Merge pull request #60 from empress/markdown-headers

Add Markdown Headers to JSON:API output
empress · Sep 25, 2021 · 7e5aade · 7e5aade
2 parents e3763b9 + 5f44bf8
commit 7e5aade
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Showing 4 changed files with 675 additions and 67 deletions.
diff --git a/lib/markdown-to-jsonapi.js b/lib/markdown-to-jsonapi.js
@@ -4,8 +4,9 @@ const showdown = require('showdown');
 const _ = require('lodash');
 const h2p = require('html2plaintext');
 const { Serializer } = require('jsonapi-serializer');
+const { JSDOM } = require('jsdom');
 
-const supportedContentTypes = ['content', 'html', 'description'];
+const supportedContentTypes = ['content', 'html', 'description', 'toc'];
 
 class MarkDownToJsonApi extends PersistentFilter {
   constructor(folder, options) {
@@ -63,12 +64,23 @@ class MarkDownToJsonApi extends PersistentFilter {
   processString(content, relativePath) {
     const front = yamlFront.loadFront(content);
     const markdown = front.__content.trim();
+    const html = this.converter.makeHtml(markdown);
+
+    const dom = new JSDOM(html);
+    const headingNodes = dom.window.document.querySelectorAll('h1, h2, h3, h4, h5');
+
+    const toc = [...headingNodes].map((heading) => ({
+      text: heading.textContent,
+      depth: heading.nodeName.replace(/\D/g, ''),
+      id: heading.getAttribute('id'),
+    }));
 
     const baseProperties = {
       path: relativePath,
       id: relativePath.replace(/\.(md|markdown)$/, ''),
       content: markdown,
-      html: this.converter.makeHtml(markdown),
+      html,
+      toc,
     };
 
     const resultHash = { ...baseProperties, ...front };