Add promise functions for fs

Author: CompuIves

packages/app/src/app/utils/fs.ts

@@ -0,0 +1,30 @@
+import * as fs from 'fs';
+
+export function readFilePromise(
+  path: string | number | Buffer | import('url').URL,
+  options?: { encoding?: string; flag?: string }
+): Promise<string | Buffer> {
+  return new Promise((resolve, reject) => {
+    fs.readFile(path, options, (err, data) => {
+      if (err) {
+        reject(err);
+        return;
+      }
+
+      resolve(data);
+    });
+  });
+}
+
+export function readdirPromise(path: fs.PathLike): Promise<string[]> {
+  return new Promise((resolve, reject) => {
+    fs.readdir(path, (err, files) => {
+      if (err) {
+        reject(err);
+        return;
+      }
+
+      resolve(files);
+    });
+  });
+}