src/app/shared/select/pipes/selected.pipe.ts

/********************************************************************************
 * Copyright (c) 2020 Contributors to the Eclipse Foundation
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0
 *
 * SPDX-License-Identifier: EPL-2.0
 ********************************************************************************/

import {Pipe, PipeTransform} from "@angular/core";
import {ISelectOption} from "../ISelectOption";

@Pipe({name: "selected"})
export class SelectedPipe implements PipeTransform {

    public transform(options: ISelectOption[], selectedId: any, autoSelectFirst?: boolean): ISelectOption {
        if (!Array.isArray(options)) {
            return undefined;
        }

        if (selectedId == null && autoSelectFirst) {
            return options[0];
        }

        if (selectedId == null) {
            return undefined;
        }

        return options.find((o) => o?.value === selectedId);
    }

}