Refactor WebResourceService class, making it more generic. Move all the prom...

chrome/browser/web_resource/promo_resource_service.cc

Index: chrome/browser/web_resource/promo_resource_service.cc
===================================================================
--- chrome/browser/web_resource/promo_resource_service.cc	(revision 0)
+++ chrome/browser/web_resource/promo_resource_service.cc	(revision 0)
@@ -0,0 +1,358 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/web_resource/promo_resource_service.h"
+
+#include "base/string_number_conversions.h"
+#include "base/threading/thread_restrictions.h"
+#include "base/time.h"
+#include "base/values.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/browser_thread.h"
+#include "chrome/browser/platform_util.h"
+#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/sync/sync_ui_util.h"
+#include "chrome/common/notification_service.h"
+#include "chrome/common/notification_type.h"
+#include "chrome/common/pref_names.h"
+
+namespace {
+
+// Delay on first fetch so we don't interfere with startup.
+static const int kStartResourceFetchDelay = 5000;
+
+// Delay between calls to update the cache (48 hours).
+static const int kCacheUpdateDelay = 48 * 60 * 60 * 1000;
+
+// Users are randomly assigned to one of kNTPPromoGroupSize buckets, in order
+// to be able to roll out promos slowly, or display different promos to
+// different groups.
+static const int kNTPPromoGroupSize = 16;
+
+// Maximum number of hours for each time slice (4 weeks).
+static const int kMaxTimeSliceHours = 24 * 7 * 4;
+
+// Used to determine which build type should be shown a given promo.
+enum BuildType {
+  DEV_BUILD = 1,
+  BETA_BUILD = 1 << 1,
+  STABLE_BUILD = 1 << 2,
+};
+
+}  // namespace
+
+const char* PromoResourceService::kCurrentTipPrefName = "current_tip";
+const char* PromoResourceService::kTipCachePrefName = "tips";
+
+// Server for dynamically loaded NTP HTML elements. TODO(mirandac): append
+// locale for future usage, when we're serving localizable strings.
+const char* PromoResourceService::kDefaultPromoResourceServer =
+    "https://www.google.com/support/chrome/bin/topic/1142433/inproduct?hl=";
+
+PromoResourceService::PromoResourceService(Profile* profile)
+    : WebResourceService(profile,
+                         PromoResourceService::kDefaultPromoResourceServer,
+                         true,  // append locale to URL
+                         NotificationType::PROMO_RESOURCE_STATE_CHANGED,
+                         prefs::kNTPPromoResourceCacheUpdate,
+                         kStartResourceFetchDelay,
+                         kCacheUpdateDelay),
+      web_resource_cache_(NULL) {
+  Init();
+}
+
+PromoResourceService::~PromoResourceService() { }
+
+void PromoResourceService::Init() {
+  prefs_->RegisterStringPref(prefs::kNTPPromoResourceCacheUpdate, "0");
+  prefs_->RegisterDoublePref(prefs::kNTPCustomLogoStart, 0);
+  prefs_->RegisterDoublePref(prefs::kNTPCustomLogoEnd, 0);
+  prefs_->RegisterDoublePref(prefs::kNTPPromoStart, 0);
+  prefs_->RegisterDoublePref(prefs::kNTPPromoEnd, 0);
+  prefs_->RegisterStringPref(prefs::kNTPPromoLine, std::string());
+  prefs_->RegisterBooleanPref(prefs::kNTPPromoClosed, false);
+  prefs_->RegisterIntegerPref(prefs::kNTPPromoGroup, -1);
+  prefs_->RegisterIntegerPref(prefs::kNTPPromoBuild,
+                              DEV_BUILD | BETA_BUILD | STABLE_BUILD);
+  prefs_->RegisterIntegerPref(prefs::kNTPPromoGroupTimeSlice, 0);
+
+  // If the promo start is in the future, set a notification task to invalidate
+  // the NTP cache at the time of the promo start.
+  double promo_start = prefs_->GetDouble(prefs::kNTPPromoStart);
+  double promo_end = prefs_->GetDouble(prefs::kNTPPromoEnd);
+  ScheduleNotification(promo_start, promo_end);
+}
+
+void PromoResourceService::Unpack(const DictionaryValue& parsed_json) {
+  UnpackLogoSignal(parsed_json);
+  UnpackPromoSignal(parsed_json);
+}
+
+void PromoResourceService::ScheduleNotification(double promo_start,
+                                                double promo_end) {
+  if (promo_start > 0 && promo_end > 0) {
+    int64 ms_until_start =
+        static_cast<int64>((base::Time::FromDoubleT(
+            promo_start) - base::Time::Now()).InMilliseconds());
+    int64 ms_until_end =
+        static_cast<int64>((base::Time::FromDoubleT(
+            promo_end) - base::Time::Now()).InMilliseconds());
+    if (ms_until_start > 0)
+      PostNotification(ms_until_start);
+    if (ms_until_end > 0) {
+      PostNotification(ms_until_end);
+      if (ms_until_start <= 0) {
+        // Notify immediately if time is between start and end.
+        PostNotification(0);
+      }
+    }
+  }
+}
+
+void PromoResourceService::UnpackTips(const DictionaryValue& parsed_json) {
+  // Get dictionary of cached preferences.
+  web_resource_cache_ =
+      prefs_->GetMutableDictionary(prefs::kNTPPromoResourceCache);
+
+  // The list of individual tips.
+  ListValue* tip_holder = new ListValue();
+  web_resource_cache_->Set(PromoResourceService::kTipCachePrefName, tip_holder);
+
+  DictionaryValue* topic_dict;
+  ListValue* answer_list;
+  std::string topic_id;
+  std::string answer_id;
+  std::string inproduct;
+  int tip_counter = 0;
+
+  if (parsed_json.GetDictionary("topic", &topic_dict)) {
+    if (topic_dict->GetString("topic_id", &topic_id))
+      web_resource_cache_->SetString("topic_id", topic_id);
+    if (topic_dict->GetList("answers", &answer_list)) {
+      for (ListValue::const_iterator tip_iter = answer_list->begin();
+           tip_iter != answer_list->end(); ++tip_iter) {
+        if (!(*tip_iter)->IsType(Value::TYPE_DICTIONARY))
+          continue;
+        DictionaryValue* a_dic =
+            static_cast<DictionaryValue*>(*tip_iter);
+        if (a_dic->GetString("inproduct", &inproduct)) {
+          tip_holder->Append(Value::CreateStringValue(inproduct));
+        }
+        tip_counter++;
+      }
+      // If tips exist, set current index to 0.
+      if (!inproduct.empty()) {
+        web_resource_cache_->SetInteger(
+            PromoResourceService::kCurrentTipPrefName, 0);
+      }
+    }
+  }
+}
+
+void PromoResourceService::UnpackPromoSignal(
+    const DictionaryValue& parsed_json) {
+  DictionaryValue* topic_dict;
+  ListValue* answer_list;
+  double old_promo_start = 0;
+  double old_promo_end = 0;
+  double promo_start = 0;
+  double promo_end = 0;
+
+  // Check for preexisting start and end values.
+  if (prefs_->HasPrefPath(prefs::kNTPPromoStart) &&
+      prefs_->HasPrefPath(prefs::kNTPPromoEnd)) {
+    old_promo_start = prefs_->GetDouble(prefs::kNTPPromoStart);
+    old_promo_end = prefs_->GetDouble(prefs::kNTPPromoEnd);
+  }
+
+  // Check for newly received start and end values.
+  if (parsed_json.GetDictionary("topic", &topic_dict)) {
+    if (topic_dict->GetList("answers", &answer_list)) {
+      std::string promo_start_string = "";
+      std::string promo_end_string = "";
+      std::string promo_string = "";
+      std::string promo_build = "";
+      int promo_build_type = 0;
+      int time_slice_hrs = 0;
+      for (ListValue::const_iterator tip_iter = answer_list->begin();
+           tip_iter != answer_list->end(); ++tip_iter) {
+        if (!(*tip_iter)->IsType(Value::TYPE_DICTIONARY))
+          continue;
+        DictionaryValue* a_dic =
+            static_cast<DictionaryValue*>(*tip_iter);
+        std::string promo_signal;
+        if (a_dic->GetString("name", &promo_signal)) {
+          if (promo_signal == "promo_start") {
+            a_dic->GetString("question", &promo_build);
+            size_t split = promo_build.find(":");
+            if (split != std::string::npos &&
+                base::StringToInt(promo_build.substr(0, split),
+                                  &promo_build_type) &&
+                base::StringToInt(promo_build.substr(split+1),
+                                  &time_slice_hrs) &&
+                promo_build_type >= 0 &&
+                promo_build_type <= (DEV_BUILD | BETA_BUILD | STABLE_BUILD) &&
+                time_slice_hrs >= 0 &&
+                time_slice_hrs <= kMaxTimeSliceHours) {
+              prefs_->SetInteger(prefs::kNTPPromoBuild, promo_build_type);
+              prefs_->SetInteger(prefs::kNTPPromoGroupTimeSlice,
+                                 time_slice_hrs);
+            } else {
+              // If no time data or bad time data are set, show promo on all
+              // builds with no time slicing.
+              prefs_->SetInteger(prefs::kNTPPromoBuild,
+                                 DEV_BUILD | BETA_BUILD | STABLE_BUILD);
+              prefs_->SetInteger(prefs::kNTPPromoGroupTimeSlice, 0);
+            }
+            a_dic->GetString("inproduct", &promo_start_string);
+            a_dic->GetString("tooltip", &promo_string);
+            prefs_->SetString(prefs::kNTPPromoLine, promo_string);
+            srand(static_cast<uint32>(time(NULL)));
+            prefs_->SetInteger(prefs::kNTPPromoGroup,
+                               rand() % kNTPPromoGroupSize);
+          } else if (promo_signal == "promo_end") {
+            a_dic->GetString("inproduct", &promo_end_string);
+          }
+        }
+      }
+      if (!promo_start_string.empty() &&
+          promo_start_string.length() > 0 &&
+          !promo_end_string.empty() &&
+          promo_end_string.length() > 0) {
+        base::Time start_time;
+        base::Time end_time;
+        if (base::Time::FromString(
+                ASCIIToWide(promo_start_string).c_str(), &start_time) &&
+            base::Time::FromString(
+                ASCIIToWide(promo_end_string).c_str(), &end_time)) {
+          // Add group time slice, adjusted from hours to seconds.
+          promo_start = start_time.ToDoubleT() +
+              (prefs_->FindPreference(prefs::kNTPPromoGroup) ?
+                  prefs_->GetInteger(prefs::kNTPPromoGroup) *
+                      time_slice_hrs * 60 * 60 : 0);
+          promo_end = end_time.ToDoubleT();
+        }
+      }
+    }
+  }
+
+  // If start or end times have changed, trigger a new web resource
+  // notification, so that the logo on the NTP is updated. This check is
+  // outside the reading of the web resource data, because the absence of
+  // dates counts as a triggering change if there were dates before.
+  // Also reset the promo closed preference, to signal a new promo.
+  if (!(old_promo_start == promo_start) ||
+      !(old_promo_end == promo_end)) {
+    prefs_->SetDouble(prefs::kNTPPromoStart, promo_start);
+    prefs_->SetDouble(prefs::kNTPPromoEnd, promo_end);
+    prefs_->SetBoolean(prefs::kNTPPromoClosed, false);
+    ScheduleNotification(promo_start, promo_end);
+  }
+}
+
+void PromoResourceService::UnpackLogoSignal(
+    const DictionaryValue& parsed_json) {
+  DictionaryValue* topic_dict;
+  ListValue* answer_list;
+  double old_logo_start = 0;
+  double old_logo_end = 0;
+  double logo_start = 0;
+  double logo_end = 0;
+
+  // Check for preexisting start and end values.
+  if (prefs_->HasPrefPath(prefs::kNTPCustomLogoStart) &&
+      prefs_->HasPrefPath(prefs::kNTPCustomLogoEnd)) {
+    old_logo_start = prefs_->GetDouble(prefs::kNTPCustomLogoStart);
+    old_logo_end = prefs_->GetDouble(prefs::kNTPCustomLogoEnd);
+  }
+
+  // Check for newly received start and end values.
+  if (parsed_json.GetDictionary("topic", &topic_dict)) {
+    if (topic_dict->GetList("answers", &answer_list)) {
+      std::string logo_start_string = "";
+      std::string logo_end_string = "";
+      for (ListValue::const_iterator tip_iter = answer_list->begin();
+           tip_iter != answer_list->end(); ++tip_iter) {
+        if (!(*tip_iter)->IsType(Value::TYPE_DICTIONARY))
+          continue;
+        DictionaryValue* a_dic =
+            static_cast<DictionaryValue*>(*tip_iter);
+        std::string logo_signal;
+        if (a_dic->GetString("name", &logo_signal)) {
+          if (logo_signal == "custom_logo_start") {
+            a_dic->GetString("inproduct", &logo_start_string);
+          } else if (logo_signal == "custom_logo_end") {
+            a_dic->GetString("inproduct", &logo_end_string);
+          }
+        }
+      }
+      if (!logo_start_string.empty() &&
+          logo_start_string.length() > 0 &&
+          !logo_end_string.empty() &&
+          logo_end_string.length() > 0) {
+        base::Time start_time;
+        base::Time end_time;
+        if (base::Time::FromString(
+                ASCIIToWide(logo_start_string).c_str(), &start_time) &&
+            base::Time::FromString(
+                ASCIIToWide(logo_end_string).c_str(), &end_time)) {
+          logo_start = start_time.ToDoubleT();
+          logo_end = end_time.ToDoubleT();
+        }
+      }
+    }
+  }
+
+  // If logo start or end times have changed, trigger a new web resource
+  // notification, so that the logo on the NTP is updated. This check is
+  // outside the reading of the web resource data, because the absence of
+  // dates counts as a triggering change if there were dates before.
+  if (!(old_logo_start == logo_start) ||
+      !(old_logo_end == logo_end)) {
+    prefs_->SetDouble(prefs::kNTPCustomLogoStart, logo_start);
+    prefs_->SetDouble(prefs::kNTPCustomLogoEnd, logo_end);
+    NotificationService* service = NotificationService::current();
+    service->Notify(NotificationType::PROMO_RESOURCE_STATE_CHANGED,
+                    Source<WebResourceService>(this),
+                    NotificationService::NoDetails());
+  }
+}
+
+namespace PromoResourceServiceUtil {
+
+bool CanShowPromo(Profile* profile) {
+  bool promo_closed = false;
+  PrefService* prefs = profile->GetPrefs();
+  if (prefs->HasPrefPath(prefs::kNTPPromoClosed))
+    promo_closed = prefs->GetBoolean(prefs::kNTPPromoClosed);
+
+  // Only show if not synced.
+  bool is_synced =
+      (profile->HasProfileSyncService() &&
+          sync_ui_util::GetStatus(
+              profile->GetProfileSyncService()) == sync_ui_util::SYNCED);
+
+  // GetVersionStringModifier hits the registry. See http://crbug.com/70898.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
+  const std::string channel = platform_util::GetVersionStringModifier();
+  bool is_promo_build = false;
+  if (prefs->HasPrefPath(prefs::kNTPPromoBuild)) {
+    int builds_allowed = prefs->GetInteger(prefs::kNTPPromoBuild);
+    if (channel == "dev") {
+      is_promo_build = (DEV_BUILD & builds_allowed) != 0;
+    } else if (channel == "beta") {
+      is_promo_build = (BETA_BUILD & builds_allowed) != 0;
+    } else if (channel == "stable") {
+      is_promo_build = (STABLE_BUILD & builds_allowed) != 0;
+    } else {
+      is_promo_build = true;
+    }
+  }
+
+  return !promo_closed && !is_synced && is_promo_build;
+}
+
+}  // namespace PromoResourceServiceUtil
+