51 lines
1.4 KiB
TypeScript
51 lines
1.4 KiB
TypeScript
import { ArgumentOutOfRangeException } from '@libs/exceptions';
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import { AggregateRoot } from '@libs/ddd/domain/base-classes/aggregate-root.base';
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import { UUID } from '@libs/ddd/domain/value-objects/uuid.value-object';
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import { Err, Ok, Result } from 'oxide.ts/dist';
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import { WalletNotEnoughBalanceError } from '../../errors/wallet.errors';
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export interface CreateWalletProps {
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userId: UUID;
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}
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export interface WalletProps extends CreateWalletProps {
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balance: number;
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}
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export class WalletEntity extends AggregateRoot<WalletProps> {
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protected readonly _id: UUID;
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static create(create: CreateWalletProps): WalletEntity {
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const id = UUID.generate();
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const props: WalletProps = { ...create, balance: 0 };
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const wallet = new WalletEntity({ id, props });
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return wallet;
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}
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deposit(amount: number): void {
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this.props.balance += amount;
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}
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withdraw(amount: number): Result<null, WalletNotEnoughBalanceError> {
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if (this.props.balance - amount < 0) {
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return Err(new WalletNotEnoughBalanceError());
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}
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this.props.balance -= amount;
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return Ok(null);
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}
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/**
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* Protects wallet invariant.
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* This method is executed by a repository
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* before saving entity in a database.
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*/
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public validate(): void {
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if (this.props.balance < 0) {
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throw new ArgumentOutOfRangeException(
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'Wallet balance cannot be less than 0',
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);
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}
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}
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}
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