1 files changed, 135 insertions, 0 deletions
diff --git a/dom/serviceworkers/ServiceWorkerUnregisterJob.cpp b/dom/serviceworkers/ServiceWorkerUnregisterJob.cpp
new file mode 100644
index 0000000000..5cf61e2a93
--- /dev/null
+++ b/dom/serviceworkers/ServiceWorkerUnregisterJob.cpp
@@ -0,0 +1,135 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ServiceWorkerUnregisterJob.h"
+
+#include "mozilla/Unused.h"
+#include "nsIPushService.h"
+#include "nsServiceManagerUtils.h"
+#include "nsThreadUtils.h"
+#include "ServiceWorkerManager.h"
+
+namespace mozilla::dom {
+
+class ServiceWorkerUnregisterJob::PushUnsubscribeCallback final
+    : public nsIUnsubscribeResultCallback {
+ public:
+  NS_DECL_ISUPPORTS
+
+  explicit PushUnsubscribeCallback(ServiceWorkerUnregisterJob* aJob)
+      : mJob(aJob) {
+    MOZ_ASSERT(NS_IsMainThread());
+  }
+
+  NS_IMETHOD
+  OnUnsubscribe(nsresult aStatus, bool) override {
+    // Warn if unsubscribing fails, but don't prevent the worker from
+    // unregistering.
+    Unused << NS_WARN_IF(NS_FAILED(aStatus));
+    mJob->Unregister();
+    return NS_OK;
+  }
+
+ private:
+  ~PushUnsubscribeCallback() = default;
+
+  RefPtr<ServiceWorkerUnregisterJob> mJob;
+};
+
+NS_IMPL_ISUPPORTS(ServiceWorkerUnregisterJob::PushUnsubscribeCallback,
+                  nsIUnsubscribeResultCallback)
+
+ServiceWorkerUnregisterJob::ServiceWorkerUnregisterJob(nsIPrincipal* aPrincipal,
+                                                       const nsACString& aScope)
+    : ServiceWorkerJob(Type::Unregister, aPrincipal, aScope, ""_ns),
+      mResult(false) {}
+
+bool ServiceWorkerUnregisterJob::GetResult() const {
+  MOZ_ASSERT(NS_IsMainThread());
+  return mResult;
+}
+
+ServiceWorkerUnregisterJob::~ServiceWorkerUnregisterJob() = default;
+
+void ServiceWorkerUnregisterJob::AsyncExecute() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (Canceled()) {
+    Finish(NS_ERROR_DOM_ABORT_ERR);
+    return;
+  }
+
+  // Push API, section 5: "When a service worker registration is unregistered,
+  // any associated push subscription must be deactivated." To ensure the
+  // service worker registration isn't cleared as we're unregistering, we
+  // unsubscribe first.
+  nsCOMPtr<nsIPushService> pushService =
+      do_GetService("@mozilla.org/push/Service;1");
+  if (NS_WARN_IF(!pushService)) {
+    Unregister();
+    return;
+  }
+  nsCOMPtr<nsIUnsubscribeResultCallback> unsubscribeCallback =
+      new PushUnsubscribeCallback(this);
+  nsresult rv = pushService->Unsubscribe(NS_ConvertUTF8toUTF16(mScope),
+                                         mPrincipal, unsubscribeCallback);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    Unregister();
+  }
+}
+
+void ServiceWorkerUnregisterJob::Unregister() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
+  if (Canceled() || !swm) {
+    Finish(NS_ERROR_DOM_ABORT_ERR);
+    return;
+  }
+
+  // Step 1 of the Unregister algorithm requires checking that the
+  // client origin matches the scope's origin.  We perform this in
+  // registration->update() method directly since we don't have that
+  // client information available here.
+
+  // "Let registration be the result of running [[Get Registration]]
+  // algorithm passing scope as the argument."
+  RefPtr<ServiceWorkerRegistrationInfo> registration =
+      swm->GetRegistration(mPrincipal, mScope);
+  if (!registration) {
+    // "If registration is null, then, resolve promise with false."
+    Finish(NS_OK);
+    return;
+  }
+
+  // Note, we send the message to remove the registration from disk now. This is
+  // necessary to ensure the registration is removed if the controlled
+  // clients are closed by shutting down the browser.
+  swm->MaybeSendUnregister(mPrincipal, mScope);
+
+  swm->EvictFromBFCache(registration);
+
+  // "Remove scope to registration map[job's scope url]."
+  swm->RemoveRegistration(registration);
+  MOZ_ASSERT(registration->IsUnregistered());
+
+  // "Resolve promise with true"
+  mResult = true;
+  InvokeResultCallbacks(NS_OK);
+
+  // "Invoke Try Clear Registration with registration"
+  if (!registration->IsControllingClients()) {
+    if (registration->IsIdle()) {
+      registration->Clear();
+    } else {
+      registration->ClearWhenIdle();
+    }
+  }
+
+  Finish(NS_OK);
+}
+
+}  // namespace mozilla::dom