modern toc tweaks

quartz/plugins/emitters/contentIndex.ts

@@ -0,0 +1,72 @@
+import { visit } from "unist-util-visit"
+import { QuartzEmitterPlugin } from "../types"
+import { Element } from "hast"
+import path from "path"
+import { trimPathSuffix } from "../../path"
+
+interface Options {
+  indexAnchorLinks: boolean,
+  indexExternalLinks: boolean,
+}
+
+const defaultOptions: Options = {
+  indexAnchorLinks: false,
+  indexExternalLinks: false,
+}
+
+type ContentIndex = Map<string, {
+  title: string,
+  links?: string[],
+  tags?: string[],
+  content: string,
+}> 
+
+export const ContentIndex: QuartzEmitterPlugin<Options> = (userOpts) => {
+  const opts = { ...userOpts, ...defaultOptions }
+  return {
+    name: "ContentIndex",
+    async emit(_contentDir, _cfg, content, _resources, emit) {
+      const fp = "contentIndex"
+      const linkIndex: ContentIndex = new Map()
+      for (const [tree, file] of content) {
+        let slug = trimPathSuffix(file.data.slug!)
+
+        const outgoing: Set<string> = new Set()
+        visit(tree, 'element', (node: Element) => {
+          if (node.tagName === 'a' && node.properties && typeof node.properties.href === 'string') {
+            let dest = node.properties.href
+            if (dest.startsWith(".")) {
+              const normalizedPath = path.normalize(path.join(slug, dest))
+              dest = trimPathSuffix(normalizedPath)
+              outgoing.add(dest)
+            } else if (dest.startsWith("#")) {
+              if (opts.indexAnchorLinks) {
+                outgoing.add(dest)
+              }
+            } else {
+              if (opts.indexExternalLinks) {
+                outgoing.add(dest)
+              }
+            }
+          }
+        })
+
+        linkIndex.set(slug, {
+          title: file.data.frontmatter?.title!,
+          links: [...outgoing],
+          tags: file.data.frontmatter?.tags,
+          content: file.data.text ?? ""
+        })
+      }
+
+      await emit({
+        content: JSON.stringify(Object.fromEntries(linkIndex)),
+        slug: fp,
+        ext: ".json",
+      })
+
+      return [`${fp}.json`]
+    },
+    getQuartzComponents: () => [],
+  }
+}