first commit

common/resources/client/ui/interactions/dnd/drag-state.ts

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+import {DragMonitor} from './use-drag-monitor';
+import {ConnectedDraggable, DraggableId} from './use-draggable';
+import {ConnectedDroppable} from './use-droppable';
+
+export type DragSessionStatus =
+  | 'dropSuccess'
+  | 'dropFail'
+  | 'dragging'
+  | 'inactive';
+
+export interface DragSession {
+  dragTargetId?: DraggableId;
+  status: DragSessionStatus;
+}
+
+export const draggables = new Map<DraggableId, ConnectedDraggable>();
+export const droppables = new Map<DraggableId, ConnectedDroppable>();
+export const dragMonitors = new Map<DraggableId, DragMonitor>();
+export const dragSession: DragSession = {
+  status: 'inactive',
+};