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

Modern and scalable routing for Solid applications

import { useRouter } from "./useRouter.js";
import { useRouterState } from "./useRouterState.js";
import { escapeHtml } 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 = () => {
	const router = useRouter();
	const nonce = router.options.ssr?.nonce;
	const routeMeta = useRouterState({ select: (state) => {
		return state.matches.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 = useRouterState({ select: (state) => {
		const constructed = state.matches.map((match) => match.links).filter(Boolean).flat(1).map((link) => ({
			tag: "link",
			attrs: {
				...link,
				nonce
			}
		}));
		const manifest = router.ssr?.manifest;
		const assets = state.matches.map((match) => manifest?.routes[match.routeId]?.assets ?? []).filter(Boolean).flat(1).filter((asset) => asset.tag === "link").map((asset) => ({
			tag: "link",
			attrs: {
				...asset.attrs,
				nonce
			}
		}));
		return [...constructed, ...assets];
	} });
	const preloadLinks = useRouterState({ select: (state) => {
		const preloadLinks = [];
		state.matches.map((match) => router.looseRoutesById[match.routeId]).forEach((route) => router.ssr?.manifest?.routes[route.id]?.preloads?.filter(Boolean).forEach((preload) => {
			preloadLinks.push({
				tag: "link",
				attrs: {
					rel: "modulepreload",
					href: preload,
					nonce
				}
			});
		}));
		return preloadLinks;
	} });
	const styles = useRouterState({ select: (state) => state.matches.map((match) => match.styles).flat(1).filter(Boolean).map(({ children, ...style }) => ({
		tag: "style",
		attrs: {
			...style,
			nonce
		},
		children
	})) });
	const headScripts = useRouterState({ select: (state) => state.matches.map((match) => match.headScripts).flat(1).filter(Boolean).map(({ children, ...script }) => ({
		tag: "script",
		attrs: {
			...script,
			nonce
		},
		children
	})) });
	return () => uniqBy([
		...meta(),
		...preloadLinks(),
		...links(),
		...styles(),
		...headScripts()
	], (d) => {
		return JSON.stringify(d);
	});
};
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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