planning

node_modules/dnd-core/lib/reducers/dragOperation.js

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+import { BEGIN_DRAG, PUBLISH_DRAG_SOURCE, HOVER, END_DRAG, DROP, } from '../actions/dragDrop';
+import { REMOVE_TARGET } from '../actions/registry';
+import { without } from '../utils/js_utils';
+const initialState = {
+    itemType: null,
+    item: null,
+    sourceId: null,
+    targetIds: [],
+    dropResult: null,
+    didDrop: false,
+    isSourcePublic: null,
+};
+export function reduce(state = initialState, action) {
+    const { payload } = action;
+    switch (action.type) {
+        case BEGIN_DRAG:
+            return {
+                ...state,
+                itemType: payload.itemType,
+                item: payload.item,
+                sourceId: payload.sourceId,
+                isSourcePublic: payload.isSourcePublic,
+                dropResult: null,
+                didDrop: false,
+            };
+        case PUBLISH_DRAG_SOURCE:
+            return {
+                ...state,
+                isSourcePublic: true,
+            };
+        case HOVER:
+            return {
+                ...state,
+                targetIds: payload.targetIds,
+            };
+        case REMOVE_TARGET:
+            if (state.targetIds.indexOf(payload.targetId) === -1) {
+                return state;
+            }
+            return {
+                ...state,
+                targetIds: without(state.targetIds, payload.targetId),
+            };
+        case DROP:
+            return {
+                ...state,
+                dropResult: payload.dropResult,
+                didDrop: true,
+                targetIds: [],
+            };
+        case END_DRAG:
+            return {
+                ...state,
+                itemType: null,
+                item: null,
+                sourceId: null,
+                dropResult: null,
+                didDrop: false,
+                isSourcePublic: null,
+                targetIds: [],
+            };
+        default:
+            return state;
+    }
+}