import * as i0 from "@angular/core";
/**
 * For validating Iranian National code (number), you can use this service in your components or every other places using DI or not.
 */
export declare class NationalCodeService {
    /**
     * This method adds zero character at the beginning of the input until the length of the result reach to 10.
     *
     * This method removes spaces from right and left sides of the input.
     *
     * ATTENTION: This method doesn't any validation about correctness of the input if it has correct length (between 8 and 10).
     *
     * @param nationalCode a number with at most 10 digits or a string with at most 10 character.
     * @return a string with length equal to 10.
     * @throws InvalidNationalCodeError when length of the input value is greater than 10.
     */
    normalize(nationalCode: number | string): string;
    /**
     * This method first normalizes the input using `normalize` method and implicitly checks input length, So you DO NOT NEED to
     * normalize input before, but this will not make any bad effect.
     *
     * [Then checking validation of the input using algorithm described in this link]{@link http://www.aliarash.com/article/codemeli/codemeli.htm}
     *
     * @param nationalCode
     */
    isValid(nationalCode: number | string): boolean;
    /**
     *
     * [We are using for loop instead of match or split because it has better performance according to this link]{@link https://stackoverflow.com/a/46312614/5400597}
     *
     * @return true if all characters of the `input` are equal and input length is greater than 1. Otherwise returns false.
     * @param input
     */
    private _isRepetitive;
    static ɵfac: i0.ɵɵFactoryDeclaration<NationalCodeService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NationalCodeService>;
}