create-task-node-handler.ts

/********************************************************************************
 * Copyright (c) 2022-2023 EclipseSource and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the Eclipse
 * Public License v. 2.0 are satisfied:
 * -- GNU General Public License, version 2 with the GNU Classpath Exception
 * which is available at https://www.gnu.org/software/classpath/license.html
 * -- MIT License which is available at https://opensource.org/license/mit.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR MIT
 ********************************************************************************/
import {
    Command,
    CreateNodeOperation,
    DefaultTypes,
    GNode,
    JsonCreateNodeOperationHandler,
    MaybePromise,
    Point
} from '@eclipse-glsp/server';
import { inject, injectable } from 'inversify';
import * as uuid from 'uuid';
import { Task } from '../model/tasklist-model';
import { TaskListModelState } from '../model/tasklist-model-state';

@injectable()
export class CreateTaskHandler extends JsonCreateNodeOperationHandler {
    readonly elementTypeIds = [DefaultTypes.NODE];

    @inject(TaskListModelState)
    protected override modelState: TaskListModelState;

    override createCommand(operation: CreateNodeOperation): MaybePromise<Command | undefined> {
        return this.commandOf(() => {
            const relativeLocation = this.getRelativeLocation(operation) ?? Point.ORIGIN;
            const task = this.createTask(relativeLocation);
            const taskList = this.modelState.sourceModel;
            taskList.tasks.push(task);
        });
    }

    protected createTask(position: Point): Task {
        const nodeCounter = this.modelState.index.getAllByClass(GNode).length;
        return {
            id: uuid.v4(),
            name: `NewTaskNode${nodeCounter}`,
            position
        };
    }

    get label(): string {
        return 'Task';
    }
}