First CL for the about:policy page. This only implements the policy section of the page.

chrome/browser/policy/configuration_policy_reader.cc

+// Copyright (c) 2011 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/policy/configuration_policy_reader.h"
+
+#include <map>
+#include <set>
+#include <vector>
+
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/policy/browser_policy_connector.h"
+#include "chrome/browser/policy/configuration_policy_pref_store.h"
+#include "chrome/browser/policy/configuration_policy_store_interface.h"
+
+namespace policy {
+
+// This class functions as a container for policy status information used by the
+// ConfigurationPolicyReader class. It obtains policy values from a
+// ConfigurationPolicyProvider and maps them to their status information.
+class ConfigurationPolicyStatusKeeper
+    : public ConfigurationPolicyStoreInterface {
+  public:
+   ConfigurationPolicyStatusKeeper(ConfigurationPolicyProvider* provider,
+                                   PolicyStatusInfo::PolicyLevel policy_level);
+   virtual ~ConfigurationPolicyStatusKeeper();
+
+   // ConfigurationPolicyStoreInterface methods.
+   virtual void Apply(ConfigurationPolicyType policy, base::Value* value);
+
+   // Returns a pointer to a DictionaryValue containing the status information
+   // of the policy |policy|. The caller acquires ownership of the returned
+   // value. Returns NULL if no such policy is stored in this keeper.
+   DictionaryValue* GetPolicyStatus(ConfigurationPolicyType policy) const;
+
+  private:
+   typedef std::map<ConfigurationPolicyType, PolicyStatusInfo>
+       PolicyStatusMap;
+   typedef std::map<ConfigurationPolicyType, string16> PolicyNameMap;
+   typedef ConfigurationPolicyProvider::PolicyDefinitionList
+       PolicyDefinitionList;
+
+   // Mapping from ConfigurationPolicyType to PolicyStatusInfo.
+   PolicyStatusMap policy_map_;
+
+   // The level of the policies stored in this keeper (mandatory or
+   // recommended).
+   PolicyStatusInfo::PolicyLevel policy_level_;
+
+   DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyStatusKeeper);
+};
+
+// ConfigurationPolicyStatusKeeper
+ConfigurationPolicyStatusKeeper::ConfigurationPolicyStatusKeeper(
+    ConfigurationPolicyProvider* provider,
+    PolicyStatusInfo::PolicyLevel policy_level) : policy_level_(policy_level) {
+
+  if (!provider->Provide(this))
+    LOG(WARNING) << "Failed to get policy from provider.";
+}
+
+ConfigurationPolicyStatusKeeper::~ConfigurationPolicyStatusKeeper() {
+  policy_map_.clear();
+}
+
+void ConfigurationPolicyStatusKeeper::Apply(
+    ConfigurationPolicyType policy, base::Value* value) {
+  string16 name = PolicyStatus::GetPolicyName(policy);
+
+  // This should never happen.
+  if (name == string16()) {
+    LOG(WARNING) << "Received unknown policy from provider.";
+    return;
+  }
+
+  // TODO(simo) actually determine whether the policy is a user or a device one
+  // and whether the policy could be enforced or not once this information
+  // is available.
+  PolicyStatusInfo info(name,
+                        PolicyStatusInfo::USER,
+                        policy_level_,
+                        value,
+                        PolicyStatusInfo::ENFORCED,
+                        string16());
+  policy_map_[policy] = info;
+}
+
+DictionaryValue* ConfigurationPolicyStatusKeeper::GetPolicyStatus(
+    ConfigurationPolicyType policy) const {
+  PolicyStatusMap::const_iterator entry = policy_map_.find(policy);
+  return entry != policy_map_.end() ?
+      (entry->second).GetDictionaryValue() : NULL;
+}
+
+// ConfigurationPolicyReader
+ConfigurationPolicyReader::~ConfigurationPolicyReader() {
+}
+
+void ConfigurationPolicyReader::OnUpdatePolicy() {
+  Refresh();
+}
+
+void ConfigurationPolicyReader::OnProviderGoingAway() {
+  provider_ = NULL;
+}
+
+// static
+ConfigurationPolicyReader*
+    ConfigurationPolicyReader::CreateManagedPlatformPolicyReader(
+    PolicyStatusInfo::PolicyLevel policy_level) {
+  BrowserPolicyConnector* connector =
+      g_browser_process->browser_policy_connector();
+  return new ConfigurationPolicyReader(
+    connector->GetManagedPlatformProvider(), policy_level);
+}
+
+// static
+ConfigurationPolicyReader*
+    ConfigurationPolicyReader::CreateManagedCloudPolicyReader(
+    PolicyStatusInfo::PolicyLevel policy_level) {
+  BrowserPolicyConnector* connector =
+      g_browser_process->browser_policy_connector();
+  return new ConfigurationPolicyReader(
+      connector->GetManagedCloudProvider(), policy_level);
+}
+
+// static
+ConfigurationPolicyReader*
+    ConfigurationPolicyReader::CreateRecommendedPlatformPolicyReader(
+    PolicyStatusInfo::PolicyLevel policy_level) {
+  BrowserPolicyConnector* connector =
+      g_browser_process->browser_policy_connector();
+  return new ConfigurationPolicyReader(
+      connector->GetRecommendedPlatformProvider(), policy_level);
+}
+
+// static
+ConfigurationPolicyReader*
+    ConfigurationPolicyReader::CreateRecommendedCloudPolicyReader(
+    PolicyStatusInfo::PolicyLevel policy_level) {
+  BrowserPolicyConnector* connector =
+      g_browser_process->browser_policy_connector();
+  return new ConfigurationPolicyReader(
+      connector->GetRecommendedCloudProvider(), policy_level);
+}
+
+DictionaryValue* ConfigurationPolicyReader::GetPolicyStatus(
+    ConfigurationPolicyType policy) const {
+  return policy_keeper_->GetPolicyStatus(policy);
+}
+
+ConfigurationPolicyReader::ConfigurationPolicyReader(
+    ConfigurationPolicyProvider* provider,
+    PolicyStatusInfo::PolicyLevel policy_level)
+    : provider_(provider),
+      policy_level_(policy_level) {
+  if (provider_) {
+    // Read initial policy.
+    policy_keeper_.reset(
+        new ConfigurationPolicyStatusKeeper(provider, policy_level));
+    registrar_.Init(provider_, this);
+  }
+}
+
+void ConfigurationPolicyReader::Refresh() {
+  if (!provider_)
+    return;
+
+  // Read policy state into a new keeper and swap out old keeper.
+  scoped_ptr<ConfigurationPolicyStatusKeeper> new_keeper(
+      new ConfigurationPolicyStatusKeeper(provider_, policy_level_));
+  policy_keeper_.reset(new_keeper.release());
+
+  // TODO(simo) create an observer class which PolicyStatus can implement so
+  // that it can be notified of changes.
+}
+
+// PolicyStatus
+PolicyStatus::PolicyStatus() {
+  managed_platform_.reset(
+      ConfigurationPolicyReader::CreateManagedPlatformPolicyReader(
+          PolicyStatusInfo::MANDATORY));
+  managed_cloud_.reset(
+      ConfigurationPolicyReader::CreateManagedCloudPolicyReader(
+          PolicyStatusInfo::MANDATORY));
+  recommended_platform_.reset(
+      ConfigurationPolicyReader::CreateRecommendedPlatformPolicyReader(
+          PolicyStatusInfo::RECOMMENDED));
+  recommended_cloud_.reset(
+      ConfigurationPolicyReader::CreateRecommendedCloudPolicyReader(
+          PolicyStatusInfo::RECOMMENDED));
+}
+
+PolicyStatus::~PolicyStatus() {
+}
+
+ListValue* PolicyStatus::GetPolicyStatusList(bool& any_policies_sent) const {
+  ListValue* result = new ListValue();
+  std::vector<PolicyStatusInfo> unsent_policies;
+
+  any_policies_sent = false;
+  const PolicyDefinitionList* supported_policies =
+      ConfigurationPolicyPrefStore::GetChromePolicyDefinitionList();
+  const PolicyDefinitionList::Entry* policy = supported_policies->begin;
+  for ( ; policy != supported_policies->end; ++policy) {
+    if (!AddPolicyFromReaders(policy->policy_type, result)) {
+      PolicyStatusInfo info(ASCIIToUTF16(policy->name),
+                            PolicyStatusInfo::SOURCE_TYPE_UNDEFINED,
+                            PolicyStatusInfo::LEVEL_UNDEFINED,
+                            Value::CreateNullValue(),
+                            PolicyStatusInfo::STATUS_UNDEFINED,
+                            string16());
+      unsent_policies.push_back(info);
+    } else {
+      any_policies_sent = true;
+    }
+  }
+
+  // Add policies that weren't actually sent from providers to list.
+  std::vector<PolicyStatusInfo>::const_iterator info = unsent_policies.begin();
+  for ( ; info != unsent_policies.end(); ++info)
+    result->Append((*info).GetDictionaryValue());
+
+  unsent_policies.clear();
+  return result;
+}
+
+// static
+string16 PolicyStatus::GetPolicyName(ConfigurationPolicyType policy_type) {
+  static std::map<ConfigurationPolicyType, string16> name_map;
+  static const ConfigurationPolicyProvider::PolicyDefinitionList*
+      supported_policies;
+
+  if (!supported_policies) {
+    supported_policies =
+        ConfigurationPolicyPrefStore::GetChromePolicyDefinitionList();
+
+    // Create mapping from ConfigurationPolicyTypes to actual policy names.
+    const ConfigurationPolicyProvider::PolicyDefinitionList::Entry* entry =
+        supported_policies->begin;
+    for ( ; entry != supported_policies->end; ++entry)
+      name_map[entry->policy_type] = ASCIIToUTF16(entry->name);
+  }
+
+  std::map<ConfigurationPolicyType, string16>::const_iterator entry =
+      name_map.find(policy_type);
+
+  // This should never happen.
+  if (entry == name_map.end())
+    return string16();
+
+  return entry->second;
+}
+
+bool PolicyStatus::AddPolicyFromReaders(
+    ConfigurationPolicyType policy, ListValue* list) const {
+  DictionaryValue* mp_policy =
+      managed_platform_->GetPolicyStatus(policy);
+  DictionaryValue* mc_policy =
+      managed_cloud_->GetPolicyStatus(policy);
+  DictionaryValue* rp_policy =
+      recommended_platform_->GetPolicyStatus(policy);
+  DictionaryValue* rc_policy =
+      recommended_cloud_->GetPolicyStatus(policy);
+
+  bool added_policy = mp_policy || mc_policy || rp_policy || rc_policy;
+
+  if (mp_policy)
+    list->Append(mp_policy);
+  if (mc_policy)
+    list->Append(mc_policy);
+  if (rp_policy)
+    list->Append(rp_policy);
+  if (rc_policy)
+    list->Append(rc_policy);
+
+  return added_policy;
+}
+
+} // namespace policy