refactor: streamline outbound payload handling

src/infra/outbound/payloads.test.ts

@@ -0,0 +1,50 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  formatOutboundPayloadLog,
+  normalizeOutboundPayloadsForJson,
+} from "./payloads.js";
+
+describe("normalizeOutboundPayloadsForJson", () => {
+  it("normalizes payloads with mediaUrl and mediaUrls", () => {
+    expect(
+      normalizeOutboundPayloadsForJson([
+        { text: "hi" },
+        { text: "photo", mediaUrl: "https://x.test/a.jpg" },
+        { text: "multi", mediaUrls: ["https://x.test/1.png"] },
+      ]),
+    ).toEqual([
+      { text: "hi", mediaUrl: null, mediaUrls: undefined },
+      {
+        text: "photo",
+        mediaUrl: "https://x.test/a.jpg",
+        mediaUrls: ["https://x.test/a.jpg"],
+      },
+      {
+        text: "multi",
+        mediaUrl: null,
+        mediaUrls: ["https://x.test/1.png"],
+      },
+    ]);
+  });
+});
+
+describe("formatOutboundPayloadLog", () => {
+  it("trims trailing text and appends media lines", () => {
+    expect(
+      formatOutboundPayloadLog({
+        text: "hello  ",
+        mediaUrls: ["https://x.test/a.png", "https://x.test/b.png"],
+      }),
+    ).toBe("hello\nMEDIA:https://x.test/a.png\nMEDIA:https://x.test/b.png");
+  });
+
+  it("logs media-only payloads", () => {
+    expect(
+      formatOutboundPayloadLog({
+        text: "",
+        mediaUrls: ["https://x.test/a.png"],
+      }),
+    ).toBe("MEDIA:https://x.test/a.png");
+  });
+});