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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/chromeos/upgrade_detector_chromeos.h"
      6 
      7 #include "base/memory/singleton.h"
      8 #include "chromeos/dbus/dbus_thread_manager.h"
      9 
     10 namespace {
     11 
     12 // How long to wait (each cycle) before checking which severity level we should
     13 // be at. Once we reach the highest severity, the timer will stop.
     14 const int kNotifyCycleTimeMs = 20 * 60 * 1000;  // 20 minutes.
     15 
     16 }  // namespace
     17 
     18 using chromeos::DBusThreadManager;
     19 using chromeos::UpdateEngineClient;
     20 
     21 UpgradeDetectorChromeos::UpgradeDetectorChromeos() : initialized_(false) {
     22 }
     23 
     24 UpgradeDetectorChromeos::~UpgradeDetectorChromeos() {
     25 }
     26 
     27 void UpgradeDetectorChromeos::Init() {
     28   DBusThreadManager::Get()->GetUpdateEngineClient()->AddObserver(this);
     29   initialized_ = true;
     30 }
     31 
     32 void UpgradeDetectorChromeos::Shutdown() {
     33   // Init() may not be called from tests.
     34   if (!initialized_)
     35     return;
     36   DBusThreadManager::Get()->GetUpdateEngineClient()->RemoveObserver(this);
     37 }
     38 
     39 void UpgradeDetectorChromeos::UpdateStatusChanged(
     40     const UpdateEngineClient::Status& status) {
     41   if (status.status != UpdateEngineClient::UPDATE_STATUS_UPDATED_NEED_REBOOT)
     42     return;
     43 
     44   NotifyUpgradeDetected();
     45 
     46   // ChromeOS shows upgrade arrow once the upgrade becomes available.
     47   NotifyOnUpgrade();
     48 
     49   // Setup timer to to move along the upgrade advisory system.
     50   upgrade_notification_timer_.Start(
     51       FROM_HERE, base::TimeDelta::FromMilliseconds(kNotifyCycleTimeMs),
     52       this, &UpgradeDetectorChromeos::NotifyOnUpgrade);
     53 }
     54 
     55 void UpgradeDetectorChromeos::NotifyOnUpgrade() {
     56   base::TimeDelta delta = base::Time::Now() - upgrade_detected_time();
     57   int64 time_passed = delta.InDays();
     58 
     59   const int kSevereThreshold = 7;
     60   const int kHighThreshold = 4;
     61   const int kElevatedThreshold = 2;
     62   const int kLowThreshold = 0;
     63 
     64   // These if statements must be sorted (highest interval first).
     65   if (time_passed >= kSevereThreshold) {
     66     set_upgrade_notification_stage(UPGRADE_ANNOYANCE_SEVERE);
     67 
     68     // We can't get any higher, baby.
     69     upgrade_notification_timer_.Stop();
     70   } else if (time_passed >= kHighThreshold) {
     71     set_upgrade_notification_stage(UPGRADE_ANNOYANCE_HIGH);
     72   } else if (time_passed >= kElevatedThreshold) {
     73     set_upgrade_notification_stage(UPGRADE_ANNOYANCE_ELEVATED);
     74   } else if (time_passed >= kLowThreshold) {
     75     set_upgrade_notification_stage(UPGRADE_ANNOYANCE_LOW);
     76   } else {
     77     return;  // Not ready to recommend upgrade.
     78   }
     79 
     80   NotifyUpgradeRecommended();
     81 }
     82 
     83 // static
     84 UpgradeDetectorChromeos* UpgradeDetectorChromeos::GetInstance() {
     85   return Singleton<UpgradeDetectorChromeos>::get();
     86 }
     87 
     88 // static
     89 UpgradeDetector* UpgradeDetector::GetInstance() {
     90   return UpgradeDetectorChromeos::GetInstance();
     91 }
     92