Add CloudPolicyService

chrome/browser/policy/cloud_policy_service.h

+// Copyright (c) 2012 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.
+
+#ifndef CHROME_BROWSER_POLICY_CLOUD_POLICY_SERVICE_H_
+#define CHROME_BROWSER_POLICY_CLOUD_POLICY_SERVICE_H_
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/callback_forward.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/policy/cloud_policy_client.h"
+#include "chrome/browser/policy/cloud_policy_constants.h"
+#include "chrome/browser/policy/cloud_policy_store.h"
+
+namespace policy {
+
+// Coordinates cloud policy handling, hosting the cloud policy client, fetching
+// new policy, and updating the local policy cache when new policy becomes
+// available.
+class CloudPolicyService : public CloudPolicyClient::Observer,
+                           public CloudPolicyStore::Observer {
+ public:
+  CloudPolicyService(scoped_ptr<CloudPolicyClient> client,
+                     scoped_ptr<CloudPolicyStore> store);
+  virtual ~CloudPolicyService();
+
+  // Returns the domain that manages this user/device, according to the current
+  // policy blob. Empty if not managed/not available.
+  std::string ManagedBy() const;
+
+  // Refreshes policy. |callback| will be invoked after the operation completes
+  // or aborts because of errors.
+  void RefreshPolicy(const base::Closure& callback);
+
+  CloudPolicyClient* client() { return client_.get(); }
+  CloudPolicyStore* store() { return store_.get(); }
+
+  // CloudPolicyClient::Observer:
+  virtual void OnPolicyFetched(CloudPolicyClient* client) OVERRIDE;
+  virtual void OnRegistrationStateChanged(CloudPolicyClient* client) OVERRIDE;
+  virtual void OnClientError(CloudPolicyClient* client) OVERRIDE;
+
+  // CloudPolicyStore::Observer:
+  virtual void OnStoreLoaded(CloudPolicyStore* store) OVERRIDE;
+  virtual void OnStoreError(CloudPolicyStore* store) OVERRIDE;
+
+ private:
+  // Invokes the refresh callbacks and clears refresh state.
+  void RefreshCompleted();
+
+  // The client used to talk to the cloud.
+  scoped_ptr<CloudPolicyClient> client_;
+
+  // Takes care of persisting and decoding cloud policy.
+  scoped_ptr<CloudPolicyStore> store_;
+
+  // Tracks the state of a pending refresh operation, if any.
+  enum {
+    // No refresh pending.
+    REFRESH_NONE,
+    // Policy fetch is pending.
+    REFRESH_POLICY_FETCH,
+    // Policy store is pending.
+    REFRESH_POLICY_STORE,
+  } refresh_state_;
+
+  // Callbacks to invoke upon policy refresh.
+  std::vector<base::Closure> refresh_callbacks_;
+
+  DISALLOW_COPY_AND_ASSIGN(CloudPolicyService);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_POLICY_CLOUD_POLICY_SERVICE_H_