@tanstack/solid-router/dist/esm/headContentUtils.js

Modern and scalable routing for Solid applications

import { useRouter } from "./useRouter.js";
import { escapeHtml, getAssetCrossOrigin, resolveManifestAssetLink } from "@tanstack/router-core";
import * as Solid from "solid-js";
//#region src/headContentUtils.tsx
/**
* Build the list of head/link/meta/script tags to render for active matches.
* Used internally by `HeadContent`.
*/
var useTags = (assetCrossOrigin) => {
	const router = useRouter();
	const nonce = router.options.ssr?.nonce;
	const getTagKey = (tag) => JSON.stringify(tag);
	const activeMatches = Solid.createMemo(() => router.stores.activeMatchesSnapshot.state);
	const routeMeta = Solid.createMemo(() => activeMatches().map((match) => match.meta).filter(Boolean));
	const meta = Solid.createMemo(() => {
		const resultMeta = [];
		const metaByAttribute = {};
		let title;
		const routeMetasArray = routeMeta();
		for (let i = routeMetasArray.length - 1; i >= 0; i--) {
			const metas = routeMetasArray[i];
			for (let j = metas.length - 1; j >= 0; j--) {
				const m = metas[j];
				if (!m) continue;
				if (m.title) {
					if (!title) title = {
						tag: "title",
						children: m.title
					};
				} else if ("script:ld+json" in m) try {
					const json = JSON.stringify(m["script:ld+json"]);
					resultMeta.push({
						tag: "script",
						attrs: { type: "application/ld+json" },
						children: escapeHtml(json)
					});
				} catch {}
				else {
					const attribute = m.name ?? m.property;
					if (attribute) if (metaByAttribute[attribute]) continue;
					else metaByAttribute[attribute] = true;
					resultMeta.push({
						tag: "meta",
						attrs: {
							...m,
							nonce
						}
					});
				}
			}
		}
		if (title) resultMeta.push(title);
		if (router.options.ssr?.nonce) resultMeta.push({
			tag: "meta",
			attrs: {
				property: "csp-nonce",
				content: router.options.ssr.nonce
			}
		});
		resultMeta.reverse();
		return resultMeta;
	});
	const links = Solid.createMemo(() => {
		const matches = activeMatches();
		const constructed = matches.map((match) => match.links).filter(Boolean).flat(1).map((link) => ({
			tag: "link",
			attrs: {
				...link,
				nonce
			}
		}));
		const manifest = router.ssr?.manifest;
		const assets = matches.map((match) => manifest?.routes[match.routeId]?.assets ?? []).filter(Boolean).flat(1).filter((asset) => asset.tag === "link").map((asset) => ({
			tag: "link",
			attrs: {
				...asset.attrs,
				crossOrigin: getAssetCrossOrigin(assetCrossOrigin, "stylesheet") ?? asset.attrs?.crossOrigin,
				nonce
			}
		}));
		return [...constructed, ...assets];
	});
	const preloadLinks = Solid.createMemo(() => {
		const matches = activeMatches();
		const preloadLinks = [];
		matches.map((match) => router.looseRoutesById[match.routeId]).forEach((route) => router.ssr?.manifest?.routes[route.id]?.preloads?.filter(Boolean).forEach((preload) => {
			const preloadLink = resolveManifestAssetLink(preload);
			preloadLinks.push({
				tag: "link",
				attrs: {
					rel: "modulepreload",
					href: preloadLink.href,
					crossOrigin: getAssetCrossOrigin(assetCrossOrigin, "modulepreload") ?? preloadLink.crossOrigin,
					nonce
				}
			});
		}));
		return preloadLinks;
	});
	const styles = Solid.createMemo(() => activeMatches().map((match) => match.styles).flat(1).filter(Boolean).map(({ children, ...style }) => ({
		tag: "style",
		attrs: {
			...style,
			nonce
		},
		children
	})));
	const headScripts = Solid.createMemo(() => activeMatches().map((match) => match.headScripts).flat(1).filter(Boolean).map(({ children, ...script }) => ({
		tag: "script",
		attrs: {
			...script,
			nonce
		},
		children
	})));
	return Solid.createMemo((prev) => {
		const next = uniqBy([
			...meta(),
			...preloadLinks(),
			...links(),
			...styles(),
			...headScripts()
		], getTagKey);
		if (prev && prev.length === next.length && prev.every((tag, index) => getTagKey(tag) === getTagKey(next[index]))) return prev;
		return next;
	});
};
function uniqBy(arr, fn) {
	const seen = /* @__PURE__ */ new Set();
	return arr.filter((item) => {
		const key = fn(item);
		if (seen.has(key)) return false;
		seen.add(key);
		return true;
	});
}
//#endregion
export { useTags };

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