import { EventEmitter, OnChanges, OnDestroy, OnInit, SimpleChanges } from '@angular/core';
import { AbstractControl, FormBuilder, FormControl, FormGroup } from '@angular/forms';
import { CreateLinkValue, KnoraApiConnection, ReadLinkValue, ReadResource, UpdateLinkValue } from '@dasch-swiss/dsp-js';
import { Subscription } from 'rxjs';
import { BaseValueComponent } from '../base-value.component';
export declare function resourceValidator(control: AbstractControl): {
    invalidType: {
        value: any;
    };
};
export declare class LinkValueComponent extends BaseValueComponent implements OnInit, OnChanges, OnDestroy {
    private _fb;
    private _dspApiConnection;
    displayValue?: ReadLinkValue;
    parentResource: ReadResource;
    propIri: string;
    referredResourceClicked: EventEmitter<ReadLinkValue>;
    referredResourceHovered: EventEmitter<ReadLinkValue>;
    resources: ReadResource[];
    restrictToResourceClass: string;
    valueFormControl: FormControl;
    commentFormControl: FormControl;
    form: FormGroup;
    valueChangesSubscription: Subscription;
    labelChangesSubscription: Subscription;
    customValidators: (typeof resourceValidator)[];
    constructor(_fb: FormBuilder, _dspApiConnection: KnoraApiConnection);
    /**
     * Displays a selected resource using its label.
     *
     * @param resource the resource to be displayed (or no selection yet).
     */
    displayResource(resource: ReadResource | null): string;
    /**
     * Search for resources whose labels contain the given search term, restricting to to the given properties object constraint.
     * this is to be used for update and new linked resources
     *
     * @param searchTerm label to be searched
     */
    searchByLabel(searchTerm: string): void;
    getInitValue(): ReadResource | null;
    standardValueComparisonFunc(initValue: ReadResource, curValue: ReadResource | string | null): boolean;
    ngOnInit(): void;
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
    getNewValue(): CreateLinkValue | false;
    getUpdatedValue(): UpdateLinkValue | false;
    /**
     * Emits the displayValue on click.
     */
    refResClicked(): void;
    /**
     * Emits the displayValue on hover.
     */
    refResHovered(): void;
}