feat: Version 2

Closes #627, closes #1047

server/api/helpers/users/is-board-subscriber.js

@@ -0,0 +1,26 @@
+/*!
+ * Copyright (c) 2024 PLANKA Software GmbH
+ * Licensed under the Fair Use License: https://github.com/plankanban/planka/blob/master/LICENSE.md
+ */
+
+module.exports = {
+  inputs: {
+    id: {
+      type: 'string',
+      required: true,
+    },
+    boardId: {
+      type: 'string',
+      required: true,
+    },
+  },
+
+  async fn(inputs) {
+    const boardSubscription = await BoardSubscription.qm.getOneByBoardIdAndUserId(
+      inputs.boardId,
+      inputs.id,
+    );
+
+    return !!boardSubscription;
+  },
+};