Asymmetrik/ngx-starter

import { Injectable } from '@angular/core';

import { NgbDateAdapter, NgbDateStruct } from '@ng-bootstrap/ng-bootstrap';
import isInteger from 'lodash/isInteger';

/**
 * [`NgbDateAdapter`](#/components/datepicker/api#NgbDateAdapter) implementation that uses
 * native javascript dates as a user date model.
 */

// eslint-disable-next-line @angular-eslint/use-injectable-provided-in
@Injectable()
export class NgbDateCustomAdapter extends NgbDateAdapter<Date> {
    /**
     * Converts a native `Date` to a `NgbDateStruct`.
     */
    fromModel(date: number | Date | string | null): NgbDateStruct | null {
        if (date && !(date instanceof Date)) {
            date = new Date(date);
        }
        return date instanceof Date && !isNaN(date.getTime()) ? this._fromNativeDate(date) : null;
    }

    /**
     * Converts a `NgbDateStruct` to a native `Date`.
     */
    toModel(date: NgbDateStruct | null): Date | null {
        return date && isInteger(date.year) && isInteger(date.month) && isInteger(date.day)
            ? this._toNativeDate(date)
            : null;
    }

    protected _fromNativeDate(date: Date): NgbDateStruct {
        return { year: date.getFullYear(), month: date.getMonth() + 1, day: date.getDate() };
    }

    protected _toNativeDate(date: NgbDateStruct): Date {
        const jsDate = new Date(date.year, date.month - 1, date.day, 12);
        // avoid 30 -> 1930 conversion
        jsDate.setFullYear(date.year);
        return jsDate;
    }
}