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 +1,41 @@
+using CsharpFp3.Application;
+using CsharpFp3.Domain;
+using CsharpFp3.Infrastructure;
+using CsharpFp3.Library;
+
+Console.WriteLine("[csharp-fp3] Starting withdraw money demo...");
+
+var accountId = Guid.NewGuid();
+
+// try changing this to 250m to see an error being handled
+var withdrawalAmount = 100m;
+
+Result<Repository, AppError>
+    .Catch(
+        InMemoryAccountRepository.Create,
+        ex => new AppError.RepositoryCreationFailed(ex.Message)
+    )
+    .Bind(repo =>
+        AccountApplication
+            .CreateWithdrawMoney(repo)
+            .Bind(withdrawMoney =>
+                AccountDomain
+                    .Open(accountId, new Money(200m))
+                    .Log(
+                        "csharp-fp3 seed",
+                        account =>
+                            $"Seeding account {account.Id} with opening balance {account.Balance}"
+                    )
+                    .Bind(repo.SaveAccount)
+                    .Log(
+                        "csharp-fp3 exec",
+                        $"Executing withdrawal {withdrawalAmount:0.00} from account {accountId}"
+                    )
+                    .Bind<Account, Account, AccountError>(account =>
+                        withdrawMoney(account.Id, withdrawalAmount)
+                    )
+                    .Log("csharp-fp3 new balance", account => $"New balance is {account.Balance}")
+                    .MapError(ae => (AppError)new AppError.InnerAccountError(ae))
+            )
+    )
+    .Log("csharp-fp3 done", "Demo completed.");