feat: add scene 8 entry state

2026-07-12 05:02:34 +07:00
parent 70e1241985
commit 640873a8a2
2 changed files with 79 additions and 0 deletions
@@ -0,0 +1,45 @@
+import { describe, expect, it } from "vitest";
+import {
+  SCENE8_REQUEST,
+  canSubmitScene8Entry,
+  initialScene8EntryState,
+  scene8EntryReducer,
+} from "./scene8-entry-state.js";
+
+describe("scene8EntryReducer", () => {
+  it("starts with the canonical request as the editable draft", () => {
+    expect(initialScene8EntryState).toEqual({ phase: "empty", draft: SCENE8_REQUEST });
+    expect(canSubmitScene8Entry(initialScene8EntryState)).toBe(true);
+  });
+
+  it("updates only the draft while the entry is empty", () => {
+    expect(scene8EntryReducer(initialScene8EntryState, {
+      type: "draft_changed",
+      draft: "A narrower request",
+    })).toEqual({ phase: "empty", draft: "A narrower request" });
+  });
+
+  it("rejects whitespace-only submissions", () => {
+    const state = { phase: "empty" as const, draft: "  \n\t" };
+    expect(canSubmitScene8Entry(state)).toBe(false);
+    expect(scene8EntryReducer(state, { type: "submit" })).toBe(state);
+  });
+
+  it("stores the exact submitted text", () => {
+    const state = { phase: "empty" as const, draft: "  Keep this spacing  " };
+    expect(scene8EntryReducer(state, { type: "submit" })).toEqual({
+      phase: "submitted",
+      draft: state.draft,
+      request: state.draft,
+    });
+  });
+
+  it("keeps a submitted request stable on edits or repeated submits", () => {
+    const submitted = scene8EntryReducer(initialScene8EntryState, { type: "submit" });
+    expect(scene8EntryReducer(submitted, {
+      type: "draft_changed",
+      draft: "A different request",
+    })).toBe(submitted);
+    expect(scene8EntryReducer(submitted, { type: "submit" })).toBe(submitted);
+  });
+});
@@ -0,0 +1,34 @@
+export const SCENE8_REQUEST =
+  "We need to author a report workflow for the lda_report scenario. What sources and capabilities are available?";
+
+export type Scene8EntryState =
+  | { readonly phase: "empty"; readonly draft: string }
+  | { readonly phase: "submitted"; readonly draft: string; readonly request: string };
+
+export type Scene8EntryAction =
+  | { readonly type: "draft_changed"; readonly draft: string }
+  | { readonly type: "submit" };
+
+export const initialScene8EntryState: Scene8EntryState = {
+  phase: "empty",
+  draft: SCENE8_REQUEST,
+};
+
+export const canSubmitScene8Entry = (state: Scene8EntryState): boolean =>
+  state.phase === "empty" && state.draft.trim().length > 0;
+
+export const scene8EntryReducer = (
+  state: Scene8EntryState,
+  action: Scene8EntryAction,
+): Scene8EntryState => {
+  if (state.phase === "submitted") return state;
+
+  switch (action.type) {
+    case "draft_changed":
+      return { phase: "empty", draft: action.draft };
+    case "submit":
+      return canSubmitScene8Entry(state)
+        ? { phase: "submitted", draft: state.draft, request: state.draft }
+        : state;
+  }
+};