plane/web/components/workspace/views/header.tsx

import React, { useEffect, useState } from "react";
import { useRouter } from "next/router";
import Link from "next/link";
import { observer } from "mobx-react-lite";
import { Plus } from "lucide-react";
// store hooks
import { useGlobalView } from "hooks/store";
// components
import { CreateUpdateWorkspaceViewModal } from "components/workspace";
// constants
import { DEFAULT_GLOBAL_VIEWS_LIST } from "constants/workspace";

const ViewTab = observer((props: { viewId: string }) => {
  const { viewId } = props;
  // router
  const router = useRouter();
  const { workspaceSlug, globalViewId } = router.query;
  // store hooks
  const { getViewDetailsById } = useGlobalView();

  const view = getViewDetailsById(viewId);

  if (!view) return null;

  return (
    <Link key={viewId} href={`/${workspaceSlug}/workspace-views/${viewId}`}>
      <span
        id={`global-view-${viewId}`}
        className={`flex min-w-min flex-shrink-0 whitespace-nowrap border-b-2 p-3 text-sm font-medium outline-none ${
          viewId === globalViewId
            ? "border-custom-primary-100 text-custom-primary-100"
            : "border-transparent hover:border-custom-border-200 hover:text-custom-text-400"
        }`}
      >
        {view.name}
      </span>
    </Link>
  );
});

export const GlobalViewsHeader: React.FC = observer(() => {
  // states
  const [createViewModal, setCreateViewModal] = useState(false);
  // router
  const router = useRouter();
  const { workspaceSlug, globalViewId } = router.query;
  // store hooks
  const { currentWorkspaceViews } = useGlobalView();

  // bring the active view to the centre of the header
  useEffect(() => {
    if (!globalViewId) return;

    const activeTabElement = document.querySelector(`#global-view-${globalViewId.toString()}`);

    if (activeTabElement) activeTabElement.scrollIntoView({ behavior: "smooth", inline: "center" });
  }, [globalViewId]);

  const isTabSelected = (tabKey: string) => router.pathname.includes(tabKey);
  return (
    <>
      <CreateUpdateWorkspaceViewModal isOpen={createViewModal} onClose={() => setCreateViewModal(false)} />
      <div className="group relative flex border-b border-custom-border-200">
        <div className="flex w-full items-center overflow-x-auto px-4">
          {DEFAULT_GLOBAL_VIEWS_LIST.map((tab) => (
            <Link key={tab.key} href={`/${workspaceSlug}/workspace-views/${tab.key}`}>
              <span
                className={`flex min-w-min flex-shrink-0 whitespace-nowrap border-b-2 p-3 text-sm font-medium outline-none ${
                  isTabSelected(tab.key)
                    ? "border-custom-primary-100 text-custom-primary-100"
                    : "border-transparent hover:border-custom-border-200 hover:text-custom-text-400"
                }`}
              >
                {tab.label}
              </span>
            </Link>
          ))}

          {currentWorkspaceViews?.map((viewId) => (
            <ViewTab key={viewId} viewId={viewId} />
          ))}
        </div>

        <button
          type="button"
          className="sticky -right-4 flex w-12 flex-shrink-0 items-center justify-center border-transparent bg-custom-background-100 py-3 hover:border-custom-border-200 hover:text-custom-text-400"
          onClick={() => setCreateViewModal(true)}
        >
          <Plus className="h-4 w-4 text-custom-primary-200" />
        </button>
      </div>
    </>
  );
});