promo_resource_service.cc revision 68043e1e95eeb07d5cae7aca370b26518b0867d6 
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
23namespace {
24
25// Delay on first fetch so we don't interfere with startup.
26const int kStartResourceFetchDelay = 5000;
27
28// Delay between calls to fetch the promo json: 6 hours in production, and 3 min
29// in debug.
30const int kCacheUpdateDelay = 6 * 60 * 60 * 1000;
31const int kTestCacheUpdateDelay = 3 * 60 * 1000;
32
33// The promotion type used for Unpack() and ScheduleNotificationOnInit().
34const 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
43GURL 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
50bool IsTest() {
51  return CommandLine::ForCurrentProcess()->HasSwitch(switches::kPromoServerURL);
52}
53
54int GetCacheUpdateDelay() {
55  return IsTest() ? kTestCacheUpdateDelay : kCacheUpdateDelay;
56}
57
58}  // namespace
59
60// static
61void PromoResourceService::RegisterPrefs(PrefRegistrySimple* registry) {
62  registry->RegisterStringPref(prefs::kNtpPromoResourceCacheUpdate, "0");
63  NotificationPromo::RegisterPrefs(registry);
64}
65
66// static
67void 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
79void PromoResourceService::MigrateUserPrefs(PrefService* user_prefs) {
80  user_prefs->ClearPref(prefs::kNtpPromoResourceCacheUpdate);
81  NotificationPromo::MigrateUserPrefs(user_prefs);
82}
83
84PromoResourceService::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
95PromoResourceService::~PromoResourceService() {
96}
97
98void 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
130void 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
140void 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
158void 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
166void 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