fix: Collection creator not written (bad merge from refactor while this branch has been open)

refactor: Move processing to async queue now that file can be loaded from external storage

server/services/importer.js

@@ -0,0 +1,40 @@
+// @flow
+import fs from "fs";
+import os from "os";
+import File from "formidable/lib/file";
+import collectionImporter from "../commands/collectionImporter";
+import type { Event } from "../events";
+import { Attachment, User } from "../models";
+
+export default class Importer {
+  async on(event: Event) {
+    switch (event.name) {
+      case "collections.import": {
+        const { type } = event.data;
+        const attachment = await Attachment.findByPk(event.modelId);
+        const user = await User.findByPk(event.actorId);
+
+        const buffer = await attachment.buffer;
+        const tmpDir = os.tmpdir();
+        const tmpFilePath = `${tmpDir}/upload-${event.modelId}`;
+
+        await fs.promises.writeFile(tmpFilePath, buffer);
+        const file = new File({
+          name: attachment.name,
+          type: attachment.type,
+          path: tmpFilePath,
+        });
+
+        await collectionImporter({
+          file,
+          user,
+          type,
+          ip: event.ip,
+        });
+
+        return;
+      }
+      default:
+    }
+  }
+}