Creating a Journal Reversal handler.

wolverine/a-frame-architecture/FinancialApi.Infrastructure/ReversalQuery.cs

@@ -0,0 +1,33 @@
+using FinancialApi.Application;
+using Microsoft.EntityFrameworkCore;
+
+namespace FinancialApi.Infrastructure;
+
+public class ReversalQuery : IReversalQuery
+{
+    private readonly AccountDbContext _db;
+
+    public ReversalQuery(AccountDbContext db) => _db = db;
+
+    public async Task<ReversalData?> GetReversalDataAsync(Guid journalEntryId)
+    {
+        var entry = await _db.JournalEntries
+            .Include(x => x.Lines)
+            .AsNoTracking()
+            .FirstOrDefaultAsync(x => x.Id == journalEntryId);
+
+        if (entry == null)
+        {
+            return null;
+        }
+
+        var accountIds = entry.Lines.Select(l => l.AccountId).Distinct().ToList();
+
+        var accounts = await _db.Accounts
+            .AsNoTracking()
+            .Where(a => accountIds.Contains(a.Id))
+            .ToListAsync();
+
+        return new ReversalData(entry, accounts);
+    }
+}