Reset Screen moved to ScreenContext.

chrome/browser/chromeos/login/screens/reset_screen.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright (c) 2014 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/chromeos/login/screens/reset_screen.h"
 
-#include "base/logging.h"
+#include "base/command_line.h"
+#include "base/metrics/histogram.h"
+#include "base/prefs/pref_registry_simple.h"
+#include "base/prefs/pref_service.h"
+#include "base/values.h"
+#include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/login/screens/base_screen_delegate.h"
-#include "chrome/browser/chromeos/login/wizard_controller.h"
+#include "chrome/browser/chromeos/login/screens/error_screen.h"
+#include "chrome/browser/chromeos/login/screens/network_error.h"
+#include "chrome/browser/chromeos/login/screens/reset_view.h"
+#include "chrome/browser/chromeos/login/ui/login_display_host_impl.h"
+#include "chrome/browser/chromeos/reset/metrics.h"
+#include "chrome/browser/ui/webui/chromeos/login/oobe_ui.h"
+#include "chrome/common/pref_names.h"
+#include "chromeos/chromeos_switches.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/power_manager_client.h"
+#include "chromeos/dbus/session_manager_client.h"
+
 
 namespace chromeos {
 
 ResetScreen::ResetScreen(BaseScreenDelegate* base_screen_delegate,
-                         ResetScreenActor* actor)
-    : BaseScreen(base_screen_delegate), actor_(actor) {
-  DCHECK(actor_);
-  if (actor_)
-    actor_->SetDelegate(this);
+                         ResetView* view)
+    : ResetModel(base_screen_delegate),
+      view_(view),
+      weak_ptr_factory_(this) {
+  DCHECK(view_);
+  if (view_)
+    view_->Bind(*this);
+  context_.SetInteger(kContextKeyScreenState, STATE_RESTART_REQUIRED);
+  context_.SetBoolean(kContextKeyIsRollbackAvailable, false);
+  context_.SetBoolean(kContextKeyIsRollbackChecked, false);
+  context_.SetBoolean(kContextKeyIsConfirmational, false);
+  context_.SetBoolean(kContextKeyIsOfficialBuild, false);
+#if defined(OFFICIAL_BUILD)
+  context_.SetBoolean(kContextKeyIsOfficialBuild, true);
+#endif
 }
 
 ResetScreen::~ResetScreen() {
-  if (actor_)
-    actor_->SetDelegate(NULL);
+  if (view_)
+    view_->Unbind();
+  DBusThreadManager::Get()->GetUpdateEngineClient()->RemoveObserver(this);
 }
 
 void ResetScreen::PrepareToShow() {
-  if (actor_)
-    actor_->PrepareToShow();
+  if (view_)
+    view_->PrepareToShow();
 }
 
 void ResetScreen::Show() {
-  if (actor_)
-    actor_->Show();
+  if (view_)
+    view_->Show();
+
+  int dialog_type = -1;  // used by UMA metrics.
+
+  ContextEditor context_editor = GetContextEditor();
+
+  bool restart_required = !base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kFirstExecAfterBoot);
+  if (restart_required) {
+    context_editor.SetInteger(kContextKeyScreenState, STATE_RESTART_REQUIRED);
+    dialog_type = reset::DIALOG_SHORTCUT_RESTART_REQUIRED;
+  } else {
+    context_editor.SetInteger(kContextKeyScreenState, STATE_POWERWASH_PROPOSAL);
+  }
+
+  // Set availability of Rollback feature.
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableRollbackOption)) {
+    context_editor.SetBoolean(kContextKeyIsRollbackAvailable, false);
+    dialog_type = reset::DIALOG_SHORTCUT_OFFERING_ROLLBACK_UNAVAILABLE;
+  } else {
+    chromeos::DBusThreadManager::Get()->GetUpdateEngineClient()->
+        CanRollbackCheck(base::Bind(&ResetScreen::OnRollbackCheck,
+        weak_ptr_factory_.GetWeakPtr()));
+  }
+
+  if (dialog_type >= 0) {
+    UMA_HISTOGRAM_ENUMERATION("Reset.ChromeOS.PowerwashDialogShown",
+                              dialog_type,
+                              reset::DIALOG_VIEW_TYPE_SIZE);
+  }
+
+  PrefService* prefs = g_browser_process->local_state();
+  prefs->SetBoolean(prefs::kFactoryResetRequested, false);
+  prefs->CommitPendingWrite();
 }
 
 void ResetScreen::Hide() {
-  if (actor_)
-    actor_->Hide();
-}
-
-std::string ResetScreen::GetName() const {
-  return WizardController::kResetScreenName;
-}
-
-void ResetScreen::OnExit() {
+  if (view_)
+    view_->Hide();
+}
+
+void ResetScreen::OnViewDestroyed(ResetView* view) {
+  if (view_ == view)
+    view_ = nullptr;
+}
+
+void ResetScreen::OnUserAction(const std::string& action_id) {
+  if (action_id == kUserActionCancelReset)
+    OnCancel();
+  else if (action_id == kUserActionResetRestartPressed)
+    OnRestart();
+  else if (action_id == kUserActionResetPowerwashPressed)
+    OnPowerwash();
+  else if (action_id == kUserActionResetLearnMorePressed)
+    OnLearnMore();
+  else if (action_id == kUserActionResetRollbackToggled)
+    OnToggleRollback();
+  else if (action_id == kUserActionResetShowConfirmationPressed)
+    OnShowConfirm();
+  else if (action_id == kUserActionResetResetConfirmationDismissed)
+    OnConfirmationDismissed();
+  else
+    BaseScreen::OnUserAction(action_id);
+}
+
+void ResetScreen::OnCancel() {
+  if (context_.GetInteger(
+      kContextKeyScreenState, STATE_RESTART_REQUIRED) == STATE_REVERT_PROMISE)
+    return;
+  // Hide Rollback view for the next show.
+  if (context_.GetBoolean(kContextKeyIsRollbackAvailable) &&
+      context_.GetBoolean(kContextKeyIsRollbackChecked))
+    OnToggleRollback();
   Finish(BaseScreenDelegate::RESET_CANCELED);
-}
-
-void ResetScreen::OnActorDestroyed(ResetScreenActor* actor) {
-  if (actor_ == actor)
-    actor_ = NULL;
+  DBusThreadManager::Get()->GetUpdateEngineClient()->RemoveObserver(this);
+}
+
+void ResetScreen::OnPowerwash() {
+  if (context_.GetInteger(kContextKeyScreenState, 0) !=
+      STATE_POWERWASH_PROPOSAL)
+    return;
+
+  GetContextEditor().SetBoolean(kContextKeyIsConfirmational, false);
+  CommitContextChanges();
+
+  if (context_.GetBoolean(kContextKeyIsRollbackAvailable) &&
+      context_.GetBoolean(kContextKeyIsRollbackChecked)) {
+    GetContextEditor().SetInteger(kContextKeyScreenState, STATE_REVERT_PROMISE);
+    DBusThreadManager::Get()->GetUpdateEngineClient()->AddObserver(this);
+    VLOG(1) << "Starting Rollback";
+    DBusThreadManager::Get()->GetUpdateEngineClient()->Rollback();
+  } else {
+    if (context_.GetBoolean(kContextKeyIsRollbackChecked) &&
+        !context_.GetBoolean(kContextKeyIsRollbackAvailable)) {
+      NOTREACHED() <<
+          "Rollback was checked but not available. Starting powerwash.";
+    }
+    VLOG(1) << "Starting Powerwash";
+    DBusThreadManager::Get()->GetSessionManagerClient()->StartDeviceWipe();
+  }
+}
+
+void ResetScreen::OnRestart() {
+  PrefService* prefs = g_browser_process->local_state();
+  prefs->SetBoolean(prefs::kFactoryResetRequested, true);
+  prefs->CommitPendingWrite();
+
+  chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->RequestRestart();
+}
+
+void ResetScreen::OnToggleRollback() {
+  // Hide Rollback if visible.
+  if (context_.GetBoolean(kContextKeyIsRollbackAvailable) &&
+      context_.GetBoolean(kContextKeyIsRollbackChecked)) {
+    VLOG(1) << "Hiding rollback view on reset screen";
+    GetContextEditor().SetBoolean(kContextKeyIsRollbackChecked, false);
+    return;
+  }
+
+  // Show Rollback if available.
+  VLOG(1) << "Requested rollback availability" <<
+             context_.GetBoolean(kContextKeyIsRollbackAvailable);
+  if (context_.GetBoolean(kContextKeyIsRollbackAvailable) &&
+      !context_.GetBoolean(kContextKeyIsRollbackChecked)) {
+    UMA_HISTOGRAM_ENUMERATION(
+        "Reset.ChromeOS.PowerwashDialogShown",
+        reset::DIALOG_SHORTCUT_OFFERING_ROLLBACK_AVAILABLE,
+        reset::DIALOG_VIEW_TYPE_SIZE);
+    GetContextEditor().SetBoolean(kContextKeyIsRollbackChecked, true);
+  }
+}
+
+void ResetScreen::OnShowConfirm() {
+  int dialog_type = context_.GetBoolean(kContextKeyIsRollbackChecked) ?
+      reset::DIALOG_SHORTCUT_CONFIRMING_POWERWASH_AND_ROLLBACK :
+      reset::DIALOG_SHORTCUT_CONFIRMING_POWERWASH_ONLY;
+  UMA_HISTOGRAM_ENUMERATION(
+      "Reset.ChromeOS.PowerwashDialogShown",
+      dialog_type,
+      reset::DIALOG_VIEW_TYPE_SIZE);
+
+  GetContextEditor().SetBoolean(kContextKeyIsConfirmational, true);
+}
+
+void ResetScreen::OnLearnMore() {
+#if defined(OFFICIAL_BUILD)
+  VLOG(1) << "Trying to view the help article about reset options.";
+  if (!help_app_.get()) {
+    help_app_ = new HelpAppLauncher(
+        LoginDisplayHostImpl::default_host()->GetNativeWindow());
+  }
+  help_app_->ShowHelpTopic(HelpAppLauncher::HELP_POWERWASH);
+#endif
+}
+
+void ResetScreen::OnConfirmationDismissed() {
+  GetContextEditor().SetBoolean(kContextKeyIsConfirmational, false);
+}
+
+void ResetScreen::UpdateStatusChanged(
+    const UpdateEngineClient::Status& status) {
+  VLOG(1) << "Update status change to " << status.status;
+  if (status.status == UpdateEngineClient::UPDATE_STATUS_ERROR ||
+      status.status ==
+          UpdateEngineClient::UPDATE_STATUS_REPORTING_ERROR_EVENT) {
+    GetContextEditor().SetInteger(kContextKeyScreenState, STATE_ERROR);
+    // Show error screen.
+    GetErrorScreen()->SetUIState(NetworkError::UI_STATE_ROLLBACK_ERROR);
+    get_base_screen_delegate()->ShowErrorScreen();
+  } else if (status.status ==
+      UpdateEngineClient::UPDATE_STATUS_UPDATED_NEED_REBOOT) {
+    DBusThreadManager::Get()->GetPowerManagerClient()->RequestRestart();
+  }
+}
+
+// Invoked from call to CanRollbackCheck upon completion of the DBus call.
+void ResetScreen::OnRollbackCheck(bool can_rollback) {
+  VLOG(1) << "Callback from CanRollbackCheck, result " << can_rollback;
+  int dialog_type = can_rollback ?
+      reset::DIALOG_SHORTCUT_OFFERING_ROLLBACK_AVAILABLE :
+      reset::DIALOG_SHORTCUT_OFFERING_ROLLBACK_UNAVAILABLE;
+  UMA_HISTOGRAM_ENUMERATION("Reset.ChromeOS.PowerwashDialogShown",
+                            dialog_type,
+                            reset::DIALOG_VIEW_TYPE_SIZE);
+
+  GetContextEditor().SetBoolean(kContextKeyIsRollbackAvailable, can_rollback);
+}
+
+ErrorScreen* ResetScreen::GetErrorScreen() {
+  return get_base_screen_delegate()->GetErrorScreen();
 }
 
 }  // namespace chromeos