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