fix: changed 2 fold operation of member workspace to one time operation and as batch

frontend/src/hooks/api/users/mutation.tsx

@@ -0,0 +1,47 @@
+import { useMutation, useQueryClient } from "@tanstack/react-query";
+
+import {
+  decryptAssymmetric,
+  encryptAssymmetric
+} from "@app/components/utilities/cryptography/crypto";
+import { apiRequest } from "@app/config/request";
+
+import { workspaceKeys } from "../workspace/queries";
+import { AddUserToWsDTO } from "./types";
+
+export const useAddUserToWs = () => {
+  const queryClient = useQueryClient();
+
+  return useMutation<{}, {}, AddUserToWsDTO>({
+    mutationFn: async ({ workspaceId, members, decryptKey, userPrivateKey }) => {
+      // assymmetrically decrypt symmetric key with local private key
+      const key = decryptAssymmetric({
+        ciphertext: decryptKey.encryptedKey,
+        nonce: decryptKey.nonce,
+        publicKey: decryptKey.sender.publicKey,
+        privateKey: userPrivateKey
+      });
+
+      const newWsMembers = members.map(({ orgMembershipId, userPublicKey }) => {
+        const { ciphertext: inviteeCipherText, nonce: inviteeNonce } = encryptAssymmetric({
+          plaintext: key,
+          publicKey: userPublicKey,
+          privateKey: userPrivateKey
+        });
+
+        return {
+          orgMembershipId,
+          workspaceEncryptedKey: inviteeCipherText,
+          workspaceEncryptedNonce: inviteeNonce
+        };
+      });
+      const { data } = await apiRequest.post(`/api/v2/workspace/${workspaceId}/memberships`, {
+        members: newWsMembers
+      });
+      return data;
+    },
+    onSuccess: (_, { workspaceId }) => {
+      queryClient.invalidateQueries(workspaceKeys.getWorkspaceUsers(workspaceId));
+    }
+  });
+};