feat(discord): Discord transport

src/discord/send.test.ts

@@ -0,0 +1,85 @@
+import { Routes } from "discord.js";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+import { sendMessageDiscord } from "./send.js";
+
+vi.mock("../web/media.js", () => ({
+  loadWebMedia: vi.fn().mockResolvedValue({
+    buffer: Buffer.from("img"),
+    fileName: "photo.jpg",
+    contentType: "image/jpeg",
+    kind: "image",
+  }),
+}));
+
+const makeRest = () => {
+  const postMock = vi.fn();
+  return {
+    rest: {
+      post: postMock,
+    } as unknown as import("discord.js").REST,
+    postMock,
+  };
+};
+
+describe("sendMessageDiscord", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it("sends basic channel messages", async () => {
+    const { rest, postMock } = makeRest();
+    postMock.mockResolvedValue({
+      id: "msg1",
+      channel_id: "789",
+    });
+    const res = await sendMessageDiscord("channel:789", "hello world", {
+      rest,
+      token: "t",
+    });
+    expect(res).toEqual({ messageId: "msg1", channelId: "789" });
+    expect(postMock).toHaveBeenCalledWith(
+      Routes.channelMessages("789"),
+      expect.objectContaining({ body: { content: "hello world" } }),
+    );
+  });
+
+  it("starts DM when recipient is a user", async () => {
+    const { rest, postMock } = makeRest();
+    postMock
+      .mockResolvedValueOnce({ id: "chan1" })
+      .mockResolvedValueOnce({ id: "msg1", channel_id: "chan1" });
+    const res = await sendMessageDiscord("user:123", "hiya", {
+      rest,
+      token: "t",
+    });
+    expect(postMock).toHaveBeenNthCalledWith(
+      1,
+      Routes.userChannels(),
+      expect.objectContaining({ body: { recipient_id: "123" } }),
+    );
+    expect(postMock).toHaveBeenNthCalledWith(
+      2,
+      Routes.channelMessages("chan1"),
+      expect.objectContaining({ body: { content: "hiya" } }),
+    );
+    expect(res.channelId).toBe("chan1");
+  });
+
+  it("uploads media attachments", async () => {
+    const { rest, postMock } = makeRest();
+    postMock.mockResolvedValue({ id: "msg", channel_id: "789" });
+    const res = await sendMessageDiscord("channel:789", "photo", {
+      rest,
+      token: "t",
+      mediaUrl: "file:///tmp/photo.jpg",
+    });
+    expect(res.messageId).toBe("msg");
+    expect(postMock).toHaveBeenCalledWith(
+      Routes.channelMessages("789"),
+      expect.objectContaining({
+        files: [expect.objectContaining({ name: "photo.jpg" })],
+      }),
+    );
+  });
+});