initial feed implementation

src/plugins/remark.js

@@ -1,19 +1,48 @@
 import { visit } from 'unist-util-visit';
 import { toString } from 'mdast-util-to-string';
 
+import fs from 'node:fs';
 
 // build table of contents and inject into frontmatter
 export function localRemark() {
     return (tree, vfile) => {
         let toc = [];
+        let description = null;
         
-        visit(tree, 'heading', node => {
-            toc.push({
-                text: toString(node),
-                depth: node.depth,
-            });
+        visit(tree, ['heading', 'paragraph'], node => {
+            // build table of contents and inject into frontmatter
+            if (node.type === 'heading') {
+                toc.push({
+                    text: toString(node),
+                    depth: node.depth,
+                });
+            }
+
+            // inject description (first 25 words of the first paragraph)
+            if (node.type === 'paragraph' && description === null) {
+                description = summarize(node);
+            }
         });
 
         vfile.data.fm.toc = toc;
+        vfile.data.fm.description = description;
     }
 }
+
+
+// convert paragraph to single string after stripping everything between html tags
+function summarize(par) {
+    let newChildren = [];
+    let push = true;
+    for (const child of par.children) {
+        if (child.type === 'html') {
+            push = !push;
+            continue;
+        }
+        if (push) {
+            newChildren.push(child);
+        }
+    }
+
+    return toString({type: 'paragraph', children: newChildren});
+}