Adding journal entries and database tables. Increased starting balances.

2026-07-15 12:08:28 +02:00
parent 0de38ef2df
commit 656f545281
13 changed files with 498 additions and 34 deletions
@@ -5,25 +5,53 @@ using Wolverine.Persistence;

 namespace FinancialApi.Infrastructure;

-public static class ApplyFeeHandler
-{
-    public static Task<Account?> LoadAsync(
-        ApplyFeeCommand cmd,
-        AccountDbContext db) => db.Accounts.AsNoTracking().SingleOrDefaultAsync(x => x.Id == cmd.AccountId);
-
-    [Transactional]
-    public static (IStorageAction<Account> UpdatedAccount, FeeAppliedEvent Event) Handle(
-        ApplyFeeCommand cmd,
-        Account account)
-    {
-        var updatedAccount = account.ApplyFee(cmd.Amount);
-
-        var @event = new FeeAppliedEvent(account.Id, cmd.Amount);
-
-        return (Storage.Update(updatedAccount), @event);
-    }
-}
-
 public record ApplyFeeCommand(int AccountId, decimal Amount);

-public record FeeAppliedEvent(int AccountId, decimal Amount);
+public record FeePair(Account CustomerAccount, Account RevenueAccount);
+
+public record FeeAppliedEvent(int AccountId, decimal Amount);
+
+public static class ApplyFeeHandler
+{
+    public static async Task<FeePair?> LoadAsync(
+        ApplyFeeCommand cmd,
+        AccountDbContext db)
+    {
+        var customer = await db.Accounts.AsNoTracking().SingleOrDefaultAsync(x => x.Id == cmd.AccountId);
+        var revenue = await db.Accounts.AsNoTracking().SingleOrDefaultAsync(x => x.Id == 99999);
+        return (customer == null || revenue == null) ? null : new FeePair(customer, revenue);
+    }
+
+    [Transactional]
+    public static (
+        IStorageAction<Account> CustomerWrite,
+        IStorageAction<Account> RevenueWrite,
+        IStorageAction<JournalEntry> JournalWrite,
+        FeeAppliedEvent Event
+        )
+        Handle(
+            ApplyFeeCommand cmd,
+            FeePair pair
+        )
+    {
+        var updatedCustomer = pair.CustomerAccount.ApplyPosting(cmd.Amount, EntryType.Debit);
+        var updatedRevenue = pair.RevenueAccount.ApplyPosting(cmd.Amount, EntryType.Credit);
+        var lines = new List<JournalLine>
+        {
+            new(pair.CustomerAccount.Id, cmd.Amount, EntryType.Debit),
+            new(9999, cmd.Amount, EntryType.Credit)
+        };
+        var journalEntry = BalancedJournal.Create(Guid.NewGuid(),
+            $"Service Fee Applied: {cmd.Amount} to Account {cmd.AccountId}",
+            DateTimeOffset.UtcNow, lines);
+
+        var @event = new FeeAppliedEvent(cmd.AccountId, cmd.Amount);
+
+        return (
+            Storage.Update(updatedCustomer),
+            Storage.Update(updatedRevenue),
+            Storage.Insert(journalEntry.Entry),
+            @event
+        );
+    }
+}