Step 21.20: Implement the upload method

both/methods/images.methods.ts

@@ -0,0 +1,23 @@
+import { UploadFS } from 'meteor/jalik:ufs';
+import { ImagesStore } from '../collections/images.collection';
+
+export function upload(data: File): Promise<any> {
+  return new Promise((resolve, reject) => {
+    // pick from an object only: name, type and size
+    const file = {
+      name: data.name,
+      type: data.type,
+      size: data.size,
+    };
+
+    const upload = new UploadFS.Uploader({
+      data,
+      file,
+      store: ImagesStore,
+      onError: reject,
+      onComplete: resolve
+    });
+
+    upload.start();
+  });
+}