Initial commit: Plane

Synced from upstream: 8853637e981ed7d8a6cff32bd98e7afe20f54362

apps/web/core/components/base-layouts/hooks/use-group-drop-target.ts

@@ -0,0 +1,55 @@
+import { useEffect, useRef, useState } from "react";
+import { dropTargetForElements } from "@atlaskit/pragmatic-drag-and-drop/element/adapter";
+
+interface UseGroupDropTargetProps {
+  groupId: string;
+  enableDragDrop?: boolean;
+  onDrop?: (itemId: string, targetId: string | null, sourceGroupId: string, targetGroupId: string) => void;
+}
+
+interface DragSourceData {
+  id: string;
+  groupId: string;
+  type: "ITEM" | "GROUP";
+}
+
+/**
+ * A hook that turns an element into a valid drop target for group drag-and-drop.
+ *
+ * @returns groupRef (attach to the droppable container) and isDraggingOver (for visual feedback)
+ */
+export const useGroupDropTarget = ({ groupId, enableDragDrop = false, onDrop }: UseGroupDropTargetProps) => {
+  const groupRef = useRef<HTMLDivElement | null>(null);
+  const [isDraggingOver, setIsDraggingOver] = useState(false);
+
+  useEffect(() => {
+    const element = groupRef.current;
+    if (!element || !enableDragDrop || !onDrop) return;
+
+    const cleanup = dropTargetForElements({
+      element,
+      getData: () => ({ groupId, type: "GROUP" }),
+
+      canDrop: ({ source }) => {
+        const data = (source?.data || {}) as Partial<DragSourceData>;
+        return data.type === "ITEM" && !!data.groupId && data.groupId !== groupId;
+      },
+
+      onDragEnter: () => setIsDraggingOver(true),
+      onDragLeave: () => setIsDraggingOver(false),
+
+      onDrop: ({ source }) => {
+        setIsDraggingOver(false);
+        const data = (source?.data || {}) as Partial<DragSourceData>;
+        if (data.type !== "ITEM" || !data.id || !data.groupId) return;
+        if (data.groupId !== groupId) {
+          onDrop(data.id, null, data.groupId, groupId);
+        }
+      },
+    });
+
+    return cleanup;
+  }, [groupId, enableDragDrop, onDrop]);
+
+  return { groupRef, isDraggingOver };
+};

apps/web/core/components/base-layouts/hooks/use-layout-state.ts

@@ -0,0 +1,58 @@
+import { useEffect, useRef, useState, useCallback } from "react";
+import { combine } from "@atlaskit/pragmatic-drag-and-drop/combine";
+import { autoScrollForElements } from "@atlaskit/pragmatic-drag-and-drop-auto-scroll/element";
+
+type UseLayoutStateProps =
+  | {
+      mode: "external";
+      externalCollapsedGroups: string[];
+      externalOnToggleGroup: (groupId: string) => void;
+      enableAutoScroll?: boolean;
+    }
+  | {
+      mode?: "internal";
+      enableAutoScroll?: boolean;
+    };
+
+/**
+ * Hook for managing layout state including:
+ * - Collapsed/expanded group tracking (internal or external)
+ * - Auto-scroll setup for drag-and-drop
+ */
+export const useLayoutState = (props: UseLayoutStateProps = { mode: "internal" }) => {
+  const containerRef = useRef<HTMLDivElement | null>(null);
+
+  // Internal fallback state
+  const [internalCollapsedGroups, setInternalCollapsedGroups] = useState<string[]>([]);
+
+  // Stable internal toggle function
+  const internalToggleGroup = useCallback((groupId: string) => {
+    setInternalCollapsedGroups((prev) =>
+      prev.includes(groupId) ? prev.filter((id) => id !== groupId) : [...prev, groupId]
+    );
+  }, []);
+
+  const useExternal = props.mode === "external";
+  const collapsedGroups = useExternal ? props.externalCollapsedGroups : internalCollapsedGroups;
+  const onToggleGroup = useExternal ? props.externalOnToggleGroup : internalToggleGroup;
+
+  // Enable auto-scroll for DnD
+  useEffect(() => {
+    const element = containerRef.current;
+    if (!element || !props.enableAutoScroll) return;
+
+    const cleanup = combine(
+      autoScrollForElements({
+        element,
+      })
+    );
+
+    return cleanup;
+  }, [props.enableAutoScroll]);
+
+  return {
+    containerRef,
+    collapsedGroups,
+    onToggleGroup,
+  };
+};