Cache force-installed apps/extensions in device-local accounts

chrome/browser/chromeos/extensions/device_local_account_external_policy_loader.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/chromeos/extensions/device_local_account_external_policy_loader.h"
+
+#include "base/callback.h"
+#include "base/logging.h"
+#include "base/prefs/pref_value_map.h"
+#include "base/values.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/extensions/policy_handlers.h"
+#include "chrome/browser/policy/policy_map.h"
+#include "chrome/common/pref_names.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace chromeos {
+
+DeviceLocalAccountExternalPolicyLoader::
+    DeviceLocalAccountExternalPolicyLoader(policy::CloudPolicyStore* store,
+                                           const base::FilePath& cache_dir)
+    : store_(store),
+      cache_dir_(cache_dir) {
+}
+
+bool DeviceLocalAccountExternalPolicyLoader::IsCacheRunning() const {
+  return external_cache_;
+}
+
+void DeviceLocalAccountExternalPolicyLoader::StartCache(
+    const scoped_refptr<base::SequencedTaskRunner>& cache_task_runner) {
+  DCHECK(!external_cache_);
+  store_->AddObserver(this);
+  external_cache_.reset(new ExternalCache(
+      cache_dir_,
+      g_browser_process->system_request_context(),
+      cache_task_runner,
+      this,
+      true  /* always_check_updates */,
+      false  /* wait_for_cache_initialization */));
+
+  if (store_->is_initialized())
+    UpdateExtensionListFromStore();
+}
+
+void DeviceLocalAccountExternalPolicyLoader::StopCache(
+    const base::Closure& callback) {
+  if (external_cache_) {
+    external_cache_->Shutdown(callback);
+    external_cache_.reset();
+    store_->RemoveObserver(this);
+  }
+
+  base::DictionaryValue empty_prefs;
+  OnExtensionListsUpdated(&empty_prefs);
+}
+
+void DeviceLocalAccountExternalPolicyLoader::StartLoading() {
+  if (prefs_)
+    LoadFinished();
+}
+
+void DeviceLocalAccountExternalPolicyLoader::OnStoreLoaded(
+    policy::CloudPolicyStore* store) {
+  DCHECK(external_cache_);
+  DCHECK_EQ(store_, store);
+  UpdateExtensionListFromStore();
+}
+
+void DeviceLocalAccountExternalPolicyLoader::OnStoreError(
+    policy::CloudPolicyStore* store) {
+  DCHECK(external_cache_);
+  DCHECK_EQ(store_, store);
+}
+
+void DeviceLocalAccountExternalPolicyLoader::OnExtensionListsUpdated(
+    const base::DictionaryValue* prefs) {
+  DCHECK(external_cache_ || prefs->empty());
+  prefs_.reset(prefs->DeepCopy());
+  LoadFinished();
+}
+
+DeviceLocalAccountExternalPolicyLoader::
+    ~DeviceLocalAccountExternalPolicyLoader() {
+  DCHECK(!external_cache_);
+}
+
+void DeviceLocalAccountExternalPolicyLoader::UpdateExtensionListFromStore() {
+  scoped_ptr<base::DictionaryValue> prefs(new base::DictionaryValue);
+  const policy::PolicyMap& policy_map = store_->policy_map();
+  extensions::ExtensionInstallForcelistPolicyHandler policy_handler;
+  if (policy_handler.CheckPolicySettings(policy_map, NULL)) {
+    PrefValueMap pref_value_map;
+    policy_handler.ApplyPolicySettings(policy_map, &pref_value_map);
+    const base::Value* value = NULL;
+    const base::DictionaryValue* dict = NULL;
+    if (pref_value_map.GetValue(prefs::kExtensionInstallForceList, &value) &&
+        value->GetAsDictionary(&dict)) {
+      prefs.reset(dict->DeepCopy());
+    }
+  }
+
+  external_cache_->UpdateExtensionsList(prefs.Pass());
+}
+
+}  // namespace chromeos