plane/apps/app/components/core/board-view/board-header.tsx

import React from "react";

// hooks
import useIssuesView from "hooks/use-issues-view";
// icons
import { ArrowsPointingInIcon, ArrowsPointingOutIcon, PlusIcon } from "@heroicons/react/24/outline";
import { getStateGroupIcon } from "components/icons";
// helpers
import { addSpaceIfCamelCase } from "helpers/string.helper";
// types
import { IState } from "types";
type Props = {
  currentState?: IState | null;
  groupTitle: string;
  addIssueToState: () => void;
  isCollapsed: boolean;
  setIsCollapsed: React.Dispatch<React.SetStateAction<boolean>>;
};

export const BoardHeader: React.FC<Props> = ({
  currentState,
  groupTitle,
  addIssueToState,
  isCollapsed,
  setIsCollapsed,
}) => {
  const { groupedByIssues, groupByProperty: selectedGroup } = useIssuesView();

  let bgColor = "#000000";
  if (selectedGroup === "state") bgColor = currentState?.color ?? "#000000";

  if (selectedGroup === "priority")
    groupTitle === "high"
      ? (bgColor = "#dc2626")
      : groupTitle === "medium"
      ? (bgColor = "#f97316")
      : groupTitle === "low"
      ? (bgColor = "#22c55e")
      : (bgColor = "#ff0000");

  return (
    <div
      className={`flex justify-between px-1 ${
        !isCollapsed ? "flex-col rounded-md border bg-gray-50" : ""
      }`}
    >
      <div className={`flex items-center ${!isCollapsed ? "flex-col gap-2" : "gap-1"}`}>
        <div
          className={`flex cursor-pointer items-center gap-x-3 ${
            !isCollapsed ? "mb-2 flex-col gap-y-2 py-2" : ""
          }`}
        >
          {currentState && getStateGroupIcon(currentState.group, "18", "18", bgColor)}
          <h2
            className="text-lg font-semibold capitalize"
            style={{
              writingMode: !isCollapsed ? "vertical-rl" : "horizontal-tb",
            }}
          >
            {selectedGroup === "state"
              ? addSpaceIfCamelCase(currentState?.name ?? "")
              : addSpaceIfCamelCase(groupTitle)}
          </h2>
          <span className="ml-0.5 rounded-full bg-gray-100 py-1 px-3 text-sm">
            {groupedByIssues?.[groupTitle].length ?? 0}
          </span>
        </div>
      </div>

      <div className={`flex items-center ${!isCollapsed ? "flex-col pb-2" : ""}`}>
        <button
          type="button"
          className="grid h-7 w-7 place-items-center rounded p-1 text-gray-700 outline-none duration-300 hover:bg-gray-100"
          onClick={() => {
            setIsCollapsed((prevData) => !prevData);
          }}
        >
          {isCollapsed ? (
            <ArrowsPointingInIcon className="h-4 w-4" />
          ) : (
            <ArrowsPointingOutIcon className="h-4 w-4" />
          )}
        </button>
        <button
          type="button"
          className="grid h-7 w-7 place-items-center rounded p-1 text-gray-700 outline-none duration-300 hover:bg-gray-100"
          onClick={addIssueToState}
        >
          <PlusIcon className="h-4 w-4" />
        </button>
      </div>
    </div>
  );
};