add fp3 sample

2026-04-23 18:46:08 +01:00
parent af65d696a6
commit 89faa924bc
9 changed files with 335 additions and 0 deletions
@@ -0,0 +1,44 @@
+using CsharpFp3.Domain;
+using CsharpFp3.Library;
+using static CsharpFp3.Library.Logging;
+
+namespace CsharpFp3.Infrastructure;
+
+public sealed record Repository(
+    Func<Guid, Result<Account, AccountError>> LoadAccount,
+    Func<Account, Result<Account, AccountError>> SaveAccount
+);
+
+public static class InMemoryAccountRepository
+{
+    public static Repository Create()
+    {
+        Dictionary<Guid, Account> store = new();
+
+        Result<Account, AccountError> GetById(Guid id) =>
+            store.TryGetValue(id, out var account)
+                ? LogReturn(
+                    $"[Repo] Loaded account {id}",
+                    Result<Account, AccountError>.Ok(account)
+                )
+                : LogReturn(
+                    $"[Repo] Account {id} not found",
+                    Result<Account, AccountError>.Fail(new AccountError.AccountNotFound(id))
+                );
+
+        Result<Account, AccountError> Save(Account account)
+        {
+            store[account.Id] = account;
+
+            // no failure modes here
+            return LogReturn(
+                $"[Repo] Saved account {account.Id} with balance {account.Balance.Amount:0.00}",
+                Result<Account, AccountError>.Ok(account)
+            );
+        }
+
+        // What if something goes wrong?
+        // throw new Exception("Something went wrong");
+        return new Repository(GetById, Save);
+    }
+}