snapshot of https://github.com/makeplane/plane.git @ d868349a55de79979eb8b98701bf1702c67ad634 (2026-09-15)

apps/space/components/issues/issue-layouts/list/list-group.tsx

@@ -0,0 +1,150 @@
+/**
+ * Copyright (c) 2023-present Plane Software, Inc. and contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ * See the LICENSE file for details.
+ */
+
+import type { MutableRefObject } from "react";
+import { Fragment, forwardRef, useRef, useState } from "react";
+import { observer } from "mobx-react";
+import { useTranslation } from "@plane/i18n";
+// plane types
+import type {
+  IGroupByColumn,
+  TIssueGroupByOptions,
+  IIssueDisplayProperties,
+  TPaginationData,
+  TLoader,
+} from "@plane/types";
+// plane utils
+import { cn } from "@plane/utils";
+// hooks
+import { useIntersectionObserver } from "@/hooks/use-intersection-observer";
+//
+import { IssueBlocksList } from "./blocks-list";
+import { HeaderGroupByCard } from "./headers/group-by-card";
+
+interface Props {
+  groupIssueIds: string[] | undefined;
+  group: IGroupByColumn;
+  groupBy: TIssueGroupByOptions | undefined;
+  displayProperties: IIssueDisplayProperties | undefined;
+  containerRef: MutableRefObject<HTMLDivElement | null>;
+  showEmptyGroup?: boolean;
+  loadMoreIssues: (groupId?: string) => void;
+  getGroupIssueCount: (
+    groupId: string | undefined,
+    subGroupId: string | undefined,
+    isSubGroupCumulative: boolean
+  ) => number | undefined;
+  getPaginationData: (groupId: string | undefined, subGroupId: string | undefined) => TPaginationData | undefined;
+  getIssueLoader: (groupId?: string, subGroupId?: string) => TLoader;
+}
+
+// List loader component
+const ListLoaderItemRow = forwardRef(function ListLoaderItemRow(
+  props: Record<string, unknown>,
+  ref: React.ForwardedRef<HTMLDivElement>
+) {
+  return (
+    <div ref={ref} className="flex h-11 items-center justify-between border-b border-subtle p-3">
+      <div className="flex items-center gap-3">
+        <span className="h-5 w-10 animate-pulse rounded-sm bg-layer-1" />
+        <span className={`h-5 w-52 animate-pulse rounded-sm bg-layer-1`} />
+      </div>
+      <div className="flex items-center gap-2">
+        {[...Array(6)].map((_, index) => (
+          <Fragment key={index}>
+            <span key={index} className="h-5 w-5 animate-pulse rounded-sm bg-layer-1" />
+          </Fragment>
+        ))}
+      </div>
+    </div>
+  );
+});
+ListLoaderItemRow.displayName = "ListLoaderItemRow";
+
+export const ListGroup = observer(function ListGroup(props: Props) {
+  const {
+    groupIssueIds = [],
+    group,
+    groupBy,
+    displayProperties,
+    containerRef,
+    showEmptyGroup,
+    loadMoreIssues,
+    getGroupIssueCount,
+    getPaginationData,
+    getIssueLoader,
+  } = props;
+  const [isExpanded, setIsExpanded] = useState(true);
+  const groupRef = useRef<HTMLDivElement | null>(null);
+  // hooks
+  const { t } = useTranslation();
+
+  const [intersectionElement, setIntersectionElement] = useState<HTMLDivElement | null>(null);
+
+  const groupIssueCount = getGroupIssueCount(group.id, undefined, false) ?? 0;
+  const nextPageResults = getPaginationData(group.id, undefined)?.nextPageResults;
+  const isPaginating = !!getIssueLoader(group.id);
+
+  useIntersectionObserver(containerRef, isPaginating ? null : intersectionElement, loadMoreIssues, `100% 0% 100% 0%`);
+
+  const shouldLoadMore =
+    nextPageResults === undefined && groupIssueCount !== undefined && groupIssueIds
+      ? groupIssueIds.length < groupIssueCount
+      : !!nextPageResults;
+
+  const loadMore = isPaginating ? (
+    <ListLoaderItemRow />
+  ) : (
+    <div
+      className={
+        "relative flex h-11 cursor-pointer items-center gap-3 border border-transparent border-t-subtle-1 bg-surface-1 p-3 pl-6 text-13 font-medium text-accent-primary hover:text-accent-secondary hover:underline"
+      }
+      onClick={() => loadMoreIssues(group.id)}
+      role="button"
+    >
+      {t("common.load_more")} &darr;
+    </div>
+  );
+
+  const validateEmptyIssueGroups = (issueCount: number = 0) => {
+    if (!showEmptyGroup && issueCount <= 0) return false;
+    return true;
+  };
+
+  const toggleListGroup = () => {
+    setIsExpanded((prevState) => !prevState);
+  };
+
+  const shouldExpand = (!!groupIssueCount && isExpanded) || !groupBy;
+
+  return validateEmptyIssueGroups(groupIssueCount) ? (
+    <div ref={groupRef} className={cn(`relative flex shrink-0 flex-col border-[1px] border-transparent`)}>
+      <div className="sticky top-0 z-2 w-full shrink-0 border-b border-subtle">
+        <HeaderGroupByCard
+          groupID={group.id}
+          icon={group.icon}
+          title={group.name || ""}
+          count={groupIssueCount}
+          toggleListGroup={toggleListGroup}
+        />
+      </div>
+      {shouldExpand && (
+        <div className="relative">
+          {groupIssueIds && (
+            <IssueBlocksList
+              issueIds={groupIssueIds}
+              groupId={group.id}
+              displayProperties={displayProperties}
+              containerRef={containerRef}
+            />
+          )}
+
+          {shouldLoadMore && (groupBy ? <>{loadMore}</> : <ListLoaderItemRow ref={setIntersectionElement} />)}
+        </div>
+      )}
+    </div>
+  ) : null;
+});