wisemapping-frontend/packages/mindplot/src/components/Command.ts

/*
*    Copyright [2021] [wisemapping]
*
*   Licensed under WiseMapping Public License, Version 1.0 (the "License").
*   It is basically the Apache License, Version 2.0 (the "License") plus the
*   "powered by wisemapping" text requirement on every single page;
*   you may not use this file except in compliance with the License.
*   You may obtain a copy of the license at
*
*       http://www.wisemapping.org/license
*
*   Unless required by applicable law or agreed to in writing, software
*   distributed under the License is distributed on an "AS IS" BASIS,
*   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*   See the License for the specific language governing permissions and
*   limitations under the License.
*/
import { $defined } from '@wisemapping/core-js';
import CommandContext from './CommandContext';

abstract class Command {
  private _id: number;

  static _uuid: number;

  constructor() {
    this._id = Command._nextUUID();
  }

  abstract execute(commandContext:CommandContext):void;

  abstract undoExecute(commandContext:CommandContext):void;

  getId():number {
    return this._id;
  }

  static _nextUUID() {
    if (!$defined(this._uuid)) {
      this._uuid = 1;
    }
    this._uuid += 1;
    return this._uuid;
  }
}

export default Command;