chrome/browser/web_resource/promo_resource_service.cc

   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/web_resource/promo_resource_service.h"
   6
   7 #include "base/bind.h"
   8 #include "base/command_line.h"
   9 #include "base/location.h"
  10 #include "base/prefs/pref_registry_simple.h"
  11 #include "base/prefs/pref_service.h"
  12 #include "base/single_thread_task_runner.h"
  13 #include "base/thread_task_runner_handle.h"
  14 #include "base/threading/thread_restrictions.h"
  15 #include "base/values.h"
  16 #include "chrome/browser/browser_process.h"
  17 #include "chrome/browser/web_resource/notification_promo.h"
  18 #include "components/pref_registry/pref_registry_syncable.h"
  19 #include "components/web_resource/web_resource_pref_names.h"
  20 #include "components/web_resource/web_resource_switches.h"
  21 #include "url/gurl.h"
  22
  23 namespace {
  24
  25 // Delay on first fetch so we don't interfere with startup.
  26 const int kStartResourceFetchDelay = 5000;
  27
  28 // Delay between calls to fetch the promo json: 6 hours in production, and 3 min
  29 // in debug.
  30 const int kCacheUpdateDelay = 6 * 60 * 60 * 1000;
  31 const int kTestCacheUpdateDelay = 3 * 60 * 1000;
  32
  33 // The promotion type used for Unpack() and ScheduleNotificationOnInit().
  34 const NotificationPromo::PromoType kValidPromoTypes[] = {
  35 #if defined(OS_ANDROID) || defined(OS_IOS)
  36     NotificationPromo::MOBILE_NTP_SYNC_PROMO,
  37 #if defined(OS_IOS)
  38     NotificationPromo::MOBILE_NTP_WHATS_NEW_PROMO,
  39 #endif  // defined(OS_IOS)
  40 #else
  41     NotificationPromo::NTP_NOTIFICATION_PROMO,
  42     NotificationPromo::NTP_BUBBLE_PROMO,
  43 #endif
  44 };
  45
  46 GURL GetPromoResourceURL() {
  47   const std::string promo_server_url =
  48       base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
  49           switches::kPromoServerURL);
  50   return promo_server_url.empty() ?
  51       NotificationPromo::PromoServerURL() : GURL(promo_server_url);
  52 }
  53
  54 bool IsTest() {
  55   return base::CommandLine::ForCurrentProcess()->HasSwitch(
  56       switches::kPromoServerURL);
  57 }
  58
  59 int GetCacheUpdateDelay() {
  60   return IsTest() ? kTestCacheUpdateDelay : kCacheUpdateDelay;
  61 }
  62
  63 }  // namespace
  64
  65 // static
  66 void PromoResourceService::RegisterPrefs(PrefRegistrySimple* registry) {
  67   registry->RegisterStringPref(prefs::kNtpPromoResourceCacheUpdate, "0");
  68   NotificationPromo::RegisterPrefs(registry);
  69 }
  70
  71 // static
  72 void PromoResourceService::RegisterProfilePrefs(
  73     user_prefs::PrefRegistrySyncable* registry) {
  74   // TODO(dbeam): This is registered only for migration; remove in M28
  75   // when all prefs have been cleared.  http://crbug.com/168887
  76   registry->RegisterStringPref(prefs::kNtpPromoResourceCacheUpdate, "0");
  77   NotificationPromo::RegisterProfilePrefs(registry);
  78 }
  79
  80 // static
  81 void PromoResourceService::MigrateUserPrefs(PrefService* user_prefs) {
  82   user_prefs->ClearPref(prefs::kNtpPromoResourceCacheUpdate);
  83   NotificationPromo::MigrateUserPrefs(user_prefs);
  84 }
  85
  86 PromoResourceService::PromoResourceService()
  87     : ChromeWebResourceService(g_browser_process->local_state(),
  88                                GetPromoResourceURL(),
  89                                true,  // append locale to URL
  90                                prefs::kNtpPromoResourceCacheUpdate,
  91                                kStartResourceFetchDelay,
  92                                GetCacheUpdateDelay()),
  93       weak_ptr_factory_(this) {
  94   ScheduleNotificationOnInit();
  95 }
  96
  97 PromoResourceService::~PromoResourceService() {
  98 }
  99
 100 scoped_ptr<PromoResourceService::StateChangedSubscription>
 101 PromoResourceService::RegisterStateChangedCallback(
 102     const base::Closure& closure) {
 103   return callback_list_.Add(closure);
 104 }
 105
 106 void PromoResourceService::ScheduleNotification(
 107     const NotificationPromo& notification_promo) {
 108   const double promo_start = notification_promo.StartTimeForGroup();
 109   const double promo_end = notification_promo.EndTime();
 110
 111   if (promo_start > 0 && promo_end > 0) {
 112     const int64 ms_until_start =
 113         static_cast<int64>((base::Time::FromDoubleT(
 114             promo_start) - base::Time::Now()).InMilliseconds());
 115     const int64 ms_until_end =
 116         static_cast<int64>((base::Time::FromDoubleT(
 117             promo_end) - base::Time::Now()).InMilliseconds());
 118     if (ms_until_start > 0) {
 119       // Schedule the next notification to happen at the start of promotion.
 120       PostNotification(ms_until_start);
 121     } else if (ms_until_end > 0) {
 122       if (ms_until_start <= 0) {
 123         // The promo is active.  Notify immediately.
 124         PostNotification(0);
 125       }
 126       // Schedule the next notification to happen at the end of promotion.
 127       PostNotification(ms_until_end);
 128     } else {
 129       // The promo (if any) has finished.  Notify immediately.
 130       PostNotification(0);
 131     }
 132   } else {
 133       // The promo (if any) was apparently cancelled.  Notify immediately.
 134       PostNotification(0);
 135   }
 136 }
 137
 138 void PromoResourceService::ScheduleNotificationOnInit() {
 139   // If the promo start is in the future, set a notification task to
 140   // invalidate the NTP cache at the time of the promo start.
 141   for (size_t i = 0; i < arraysize(kValidPromoTypes); ++i) {
 142     NotificationPromo notification_promo;
 143     notification_promo.InitFromPrefs(kValidPromoTypes[i]);
 144     ScheduleNotification(notification_promo);
 145   }
 146 }
 147
 148 void PromoResourceService::PostNotification(int64 delay_ms) {
 149   // Note that this could cause re-issuing a notification every time
 150   // we receive an update from a server if something goes wrong.
 151   // Given that this couldn't happen more frequently than every
 152   // kCacheUpdateDelay milliseconds, we should be fine.
 153   // TODO(achuith): This crashes if we post delay_ms = 0 to the message loop.
 154   // during startup.
 155   if (delay_ms > 0) {
 156     base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
 157         FROM_HERE, base::Bind(&PromoResourceService::PromoResourceStateChange,
 158                               weak_ptr_factory_.GetWeakPtr()),
 159         base::TimeDelta::FromMilliseconds(delay_ms));
 160   } else if (delay_ms == 0) {
 161     PromoResourceStateChange();
 162   }
 163 }
 164
 165 void PromoResourceService::PromoResourceStateChange() {
 166   callback_list_.Notify();
 167 }
 168
 169 void PromoResourceService::Unpack(const base::DictionaryValue& parsed_json) {
 170   for (size_t i = 0; i < arraysize(kValidPromoTypes); ++i) {
 171     NotificationPromo notification_promo;
 172     notification_promo.InitFromJson(parsed_json, kValidPromoTypes[i]);
 173     if (notification_promo.new_notification())
 174       ScheduleNotification(notification_promo);
 175   }
 176 }