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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace App\Domain\Transaction\Service; |
| 6 | |
| 7 | use App\Domain\Exception\NotFoundException; |
| 8 | use App\Domain\Transaction\Data\TransactionData; |
| 9 | use App\Domain\Transaction\Repository\TransactionRepository; |
| 10 | use DomainException; |
| 11 | use InvalidArgumentException; |
| 12 | |
| 13 | use function in_array; |
| 14 | |
| 15 | /** |
| 16 | * Service for creating and managing transactions. |
| 17 | */ |
| 18 | final readonly class TransactionService |
| 19 | { |
| 20 | private const VALID_TYPES = [ |
| 21 | 'deposit', |
| 22 | 'withdrawal', |
| 23 | 'transfer_in', |
| 24 | 'transfer_out', |
| 25 | 'interest', |
| 26 | 'fee', |
| 27 | 'loan_disbursement', |
| 28 | 'loan_payment', |
| 29 | ]; |
| 30 | |
| 31 | public function __construct( |
| 32 | private TransactionRepository $repository, |
| 33 | ) {} |
| 34 | |
| 35 | /** |
| 36 | * Create a new transaction. |
| 37 | * |
| 38 | * @param int $accountId The account ID |
| 39 | * @param string $transactionType The type of transaction |
| 40 | * @param string $amount The transaction amount (positive value) |
| 41 | * @param string|null $description Optional description |
| 42 | * |
| 43 | * @throws DomainException If account does not exist or is not active |
| 44 | * @throws InvalidArgumentException If parameters are invalid |
| 45 | * |
| 46 | * @return TransactionData The created transaction |
| 47 | */ |
| 48 | public function createTransaction( |
| 49 | int $accountId, |
| 50 | string $transactionType, |
| 51 | string $amount, |
| 52 | ?string $description = null, |
| 53 | ): TransactionData { |
| 54 | // Validate transaction type |
| 55 | if (!in_array($transactionType, self::VALID_TYPES, true)) { |
| 56 | throw new InvalidArgumentException( |
| 57 | 'Invalid transaction type. Must be one of: ' . implode(', ', self::VALID_TYPES), |
| 58 | ); |
| 59 | } |
| 60 | |
| 61 | // Validate amount is positive |
| 62 | $amountFloat = (float)$amount; |
| 63 | if ($amountFloat <= 0) { |
| 64 | throw new InvalidArgumentException('Amount must be greater than zero'); |
| 65 | } |
| 66 | |
| 67 | // Validate account exists |
| 68 | if (!$this->repository->accountExists($accountId)) { |
| 69 | throw new NotFoundException("Account with ID {$accountId} not found"); |
| 70 | } |
| 71 | |
| 72 | // Check account status (must be active or pending for deposits) |
| 73 | $accountStatus = $this->repository->getAccountStatus($accountId); |
| 74 | |
| 75 | if ($accountStatus === 'closed') { |
| 76 | throw new DomainException('Cannot create transaction on a closed account'); |
| 77 | } |
| 78 | |
| 79 | if ($accountStatus === 'frozen' && $transactionType !== 'interest') { |
| 80 | throw new DomainException('Cannot create transaction on a frozen account'); |
| 81 | } |
| 82 | |
| 83 | // For withdrawals, check sufficient balance |
| 84 | if (in_array($transactionType, ['withdrawal', 'transfer_out', 'fee', 'loan_payment'], true)) { |
| 85 | $availableBalance = $this->repository->getAccountAvailableBalance($accountId); |
| 86 | if ($amountFloat > (float)$availableBalance) { |
| 87 | throw new DomainException('Insufficient available balance for this transaction'); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | // Create the transaction |
| 92 | return $this->repository->create( |
| 93 | accountId: $accountId, |
| 94 | transactionType: $transactionType, |
| 95 | amount: $amount, |
| 96 | description: $description, |
| 97 | ); |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Get valid transaction types. |
| 102 | * |
| 103 | * @return array<string> |
| 104 | */ |
| 105 | public function getValidTypes(): array |
| 106 | { |
| 107 | return self::VALID_TYPES; |
| 108 | } |
| 109 | } |