import {Pipe, PipeTransform} from '@angular/core';
import {PersianNumberService} from '../Services/persian-number.service';

/**
 * Replaces all arabic and english numbers with persian numbers.
 *
 * @example {{englishTextDigit | faNum}}
 */
@Pipe({name: 'faNum'})
export class FaNumPipe implements PipeTransform {

    constructor(private persianNumberService: PersianNumberService) {
    }

    /**
     *
     * @param value a number or string (probably empty).
     * @return a string that all english and arabic numbers in the input has been replaced with persian digits.
     */
    transform(value: string | number): string {
        const strValue = String(value);
        return this.persianNumberService.toPersian(strValue);
    }
}