function bp_nouveau_ajax_mark_activity_favorite() {
	if ( ! bp_is_post_request() ) {
		wp_send_json_error();
	}

	// Nonce check!
	if ( empty( $_POST['nonce'] ) || ! wp_verify_nonce( $_POST['nonce'], 'bp_nouveau_activity' ) ) {
		wp_send_json_error();
	}

	$activity_id   = (int) $_POST['id'];
	$activity_item = new BP_Activity_Activity( $activity_id );
	if ( ! bp_activity_user_can_read( $activity_item, bp_loggedin_user_id() ) ) {
		wp_send_json_error();
	}

	if ( bp_activity_add_user_favorite( $_POST['id'] ) ) {
		$response = array( 'content' => __( 'Remove Favorite', 'buddypress' ) );

		if ( ! bp_is_user() ) {
			$fav_count = (int) bp_get_total_favorite_count_for_user( bp_loggedin_user_id() );

			if ( 1 === $fav_count ) {
				$response['directory_tab'] = '<li id="activity-favorites" data-bp-scope="favorites" data-bp-object="activity">
					<a href="' . bp_loggedin_user_domain() . bp_nouveau_get_component_slug( 'activity' ) . '/favorites/">
						' . esc_html__( 'My Favorites', 'buddypress' ) . '
					</a>
				</li>';
			} else {
				$response['fav_count'] = $fav_count;
			}
		}

		wp_send_json_success( $response );
	} else {
		wp_send_json_error();
	}
}