import { PersianService } from './persian-service';
import * as i0 from "@angular/core";
/**
 * IsPersian options parameter object should implement this interface. Fields descriptions are in the isPersian method document.
 */
export interface PLOptions {
    persianDigits?: boolean;
    enDigits?: boolean;
    symbols?: boolean;
    whitespaces?: boolean;
}
export declare class PersianLetterService implements PersianService {
    static PERSIAN_LETTERS_PATTERN: string;
    static WHITESPACES_PATTERN: string;
    private static SYMBOLS_PATTERN;
    /**
     * According to the options values, returns a RegExp object. The regex pattern of it contains regex of finding each of
     * elements those specified in the options object plus persian letters.
     *
     * @return a RegExp object that can use in searching a string for special characters (persian letters and others specified in the options)
     * @param options
     */
    private static _stringValidationRegex;
    /**
     * This method gets regex of persian letters and other chars specified in the options and then splits the input value by that regex.
     *
     * If match result is null - there is no match - returns 0. otherwise returns length of the match array that shows number of matched
     * occurred in the input value.
     *
     * @param value
     * @param options
     * @return a number greater equal to 0 representing number of matches occurred in the input value.
     */
    private static _getMatchedPatternLength;
    /**
     * If input value contains any persian letter or is an empty string, returns true. otherwise returns false.
     *
     * @param value
     */
    containsPersian(value: string): boolean;
    /**
     * Checks if input value is a persian text or not. If input value contains any letter that is not persian, the output will be false.
     * Result of validation on existence  of other characters controls by options parameter.
     *
     * @param value
     * @param options controlling validation result on existence  of other characters controls by options parameter. Fields:
     *
     *        persianDigits: if sets to true, validation result will be true if input value contains persian digits plus persian letters.
     *
     *
     *        enDigits: if sets to true, validation result will be true if input value contains english digits plus persian letters
     *
     *
     *        symbols: if sets to true, validation result will be true if input value contains specific symbols plus persian letters.
     *                 symbols list: ?$-/:؟!~"'^_-[]{}()%&*><;
     *
     *
     *        whitespaces: if sets to true, validation result will be true if input value contains white spaces plus persian letters
     *
     *
     * You can combine any number of options field together.
     */
    isPersian(value: string, options?: PLOptions): boolean;
    /**
     * Converts arabic letters: ي and ك to persian corresponding letters.
     *
     * @param value
     */
    toPersian(value: string): string;
    static ɵfac: i0.ɵɵFactoryDeclaration<PersianLetterService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<PersianLetterService>;
}