desktop_notification_service.cc revision 116680a4aac90f2aa7413d9095a592090648e557 
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/notifications/desktop_notification_service.h"
6
7#include "base/bind.h"
8#include "base/metrics/histogram.h"
9#include "base/prefs/scoped_user_pref_update.h"
10#include "base/strings/utf_string_conversions.h"
11#include "base/threading/thread.h"
12#include "chrome/browser/browser_process.h"
13#include "chrome/browser/chrome_notification_types.h"
14#include "chrome/browser/content_settings/content_settings_details.h"
15#include "chrome/browser/content_settings/content_settings_provider.h"
16#include "chrome/browser/content_settings/host_content_settings_map.h"
17#include "chrome/browser/infobars/infobar_service.h"
18#include "chrome/browser/notifications/desktop_notification_service_factory.h"
19#include "chrome/browser/notifications/notification.h"
20#include "chrome/browser/notifications/notification_object_proxy.h"
21#include "chrome/browser/notifications/notification_ui_manager.h"
22#include "chrome/browser/notifications/sync_notifier/chrome_notifier_service.h"
23#include "chrome/browser/notifications/sync_notifier/chrome_notifier_service_factory.h"
24#include "chrome/browser/profiles/profile.h"
25#include "chrome/browser/ui/browser.h"
26#include "chrome/browser/ui/website_settings/permission_bubble_manager.h"
27#include "chrome/browser/ui/website_settings/permission_bubble_request.h"
28#include "chrome/common/content_settings.h"
29#include "chrome/common/content_settings_pattern.h"
30#include "chrome/common/pref_names.h"
31#include "chrome/common/url_constants.h"
32#include "components/infobars/core/confirm_infobar_delegate.h"
33#include "components/infobars/core/infobar.h"
34#include "components/pref_registry/pref_registry_syncable.h"
35#include "content/public/browser/browser_thread.h"
36#include "content/public/browser/notification_service.h"
37#include "content/public/browser/render_frame_host.h"
38#include "content/public/browser/render_process_host.h"
39#include "content/public/browser/render_view_host.h"
40#include "content/public/browser/web_contents.h"
41#include "content/public/common/show_desktop_notification_params.h"
42#include "grit/browser_resources.h"
43#include "grit/chromium_strings.h"
44#include "grit/generated_resources.h"
45#include "grit/theme_resources.h"
46#include "net/base/escape.h"
47#include "ui/base/l10n/l10n_util.h"
48#include "ui/base/resource/resource_bundle.h"
49#include "ui/base/webui/web_ui_util.h"
50#include "ui/message_center/notifier_settings.h"
51
52#if defined(ENABLE_EXTENSIONS)
53#include "chrome/browser/extensions/api/notifications/notifications_api.h"
54#include "chrome/browser/extensions/extension_service.h"
55#include "extensions/browser/event_router.h"
56#include "extensions/browser/extension_system.h"
57#include "extensions/browser/extension_util.h"
58#include "extensions/browser/info_map.h"
59#include "extensions/common/constants.h"
60#include "extensions/common/extension.h"
61#include "extensions/common/extension_set.h"
62#endif
63
64using blink::WebTextDirection;
65using content::BrowserThread;
66using content::RenderViewHost;
67using content::WebContents;
68using message_center::NotifierId;
69
70namespace {
71
72const char kChromeNowExtensionID[] = "pafkbggdmjlpgkdkcbjmhmfcdpncadgh";
73
74// NotificationPermissionRequest ---------------------------------------
75
76class NotificationPermissionRequest : public PermissionBubbleRequest {
77 public:
78  NotificationPermissionRequest(
79      DesktopNotificationService* notification_service,
80      const GURL& origin,
81      base::string16 display_name,
82      const base::Closure& callback);
83  virtual ~NotificationPermissionRequest();
84
85  // PermissionBubbleDelegate:
86  virtual int GetIconID() const OVERRIDE;
87  virtual base::string16 GetMessageText() const OVERRIDE;
88  virtual base::string16 GetMessageTextFragment() const OVERRIDE;
89  virtual bool HasUserGesture() const OVERRIDE;
90  virtual GURL GetRequestingHostname() const OVERRIDE;
91  virtual void PermissionGranted() OVERRIDE;
92  virtual void PermissionDenied() OVERRIDE;
93  virtual void Cancelled() OVERRIDE;
94  virtual void RequestFinished() OVERRIDE;
95
96 private:
97  // The notification service to be used.
98  DesktopNotificationService* notification_service_;
99
100  // The origin we are asking for permissions on.
101  GURL origin_;
102
103  // The display name for the origin to be displayed.  Will be different from
104  // origin_ for extensions.
105  base::string16 display_name_;
106
107  // The callback information that tells us how to respond to javascript.
108  base::Closure callback_;
109
110  // Whether the user clicked one of the buttons.
111  bool action_taken_;
112
113  DISALLOW_COPY_AND_ASSIGN(NotificationPermissionRequest);
114};
115
116NotificationPermissionRequest::NotificationPermissionRequest(
117    DesktopNotificationService* notification_service,
118    const GURL& origin,
119    base::string16 display_name,
120    const base::Closure& callback)
121    : notification_service_(notification_service),
122      origin_(origin),
123      display_name_(display_name),
124      callback_(callback),
125      action_taken_(false) {}
126
127NotificationPermissionRequest::~NotificationPermissionRequest() {}
128
129int NotificationPermissionRequest::GetIconID() const {
130  return IDR_INFOBAR_DESKTOP_NOTIFICATIONS;
131}
132
133base::string16 NotificationPermissionRequest::GetMessageText() const {
134  return l10n_util::GetStringFUTF16(IDS_NOTIFICATION_PERMISSIONS,
135                                    display_name_);
136}
137
138base::string16
139NotificationPermissionRequest::GetMessageTextFragment() const {
140  return l10n_util::GetStringUTF16(IDS_NOTIFICATION_PERMISSIONS_FRAGMENT);
141}
142
143bool NotificationPermissionRequest::HasUserGesture() const {
144  // Currently notification permission requests are only issued on
145  // user gesture.
146  return true;
147}
148
149GURL NotificationPermissionRequest::GetRequestingHostname() const {
150  return origin_;
151}
152
153void NotificationPermissionRequest::PermissionGranted() {
154  action_taken_ = true;
155  UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Allowed", 1);
156  notification_service_->GrantPermission(origin_);
157}
158
159void NotificationPermissionRequest::PermissionDenied() {
160  action_taken_ = true;
161  UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Denied", 1);
162  notification_service_->DenyPermission(origin_);
163}
164
165void NotificationPermissionRequest::Cancelled() {
166}
167
168void NotificationPermissionRequest::RequestFinished() {
169  if (!action_taken_)
170    UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Ignored", 1);
171
172  callback_.Run();
173
174  delete this;
175}
176
177
178// NotificationPermissionInfoBarDelegate --------------------------------------
179
180// The delegate for the infobar shown when an origin requests notification
181// permissions.
182class NotificationPermissionInfoBarDelegate : public ConfirmInfoBarDelegate {
183 public:
184  // Creates a notification permission infobar and delegate and adds the infobar
185  // to |infobar_service|.
186  static void Create(InfoBarService* infobar_service,
187                     DesktopNotificationService* notification_service,
188                     const GURL& origin,
189                     const base::string16& display_name,
190                     const base::Closure& callback);
191
192 private:
193  NotificationPermissionInfoBarDelegate(
194      DesktopNotificationService* notification_service,
195      const GURL& origin,
196      const base::string16& display_name,
197      const base::Closure& callback);
198  virtual ~NotificationPermissionInfoBarDelegate();
199
200  // ConfirmInfoBarDelegate:
201  virtual int GetIconID() const OVERRIDE;
202  virtual Type GetInfoBarType() const OVERRIDE;
203  virtual base::string16 GetMessageText() const OVERRIDE;
204  virtual base::string16 GetButtonLabel(InfoBarButton button) const OVERRIDE;
205  virtual bool Accept() OVERRIDE;
206  virtual bool Cancel() OVERRIDE;
207
208  // The origin we are asking for permissions on.
209  GURL origin_;
210
211  // The display name for the origin to be displayed.  Will be different from
212  // origin_ for extensions.
213  base::string16 display_name_;
214
215  // The notification service to be used.
216  DesktopNotificationService* notification_service_;
217
218  // The callback information that tells us how to respond to javascript.
219  base::Closure callback_;
220
221  // Whether the user clicked one of the buttons.
222  bool action_taken_;
223
224  DISALLOW_COPY_AND_ASSIGN(NotificationPermissionInfoBarDelegate);
225};
226
227// static
228void NotificationPermissionInfoBarDelegate::Create(
229    InfoBarService* infobar_service,
230    DesktopNotificationService* notification_service,
231    const GURL& origin,
232    const base::string16& display_name,
233    const base::Closure& callback) {
234  infobar_service->AddInfoBar(ConfirmInfoBarDelegate::CreateInfoBar(
235      scoped_ptr<ConfirmInfoBarDelegate>(
236          new NotificationPermissionInfoBarDelegate(
237              notification_service, origin, display_name, callback))));
238}
239
240NotificationPermissionInfoBarDelegate::NotificationPermissionInfoBarDelegate(
241    DesktopNotificationService* notification_service,
242    const GURL& origin,
243    const base::string16& display_name,
244    const base::Closure& callback)
245    : ConfirmInfoBarDelegate(),
246      origin_(origin),
247      display_name_(display_name),
248      notification_service_(notification_service),
249      callback_(callback),
250      action_taken_(false) {
251}
252
253NotificationPermissionInfoBarDelegate::
254    ~NotificationPermissionInfoBarDelegate() {
255  if (!action_taken_)
256    UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Ignored", 1);
257
258  callback_.Run();
259}
260
261int NotificationPermissionInfoBarDelegate::GetIconID() const {
262  return IDR_INFOBAR_DESKTOP_NOTIFICATIONS;
263}
264
265infobars::InfoBarDelegate::Type
266NotificationPermissionInfoBarDelegate::GetInfoBarType() const {
267  return PAGE_ACTION_TYPE;
268}
269
270base::string16 NotificationPermissionInfoBarDelegate::GetMessageText() const {
271  return l10n_util::GetStringFUTF16(IDS_NOTIFICATION_PERMISSIONS,
272                                    display_name_);
273}
274
275base::string16 NotificationPermissionInfoBarDelegate::GetButtonLabel(
276    InfoBarButton button) const {
277  return l10n_util::GetStringUTF16((button == BUTTON_OK) ?
278      IDS_NOTIFICATION_PERMISSION_YES : IDS_NOTIFICATION_PERMISSION_NO);
279}
280
281bool NotificationPermissionInfoBarDelegate::Accept() {
282  UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Allowed", 1);
283  notification_service_->GrantPermission(origin_);
284  action_taken_ = true;
285  return true;
286}
287
288bool NotificationPermissionInfoBarDelegate::Cancel() {
289  UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Denied", 1);
290  notification_service_->DenyPermission(origin_);
291  action_taken_ = true;
292  return true;
293}
294
295void CancelNotification(const std::string& id) {
296  g_browser_process->notification_ui_manager()->CancelById(id);
297}
298
299}  // namespace
300
301
302// DesktopNotificationService -------------------------------------------------
303
304// static
305void DesktopNotificationService::RegisterProfilePrefs(
306    user_prefs::PrefRegistrySyncable* registry) {
307  registry->RegisterListPref(
308      prefs::kMessageCenterDisabledExtensionIds,
309      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
310  registry->RegisterListPref(
311      prefs::kMessageCenterDisabledSystemComponentIds,
312      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
313  ExtensionWelcomeNotification::RegisterProfilePrefs(registry);
314}
315
316// static
317base::string16 DesktopNotificationService::CreateDataUrl(
318    const GURL& icon_url,
319    const base::string16& title,
320    const base::string16& body,
321    WebTextDirection dir) {
322  int resource;
323  std::vector<std::string> subst;
324  if (icon_url.is_valid()) {
325    resource = IDR_NOTIFICATION_ICON_HTML;
326    subst.push_back(icon_url.spec());
327    subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(title)));
328    subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(body)));
329    // icon float position
330    subst.push_back(dir == blink::WebTextDirectionRightToLeft ?
331                    "right" : "left");
332  } else if (title.empty() || body.empty()) {
333    resource = IDR_NOTIFICATION_1LINE_HTML;
334    base::string16 line = title.empty() ? body : title;
335    // Strings are div names in the template file.
336    base::string16 line_name =
337        title.empty() ? base::ASCIIToUTF16("description")
338                      : base::ASCIIToUTF16("title");
339    subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(line_name)));
340    subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(line)));
341  } else {
342    resource = IDR_NOTIFICATION_2LINE_HTML;
343    subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(title)));
344    subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(body)));
345  }
346  // body text direction
347  subst.push_back(dir == blink::WebTextDirectionRightToLeft ?
348                  "rtl" : "ltr");
349
350  return CreateDataUrl(resource, subst);
351}
352
353// static
354base::string16 DesktopNotificationService::CreateDataUrl(
355    int resource, const std::vector<std::string>& subst) {
356  const base::StringPiece template_html(
357      ResourceBundle::GetSharedInstance().GetRawDataResource(
358          resource));
359
360  if (template_html.empty()) {
361    NOTREACHED() << "unable to load template. ID: " << resource;
362    return base::string16();
363  }
364
365  std::string data = ReplaceStringPlaceholders(template_html, subst, NULL);
366  return base::UTF8ToUTF16("data:text/html;charset=utf-8," +
367                               net::EscapeQueryParamValue(data, false));
368}
369
370// static
371std::string DesktopNotificationService::AddIconNotification(
372    const GURL& origin_url,
373    const base::string16& title,
374    const base::string16& message,
375    const gfx::Image& icon,
376    const base::string16& replace_id,
377    NotificationDelegate* delegate,
378    Profile* profile) {
379  Notification notification(origin_url, icon, title, message,
380                            blink::WebTextDirectionDefault,
381                            base::string16(), replace_id, delegate);
382  g_browser_process->notification_ui_manager()->Add(notification, profile);
383  return notification.delegate_id();
384}
385
386DesktopNotificationService::DesktopNotificationService(
387    Profile* profile,
388    NotificationUIManager* ui_manager)
389    : profile_(profile),
390      ui_manager_(ui_manager) {
391  OnStringListPrefChanged(
392      prefs::kMessageCenterDisabledExtensionIds, &disabled_extension_ids_);
393  OnStringListPrefChanged(
394      prefs::kMessageCenterDisabledSystemComponentIds,
395      &disabled_system_component_ids_);
396  disabled_extension_id_pref_.Init(
397      prefs::kMessageCenterDisabledExtensionIds,
398      profile_->GetPrefs(),
399      base::Bind(
400          &DesktopNotificationService::OnStringListPrefChanged,
401          base::Unretained(this),
402          base::Unretained(prefs::kMessageCenterDisabledExtensionIds),
403          base::Unretained(&disabled_extension_ids_)));
404  disabled_system_component_id_pref_.Init(
405      prefs::kMessageCenterDisabledSystemComponentIds,
406      profile_->GetPrefs(),
407      base::Bind(
408          &DesktopNotificationService::OnStringListPrefChanged,
409          base::Unretained(this),
410          base::Unretained(prefs::kMessageCenterDisabledSystemComponentIds),
411          base::Unretained(&disabled_system_component_ids_)));
412  registrar_.Add(this,
413                 chrome::NOTIFICATION_EXTENSION_UNINSTALLED_DEPRECATED,
414                 content::Source<Profile>(profile_));
415}
416
417DesktopNotificationService::~DesktopNotificationService() {
418}
419
420void DesktopNotificationService::GrantPermission(const GURL& origin) {
421  ContentSettingsPattern primary_pattern =
422      ContentSettingsPattern::FromURLNoWildcard(origin);
423  profile_->GetHostContentSettingsMap()->SetContentSetting(
424      primary_pattern,
425      ContentSettingsPattern::Wildcard(),
426      CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
427      NO_RESOURCE_IDENTIFIER,
428      CONTENT_SETTING_ALLOW);
429}
430
431void DesktopNotificationService::DenyPermission(const GURL& origin) {
432  ContentSettingsPattern primary_pattern =
433      ContentSettingsPattern::FromURLNoWildcard(origin);
434  profile_->GetHostContentSettingsMap()->SetContentSetting(
435      primary_pattern,
436      ContentSettingsPattern::Wildcard(),
437      CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
438      NO_RESOURCE_IDENTIFIER,
439      CONTENT_SETTING_BLOCK);
440}
441
442ContentSetting DesktopNotificationService::GetDefaultContentSetting(
443    std::string* provider_id) {
444  return profile_->GetHostContentSettingsMap()->GetDefaultContentSetting(
445      CONTENT_SETTINGS_TYPE_NOTIFICATIONS, provider_id);
446}
447
448void DesktopNotificationService::SetDefaultContentSetting(
449    ContentSetting setting) {
450  profile_->GetHostContentSettingsMap()->SetDefaultContentSetting(
451      CONTENT_SETTINGS_TYPE_NOTIFICATIONS, setting);
452}
453
454void DesktopNotificationService::ResetToDefaultContentSetting() {
455  profile_->GetHostContentSettingsMap()->SetDefaultContentSetting(
456      CONTENT_SETTINGS_TYPE_NOTIFICATIONS, CONTENT_SETTING_DEFAULT);
457}
458
459void DesktopNotificationService::GetNotificationsSettings(
460    ContentSettingsForOneType* settings) {
461  profile_->GetHostContentSettingsMap()->GetSettingsForOneType(
462      CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
463      NO_RESOURCE_IDENTIFIER,
464      settings);
465}
466
467void DesktopNotificationService::ClearSetting(
468    const ContentSettingsPattern& pattern) {
469  profile_->GetHostContentSettingsMap()->SetContentSetting(
470      pattern,
471      ContentSettingsPattern::Wildcard(),
472      CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
473      NO_RESOURCE_IDENTIFIER,
474      CONTENT_SETTING_DEFAULT);
475}
476
477void DesktopNotificationService::ResetAllOrigins() {
478  profile_->GetHostContentSettingsMap()->ClearSettingsForOneType(
479      CONTENT_SETTINGS_TYPE_NOTIFICATIONS);
480}
481
482ContentSetting DesktopNotificationService::GetContentSetting(
483    const GURL& origin) {
484  return profile_->GetHostContentSettingsMap()
485      ->GetContentSettingAndMaybeUpdateLastUsage(
486          origin,
487          origin,
488          CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
489          NO_RESOURCE_IDENTIFIER);
490}
491
492void DesktopNotificationService::RequestPermission(
493    const GURL& origin,
494    content::RenderFrameHost* render_frame_host,
495    const base::Closure& callback) {
496  // If |origin| hasn't been seen before and the default content setting for
497  // notifications is "ask", show an infobar.
498  // The cache can only answer queries on the IO thread once it's initialized,
499  // so don't ask the cache.
500  WebContents* web_contents = WebContents::FromRenderFrameHost(
501      render_frame_host);
502  ContentSetting setting = GetContentSetting(origin);
503  if (setting == CONTENT_SETTING_ASK) {
504    if (PermissionBubbleManager::Enabled()) {
505      PermissionBubbleManager* bubble_manager =
506          PermissionBubbleManager::FromWebContents(web_contents);
507      if (bubble_manager) {
508        bubble_manager->AddRequest(new NotificationPermissionRequest(
509            this,
510            origin,
511            DisplayNameForOriginInProcessId(
512                origin, render_frame_host->GetProcess()->GetID()),
513            callback));
514      }
515      return;
516    }
517
518    // Show an info bar requesting permission.
519    InfoBarService* infobar_service =
520        InfoBarService::FromWebContents(web_contents);
521    // |infobar_service| may be NULL, e.g., if this request originated in a
522    // browser action popup, extension background page, or any HTML that runs
523    // outside of a tab.
524    if (infobar_service) {
525      NotificationPermissionInfoBarDelegate::Create(
526          infobar_service, this, origin,
527          DisplayNameForOriginInProcessId(
528              origin, render_frame_host->GetProcess()->GetID()),
529          callback);
530      return;
531    }
532  }
533
534  // Notify renderer immediately.
535  callback.Run();
536}
537
538void DesktopNotificationService::ShowDesktopNotification(
539    const content::ShowDesktopNotificationHostMsgParams& params,
540    content::RenderFrameHost* render_frame_host,
541    content::DesktopNotificationDelegate* delegate,
542    base::Closure* cancel_callback) {
543  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
544  const GURL& origin = params.origin;
545  NotificationObjectProxy* proxy =
546      new NotificationObjectProxy(render_frame_host, delegate);
547
548  base::string16 display_source = DisplayNameForOriginInProcessId(
549      origin, render_frame_host->GetProcess()->GetID());
550  Notification notification(origin, params.icon_url, params.title,
551      params.body, params.direction, display_source, params.replace_id,
552      proxy);
553
554  // The webkit notification doesn't timeout.
555  notification.set_never_timeout(true);
556
557  GetUIManager()->Add(notification, profile_);
558  if (cancel_callback)
559    *cancel_callback = base::Bind(&CancelNotification, proxy->id());
560}
561
562base::string16 DesktopNotificationService::DisplayNameForOriginInProcessId(
563    const GURL& origin, int process_id) {
564#if defined(ENABLE_EXTENSIONS)
565  // If the source is an extension, lookup the display name.
566  if (origin.SchemeIs(extensions::kExtensionScheme)) {
567    extensions::InfoMap* extension_info_map =
568        extensions::ExtensionSystem::Get(profile_)->info_map();
569    if (extension_info_map) {
570      extensions::ExtensionSet extensions;
571      extension_info_map->GetExtensionsWithAPIPermissionForSecurityOrigin(
572          origin, process_id, extensions::APIPermission::kNotification,
573          &extensions);
574      for (extensions::ExtensionSet::const_iterator iter = extensions.begin();
575           iter != extensions.end(); ++iter) {
576        NotifierId notifier_id(NotifierId::APPLICATION, (*iter)->id());
577        if (IsNotifierEnabled(notifier_id))
578          return base::UTF8ToUTF16((*iter)->name());
579      }
580    }
581  }
582#endif
583
584  return base::UTF8ToUTF16(origin.host());
585}
586
587void DesktopNotificationService::NotifySettingsChange() {
588  content::NotificationService::current()->Notify(
589      chrome::NOTIFICATION_DESKTOP_NOTIFICATION_SETTINGS_CHANGED,
590      content::Source<DesktopNotificationService>(this),
591      content::NotificationService::NoDetails());
592}
593
594NotificationUIManager* DesktopNotificationService::GetUIManager() {
595  // We defer setting ui_manager_ to the global singleton until we need it
596  // in order to avoid UI dependent construction during startup.
597  if (!ui_manager_)
598    ui_manager_ = g_browser_process->notification_ui_manager();
599  return ui_manager_;
600}
601
602bool DesktopNotificationService::IsNotifierEnabled(
603    const NotifierId& notifier_id) {
604  switch (notifier_id.type) {
605    case NotifierId::APPLICATION:
606      return disabled_extension_ids_.find(notifier_id.id) ==
607          disabled_extension_ids_.end();
608    case NotifierId::WEB_PAGE:
609      return GetContentSetting(notifier_id.url) == CONTENT_SETTING_ALLOW;
610    case NotifierId::SYSTEM_COMPONENT:
611#if defined(OS_CHROMEOS)
612      return disabled_system_component_ids_.find(notifier_id.id) ==
613          disabled_system_component_ids_.end();
614#else
615      // We do not disable system component notifications.
616      return true;
617#endif
618  }
619
620  NOTREACHED();
621  return false;
622}
623
624void DesktopNotificationService::SetNotifierEnabled(
625    const NotifierId& notifier_id,
626    bool enabled) {
627  DCHECK_NE(NotifierId::WEB_PAGE, notifier_id.type);
628
629  bool add_new_item = false;
630  const char* pref_name = NULL;
631  scoped_ptr<base::StringValue> id;
632  switch (notifier_id.type) {
633    case NotifierId::APPLICATION:
634      pref_name = prefs::kMessageCenterDisabledExtensionIds;
635      add_new_item = !enabled;
636      id.reset(new base::StringValue(notifier_id.id));
637      FirePermissionLevelChangedEvent(notifier_id, enabled);
638      break;
639    case NotifierId::SYSTEM_COMPONENT:
640#if defined(OS_CHROMEOS)
641      pref_name = prefs::kMessageCenterDisabledSystemComponentIds;
642      add_new_item = !enabled;
643      id.reset(new base::StringValue(notifier_id.id));
644#else
645      return;
646#endif
647      break;
648    default:
649      NOTREACHED();
650  }
651  DCHECK(pref_name != NULL);
652
653  ListPrefUpdate update(profile_->GetPrefs(), pref_name);
654  base::ListValue* const list = update.Get();
655  if (add_new_item) {
656    // AppendIfNotPresent will delete |adding_value| when the same value
657    // already exists.
658    list->AppendIfNotPresent(id.release());
659  } else {
660    list->Remove(*id, NULL);
661  }
662}
663
664void DesktopNotificationService::ShowWelcomeNotificationIfNecessary(
665    const Notification& notification) {
666  if (!chrome_now_welcome_notification_) {
667    chrome_now_welcome_notification_ =
668        ExtensionWelcomeNotification::Create(kChromeNowExtensionID, profile_);
669  }
670
671  if (chrome_now_welcome_notification_) {
672    chrome_now_welcome_notification_->ShowWelcomeNotificationIfNecessary(
673        notification);
674  }
675}
676
677void DesktopNotificationService::OnStringListPrefChanged(
678    const char* pref_name, std::set<std::string>* ids_field) {
679  ids_field->clear();
680  // Separate GetPrefs()->GetList() to analyze the crash. See crbug.com/322320
681  const PrefService* pref_service = profile_->GetPrefs();
682  CHECK(pref_service);
683  const base::ListValue* pref_list = pref_service->GetList(pref_name);
684  for (size_t i = 0; i < pref_list->GetSize(); ++i) {
685    std::string element;
686    if (pref_list->GetString(i, &element) && !element.empty())
687      ids_field->insert(element);
688    else
689      LOG(WARNING) << i << "-th element is not a string for " << pref_name;
690  }
691}
692
693void DesktopNotificationService::Observe(
694    int type,
695    const content::NotificationSource& source,
696    const content::NotificationDetails& details) {
697#if defined(ENABLE_EXTENSIONS)
698  DCHECK_EQ(chrome::NOTIFICATION_EXTENSION_UNINSTALLED_DEPRECATED, type);
699
700  extensions::Extension* extension =
701      content::Details<extensions::Extension>(details).ptr();
702  NotifierId notifier_id(NotifierId::APPLICATION, extension->id());
703  if (IsNotifierEnabled(notifier_id))
704    return;
705
706  // The settings for ephemeral apps will be persisted across cache evictions.
707  if (extensions::util::IsEphemeralApp(extension->id(), profile_))
708    return;
709
710  SetNotifierEnabled(notifier_id, true);
711#endif
712}
713
714void DesktopNotificationService::FirePermissionLevelChangedEvent(
715    const NotifierId& notifier_id, bool enabled) {
716#if defined(ENABLE_EXTENSIONS)
717  DCHECK_EQ(NotifierId::APPLICATION, notifier_id.type);
718  extensions::api::notifications::PermissionLevel permission =
719      enabled ? extensions::api::notifications::PERMISSION_LEVEL_GRANTED
720              : extensions::api::notifications::PERMISSION_LEVEL_DENIED;
721  scoped_ptr<base::ListValue> args(new base::ListValue());
722  args->Append(new base::StringValue(
723      extensions::api::notifications::ToString(permission)));
724  scoped_ptr<extensions::Event> event(new extensions::Event(
725      extensions::api::notifications::OnPermissionLevelChanged::kEventName,
726      args.Pass()));
727  extensions::EventRouter::Get(profile_)
728      ->DispatchEventToExtension(notifier_id.id, event.Pass());
729
730  // Tell the IO thread that this extension's permission for notifications
731  // has changed.
732  extensions::InfoMap* extension_info_map =
733      extensions::ExtensionSystem::Get(profile_)->info_map();
734  BrowserThread::PostTask(
735      BrowserThread::IO, FROM_HERE,
736      base::Bind(&extensions::InfoMap::SetNotificationsDisabled,
737                 extension_info_map, notifier_id.id, !enabled));
738#endif
739}
740