feat: Add section caching and retrieval from DocCache

app/pages/+data.ts

@@ -1,6 +1,8 @@
+import type { SectionCache } from "@/services/DocCache";
 import type { PageContext } from "vike/types";
 
 import { useConfig } from "vike-solid/useConfig";
+import { docCache } from "@/services/DocCache";
 import buildTitle from "./buildTitle";
 
 export type Data = Awaited<ReturnType<typeof data>>;
@@ -9,7 +11,7 @@ export async function data(pageContext: PageContext) {
 	const config = useConfig();
 
 	const {
-		exports: { tableOfContents, frontmatter },
+		exports: { frontmatter },
 		urlParsed,
 	} = pageContext;
 	const isRoot = urlParsed.pathname === "/";
@@ -19,7 +21,16 @@ export async function data(pageContext: PageContext) {
 		description: frontmatter?.description,
 	});
 
+	let doc: SectionCache | undefined;
+
+	if (urlParsed.pathname === "/") {
+		doc = docCache.get("index");
+	} else {
+		doc = docCache.get(urlParsed.pathname);
+	}
+
 	return {
-		tableOfContents,
+		sections: doc?.sections || [],
+		frontmatter,
 	};
 }

app/partials/TableOfContents.tsx

@@ -1,5 +1,4 @@
-import type { TableOfContents as TableOfContentsType } from "@/remarkHeadingId";
-import type { Section } from "@/libs/sections";
+import type { DocSection } from "@/services/DocCache";
 import type { Data } from "@/pages/+data";
 
 import { createSignal, createEffect, For } from "solid-js";
@@ -8,31 +7,36 @@ import { Link } from "@/components/Link";
 import clsx from "clsx";
 
 export function TableOfContents() {
-	const { tableOfContents } = useData<Data>();
+	const { sections } = useData<Data>();
+	if (!sections) return null;
 
-	if (!tableOfContents) return null;
+	createEffect(() => {
+		for (const [key, value] of Object.entries(sections)) {
+			console.log(`${key}: ${JSON.stringify(value)}`);
+		}
+	});
 
-	const [currentSection, setCurrentSection] = createSignal(
-		tableOfContents[0]?.id,
-	);
+	const [currentSection, setCurrentSection] = createSignal(sections[0]?.hash);
 
 	const getHeadings = () => {
-		return tableOfContents
+		return sections
 			.map((section) => {
-				const el = document.getElementById(section.id);
+				if (!section.hash) return null;
+
+				const el = document.getElementById(section.hash);
 				if (!el) return null;
 
 				const style = window.getComputedStyle(el);
 				const scrollMt = Number.parseFloat(style.scrollMarginTop);
 
 				const top = window.scrollY + el.getBoundingClientRect().top - scrollMt;
-				return { id: section.id, top };
+				return { id: section.hash, top };
 			})
 			.filter((x): x is { id: string; top: number } => x !== null);
 	};
 
 	createEffect(() => {
-		if (tableOfContents.length === 0) return;
+		if (sections.length === 0) return;
 		const headings = getHeadings();
 
 		function onScroll() {
@@ -51,10 +55,10 @@ export function TableOfContents() {
 		return () => {
 			window.removeEventListener("scroll", onScroll);
 		};
-	}, [getHeadings, tableOfContents]);
+	}, [getHeadings, sections]);
 
-	function isActive(section: Section) {
-		if (section.id === currentSection()) return true;
+	function isActive(section: DocSection) {
+		if (section.hash === currentSection()) return true;
 		return false;
 		// if (!section.children) return false;
 
@@ -72,19 +76,19 @@ export function TableOfContents() {
 				</h2>
 
 				<ol class="mt-4 space-y-3 text-sm">
-					<For each={tableOfContents}>
+					<For each={sections}>
 						{(section) => (
 							<li>
 								<h3>
 									<Link
-										href={`#${section.id}`}
+										href={`#${section.hash}`}
 										class={clsx(
 											isActive(section)
 												? "text-violet-500"
 												: "font-normal text-slate-500 hover:text-slate-700",
 										)}
 									>
-										{section.title}
+										{section.content}
 									</Link>
 								</h3>
 							</li>

app/services/DocCache.ts

@@ -1,4 +1,5 @@
 import type { FlexSearchData } from "./FlexSearchService";
+import type { TableOfContents } from "@/remarkHeadingId";
 import type { Node } from "@markdoc/markdoc";
 
 import { slugifyWithCounter } from "@sindresorhus/slugify";
@@ -7,7 +8,6 @@ import { hrtime } from "node:process";
 import fs from "node:fs/promises";
 import path from "node:path";
 import yaml from "js-yaml";
-import { copyFile } from "node:fs";
 
 const __dirname = path.resolve();
 
@@ -15,12 +15,14 @@ export type SectionCache = {
 	content: string;
 	frontmatter?: SectionFrontmatter;
 	markdocNode: Node;
+	sections: DocSection[];
 };
 
 export type DocSection = {
 	content: string;
 	hash?: string;
 	subsections: string[];
+	level?: number;
 };
 
 type SectionFrontmatter = {
@@ -99,7 +101,12 @@ class DocCache {
 			if (node.type === "heading" && node.attributes?.level <= 2) {
 				const hash = (node.attributes?.id as string) ?? this.slugify(content);
 				const subsections: string[] = [];
-				sections.push({ content, hash, subsections });
+				sections.push({
+					content,
+					hash,
+					subsections,
+					level: node.attributes?.level,
+				});
 			} else {
 				sections.at(-1)?.subsections.push(content);
 			}
@@ -124,9 +131,26 @@ class DocCache {
 		return data;
 	}
 
+	private getTableOfContents(markdocNode: Node) {
+		const sections: DocSection[] = [];
+		this.extractSections(markdocNode, sections);
+
+		return sections;
+	}
+
 	private async cacheFile(file: string): Promise<void> {
 		const [content, frontmatter, markdocNode] = await this.getFileContent(file);
-		this.cache.set(file, { content, frontmatter, markdocNode });
+		const filePath = file
+			.replace(/\+Page\.md(x)?$/, "")
+			.replace(/\/+/, "/")
+			.replace(/\/$/, "");
+
+		this.cache.set(filePath, {
+			content,
+			frontmatter,
+			markdocNode,
+			sections: this.getTableOfContents(markdocNode),
+		});
 	}
 
 	private async populateCache(): Promise<void> {
@@ -157,6 +181,10 @@ class DocCache {
 		return DocCache.getInstance().cache;
 	}
 
+	public getCache(): Map<string, SectionCache> {
+		return this.cache;
+	}
+
 	public get(file: string): SectionCache | undefined {
 		return this.cache.get(file);
 	}