feat(worker): cross-channel CRC-fingerprint repost check for the forward path

2026-09-21 13:31:42 +00:00 · 2026-07-31 05:00:14 +02:00
parent a46e746298
commit 960da01ec6
4 changed files with 117 additions and 24 deletions
@@ -0,0 +1,35 @@
+import { describe, it, expect, vi } from "vitest";
+
+const candidate = {
+  id: "pkg-1", archiveType: "ZIP", fileName: "a.zip", fileCount: 3, fileSize: 100n,
+  destMessageId: 1n, destMessageIds: [1n], destChannel: { telegramId: 999n },
+};
+
+vi.mock("../db/queries.js", () => ({
+  findFingerprintDedupCandidates: vi.fn(async () => [candidate]),
+}));
+const resolveMock = vi.fn(async (..._args: unknown[]) => [{ path: "x", fileName: "x", extension: null, compressedSize: 1n, uncompressedSize: 1n, crc32: "AAAA" }]);
+const compareMock = vi.fn();
+vi.mock("../provenance-backfill.js", () => ({
+  resolveCandidateFingerprintEntries: (...args: unknown[]) => resolveMock(...args),
+  compareFingerprints: (...args: unknown[]) => compareMock(...args),
+}));
+
+import { checkFingerprintRepost } from "./forward-repost-check.js";
+import type { FileEntry } from "./zip-reader.js";
+
+const newEntries: FileEntry[] = [{ path: "x", fileName: "x", extension: null, compressedSize: 1n, uncompressedSize: 1n, crc32: "AAAA" }];
+
+describe("checkFingerprintRepost", () => {
+  it("reports a duplicate when a candidate's fingerprint matches", async () => {
+    compareMock.mockReturnValueOnce("match");
+    const result = await checkFingerprintRepost({} as never, newEntries, "a.zip", 100n);
+    expect(result).toEqual({ isDuplicate: true, matchedPackageId: "pkg-1" });
+  });
+
+  it("reports no duplicate when no candidate matches", async () => {
+    compareMock.mockReturnValueOnce("mismatch");
+    const result = await checkFingerprintRepost({} as never, newEntries, "a.zip", 100n);
+    expect(result).toEqual({ isDuplicate: false, matchedPackageId: null });
+  });
+});