Implementing client policy and controller.

components/offline_pages/client_policy_controller.h

+// Copyright 2016 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 COMPONENTS_OFFLINE_PAGES_CLIENT_POLICY_CONTROLLER_H_
+#define COMPONENTS_OFFLINE_PAGES_CLIENT_POLICY_CONTROLLER_H_
+
+#include <stdint.h>
+
+#include <map>
+#include <string>
+
+#include "base/time/time.h"
+#include "components/offline_pages/offline_page_client_policy.h"
+
+namespace offline_pages {
+
+// Currently used for fallbacks like tests.
+static const char kDefaultNamespace[] = "default";
+
+// This is the class which is a singleton for offline page model
+// to get client policies based on namespaces.
+class ClientPolicyController {
+ public:
+  ClientPolicyController();
+  ~ClientPolicyController();
+
+  // Generates a client policy from the input values.
+  static const OfflinePageClientPolicy MakePolicy(
+      const std::string& name_space,
+      LifetimePolicy::LifetimeType lifetime_type,
+      const base::TimeDelta& expiration_period,
+      int page_limit);
+
+  // Get the client policy for |name_space|.
+  const OfflinePageClientPolicy& GetPolicy(const std::string& name_space) const;
+
+ private:
+  // The map from name_space to a client policy. Will be generated
+  // as pre-defined values for now.
+  std::map<std::string, OfflinePageClientPolicy> policies_;
+
+  DISALLOW_COPY_AND_ASSIGN(ClientPolicyController);
+};
+
+}  // namespace offline_pages
+
+#endif  // COMPONENTS_OFFLINE_PAGES_CLIENT_POLICY_CONTROLLER_H_