import { SGraphCommand } from "@saga-web/graph/lib/commands/SGraphCommand";
import { SGraphItem } from "@saga-web/graph/lib/SGraphItem";
import { SGraphScene } from "@saga-web/graph/lib/SGraphScene";
import { SUndoCommand } from "@saga-web/base/lib";

/**
 * 添加item命令
 *
 * @author  hanyaolong
 * */
export class SGraphDeleteCommand extends SGraphCommand {
    /** 命令item对象    */
    item: SGraphItem;
    /** 命令item的父类   */
    parent: SGraphItem | null;

    /**
     * 构造函数
     *
     * @param   scene   item所在场景
     * @param   item    命令item对象
     * */
    constructor(scene: SGraphScene, item: SGraphItem) {
        super(scene);
        this.item = item;
        this.parent = item.parent;
    } // Constructor

    /**
     * 合并命令
     *
     * @return  boolean 是否已执行合并
     * */
    mergeWith(command: SUndoCommand): boolean {
        return false;
    } // Function mergeWith()

    /**
     * 重做
     *
     * */
    undo(): void {
        this.item.parent = this.parent;
        // @ts-ignore
        this.parent.update();
    } // Function redo()

    /**
     * 撤销
     *
     * */
    redo(): void {
        this.item.parent = null;
        // @ts-ignore
        this.parent.update();
    } // Function undo()
} // Class SGraphAddCommand