55 lines
2.0 KiB
C#
55 lines
2.0 KiB
C#
using FinancialApi.Application.Commands;
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using FinancialApi.Application.Events;
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using FinancialApi.Application.Interfaces;
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using FinancialApi.Application.Models;
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using FinancialApi.Domain;
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using FinancialApi.Domain.Aggregates;
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using FinancialApi.Domain.Entities;
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using Wolverine.Persistence;
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namespace FinancialApi.Application.Handlers;
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public static class ApplyFeeHandler
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{
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public static async Task<FeeContext> LoadAsync(ApplyFeeCommand cmd, IAccountQuery query, TimeProvider timeProvider)
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{
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var source = await query.FindByIdAsync(cmd.AccountId);
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var dest = await query.FindByIdAsync(99999);
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if (source == null || dest == null)
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{
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throw new InvalidOperationException($"Cannot process transfer. Account(s) not found.");
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}
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return new FeeContext(source, dest, timeProvider.GetUtcNow());
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}
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public static ( IStorageAction<Account> CustomerWrite, IStorageAction<Account> RevenueWrite,
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IStorageAction<JournalEntry> JournalWrite, FeeAppliedEvent Event ) Handle(
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ApplyFeeCommand cmd,
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FeeContext context
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)
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{
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var updatedSource = context.Source.ApplyPosting(cmd.Amount, EntryType.Debit);
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var updatedRevenue = context.Destination.ApplyPosting(cmd.Amount, EntryType.Credit);
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var serviceFee = 0.5m;
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var lines = new List<JournalLine>
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{
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new(updatedSource.Id, cmd.Amount, EntryType.Debit),
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new(updatedRevenue.Id, cmd.Amount - serviceFee, EntryType.Credit),
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new(updatedRevenue.Id, serviceFee, EntryType.Credit)
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};
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var journalEntry = BalancedJournal.Create(
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Guid.NewGuid(),
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$"Service Fee Applied: {cmd.Amount} to Account {cmd.AccountId}",
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context.TimeStamp,
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lines
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);
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var @event = new FeeAppliedEvent(cmd.AccountId, cmd.Amount);
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return (Storage.Update(updatedSource), Storage.Update(updatedRevenue), Storage.Insert(journalEntry.Entry),
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@event);
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}
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} |