Deleting a collection should detach associated drafts from it (#5082)

Co-authored-by: Tom Moor <tom.moor@gmail.com>

server/queues/tasks/DetachDraftsFromCollectionTask.ts

@@ -0,0 +1,48 @@
+import { Op } from "sequelize";
+import documentMover from "@server/commands/documentMover";
+import { sequelize } from "@server/database/sequelize";
+import { Collection, Document, User } from "@server/models";
+import BaseTask from "./BaseTask";
+
+type Props = {
+  collectionId: string;
+  actorId: string;
+  ip: string;
+};
+
+export default class DetachDraftsFromCollectionTask extends BaseTask<Props> {
+  async perform(props: Props) {
+    const [collection, actor] = await Promise.all([
+      Collection.findByPk(props.collectionId, {
+        paranoid: false,
+      }),
+      User.findByPk(props.actorId),
+    ]);
+
+    if (!actor || !collection || !collection.deletedAt) {
+      return;
+    }
+
+    const documents = await Document.scope("withDrafts").findAll({
+      where: {
+        collectionId: props.collectionId,
+        publishedAt: {
+          [Op.is]: null,
+        },
+      },
+      paranoid: false,
+    });
+
+    return sequelize.transaction(async (transaction) => {
+      for (const document of documents) {
+        await documentMover({
+          document,
+          user: actor,
+          ip: props.ip,
+          collectionId: null,
+          transaction,
+        });
+      }
+    });
+  }
+}