refactor(ecommerce): extract platform rules and prompt builders

src/features/ecommerce/utils/platformRules.test.ts

@@ -0,0 +1,95 @@
+import { describe, expect, it } from "vitest";
+import {
+  defaultCloneOutput,
+  defaultEcommercePlatform,
+  defaultProductSetOutput,
+  formatUploadedImageRatio,
+  getPlatformDefaultLanguage,
+  getPlatformDefaultRatio,
+  getPlatformLanguageOptions,
+  getPlatformRatioOptions,
+  getUniqueRatioOptions,
+  normalizeLanguageForPlatform,
+  normalizeMarket,
+  normalizePlatform,
+  normalizeRatioForPlatform,
+  platformOptions,
+} from "./platformRules";
+
+describe("platform defaults", () => {
+  it("exposes the default ecommerce platform and outputs", () => {
+    expect(defaultEcommercePlatform).toBe("淘宝/天猫");
+    expect(defaultProductSetOutput).toBe("set");
+    expect(defaultCloneOutput).toBe("set");
+  });
+
+  it("lists platform labels for UI selectors", () => {
+    expect(platformOptions).toContain("淘宝/天猫");
+    expect(platformOptions).toContain("亚马逊 Amazon");
+    expect(platformOptions).toContain("TikTok Shop");
+  });
+});
+
+describe("normalizePlatform", () => {
+  it("normalizes legacy labels", () => {
+    expect(normalizePlatform("亚马逊Amazon")).toBe("亚马逊 Amazon");
+    expect(normalizePlatform("亚马逊")).toBe("亚马逊 Amazon");
+  });
+
+  it("falls back to the default platform for unknown labels", () => {
+    expect(normalizePlatform("unknown")).toBe("淘宝/天猫");
+  });
+});
+
+describe("platform ratios", () => {
+  it("returns mode-specific ratios", () => {
+    expect(getPlatformRatioOptions("淘宝/天猫", "set")).toContain("1000×1000px\u00a0\u00a0\u00a01:1");
+    expect(getPlatformDefaultRatio("淘宝/天猫", "video")).toBe("1080×1920px\u00a0\u00a0\u00a09:16");
+  });
+
+  it("normalizes an existing or partially matching ratio for a platform", () => {
+    expect(normalizeRatioForPlatform("淘宝/天猫", "1000×1000px\u00a0\u00a0\u00a01:1", "set")).toBe("1000×1000px\u00a0\u00a0\u00a01:1");
+    expect(normalizeRatioForPlatform("淘宝/天猫", "1000×1000px", "set")).toBe("1000×1000px\u00a0\u00a0\u00a01:1");
+  });
+
+  it("falls back to the mode default when no ratio matches", () => {
+    expect(normalizeRatioForPlatform("淘宝/天猫", "nope", "set")).toBe("1000×1000px\u00a0\u00a0\u00a01:1");
+  });
+
+  it("deduplicates ratio lists without changing order", () => {
+    expect(getUniqueRatioOptions(["1:1", "3:4", "1:1"])).toEqual(["1:1", "3:4"]);
+  });
+});
+
+describe("market and language rules", () => {
+  it("normalizes unknown markets to the default country", () => {
+    expect(normalizeMarket("火星")).toBe("中国");
+  });
+
+  it("uses Chinese by default for domestic platforms", () => {
+    expect(getPlatformDefaultLanguage("淘宝/天猫", "美国")).toBe("中文");
+  });
+
+  it("includes English for domestic platforms while preserving local languages", () => {
+    expect(getPlatformLanguageOptions("淘宝/天猫", "美国")).toEqual(["中文", "英文"]);
+  });
+
+  it("uses market languages for cross-border platforms", () => {
+    expect(getPlatformDefaultLanguage("亚马逊 Amazon", "日本")).toBe("日文");
+  });
+
+  it("normalizes language aliases and falls back when not available", () => {
+    expect(normalizeLanguageForPlatform("亚马逊 Amazon", "日本", "日语")).toBe("日文");
+    expect(normalizeLanguageForPlatform("亚马逊 Amazon", "日本", "德语")).toBe("日文");
+  });
+});
+
+describe("formatUploadedImageRatio", () => {
+  it("formats dimensions and aspect ratio", () => {
+    expect(formatUploadedImageRatio({ width: 750, height: 1000, format: "PNG" })).toBe("上传图片 750×1000px\u00a0\u00a0\u00a03:4\u00a0\u00a0\u00a0PNG");
+  });
+
+  it("falls back to original ratio when dimensions are missing", () => {
+    expect(formatUploadedImageRatio({ format: "JPG" })).toBe("上传图片\u00a0\u00a0\u00a0原图比例\u00a0\u00a0\u00a0JPG");
+  });
+});