feat: add tag navigation

shared/readingTime.ts

@@ -0,0 +1,30 @@
+import type { BlogParsedContent, StoryParsedContent } from "./types";
+import readingTime from "reading-time";
+
+function countWords(str: string) {
+  let words = 0;
+  for (const c of str) {
+    if (c === " " || c === "/") {
+      words++;
+    }
+  }
+  return words;
+}
+
+function search(obj: Record<string, any>, results: string[] = []) {
+  if (obj.value) {
+    results.push(obj.value);
+  }
+
+  if (obj.children) {
+    for (const el of obj.children) {
+      search(el, results);
+    }
+  }
+  return results;
+}
+
+export function calcReadingTime(doc: BlogParsedContent | StoryParsedContent) {
+  let body: string[] = search(doc.body);
+  return readingTime(body.join(" "));
+}