Making file check more efficent.

index.js

@@ -311,7 +311,8 @@ ipcMain.handle('download_file', async (event, api_base_url, api_endpoint, full_s
             overwrite_existing = true;
         } else {
             console.log(`Temp download file has not expired yet. Expire after: ${offset_minutes} minutes`);
-            return false;
+            // return false;
+            return 'tmp';
         }
     }
     if (fs.existsSync(full_save_path)) {
@@ -339,7 +340,8 @@ ipcMain.handle('download_file', async (event, api_base_url, api_endpoint, full_s
     console.log('Endpoints in Progress:', endpoints_in_progress);
     if (endpoints_in_progress.includes(api_endpoint)) {
         console.log(`Endpoint already being downloaded: ${api_endpoint}`);
-        return false;
+        // return false;
+        return 'in_progress';
     }
     // console.log(`Done with checks. Time to download! Endpoint: ${api_endpoint}`);
     endpoints_in_progress.push(api_endpoint);