Push API: Require user visible notification, else show auto notification

chrome/browser/services/gcm/push_messaging_service_impl.cc

Index: chrome/browser/services/gcm/push_messaging_service_impl.cc
diff --git a/chrome/browser/services/gcm/push_messaging_service_impl.cc b/chrome/browser/services/gcm/push_messaging_service_impl.cc
index 1444176cfacc5b1fa1a2aabe05fb526dd3e1e1f0..62a5787bff017788ed6c274037d1fc38748b4c3c 100644
--- a/chrome/browser/services/gcm/push_messaging_service_impl.cc
+++ b/chrome/browser/services/gcm/push_messaging_service_impl.cc
@@ -10,6 +10,10 @@
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/notifications/notification_ui_manager.h"
+#include "chrome/browser/notifications/platform_notification_service_impl.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/services/gcm/gcm_profile_service.h"
 #include "chrome/browser/services/gcm/gcm_profile_service_factory.h"
@@ -19,12 +23,17 @@
 #include "chrome/browser/services/gcm/push_messaging_permission_context_factory.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
+#include "chrome/grit/generated_resources.h"
 #include "components/content_settings/core/common/permission_request_id.h"
 #include "components/gcm_driver/gcm_driver.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/common/child_process_host.h"
+#include "content/public/common/platform_notification_data.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/base/l10n/l10n_util.h"
 
 namespace gcm {
 
@@ -152,7 +161,6 @@ void PushMessagingServiceImpl::OnMessage(
   // TODO(johnme): Make sure this is clearly documented for developers.
   PushMessagingApplicationId application_id =
       PushMessagingApplicationId::Parse(app_id);
-  DCHECK(application_id.IsValid());
   GCMClient::MessageData::const_iterator it = message.data.find("data");
   if (application_id.IsValid() && it != message.data.end()) {
     if (!HasPermission(application_id.origin)) {
@@ -192,10 +200,15 @@ void PushMessagingServiceImpl::DeliverMessageCallback(
   // Service Worker corresponding to app_id (and/or on an internals page).
   // TODO(mvanouwerkerk): Is there a way to recover from failure?
   switch (status) {
+    // Call RequireUserVisibleUX if the message was delivered to the Service
+    // Worker JS, even if the website's event handler failed (to prevent sites
+    // deliberately failing in order to avoid having to show notifications).
     case content::PUSH_DELIVERY_STATUS_SUCCESS:
+    case content::PUSH_DELIVERY_STATUS_EVENT_WAITUNTIL_REJECTED:
+      RequireUserVisibleUX(application_id);
+      break;
     case content::PUSH_DELIVERY_STATUS_INVALID_MESSAGE:
     case content::PUSH_DELIVERY_STATUS_SERVICE_WORKER_ERROR:
-    case content::PUSH_DELIVERY_STATUS_EVENT_WAITUNTIL_REJECTED:
       break;
     case content::PUSH_DELIVERY_STATUS_NO_SERVICE_WORKER:
       Unregister(application_id, UnregisterCallback());
@@ -203,6 +216,42 @@ void PushMessagingServiceImpl::DeliverMessageCallback(
   }
 }
 
+void PushMessagingServiceImpl::RequireUserVisibleUX(
+    const PushMessagingApplicationId& application_id) {
+#if defined(ENABLE_NOTIFICATIONS)
+  // TODO(johnme): Add test.
+  // TODO(johnme): Relax this heuristic slightly.
+  int notification_count = g_browser_process->notification_ui_manager()->
+      GetAllIdsByProfileAndSourceOrigin(profile_, application_id.origin).size();
+  if (notification_count > 0)
+    return;
+
+  // If we haven't returned yet, the site failed to show a notification, so we
+  // will show a generic notification. See https://crbug.com/437277
+  // TODO(johnme): The generic notification should probably automatically close
+  // itself when the next push message arrives?
+  content::PlatformNotificationData notification_data;
+  // TODO(johnme): Switch to FormatOriginForDisplay from crbug.com/402698
+  notification_data.title = l10n_util::GetStringFUTF16(
+      IDS_PUSH_MESSAGING_GENERIC_NOTIFICATION_TITLE,
+      base::UTF8ToUTF16(application_id.origin.host()));
+  notification_data.direction =
+      content::PlatformNotificationData::NotificationDirectionLeftToRight;
+  notification_data.body =
+      l10n_util::GetStringUTF16(IDS_PUSH_MESSAGING_GENERIC_NOTIFICATION_BODY);
+  notification_data.tag =
+      base::ASCIIToUTF16("user_visible_auto_notification");
+  notification_data.icon = GURL();  // TODO(johnme): Better icon?
+  PlatformNotificationServiceImpl::GetInstance()->DisplayPersistentNotification(
+      profile_,
+      application_id.service_worker_registration_id,
+      application_id.origin,
+      SkBitmap() /* icon */,
+      notification_data,
+      content::ChildProcessHost::kInvalidUniqueID /* render_process_id */);
+#endif
+}
+
 void PushMessagingServiceImpl::OnMessagesDeleted(const std::string& app_id) {
   // TODO(mvanouwerkerk): Fire push error event on the Service Worker
   // corresponding to app_id.