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<?php
namespace Bavix\Wallet\Services;
use function app;
use Bavix\Wallet\Exceptions\AmountInvalid;
use Bavix\Wallet\Interfaces\Customer;
use Bavix\Wallet\Interfaces\Discount;
use Bavix\Wallet\Interfaces\Mathable;
use Bavix\Wallet\Interfaces\MinimalTaxable;
use Bavix\Wallet\Interfaces\Storable;
use Bavix\Wallet\Interfaces\Taxable;
use Bavix\Wallet\Interfaces\Wallet;
use Bavix\Wallet\Models\Wallet as WalletModel;
use Bavix\Wallet\Traits\HasWallet;
use Throwable;
class WalletService
{
/**
* @param Wallet $customer
* @param Wallet $product
*
* @return int
*/
public function discount(Wallet $customer, Wallet $product): int
{
if ($customer instanceof Customer && $product instanceof Discount) {
return (int) $product->getPersonalDiscount($customer);
}
// without discount
return 0;
}
/**
* @param Wallet $object
*
* @return int
*/
public function decimalPlacesValue(Wallet $object): int
{
return $this->getWallet($object)->decimal_places ?: 2;
}
/**
* @param Wallet $object
*
* @return string
*/
public function decimalPlaces(Wallet $object): string
{
return app(Mathable::class)
->pow(10, $this->decimalPlacesValue($object));
}
/**
* Consider the fee that the system will receive.
*
* @param Wallet $wallet
* @param int|string $amount
*
* @return float|int
*/
public function fee(Wallet $wallet, $amount)
{
$fee = 0;
$math = app(Mathable::class);
if ($wallet instanceof Taxable) {
$placesValue = $this->decimalPlacesValue($wallet);
$fee = $math->floor(
$math->div(
$math->mul($amount, $wallet->getFeePercent(), 0),
100,
$placesValue
)
);
}
/**
* Added minimum commission condition.
*
* @see https://github.com/bavix/laravel-wallet/issues/64#issuecomment-514483143
*/
if ($wallet instanceof MinimalTaxable) {
$minimal = $wallet->getMinimalFee();
if (app(Mathable::class)->compare($fee, $minimal) === -1) {
$fee = $minimal;
}
}
return $fee;
}
/**
* The amount of checks for errors.
*
* @param int|string $amount
*
* @throws AmountInvalid
*/
public function checkAmount($amount): void
{
if (app(Mathable::class)->compare($amount, 0) === -1) {
throw new AmountInvalid(trans('wallet::errors.price_positive'));
}
}
/**
* @param Wallet $object
* @param bool $autoSave
*
* @return WalletModel
*/
public function getWallet(Wallet $object, bool $autoSave = true): WalletModel
{
/**
* @var WalletModel $wallet
*/
$wallet = $object;
if (! ($object instanceof WalletModel)) {
/**
* @var HasWallet $object
*/
$wallet = $object->wallet;
}
if ($autoSave) {
$wallet->exists or $wallet->save();
}
return $wallet;
}
/**
* @param WalletModel $wallet
*
* @return bool
*/
public function refresh(WalletModel $wallet): bool
{
return app(LockService::class)->lock($this, __FUNCTION__, static function () use ($wallet) {
$math = app(Mathable::class);
app(Storable::class)->getBalance($wallet);
$whatIs = $wallet->balance;
$balance = $wallet->getAvailableBalance();
$wallet->balance = $balance;
return app(Storable::class)->setBalance($wallet, $balance) &&
(! $math->compare($whatIs, $balance) || $wallet->save());
});
}
/**
* @param WalletModel $wallet
* @param array|null $meta
*
* @return void
*
* @throws Throwable
*/
public function adjustment(WalletModel $wallet, ?array $meta = null): void
{
app(DbService::class)->transaction(function () use ($wallet, $meta) {
$math = app(Mathable::class);
app(Storable::class)->getBalance($wallet);
$adjustmentBalance = $wallet->balance;
$wallet->refreshBalance();
$difference = $math->sub($wallet->balance, $adjustmentBalance);
switch ($math->compare($difference, 0)) {
case -1:
$wallet->deposit($math->abs($difference), $meta);
break;
case 1:
$wallet->forceWithdraw($math->abs($difference), $meta);
break;
}
});
}
}