chore: WIP simplify data loading

src/utils/markdown/rehype-header-text.ts

@@ -0,0 +1,36 @@
+import { headingRank } from "hast-util-heading-rank";
+import { hasProperty } from "hast-util-has-property";
+import { toString } from "hast-util-to-string";
+import { Root, Parent } from "hast";
+import {visit} from "unist-util-visit";
+
+/**
+ * Plugin to add `data-header-text`s to headings.
+ */
+export const rehypeHeaderText = () => {
+    return (tree: Root, file) => {
+      visit(tree, "element", (node: Parent["children"][number]) => {
+        if (
+          headingRank(node) &&
+          "properties" in node &&
+          node.properties &&
+          !hasProperty(node, "data-header-text")
+        ) {
+          const headerText = toString(node);
+          node.properties["data-header-text"] = headerText;
+
+          const headingWithID = {
+            value: headerText,
+            depth: headingRank(node)!,
+            slug: node.properties["id"] as string,
+          };
+
+          if (file.data.astro.frontmatter.headingsWithId) {
+            file.data.astro.frontmatter.headingsWithId.push(headingWithID)
+          } else {
+            file.data.astro.frontmatter.headingsWithId = [headingWithID];
+          }
+        }
+      });
+    };
+  };