Oli Sturm
45 lines
1.7 KiB
JavaScript
45 lines
1.7 KiB
JavaScript
import { randomUUID } from 'crypto';
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import { catchResult, bind, tap, tapError, mapError, pipe } from './library/result.js';
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import { output, outputError } from './library/logging.js';
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import { createInMemoryRepository, innerAccountError } from './infrastructure/repository.js';
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import { openAccount } from './domain/account.js';
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import { createMoney } from './domain/money.js';
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import { createWithdrawMoney } from './application/accountApp.js';
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const log = (src, msg) => (result) =>
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tap((x) => output(src, msg)(x))(tapError((e) => outputError(src, e))(result));
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const logWith = (src, renderText) => (result) =>
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tap((x) => output(src, renderText(x))(x))(tapError((e) => outputError(src, e))(result));
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console.log('[js-fp3] Starting withdraw money demo...');
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const accountId = randomUUID();
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// Try changing this to 250 to see an error being handled
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const withdrawalAmount = 100;
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pipe(
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catchResult(
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createInMemoryRepository,
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(ex) => ({ type: 'RepositoryCreationFailed', message: ex.message })
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),
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bind((repo) =>
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pipe(
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createWithdrawMoney(repo),
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bind((withdrawMoney) =>
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pipe(
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openAccount(accountId, createMoney(200)),
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logWith('js-fp3 seed', (account) => `Seeding account ${account.id} with opening balance ${account.balance.amount.toFixed(2)}`),
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bind(repo.saveAccount),
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log('js-fp3 exec', `Executing withdrawal ${withdrawalAmount.toFixed(2)} from account ${accountId}`),
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bind(() => withdrawMoney(accountId, withdrawalAmount)),
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logWith('js-fp3 new balance', (account) => `New balance is ${account.balance.amount.toFixed(2)}`),
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mapError((ae) => innerAccountError(ae))
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)
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)
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)
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),
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log('js-fp3 done', 'Demo completed.')
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);
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