From 1d66a0f58e4ebcdf4f42c9d78f82a1ab49a2cf11 Mon Sep 17 00:00:00 2001
From: Elizabeth Hunt <lizhunt@amazon.com>
Date: Tue, 13 May 2025 18:58:45 -0700
Subject: snapshot!

---
 u/trace/trace.ts | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 u/trace/trace.ts

(limited to 'u/trace/trace.ts')

diff --git a/u/trace/trace.ts b/u/trace/trace.ts
new file mode 100644
index 0000000..5d5c59b
--- /dev/null
+++ b/u/trace/trace.ts
@@ -0,0 +1,34 @@
+import type { Callable } from "@emprespresso/utils";
+import {
+  type ITraceableMapper,
+  type ITraceableTuple,
+  TraceableImpl,
+  TraceableLogger,
+} from "./mod.ts";
+
+export class Traceable<T> extends TraceableImpl<T, TraceableLogger> {
+  static from<T>(t: T) {
+    return new Traceable(t, new TraceableLogger());
+  }
+
+  static withFunctionTrace<F extends Callable, T>(
+    f: F,
+  ): ITraceableMapper<T, TraceableLogger, ITraceableTuple<T>> {
+    return (t) => [t.item, f.name];
+  }
+
+  static withClassTrace<C extends object, T>(
+    c: C,
+  ): ITraceableMapper<T, TraceableLogger, ITraceableTuple<T>> {
+    return (t) => [t.item, c.constructor.name];
+  }
+
+  static promiseify<T, U>(
+    mapper: ITraceableMapper<T, TraceableLogger, U>,
+  ): ITraceableMapper<Promise<T>, TraceableLogger, Promise<U>> {
+    return (traceablePromise) =>
+      traceablePromise.flatMapAsync(async (t) =>
+        t.move(await t.item).map(mapper)
+      ).item;
+  }
+}
-- 
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