import { ColumnDefinition, FilterCondition, IDataFilter } from 'verben-ng-ui';
import { SearchPropertyValue } from '../models/api-payload';
import * as i0 from "@angular/core";
/**
 * Converts filter conditions emitted by the verben-ng-ui filter components into
 * the SearchPropertyValue[] payload the search API expects.
 *
 * Two input shapes are supported. `lib-data-filter` emits `FilterCondition[]`,
 * which carries a columnId and an operator and is the shape the base prefers.
 * `verben-table-filter` emits `IDataFilter[]`, which names the property directly
 * and has no operator; it is kept working so pages can migrate one at a time.
 */
export declare class FilterHandlerService {
    buildFilterPayload<T>(filters: FilterCondition[] | IDataFilter[], columns: ColumnDefinition<T>[]): SearchPropertyValue[];
    private isDataFilter;
    private fromFilterCondition;
    /** Legacy `verben-table-filter` shape: property name and type, no operator. */
    private fromDataFilter;
    /**
     * Inverse of {@link buildFilterPayload}: rebuild FilterCondition[] from a
     * persisted SearchPropertyValue[] (restoring saved filters). Sign-preserving,
     * so re-running buildFilterPayload reproduces the same query.
     */
    buildFilterConditions<T>(payload: SearchPropertyValue[], columns: ColumnDefinition<T>[]): FilterCondition[];
    private mapSignToOperator;
    private mapOperatorToSign;
    /**
     * Carried over from the original workflows.helper.ts so the legacy
     * `verben-table-filter` path keeps producing the same payload types.
     */
    private mapDataFilterType;
    static ɵfac: i0.ɵɵFactoryDeclaration<FilterHandlerService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FilterHandlerService>;
}