گولنگ و پی اچ پی اعتبار سنجی کارت عابر بانک ایران در جاوا اسکریپت , Iranian bank cards validator function, Javascript Golang php ,تابع تشخیص صحت کارت عابربانک

validateCard.js

"use strict";
// By Mahmoud Eskandari @ MIT license
function validateCard(card) {
  if (typeof card === 'undefined'
    || card === null
    || card.length !== 16) {
    return false;
  }
  let cardTotal = 0;
  for (let i = 0; i < 16; i += 1) {
    const c = Number(card[i]);
    if (i % 2 === 0) {
      cardTotal += ((c * 2 > 9) ? (c * 2) - 9 : (c * 2));
    } else {
      cardTotal += c;
    }
  }
  return (cardTotal % 10 === 0);
}

و این هم تبدیلش به PHP

function validateCardNumber($cardNumber) {
    if(empty($cardNumber) || strlen($cardNumber) !== 16) {
        return false;
    }
    $cardToArr = str_split($cardNumber);
    $cardTotal = 0;
    for($i = 0; $i<16; $i++) {
        $c = (int)$cardToArr[$i];
        if($i % 2 === 0) {
            $cardTotal += (($c * 2 > 9) ? ($c * 2) - 9 : ($c * 2));
        } else {
            $cardTotal += $c;
        }
    }
    return ($cardTotal % 10 === 0);
}

python

def card_validate(value):
    if not len(value) == 16:
        raise "The card did not validate"

    items = []
    for i in range(0, len(value)):
        k = ((i + 1) % 2) + 1
        r = k * int(value[i])
        items.append(r - 9 if r >= 10 else r)

    if sum(items) % 10 != 0:
        raise "The card did not validate"

The same thing implemented in class-validator . In the following piece of code I write a custom decorator to do the same thing:

is-valid-card-number.decorator.ts:

import {
    registerDecorator,
    ValidationArguments,
    ValidationOptions,
    ValidatorConstraint,
    ValidatorConstraintInterface,
} from 'class-validator';

export const isNil = (value: any) => {
    if (value === undefined || value === null) {
        return true;
    }
    return false;
};

export function IsValidCardNumber(
    validationArguments?: ValidationOptions,
) {
    return function (object: Object, propertyName: string) {
        registerDecorator({
            name: 'IsValidCardNumber',
            propertyName,
            target: object.constructor,
            async: false,
            options: validationArguments,
            validator: IsValidCardNumberConstraint,
        });
    };
}

@ValidatorConstraint({ name: 'IsValidCardNumber', async: false })
export class IsValidCardNumberConstraint
    implements ValidatorConstraintInterface
{
    validate(
        value: string,
        validationArguments?: ValidationArguments,
    ): boolean | Promise<boolean> {
        return validateCard(value);
    }

    defaultMessage(
        validationArguments?: ValidationArguments,
    ): string {
        return `Entered card number - $value - is not a valid Iranian card number`;
    }
}

/**
 * README: This function comes from https://gist.github.com/mahmoud-eskandari/1041cc435f5837b540e69f5312165eb1
 */
function validateCard(card: string): boolean {
    if (
        typeof card === 'undefined' ||
        isNil(card) ||
        card.length !== 16
    ) {
        return false;
    }

    let cardTotal = 0;

    for (let i = 0; i < 16; i += 1) {
        const c = Number(card[i]);
        if (i % 2 === 0) {
            cardTotal += c * 2 > 9 ? c * 2 - 9 : c * 2;
        } else {
            cardTotal += c;
        }
    }

    return cardTotal % 10 === 0;
}

bank-info.dto.ts:

import { ApiProperty } from '@nestjs/swagger';
import { IsOptional, IsString, Length } from 'class-validator';

import { IsValidCardNumber } from '../decorators/is-valid-card-number.decorator';

export class BankInfoDto {
    @ApiProperty({
        required: false,
        description: `bank account card number`,
        example: '1234123412341234',
        nullable: false,
    })
    @IsOptional()
    @Length(16, 16, { message: 'شماره کارت های بانکی ۱۶ رقم است' })
    @IsString()
    @IsValidCardNumber({
        message: 'شماره کارت وارد شده یک شماره کارت مجاز نیست',
    })
    cardNumber?: string;