirect";
				}
			} else {
				strategy = "domains-prefix-other-locales";
			}
		}
	}
	return strategy;
}
export function toFallbackType(routing) {
	if (routing === "manual") {
		return "rewrite";
	}
	return routing.fallbackType;
}
const PREFIX_DEFAULT_LOCALE = new Set([
	"pathname-prefix-always",
	"domains-prefix-always",
	"pathname-prefix-always-no-redirect",
	"domains-prefix-always-no-redirect"
]);
const REDIRECT_TO_DEFAULT_LOCALE = new Set(["pathname-prefix-always-no-redirect", "domains-prefix-always-no-redirect"]);
export function fromRoutingStrategy(strategy, fallbackType) {
	let routing;
	if (strategy === "manual") {
		routing = "manual";
	} else {
		routing = {
			prefixDefaultLocale: PREFIX_DEFAULT_LOCALE.has(strategy),
			redirectToDefaultLocale: !REDIRECT_TO_DEFAULT_LOCALE.has(strategy),
			fallbackType
		};
	}
	return routing;
}