How to get the authenticated user in a mutation?

[rshov]

I have registered a mutation in WordPress, and I am calling that mutation from my Faust app. But I am having a problem getting the authenticated user and checking whether that user is an administrator in the mutateAndGetPayload function. The Apollo docs mention checking user capabilities here, but provide no examples of how to access the user.

Is there a way to access the user when called from a Faust app? I assume there is something in the $context but I haven't found anything useful yet.

register_graphql_mutation( 'saveFormMutation', [
    'inputFields' => [
        'formId' => [
            'type' => 'String',
            'description' => 'The form id to update.',
        ],
    ],
    'outputFields' => [
        'success' => [
            'type' => 'Boolean',
            'description' => 'Whether the form was successfully saved.',
        ]
    ],
    'mutateAndGetPayload' => function( $input, $context, $info ) {
        $formId = $input['formId'];

        //TODO: CHECK THAT THE USER IS AUTHENTICATED AND IS AN ADMINISTRATOR

        // These do not work
        // $isAdmin = current_user_can( 'manage_options' );
        // $user = wp_get_current_user();

        // Save form...
        // $success = true;

        return [
            'success' => $success,
        ];
    }
] );

[rshov]

I found the problem. I was not passing the client to the useMutation function.

  const client = getApolloAuthClient()

  const [saveFormMutation, { loading }] = useMutation(
    gql`
      mutation SaveFormMutation($formData: String!, $formId: String) {
        saveFormMutation(input: { formData: $formData, formId: $formId }) {
          success
        }
      }
    `,
    { client }
  )

Once I passed the client, then the regular WordPress functions worked like current_user_can() etc.