refactor(zalouser): extract policy and message helpers

extensions/zalouser/src/group-policy.test.ts

@@ -0,0 +1,49 @@
+import { describe, expect, it } from "vitest";
+import {
+  buildZalouserGroupCandidates,
+  findZalouserGroupEntry,
+  isZalouserGroupEntryAllowed,
+  normalizeZalouserGroupSlug,
+} from "./group-policy.js";
+
+describe("zalouser group policy helpers", () => {
+  it("normalizes group slug names", () => {
+    expect(normalizeZalouserGroupSlug(" Team Alpha ")).toBe("team-alpha");
+    expect(normalizeZalouserGroupSlug("#Roadmap Updates")).toBe("roadmap-updates");
+  });
+
+  it("builds ordered candidates with optional aliases", () => {
+    expect(
+      buildZalouserGroupCandidates({
+        groupId: "123",
+        groupChannel: "chan-1",
+        groupName: "Team Alpha",
+        includeGroupIdAlias: true,
+      }),
+    ).toEqual(["123", "group:123", "chan-1", "Team Alpha", "team-alpha", "*"]);
+  });
+
+  it("finds the first matching group entry", () => {
+    const groups = {
+      "group:123": { allow: true },
+      "team-alpha": { requireMention: false },
+      "*": { requireMention: true },
+    };
+    const entry = findZalouserGroupEntry(
+      groups,
+      buildZalouserGroupCandidates({
+        groupId: "123",
+        groupName: "Team Alpha",
+        includeGroupIdAlias: true,
+      }),
+    );
+    expect(entry).toEqual({ allow: true });
+  });
+
+  it("evaluates allow/enable flags", () => {
+    expect(isZalouserGroupEntryAllowed({ allow: true, enabled: true })).toBe(true);
+    expect(isZalouserGroupEntryAllowed({ allow: false })).toBe(false);
+    expect(isZalouserGroupEntryAllowed({ enabled: false })).toBe(false);
+    expect(isZalouserGroupEntryAllowed(undefined)).toBe(false);
+  });
+});