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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/extensions/api/system_private/system_private_api.h"
      6 
      7 #include "base/prefs/pref_service.h"
      8 #include "base/values.h"
      9 #include "chrome/browser/browser_process.h"
     10 #include "chrome/browser/extensions/event_router_forwarder.h"
     11 #include "chrome/browser/profiles/profile.h"
     12 #include "chrome/common/extensions/api/system_private.h"
     13 #include "chrome/common/pref_names.h"
     14 #include "google_apis/google_api_keys.h"
     15 
     16 #if defined(OS_CHROMEOS)
     17 #include "chromeos/dbus/dbus_thread_manager.h"
     18 #include "chromeos/dbus/update_engine_client.h"
     19 #else
     20 #include "chrome/browser/upgrade_detector.h"
     21 #endif
     22 
     23 namespace {
     24 
     25 // Maps prefs::kIncognitoModeAvailability values (0 = enabled, ...)
     26 // to strings exposed to extensions.
     27 const char* kIncognitoModeAvailabilityStrings[] = {
     28   "enabled",
     29   "disabled",
     30   "forced"
     31 };
     32 
     33 // Property keys.
     34 const char kBrightnessKey[] = "brightness";
     35 const char kDownloadProgressKey[] = "downloadProgress";
     36 const char kIsVolumeMutedKey[] = "isVolumeMuted";
     37 const char kStateKey[] = "state";
     38 const char kUserInitiatedKey[] = "userInitiated";
     39 const char kVolumeKey[] = "volume";
     40 
     41 // System update states.
     42 const char kNotAvailableState[] = "NotAvailable";
     43 const char kNeedRestartState[] = "NeedRestart";
     44 
     45 #if defined(OS_CHROMEOS)
     46 const char kUpdatingState[] = "Updating";
     47 #endif  // defined(OS_CHROMEOS)
     48 
     49 // Dispatches an extension event with |argument|
     50 void DispatchEvent(const std::string& event_name, base::Value* argument) {
     51   scoped_ptr<base::ListValue> list_args(new base::ListValue());
     52   if (argument) {
     53     list_args->Append(argument);
     54   }
     55   g_browser_process->extension_event_router_forwarder()->
     56       BroadcastEventToRenderers(event_name, list_args.Pass(), GURL());
     57 }
     58 
     59 }  // namespace
     60 
     61 namespace extensions {
     62 
     63 namespace system_private = api::system_private;
     64 
     65 bool SystemPrivateGetIncognitoModeAvailabilityFunction::RunSync() {
     66   PrefService* prefs = GetProfile()->GetPrefs();
     67   int value = prefs->GetInteger(prefs::kIncognitoModeAvailability);
     68   EXTENSION_FUNCTION_VALIDATE(
     69       value >= 0 &&
     70       value < static_cast<int>(arraysize(kIncognitoModeAvailabilityStrings)));
     71   SetResult(new base::StringValue(kIncognitoModeAvailabilityStrings[value]));
     72   return true;
     73 }
     74 
     75 bool SystemPrivateGetUpdateStatusFunction::RunSync() {
     76   std::string state;
     77   double download_progress = 0;
     78 #if defined(OS_CHROMEOS)
     79   // With UpdateEngineClient, we can provide more detailed information about
     80   // system updates on ChromeOS.
     81   const chromeos::UpdateEngineClient::Status status =
     82       chromeos::DBusThreadManager::Get()->GetUpdateEngineClient()->
     83       GetLastStatus();
     84   // |download_progress| is set to 1 after download finishes
     85   // (i.e. verify, finalize and need-reboot phase) to indicate the progress
     86   // even though |status.download_progress| is 0 in these phases.
     87   switch (status.status) {
     88     case chromeos::UpdateEngineClient::UPDATE_STATUS_ERROR:
     89       state = kNotAvailableState;
     90       break;
     91     case chromeos::UpdateEngineClient::UPDATE_STATUS_IDLE:
     92       state = kNotAvailableState;
     93       break;
     94     case chromeos::UpdateEngineClient::UPDATE_STATUS_CHECKING_FOR_UPDATE:
     95       state = kNotAvailableState;
     96       break;
     97     case chromeos::UpdateEngineClient::UPDATE_STATUS_UPDATE_AVAILABLE:
     98       state = kUpdatingState;
     99       break;
    100     case chromeos::UpdateEngineClient::UPDATE_STATUS_DOWNLOADING:
    101       state = kUpdatingState;
    102       download_progress = status.download_progress;
    103       break;
    104     case chromeos::UpdateEngineClient::UPDATE_STATUS_VERIFYING:
    105       state = kUpdatingState;
    106       download_progress = 1;
    107       break;
    108     case chromeos::UpdateEngineClient::UPDATE_STATUS_FINALIZING:
    109       state = kUpdatingState;
    110       download_progress = 1;
    111       break;
    112     case chromeos::UpdateEngineClient::UPDATE_STATUS_UPDATED_NEED_REBOOT:
    113       state = kNeedRestartState;
    114       download_progress = 1;
    115       break;
    116     case chromeos::UpdateEngineClient::UPDATE_STATUS_REPORTING_ERROR_EVENT:
    117     case chromeos::UpdateEngineClient::UPDATE_STATUS_ATTEMPTING_ROLLBACK:
    118       state = kNotAvailableState;
    119       break;
    120   }
    121 #else
    122   if (UpgradeDetector::GetInstance()->notify_upgrade()) {
    123     state = kNeedRestartState;
    124     download_progress = 1;
    125   } else {
    126     state = kNotAvailableState;
    127   }
    128 #endif
    129   base::DictionaryValue* dict = new base::DictionaryValue();
    130   dict->SetString(kStateKey, state);
    131   dict->SetDouble(kDownloadProgressKey, download_progress);
    132   SetResult(dict);
    133 
    134   return true;
    135 }
    136 
    137 bool SystemPrivateGetApiKeyFunction::RunSync() {
    138   SetResult(new base::StringValue(google_apis::GetAPIKey()));
    139   return true;
    140 }
    141 
    142 void DispatchVolumeChangedEvent(double volume, bool is_volume_muted) {
    143   base::DictionaryValue* dict = new base::DictionaryValue();
    144   dict->SetDouble(kVolumeKey, volume);
    145   dict->SetBoolean(kIsVolumeMutedKey, is_volume_muted);
    146   DispatchEvent(system_private::OnVolumeChanged::kEventName, dict);
    147 }
    148 
    149 void DispatchBrightnessChangedEvent(int brightness, bool user_initiated) {
    150   base::DictionaryValue* dict = new base::DictionaryValue();
    151   dict->SetInteger(kBrightnessKey, brightness);
    152   dict->SetBoolean(kUserInitiatedKey, user_initiated);
    153   DispatchEvent(system_private::OnBrightnessChanged::kEventName, dict);
    154 }
    155 
    156 void DispatchScreenUnlockedEvent() {
    157   DispatchEvent(system_private::OnScreenUnlocked::kEventName, NULL);
    158 }
    159 
    160 void DispatchWokeUpEvent() {
    161   DispatchEvent(system_private::OnWokeUp::kEventName, NULL);
    162 }
    163 
    164 }  // namespace extensions
    165