components/web_resource/eula_accepted_notifier.cc

   1 // Copyright 2013 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 "components/web_resource/eula_accepted_notifier.h"
   6
   7 #include "base/bind.h"
   8 #include "base/logging.h"
   9 #include "base/prefs/pref_service.h"
  10 #include "components/web_resource/web_resource_pref_names.h"
  11
  12 namespace web_resource {
  13
  14 EulaAcceptedNotifier::EulaAcceptedNotifier(PrefService* local_state)
  15     : local_state_(local_state), observer_(nullptr) {
  16 }
  17
  18 EulaAcceptedNotifier::~EulaAcceptedNotifier() {
  19 }
  20
  21 void EulaAcceptedNotifier::Init(Observer* observer) {
  22   DCHECK(!observer_ && observer);
  23   observer_ = observer;
  24 }
  25
  26 bool EulaAcceptedNotifier::IsEulaAccepted() {
  27   if (local_state_->GetBoolean(prefs::kEulaAccepted))
  28     return true;
  29
  30   // Register for the notification, if this is the first time.
  31   if (registrar_.IsEmpty()) {
  32     registrar_.Init(local_state_);
  33     registrar_.Add(prefs::kEulaAccepted,
  34                    base::Bind(&EulaAcceptedNotifier::OnPrefChanged,
  35                               base::Unretained(this)));
  36   }
  37   return false;
  38 }
  39
  40 // static
  41 EulaAcceptedNotifier* EulaAcceptedNotifier::Create(PrefService* local_state) {
  42 // First run EULA only exists on ChromeOS, Android and iOS. On ChromeOS, it is
  43 // only shown in official builds.
  44 #if (defined(OS_CHROMEOS) && defined(GOOGLE_CHROME_BUILD)) || \
  45     defined(OS_ANDROID) || defined(OS_IOS)
  46   // Tests that use higher-level classes that use EulaAcceptNotifier may not
  47   // have local state or may not register this pref. Return null to indicate not
  48   // needing to check the EULA.
  49   if (!local_state || !local_state->FindPreference(prefs::kEulaAccepted))
  50     return nullptr;
  51   return new EulaAcceptedNotifier(local_state);
  52 #else
  53   return nullptr;
  54 #endif
  55 }
  56
  57 void EulaAcceptedNotifier::NotifyObserver() {
  58   observer_->OnEulaAccepted();
  59 }
  60
  61 void EulaAcceptedNotifier::OnPrefChanged() {
  62   DCHECK(!registrar_.IsEmpty());
  63   registrar_.RemoveAll();
  64
  65   DCHECK(local_state_->GetBoolean(prefs::kEulaAccepted));
  66   observer_->OnEulaAccepted();
  67 }
  68
  69 }  // namespace web_resource