MD Settings: Add Hotword (OK Google) section to search_page

chrome/browser/ui/webui/settings/search_engines_handler.cc

Index: chrome/browser/ui/webui/settings/search_engines_handler.cc
diff --git a/chrome/browser/ui/webui/settings/search_engines_handler.cc b/chrome/browser/ui/webui/settings/search_engines_handler.cc
index 9d20b307db1cf9b6e032bd125fd6f417fed18a9e..2b51d97cdb8b7fef14875397372c2cb71b3349ff 100644
--- a/chrome/browser/ui/webui/settings/search_engines_handler.cc
+++ b/chrome/browser/ui/webui/settings/search_engines_handler.cc
@@ -11,16 +11,25 @@
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/search/hotword_audio_history_handler.h"
+#include "chrome/browser/search/hotword_service.h"
+#include "chrome/browser/search/hotword_service_factory.h"
+#include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/browser/search_engines/ui_thread_search_terms_data.h"
+#include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/ui/search_engines/template_url_table_model.h"
+#include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_resources.h"
+#include "components/prefs/pref_service.h"
 #include "components/search_engines/template_url.h"
 #include "components/search_engines/template_url_service.h"
+#include "components/signin/core/browser/signin_manager.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_ui.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/extension.h"
+#include "ui/base/l10n/l10n_util.h"
 
 namespace {
 // The following strings need to match with the IDs of the paper-input elements
@@ -29,14 +38,43 @@ const char kSearchEngineField[] = "searchEngine";
 const char kKeywordField[] = "keyword";
 const char kQueryUrlField[] = "queryUrl";
 
+// Fields for hotwordUpdateInfo result.
+const char kHotwordSatusAllowed[] = "allowed";
+const char kHotwordSatusEnabled[] = "enabled";
+const char kHotwordStatusAlwaysOn[] = "alwaysOn";
+const char kHotwordSatusErrorMessage[] = "errorMessage";
+const char kHotwordSatusUserUserName[] = "userName";
+const char kHotwordSatusHistoryEnabled[] = "historyEnabled";
+
 // Dummy number used for indicating that a new search engine is added.
 const int kNewSearchEngineIndex = -1;
+
+bool IsGoogleDefaultSearch(Profile* profile) {
+  TemplateURLService* template_url_service =
+      TemplateURLServiceFactory::GetForProfile(profile);
+  if (!template_url_service)
+    return false;
+  const TemplateURL* url_template =
+      template_url_service->GetDefaultSearchProvider();
+  return url_template &&
+         url_template->url_ref().HasGoogleBaseURLs(
+             template_url_service->search_terms_data());
+}
+
+bool GetHotwordAlwaysOn(Profile* profile) {
+  SigninManagerBase* signin = SigninManagerFactory::GetForProfile(profile);
+  return signin && signin->IsAuthenticated() &&
+         HotwordServiceFactory::IsAlwaysOnAvailable();
+}
+
 }  // namespace
 
 namespace settings {
 
 SearchEnginesHandler::SearchEnginesHandler(Profile* profile)
-    : profile_(profile), list_controller_(profile) {}
+    : profile_(profile), list_controller_(profile), weak_ptr_factory_(this) {
+  pref_change_registrar_.Init(profile_->GetPrefs());
+}
 
 SearchEnginesHandler::~SearchEnginesHandler() {
   // TODO(tommycli): Refactor KeywordEditorController to be compatible with
@@ -73,20 +111,32 @@ void SearchEnginesHandler::RegisterMessages() {
       "searchEngineEditCompleted",
       base::Bind(&SearchEnginesHandler::HandleSearchEngineEditCompleted,
                  base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
+      "getHotwordInfo", base::Bind(&SearchEnginesHandler::HandleGetHotwordInfo,
+                                   base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
+      "setHotwordSearchEnabled",
+      base::Bind(&SearchEnginesHandler::HandleSetHotwordSearchEnabled,
+                 base::Unretained(this)));
 }
 
 void SearchEnginesHandler::OnJavascriptAllowed() {
   list_controller_.table_model()->SetObserver(this);
+  pref_change_registrar_.Add(prefs::kHotwordSearchEnabled,
+                             base::Bind(&SearchEnginesHandler::SendHotwordInfo,
+                                        base::Unretained(this)));
+  pref_change_registrar_.Add(prefs::kHotwordAlwaysOnSearchEnabled,
+                             base::Bind(&SearchEnginesHandler::SendHotwordInfo,
+                                        base::Unretained(this)));
 }
 
 void SearchEnginesHandler::OnJavascriptDisallowed() {
   list_controller_.table_model()->SetObserver(nullptr);
+  pref_change_registrar_.RemoveAll();
 }
 
 std::unique_ptr<base::DictionaryValue>
 SearchEnginesHandler::GetSearchEnginesList() {
-  AllowJavascript();
-
   // Find the default engine.
   const TemplateURL* default_engine =
       list_controller_.GetDefaultSearchProvider();
@@ -130,6 +180,7 @@ SearchEnginesHandler::GetSearchEnginesList() {
 }
 
 void SearchEnginesHandler::OnModelChanged() {
+  AllowJavascript();
   CallJavascriptFunction("cr.webUIListenerCallback",
                          base::StringValue("search-engines-changed"),
                          *GetSearchEnginesList());
@@ -200,6 +251,7 @@ void SearchEnginesHandler::HandleGetSearchEnginesList(
   CHECK_EQ(1U, args->GetSize());
   const base::Value* callback_id;
   CHECK(args->Get(0, &callback_id));
+  AllowJavascript();
   ResolveJavascriptCallback(*callback_id, *GetSearchEnginesList());
 }
 
@@ -215,6 +267,18 @@ void SearchEnginesHandler::HandleSetDefaultSearchEngine(
 
   list_controller_.MakeDefaultTemplateURL(index);
 
+  // If the new search engine is not Google, disable hotword search.
+  // TODO(stevenjb): Investigate migrating this logic to
+  // MakeDefaultTemplateURL.
+  if (!IsGoogleDefaultSearch(profile_)) {
+    HotwordService* hotword_service =
+        HotwordServiceFactory::GetForProfile(profile_);
+    if (hotword_service)
+      hotword_service->DisableHotwordPreferences();
+  }
+  // Hotword status may have changed.
+  SendHotwordInfo();
+
   content::RecordAction(
       base::UserMetricsAction("Options_SearchEngineSetDefault"));
 }
@@ -331,4 +395,139 @@ void SearchEnginesHandler::HandleSearchEngineEditCompleted(
   }
 }
 
+void SearchEnginesHandler::HandleGetHotwordInfo(const base::ListValue* args) {
+  AllowJavascript();
+
+  std::unique_ptr<base::Value> callback_id;
+  if (args) {
+    CHECK_EQ(1U, args->GetSize());
+    const base::Value* id;
+    CHECK(args->Get(0, &id));
+    callback_id = id->CreateDeepCopy();
+  }
+
+  std::unique_ptr<base::DictionaryValue> status = GetHotwordInfo();
+  bool enabled = false;
+  status->GetBoolean(kHotwordSatusEnabled, &enabled);
+  bool always_on = false;
+  status->GetBoolean(kHotwordStatusAlwaysOn, &always_on);
+  if (!enabled || !always_on) {
+    HotwordInfoComplete(callback_id.get(), *status);
+    return;
+  }
+
+  // OnGetHotwordAudioHistoryEnabled will call HotwordInfoComplete().
+  HotwordServiceFactory::GetForProfile(profile_)
+      ->GetAudioHistoryHandler()
+      ->GetAudioHistoryEnabled(
+          base::Bind(&SearchEnginesHandler::OnGetHotwordAudioHistoryEnabled,
+                     weak_ptr_factory_.GetWeakPtr(), base::Passed(&callback_id),
+                     base::Passed(&status)));
+}
+
+std::unique_ptr<base::DictionaryValue> SearchEnginesHandler::GetHotwordInfo() {
+  auto status = base::MakeUnique<base::DictionaryValue>();
+  if (!IsGoogleDefaultSearch(profile_)) {
+    status->SetBoolean(kHotwordSatusAllowed, false);
+    return status;
+  }
+
+  status->SetBoolean(kHotwordSatusAllowed,
+                     HotwordServiceFactory::IsHotwordAllowed(profile_));
+
+  HotwordServiceFactory::IsServiceAvailable(profile_);  // Update error value.
+  int hotword_error = HotwordServiceFactory::GetCurrentError(profile_);
+  if (hotword_error) {
+    base::string16 hotword_error_message;
+    if (hotword_error != IDS_HOTWORD_GENERIC_ERROR_MESSAGE) {
+      hotword_error_message = l10n_util::GetStringUTF16(hotword_error);
+    } else {
+      hotword_error_message = l10n_util::GetStringFUTF16(
+          hotword_error, base::ASCIIToUTF16(chrome::kHotwordLearnMoreURL));
+    }
+    status->SetString(kHotwordSatusErrorMessage, hotword_error_message);
+  }
+
+  if (!HotwordServiceFactory::GetForProfile(profile_)) {
+    status->SetBoolean(kHotwordSatusEnabled, false);
+    return status;
+  }
+
+  bool always_on = GetHotwordAlwaysOn(profile_);
+  status->SetBoolean(kHotwordStatusAlwaysOn, always_on);
+
+  std::string pref_name = always_on ? prefs::kHotwordAlwaysOnSearchEnabled
+                                    : prefs::kHotwordSearchEnabled;
+  bool enabled = profile_->GetPrefs()->GetBoolean(pref_name);
+  status->SetBoolean(kHotwordSatusEnabled, enabled);
+  if (!enabled)
+    return status;
+
+  SigninManagerBase* signin = SigninManagerFactory::GetForProfile(profile_);
+  std::string user_display_name =
+      signin ? signin->GetAuthenticatedAccountInfo().email : "";
+  status->SetString(kHotwordSatusUserUserName, user_display_name);
+  return status;
+}
+
+void SearchEnginesHandler::OnGetHotwordAudioHistoryEnabled(
+    std::unique_ptr<base::Value> callback_id,
+    std::unique_ptr<base::DictionaryValue> status,
+    bool success,
+    bool logging_enabled) {
+  if (success)
+    status->SetBoolean(kHotwordSatusHistoryEnabled, logging_enabled);
+  HotwordInfoComplete(callback_id.get(), *status);
+}
+
+void SearchEnginesHandler::HotwordInfoComplete(
+    const base::Value* callback_id,
+    const base::DictionaryValue& status) {
+  if (callback_id) {
+    ResolveJavascriptCallback(*callback_id, status);
+  } else {
+    CallJavascriptFunction("cr.webUIListenerCallback",
+                           base::StringValue("hotword-info-update"), status);
+  }
+}
+
+void SearchEnginesHandler::SendHotwordInfo() {
+  HandleGetHotwordInfo(nullptr);
+}
+
+void SearchEnginesHandler::HandleSetHotwordSearchEnabled(
+    const base::ListValue* args) {
+  CHECK_EQ(1U, args->GetSize());
+  bool enabled;
+  CHECK(args->GetBoolean(0, &enabled));
+
+  bool always_on = GetHotwordAlwaysOn(profile_);
+  if (!always_on) {
+    profile_->GetPrefs()->SetBoolean(prefs::kHotwordSearchEnabled, enabled);
+    return;
+  }
+
+  HotwordService* hotword_service =
+      HotwordServiceFactory::GetForProfile(profile_);
+  if (!enabled || !hotword_service) {
+    profile_->GetPrefs()->SetBoolean(prefs::kHotwordAlwaysOnSearchEnabled,
+                                     false);
+    return;
+  }
+
+  bool was_enabled =
+      profile_->GetPrefs()->GetBoolean(prefs::kHotwordAlwaysOnSearchEnabled);
+  HotwordService::LaunchMode launch_mode;
+  if (was_enabled) {
+    launch_mode = HotwordService::RETRAIN;
+  } else {
+    bool logging_enabled =
+        profile_->GetPrefs()->GetBoolean(prefs::kHotwordAudioLoggingEnabled);
+    launch_mode = logging_enabled ? HotwordService::HOTWORD_ONLY
+                                  : HotwordService::HOTWORD_AND_AUDIO_HISTORY;
+  }
+  hotword_service->OptIntoHotwording(launch_mode);
+  SendHotwordInfo();
+}
+
 }  // namespace settings