Create storage/db.js

storage/db.js

@@ -0,0 +1,20 @@
+const fs = require("fs");
+const path = require("path");
+
+const base = path.join(__dirname, "../data");
+
+function read(file) {
+  const filePath = path.join(base, file);
+  if (!fs.existsSync(filePath)) return [];
+  return JSON.parse(fs.readFileSync(filePath));
+}
+
+function write(file, data) {
+  const filePath = path.join(base, file);
+  const temp = filePath + ".tmp";
+
+  fs.writeFileSync(temp, JSON.stringify(data, null, 2));
+  fs.renameSync(temp, filePath);
+}
+
+module.exports = { read, write };