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      1 // Copyright 2014 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/hotword_private/hotword_private_api.h"
      6 
      7 #include "base/lazy_instance.h"
      8 #include "base/prefs/pref_service.h"
      9 #include "chrome/browser/profiles/profile.h"
     10 #include "chrome/browser/search/hotword_client.h"
     11 #include "chrome/browser/search/hotword_service.h"
     12 #include "chrome/browser/search/hotword_service_factory.h"
     13 #include "chrome/common/pref_names.h"
     14 #include "extensions/browser/event_router.h"
     15 
     16 namespace extensions {
     17 
     18 namespace OnEnabledChanged =
     19     api::hotword_private::OnEnabledChanged;
     20 
     21 static base::LazyInstance<
     22     BrowserContextKeyedAPIFactory<HotwordPrivateEventService> > g_factory =
     23     LAZY_INSTANCE_INITIALIZER;
     24 
     25 HotwordPrivateEventService::HotwordPrivateEventService(
     26     content::BrowserContext* context)
     27     : profile_(Profile::FromBrowserContext(context)) {
     28   pref_change_registrar_.Init(profile_->GetPrefs());
     29   pref_change_registrar_.Add(
     30       prefs::kHotwordSearchEnabled,
     31       base::Bind(&HotwordPrivateEventService::OnEnabledChanged,
     32                  base::Unretained(this)));
     33 }
     34 
     35 HotwordPrivateEventService::~HotwordPrivateEventService() {
     36 }
     37 
     38 void HotwordPrivateEventService::Shutdown() {
     39 }
     40 
     41 // static
     42 BrowserContextKeyedAPIFactory<HotwordPrivateEventService>*
     43 HotwordPrivateEventService::GetFactoryInstance() {
     44   return g_factory.Pointer();
     45 }
     46 
     47 // static
     48 const char* HotwordPrivateEventService::service_name() {
     49   return "HotwordPrivateEventService";
     50 }
     51 
     52 void HotwordPrivateEventService::OnEnabledChanged(
     53     const std::string& pref_name) {
     54   DCHECK_EQ(pref_name, std::string(prefs::kHotwordSearchEnabled));
     55   SignalEvent(OnEnabledChanged::kEventName);
     56 }
     57 
     58 void HotwordPrivateEventService::OnHotwordSessionRequested() {
     59   SignalEvent(api::hotword_private::OnHotwordSessionRequested::kEventName);
     60 }
     61 
     62 void HotwordPrivateEventService::OnHotwordSessionStopped() {
     63   SignalEvent(api::hotword_private::OnHotwordSessionStopped::kEventName);
     64 }
     65 
     66 void HotwordPrivateEventService::SignalEvent(const std::string& event_name) {
     67   EventRouter* router = EventRouter::Get(profile_);
     68   if (!router || !router->HasEventListener(event_name))
     69     return;
     70   scoped_ptr<base::ListValue> args(new base::ListValue());
     71   scoped_ptr<Event> event(new Event(event_name, args.Pass()));
     72   router->BroadcastEvent(event.Pass());
     73 }
     74 
     75 bool HotwordPrivateSetEnabledFunction::RunSync() {
     76   scoped_ptr<api::hotword_private::SetEnabled::Params> params(
     77       api::hotword_private::SetEnabled::Params::Create(*args_));
     78   EXTENSION_FUNCTION_VALIDATE(params.get());
     79 
     80   PrefService* prefs = GetProfile()->GetPrefs();
     81   prefs->SetBoolean(prefs::kHotwordSearchEnabled, params->state);
     82   return true;
     83 }
     84 
     85 bool HotwordPrivateSetAudioLoggingEnabledFunction::RunSync() {
     86   scoped_ptr<api::hotword_private::SetEnabled::Params> params(
     87       api::hotword_private::SetEnabled::Params::Create(*args_));
     88   EXTENSION_FUNCTION_VALIDATE(params.get());
     89 
     90   PrefService* prefs = GetProfile()->GetPrefs();
     91   prefs->SetBoolean(prefs::kHotwordAudioLoggingEnabled, params->state);
     92   return true;
     93 }
     94 
     95 bool HotwordPrivateGetStatusFunction::RunSync() {
     96   api::hotword_private::StatusDetails result;
     97 
     98   HotwordService* hotword_service =
     99       HotwordServiceFactory::GetForProfile(GetProfile());
    100   if (!hotword_service)
    101     result.available = false;
    102   else
    103     result.available = hotword_service->IsServiceAvailable();
    104 
    105   PrefService* prefs = GetProfile()->GetPrefs();
    106   result.enabled_set = prefs->HasPrefPath(prefs::kHotwordSearchEnabled);
    107   result.enabled = prefs->GetBoolean(prefs::kHotwordSearchEnabled);
    108   result.audio_logging_enabled = false;
    109   if (hotword_service)
    110     result.audio_logging_enabled = hotword_service->IsOptedIntoAudioLogging();
    111 
    112   SetResult(result.ToValue().release());
    113   return true;
    114 }
    115 
    116 bool HotwordPrivateSetHotwordSessionStateFunction::RunSync() {
    117   scoped_ptr<api::hotword_private::SetHotwordSessionState::Params> params(
    118       api::hotword_private::SetHotwordSessionState::Params::Create(*args_));
    119   EXTENSION_FUNCTION_VALIDATE(params.get());
    120 
    121   HotwordService* hotword_service =
    122       HotwordServiceFactory::GetForProfile(GetProfile());
    123   if (hotword_service && hotword_service->client())
    124     hotword_service->client()->OnHotwordStateChanged(params->started);
    125   return true;
    126 }
    127 
    128 bool HotwordPrivateNotifyHotwordRecognitionFunction::RunSync() {
    129   HotwordService* hotword_service =
    130       HotwordServiceFactory::GetForProfile(GetProfile());
    131   if (hotword_service && hotword_service->client())
    132     hotword_service->client()->OnHotwordRecognized();
    133   return true;
    134 }
    135 
    136 }  // namespace extensions
    137