39 lines
1.0 KiB
TypeScript
39 lines
1.0 KiB
TypeScript
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import { Node } from '../../../domain/models/Node';
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import { BaseCommand } from '../BaseCommand';
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import { ITreeState } from '../ITreeState';
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/**
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* 删除节点命令
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*/
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export class DeleteNodeCommand extends BaseCommand {
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private deletedNode: Node | null = null;
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constructor(
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private readonly state: ITreeState,
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private readonly nodeId: string
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) {
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super();
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}
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execute(): void {
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const tree = this.state.getTree();
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this.deletedNode = tree.getNode(this.nodeId);
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const newTree = tree.removeNode(this.nodeId);
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this.state.setTree(newTree);
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}
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undo(): void {
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if (!this.deletedNode) {
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throw new Error('无法撤销：未保存已删除的节点');
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}
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const tree = this.state.getTree();
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const newTree = tree.addNode(this.deletedNode);
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this.state.setTree(newTree);
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}
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getDescription(): string {
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return `删除节点: ${this.deletedNode?.template.displayName ?? this.nodeId}`;
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}
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}
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