feat:#19 added toast for too many requests

frontend/src/api/createFeed.ts

@@ -1,22 +1,24 @@
 import { Module } from "../model/module.ts";
 
 export async function createIndividualFeed(modules: Module[]): Promise<string> {
-  let token = "";
-
-  await fetch("/api/createFeed", {
-    method: "POST",
-    headers: {
-      "Content-Type": "application/json",
-    },
-    body: JSON.stringify(modules),
-  })
-    .then((response) => {
-      return response.json();
-    })
-    .then((response) => {
-      token = response;
+  try {
+    const response = await fetch("/api/createFeed", {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify(modules),
     });
-  return token;
+
+    if (response.status === 429 || response.status === 500 || response.status != 200) {
+      return Promise.reject(response.statusText);
+    }
+
+    return await response.json();
+  } catch (error) {
+    // Catch possible errors and return an unfilled promise
+    return Promise.reject(error);
+  }
 }
 
 interface FeedResponse {