Handle policy refresh internally in ConfigurationPolicyPrefStore.

chrome/browser/policy/configuration_policy_pref_store.h

 // Copyright (c) 2010 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_CONFIGURATION_POLICY_PREF_STORE_H_
 #define CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PREF_STORE_H_
 #pragma once
 
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
-#include "base/gtest_prod_util.h"
+#include "base/observer_list.h"
 #include "base/scoped_ptr.h"
 #include "base/values.h"
 #include "chrome/browser/policy/configuration_policy_provider.h"
 #include "chrome/browser/policy/configuration_policy_store_interface.h"
+#include "chrome/common/notification_observer.h"
+#include "chrome/common/notification_registrar.h"
 #include "chrome/common/pref_store.h"
 
 class Profile;
 
 namespace policy {
 
-// An implementation of the |PrefStore| that holds a Dictionary
-// created through applied policy.
+class ConfigurationPolicyPrefKeeper;
+
+// An implementation of PrefStore that bridges policy settings as read from a
+// ConfigurationPolicyProvider to preferences.
 class ConfigurationPolicyPrefStore : public PrefStore,
-                                     public ConfigurationPolicyStoreInterface {
+                                     public NotificationObserver {
  public:
-  typedef std::set<const char*> ProxyPreferenceSet;
-
   // The ConfigurationPolicyPrefStore does not take ownership of the
   // passed-in |provider|.
   explicit ConfigurationPolicyPrefStore(ConfigurationPolicyProvider* provider);
   virtual ~ConfigurationPolicyPrefStore();
 
   // PrefStore methods:
+  virtual void AddObserver(Observer* observer);
+  virtual void RemoveObserver(Observer* observer);
+  virtual bool IsInitializationComplete() const;
   virtual ReadResult GetValue(const std::string& key, Value** result) const;
 
-  virtual DictionaryValue* prefs() const;
-
-  // ConfigurationPolicyStore methods:
-  virtual void Apply(ConfigurationPolicyType setting, Value* value);
-
   // Creates a ConfigurationPolicyPrefStore that reads managed platform policy.
   static ConfigurationPolicyPrefStore* CreateManagedPlatformPolicyPrefStore();
 
   // Creates a ConfigurationPolicyPrefStore that supplies policy from
   // the device management server.
   static ConfigurationPolicyPrefStore* CreateDeviceManagementPolicyPrefStore(
       Profile* profile);
 
   // Creates a ConfigurationPolicyPrefStore that reads recommended policy.
   static ConfigurationPolicyPrefStore* CreateRecommendedPolicyPrefStore();
 
   // Returns the default policy definition list for Chrome.
   static const ConfigurationPolicyProvider::PolicyDefinitionList*
       GetChromePolicyDefinitionList();
 
  private:
-  // Policies that map to a single preference are handled
-  // by an automated converter. Each one of these policies
-  // has an entry in |simple_policy_map_| with the following type.
-  struct PolicyToPreferenceMapEntry {
-    Value::ValueType value_type;
-    ConfigurationPolicyType policy_type;
-    const char* preference_path;  // A DictionaryValue path, not a file path.
-  };
+  // TODO(mnissler): Remove after provider has proper observer interface.
+  // NotificationObserver overrides:
+  void Observe(NotificationType type,
+               const NotificationSource& source,
+               const NotificationDetails& details);
 
-  static const PolicyToPreferenceMapEntry kSimplePolicyMap[];
-  static const PolicyToPreferenceMapEntry kProxyPolicyMap[];
-  static const PolicyToPreferenceMapEntry kDefaultSearchPolicyMap[];
+  // Refreshes policy information, rereading policy from the provider and
+  // sending out change notifications as appropriate.
+  void Refresh();
+
   static const ConfigurationPolicyProvider::PolicyDefinitionList
       kPolicyDefinitionList;
 
+  // The policy provider from which policy settings are read.
   ConfigurationPolicyProvider* provider_;
-  scoped_ptr<DictionaryValue> prefs_;
 
-  // Temporary cache that stores values until FinalizeProxyPolicySettings()
-  // is called.
-  std::map<ConfigurationPolicyType, Value*> proxy_policies_;
+  // Initialization status as reported by the policy provider the last time we
+  // queried it.
+  bool initialization_complete_;
 
-  bool HasProxyPolicy(ConfigurationPolicyType policy) const;
+  // Current policy preferences.
+  scoped_ptr<ConfigurationPolicyPrefKeeper> policy_keeper_;
 
-  // Returns the map entry that corresponds to |policy| in the map.
-  const PolicyToPreferenceMapEntry* FindPolicyInMap(
-      ConfigurationPolicyType policy,
-      const PolicyToPreferenceMapEntry* map,
-      int size) const;
+  // TODO(mnissler): Remove after provider has proper observer interface.
+  NotificationRegistrar registrar_;
 
-  // Remove the preferences found in the map from |prefs_|.  Returns true if
-  // any such preferences were found and removed.
-  bool RemovePreferencesOfMap(const PolicyToPreferenceMapEntry* map,
-                              int table_size);
-
-  bool ApplyPolicyFromMap(ConfigurationPolicyType policy,
-                          Value* value,
-                          const PolicyToPreferenceMapEntry* map,
-                          int size);
-
-  // Processes proxy-specific policies. Returns true if the specified policy
-  // is a proxy-related policy. ApplyProxyPolicy assumes the ownership
-  // of |value| in the case that the policy is proxy-specific.
-  bool ApplyProxyPolicy(ConfigurationPolicyType policy, Value* value);
-
-  // Handles sync-related policies. Returns true if the policy was handled.
-  // Assumes ownership of |value| in that case.
-  bool ApplySyncPolicy(ConfigurationPolicyType policy, Value* value);
-
-  // Handles policies that affect AutoFill. Returns true if the policy was
-  // handled and assumes ownership of |value| in that case.
-  bool ApplyAutoFillPolicy(ConfigurationPolicyType policy, Value* value);
-
-  // Make sure that the |path| if present in |prefs_|.  If not, set it to
-  // a blank string.
-  void EnsureStringPrefExists(const std::string& path);
-
-  // If the required entries for default search are specified and valid,
-  // finalizes the policy-specified configuration by initializing the
-  // unspecified map entries.  Otherwise wipes all default search related
-  // map entries from |prefs_|.
-  void FinalizeDefaultSearchPolicySettings();
-
-  // If the required entries for the proxy settings are specified and valid,
-  // finalizes the policy-specified configuration by initializing the
-  // respective values in |prefs_|.
-  void FinalizeProxyPolicySettings();
-
-  // Returns true if the policy values stored in proxy_* represent a valid
-  // proxy configuration.
-  bool CheckProxySettings();
-
-  // Assumes CheckProxySettings returns true and applies the values stored
-  // in proxy_*.
-  void ApplyProxySettings();
+  ObserverList<Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyPrefStore);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CONFIGURATION_POLICY_PREF_STORE_H_