TungNT (Blue)

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====== Strategy ======

Strategy là một mẫu thiết kế hành vi cho phép xác định một họ thuật toán, đưa từng thuật toán vào một lớp riêng biệt thay vì phải dùng nhiều điều kiện if trong một function - khó tiếp cận và bảo trì.

**Ví dụ khi chưa dùng Strategy, đoạn code quá nhiều if dẫn đến khó kiểm soát:**

<file php>
    private static function getProviderTransfer($userInfo, $bankInfo = null, $accountNo = null, $options = [])
    {
        if(!empty($accountNo) && preg_match('/^(M999)/', $accountNo, $matches) && $bankInfo->code == Bank::BANK_CODE_TECHCOMBANK){
            return UserTransaction::PROVIDER_TRANSFER_TECHCOMBANK;
        }
        if (!empty($accountNo) && preg_match('/^(966699)/', $accountNo, $matches) && $bankInfo->code == Bank::BANK_CODE_MSB) {
            return UserTransaction::PROVIDER_TRANSFER_VPBANK;
        }
        if (!empty($options['amount']) && is_numeric($options['amount']) && $options['amount'] < 2000) {
            if ($bankInfo->code == Bank::BANK_CODE_TECHCOMBANK  && !Bank::isAccountNoTCB($accountNo)) {
                return UserTransaction::PROVIDER_TRANSFER_VIETINBANK;
            }

if (in_array($bankInfo->code, [
                UserTransaction::PROVIDER_TRANSFER_TPBANK, UserTransaction::PROVIDER_TRANSFER_TECHCOMBANK,
                UserTransaction::PROVIDER_TRANSFER_VIETINBANK, UserTransaction::PROVIDER_TRANSFER_MBBANK,
                UserTransaction::PROVIDER_TRANSFER_VPBANK])) {
                  return $bankInfo->code;
            }
            return UserTransaction::PROVIDER_TRANSFER_VIETINBANK;
        }

$payoutMsbCardTypeCacheKey ='PAYOUT_MSB_CARD_TYPE';
        if ($bankInfo->code == 'MSB' && !empty($accountNo) && Bank::checkTypeCard($accountNo) && Cache::has($payoutMsbCardTypeCacheKey)) {
            $payoutMsbCardType = Cache::get($payoutMsbCardTypeCacheKey);
            if($payoutMsbCardType == 'VIETINBANK'){
                return UserTransaction::PROVIDER_TRANSFER_VIETINBANK;
            }
        }

$appSetting = AppSetting::get()->pluck('content','key')->toArray();
        $providerDefault = data_get($appSetting, 'PAYOUT_PROVIDER_DEFAULT', UserTransaction::PROVIDER_TRANSFER_VPBANK);
        $providerMerchantXDefault = data_get($appSetting, 'PAYOUT_PROVIDER_MERCHANT_IS_X', '');
        if (!empty($userInfo->payout_provider_code)) {
            $accountName = !empty($options['account_name']) ? $options['account_name'] : '';

if ($userInfo->payout_provider_code == UserTransaction::PROVIDER_TRANSFER_TECHCOMBANK && !Bank::isValidAccountNameByFirstName($accountName)) {
                return $providerDefault;
            }
            if ($userInfo->payout_provider_code == UserTransaction::PROVIDER_TRANSFER_TECHCOMBANK && $bankInfo->code == Bank::BANK_CODE_TECHCOMBANK  && !Bank::isAccountNoTCB($accountNo)) {
                return $providerDefault;
            }
            if ($userInfo->payout_provider_code == UserTransaction::PROVIDER_TRANSFER_TECHCOMBANK && !empty($accountNo) && (Bank::checkTypeCard($accountNo) || Bank::hasSpecialCharacter($accountNo) || Phone::isValid($accountNo))){
                return $providerDefault;
            }

if ($userInfo->payout_provider_code == UserTransaction::PROVIDER_TRANSFER_TPBANK && !empty($accountNo) && (Bank::checkTypeCard($accountNo) || Bank::hasSpecialCharacter($accountNo) || !is_numeric($accountNo) || Phone::isValid($accountNo))) {
                return $providerDefault;
            }

$payoutProviderSetting = !empty($userInfo->payout_provider_settings) ? explode(',', $userInfo->payout_provider_settings) : [];
            if ($payoutProviderSetting && is_array($payoutProviderSetting) && in_array($bankInfo->code, $payoutProviderSetting)) {
                return $bankInfo->code;
            }

return strtoupper($userInfo->payout_provider_code);
        }

if($userInfo->is_merchant_x==1 && !empty($providerMerchantXDefault)){
            return $providerMerchantXDefault;
        }

if($userInfo->name=='dlocal' && !empty($options['amount']) && is_numeric($options['amount']) && is_numeric($accountNo) && !Phone::isValid($accountNo) && !Bank::checkTypeCard($accountNo) && $options['amount']< 10000){
            return UserTransaction::PROVIDER_TRANSFER_TECHCOMBANK;
        }

if (!empty($options['amount']) && $options['amount'] >= config('setting.min_citad_amount') && in_array($userInfo->name, config('setting.merchant_citad'))) {
            return UserTransaction::PROVIDER_TRANSFER_TECHCOMBANK;
        }

if(!is_numeric($accountNo) && !in_array($bankInfo->code, config('bank.bank_is_support_inick'))){
            return $providerDefault;
        }
        if (!empty($accountNo) && Bank::checkTypeCard($accountNo) && !in_array($bankInfo->code, config('bank.bank_is_support_card'))){
            $bankTransferAtm=data_get($appSetting, 'PAYOUT_PROVIDER_ATM', $providerDefault);
            if($bankTransferAtm==UserTransaction::PROVIDER_TRANSFER_BIDV && $bankInfo->code==Bank::BANK_CODE_MSB)
            {
                return $providerDefault;
            }
            return $bankTransferAtm;
        }
        if (!empty($accountNo) && Phone::isValid($accountNo) && !in_array($bankInfo->code, config('bank.bank_is_support_phone_number'))){
            return $providerDefault;
        }
        if (!empty($accountNo) && Bank::hasSpecialCharacter($accountNo)) {
            return $providerDefault;
        }

$transferBankSetting = TransferBankPartner::query()
            ->where('bank_code', $bankInfo->code)
            ->first();
        if (!$transferBankSetting instanceof TransferBankPartner) {
            return $providerDefault;
        }
        
        if(in_array($transferBankSetting->provider,[UserTransaction::PROVIDER_TRANSFER_TPBANK,UserTransaction::PROVIDER_TRANSFER_BIDV]) && in_array(Carbon::now()->hour,[23,0])){
            return $providerDefault;
        }
        if ($transferBankSetting->provider == UserTransaction::PROVIDER_TRANSFER_TECHCOMBANK
            && $bankInfo->code == Bank::BANK_CODE_TECHCOMBANK
            && !Bank::isAccountNoTCB($accountNo)) {
            return $providerDefault;
        }

if ($transferBankSetting->provider == UserTransaction::PROVIDER_TRANSFER_TECHCOMBANK && !empty($accountNo) && (Bank::checkTypeCard($accountNo) || !is_numeric($accountNo) || Phone::isValid($accountNo))) {
            return $providerDefault;
        }

if ($transferBankSetting->provider == UserTransaction::PROVIDER_TRANSFER_TPBANK && !empty($accountNo) && (Bank::checkTypeCard($accountNo) || !is_numeric($accountNo) || Phone::isValid($accountNo))) {
            return $providerDefault;
        }

if ($transferBankSetting->provider == UserTransaction::PROVIDER_TRANSFER_MBBANK && !empty($options['amount']) && $options['amount'] > 4000000000) {
            return $providerDefault;
        }

return $transferBankSetting->provider;
    }
</file>

**Ví dụ về Strategy Pattern:**

<file php PaymentMethodInterface.php>
<?php