import { OnDestroy } from '@angular/core';
import { TaskContentService } from './task-content.service';
import { TaskHandlingService } from '../../task/services/task-handling-service';
import { Observable, Subject } from 'rxjs';
import { TaskEventNotification } from '../model/task-event-notification';
import * as i0 from "@angular/core";
/**
 * Holds logic about the available operations on a {@link Task} object based on it's state.
 *
 * Beware that it gets the Task from (@link TaskContentService) instance and thus the task might not be always initialized.
 * If the task is not initialized this class cannot work properly.
 */
export declare class TaskEventService extends TaskHandlingService implements OnDestroy {
    protected _taskEventNotifications$: Subject<TaskEventNotification>;
    constructor(_taskContentService: TaskContentService);
    /**
     * Completes the stream
     */
    ngOnDestroy(): void;
    /**
     * Provides information about results of events executed on the managed {@link Task}
     */
    get taskEventNotifications$(): Observable<TaskEventNotification>;
    /**
     * Emits a new {@link TaskEventNotification} into the notifications stream
     * @param event the event information that will be pushed into the stream
     */
    publishTaskEvent(event: TaskEventNotification): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<TaskEventService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TaskEventService>;
}