refactor(web): 面板管理拖拽管理

web/src/components/modals/GroupDetail/Panel.tsx

@@ -1,13 +1,17 @@
-import React, { useCallback, useMemo } from 'react';
+import React, { useCallback, useMemo, useRef } from 'react';
 import {
   GroupPanelType,
   useGroupInfo,
   GroupPanel as GroupPanelInfo,
+  showToasts,
 } from 'tailchat-shared';
 import { Tree } from 'antd';
 import type { NodeDragEventParams } from 'rc-tree/lib/contextTypes';
 import type { DataNode, EventDataNode } from 'antd/lib/tree';
 import type { Key } from 'rc-tree/lib/interface';
+import type { AllowDrop } from 'rc-tree/lib/Tree';
+import _cloneDeep from 'lodash/cloneDeep';
+import _isNil from 'lodash/isNil';
 
 /**
  * 将一维的面板列表构筑成立体的数组
@@ -31,12 +35,63 @@ function buildTreeDataWithGroupPanel(
     }));
 }
 
-export const GroupPanel: React.FC<{
-  groupId: string;
-}> = React.memo((props) => {
-  const groupId = props.groupId;
-  const groupInfo = useGroupInfo(groupId);
-  const groupPanels = groupInfo?.panels ?? [];
+/**
+ * 重新构建面板顺序
+ */
+function rebuildGroupPanelOrder(
+  groupPanels: GroupPanelInfo[]
+): GroupPanelInfo[] {
+  const originGroupPanels = _cloneDeep(groupPanels);
+  const newPanel = originGroupPanels.filter((panel) => _isNil(panel.parentId)); // 第一层
+  const len = newPanel.length;
+  for (let i = len - 1; i >= 0; i--) {
+    const currentId = newPanel[i].id;
+    newPanel.splice(
+      i + 1,
+      0,
+      ...originGroupPanels.filter((p) => p.parentId === currentId)
+    );
+  }
+
+  return newPanel;
+}
+
+interface GroupPanelTree {
+  groupPanels: GroupPanelInfo[];
+  onChange: (newGroupPanels: GroupPanelInfo[]) => void;
+}
+/**
+ * 仅同层级相互拉的树形结构
+ */
+const GroupPanelTree: React.FC<GroupPanelTree> = React.memo((props) => {
+  const draggingNode = useRef<DataNode | null>(null);
+  const treeData: DataNode[] = useMemo(
+    () => buildTreeDataWithGroupPanel(props.groupPanels),
+    [props.groupPanels]
+  );
+
+  const handleDragStart = useCallback(
+    (info: NodeDragEventParams<HTMLDivElement>) => {
+      draggingNode.current = info.node;
+    },
+    []
+  );
+
+  const handleDragEnd = useCallback(() => {
+    draggingNode.current = null;
+  }, []);
+
+  const handleAllowDrop = useCallback(
+    ({ dropNode, dropPosition }: Parameters<AllowDrop>[0]) => {
+      if (dropPosition === 0 && draggingNode.current?.isLeaf === false) {
+        // 不允许容器之间产生父子节点
+        return false;
+      }
+
+      return dropNode.isLeaf === draggingNode.current?.isLeaf;
+    },
+    []
+  );
 
   const handleDrop = useCallback(
     (
@@ -47,25 +102,84 @@ export const GroupPanel: React.FC<{
         dropToGap: boolean;
       }
     ) => {
-      // TODO
-      console.log(info);
+      const newGroupPanels = _cloneDeep(props.groupPanels);
+      const dropNodePos = newGroupPanels.findIndex(
+        (panel) => panel.id === info.node.key
+      );
+      const dropGroupPanel = newGroupPanels[dropNodePos];
+      if (dropNodePos === -1) {
+        showToasts('异常, 目标节点未找到', 'error');
+      }
+
+      const dragPanelPos = newGroupPanels.findIndex(
+        (panel) => panel.id === info.dragNode.key
+      );
+
+      if (draggingNode.current?.isLeaf === true && info.node.isLeaf === true) {
+        // 如果是面板且目标也是面板
+        // 则更新它的父节点id
+        info.dragNodesKeys
+          // 获取所有的移动节点的位置
+          .map((key) => newGroupPanels.findIndex((panel) => panel.id === key))
+          // 过滤掉没找到的
+          .filter((index) => index !== -1)
+          .forEach((pos) => {
+            newGroupPanels[pos].parentId = dropGroupPanel.parentId;
+          });
+      }
+
+      if (info.node.dragOverGapTop === true) {
+        // 移动到目标节点之前
+        newGroupPanels.splice(
+          dropNodePos,
+          0,
+          newGroupPanels.splice(dragPanelPos, 1)[0]
+        );
+      } else if (info.node.dragOverGapBottom === true) {
+        // 移动到目标节点之后
+        newGroupPanels.splice(
+          dragPanelPos,
+          0,
+          newGroupPanels.splice(dropNodePos, 1)[0]
+        );
+      }
+
+      if (typeof props.onChange === 'function') {
+        props.onChange(rebuildGroupPanelOrder(newGroupPanels));
+      }
     },
-    []
+    [props.groupPanels, props.onChange]
   );
 
-  const treeData: DataNode[] = useMemo(
-    () => buildTreeDataWithGroupPanel(groupPanels),
-    [groupPanels]
+  return (
+    <Tree
+      treeData={treeData}
+      defaultExpandAll={true}
+      draggable={true}
+      onDrop={handleDrop}
+      // TODO: 待简化 https://github.com/react-component/tree/pull/482
+      onDragStart={handleDragStart}
+      onDragEnd={handleDragEnd}
+      allowDrop={handleAllowDrop}
+    />
   );
+});
+GroupPanelTree.displayName = 'GroupPanelTree';
+
+export const GroupPanel: React.FC<{
+  groupId: string;
+}> = React.memo((props) => {
+  const groupId = props.groupId;
+  const groupInfo = useGroupInfo(groupId);
+  const groupPanels = groupInfo?.panels ?? [];
+
+  const handleChange = useCallback((newGroupPanels: GroupPanelInfo[]) => {
+    console.log('newGroupPanels', newGroupPanels);
+  }, []);
 
   return (
     <div>
-      <Tree
-        treeData={treeData}
-        defaultExpandAll={true}
-        draggable={true}
-        onDrop={handleDrop}
-      />
+      <GroupPanelTree groupPanels={groupPanels} onChange={handleChange} />
     </div>
   );
 });