Переместил получение постов в getPosts.js

getPosts.js

@@ -1,6 +1,7 @@
 import axios from 'axios';
+import ProgressBar from 'progress';
 
-export default async function(owner_id, offset) {
+ async function getPosts(owner_id, offset) {
   const res = await axios.get('https://api.vk.com/method/wall.get', {
     params: {
       access_token: process.env.SERVICE_KEY,
@@ -13,4 +14,37 @@ export default async function(owner_id, offset) {
   });
 
   return res.data.response;
+}
+
+export default async function getAllPosts(owner_id) {
+  let finished = false;
+  let offset = 0;
+  let posts = [];
+  let bar;
+
+  while (!finished) {
+    const response = await getPosts(owner_id, offset);
+    const total = response.count;
+
+    if (!bar) {
+      bar = new ProgressBar(
+        'Getting posts [:bar] :current/:total :percent', 
+        { 
+          total,
+          width: 30,
+        }
+      );
+    }
+    bar.tick(response.items.length);
+
+    posts = posts.concat(response.items);
+    if (posts.length === total) {
+      finished = true;
+    } else {
+      offset += response.items.length;
+      await new Promise(r => setTimeout(r, 5000));
+    }
+  }
+
+  return posts;
 }