plane/web/components/issues/issue-layouts/kanban/block.tsx

import { memo } from "react";
import { Draggable } from "@hello-pangea/dnd";
import isEqual from "lodash/isEqual";
// components
import { KanBanProperties } from "./properties";
// ui
import { Tooltip } from "@plane/ui";
// types
import { IIssueDisplayProperties, IIssue } from "types";
import { EIssueActions } from "../types";
import { useRouter } from "next/router";

interface IssueBlockProps {
  sub_group_id: string;
  columnId: string;
  index: number;
  issue: IIssue;
  isDragDisabled: boolean;
  showEmptyGroup: boolean;
  handleIssues: (sub_group_by: string | null, group_by: string | null, issue: IIssue, action: EIssueActions) => void;
  quickActions: (sub_group_by: string | null, group_by: string | null, issue: IIssue) => React.ReactNode;
  displayProperties: IIssueDisplayProperties | null;
  isReadOnly: boolean;
}

interface IssueDetailsBlockProps {
  sub_group_id: string;
  columnId: string;
  issue: IIssue;
  showEmptyGroup: boolean;
  handleIssues: (sub_group_by: string | null, group_by: string | null, issue: IIssue, action: EIssueActions) => void;
  quickActions: (sub_group_by: string | null, group_by: string | null, issue: IIssue) => React.ReactNode;
  displayProperties: IIssueDisplayProperties | null;
  isReadOnly: boolean;
}

const KanbanIssueDetailsBlock: React.FC<IssueDetailsBlockProps> = (props) => {
  const { sub_group_id, columnId, issue, showEmptyGroup, handleIssues, quickActions, displayProperties, isReadOnly } =
    props;

  const router = useRouter();

  const updateIssue = (sub_group_by: string | null, group_by: string | null, issueToUpdate: IIssue) => {
    if (issueToUpdate) handleIssues(sub_group_by, group_by, issueToUpdate, EIssueActions.UPDATE);
  };

  const handleIssuePeekOverview = () => {
    const { query } = router;

    router.push({
      pathname: router.pathname,
      query: { ...query, peekIssueId: issue?.id, peekProjectId: issue?.project },
    });
  };

  return (
    <>
      {displayProperties && displayProperties?.key && (
        <div className="relative">
          <div className="text-xs line-clamp-1 text-custom-text-300">
            {issue.project_detail.identifier}-{issue.sequence_id}
          </div>
          <div className="absolute -top-1 right-0 hidden group-hover/kanban-block:block">
            {quickActions(
              !sub_group_id && sub_group_id === "null" ? null : sub_group_id,
              !columnId && columnId === "null" ? null : columnId,
              issue
            )}
          </div>
        </div>
      )}
      <Tooltip tooltipHeading="Title" tooltipContent={issue.name}>
        <div className="line-clamp-2 text-sm font-medium text-custom-text-100" onClick={handleIssuePeekOverview}>
          {issue.name}
        </div>
      </Tooltip>
      <div>
        <KanBanProperties
          sub_group_id={sub_group_id}
          columnId={columnId}
          issue={issue}
          handleIssues={updateIssue}
          displayProperties={displayProperties}
          showEmptyGroup={showEmptyGroup}
          isReadOnly={isReadOnly}
        />
      </div>
    </>
  );
};

const validateMemo = (prevProps: IssueDetailsBlockProps, nextProps: IssueDetailsBlockProps) => {
  if (prevProps.issue !== nextProps.issue) return false;
  if (!isEqual(prevProps.displayProperties, nextProps.displayProperties)) {
    return false;
  }
  return true;
};

const KanbanIssueMemoBlock = memo(KanbanIssueDetailsBlock, validateMemo);

export const KanbanIssueBlock: React.FC<IssueBlockProps> = (props) => {
  const {
    sub_group_id,
    columnId,
    index,
    issue,
    isDragDisabled,
    showEmptyGroup,
    handleIssues,
    quickActions,
    displayProperties,
    isReadOnly,
  } = props;

  let draggableId = issue.id;
  if (columnId) draggableId = `${draggableId}__${columnId}`;
  if (sub_group_id) draggableId = `${draggableId}__${sub_group_id}`;

  return (
    <>
      <Draggable draggableId={draggableId} index={index}>
        {(provided, snapshot) => (
          <div
            className="group/kanban-block relative p-1.5 hover:cursor-default"
            {...provided.draggableProps}
            {...provided.dragHandleProps}
            ref={provided.innerRef}
          >
            {issue.tempId !== undefined && (
              <div className="absolute top-0 left-0 w-full h-full animate-pulse bg-custom-background-100/20 z-[99999]" />
            )}
            <div
              className={`text-sm rounded py-2 px-3 shadow-custom-shadow-2xs space-y-2 border-[0.5px] border-custom-border-200 transition-all bg-custom-background-100 ${
                isDragDisabled ? "" : "hover:cursor-grab"
              } ${snapshot.isDragging ? `border-custom-primary-100` : `border-transparent`}`}
            >
              <KanbanIssueMemoBlock
                sub_group_id={sub_group_id}
                columnId={columnId}
                issue={issue}
                showEmptyGroup={showEmptyGroup}
                handleIssues={handleIssues}
                quickActions={quickActions}
                displayProperties={displayProperties}
                isReadOnly={isReadOnly}
              />
            </div>
          </div>
        )}
      </Draggable>
    </>
  );
};