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// Copyright (c) 2012 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/installer/gcapi/gcapi_omaha_experiment.h"
#include "base/string16.h"
#include "base/stringprintf.h"
#include "base/string_number_conversions.h"
#include "base/time.h"
#include "base/win/registry.h"
#include "chrome/installer/util/browser_distribution.h"
#include "chrome/installer/util/google_update_constants.h"
using base::Time;
using base::TimeDelta;
using base::win::RegKey;
namespace {
const wchar_t kExperimentLabels[] = L"experiment_labels";
const wchar_t* kExperimentAppGuids[] = {
L"{4DC8B4CA-1BDA-483e-B5FA-D3C12E15B62D}",
L"{8A69D345-D564-463C-AFF1-A69D9E530F96}",
};
const wchar_t* kDays[] =
{ L"Sun", L"Mon", L"Tue", L"Wed", L"Thu", L"Fri", L"Sat" };
const wchar_t* kMonths[] = {L"Jan", L"Feb", L"Mar", L"Apr", L"May", L"Jun",
L"Jul", L"Aug", L"Sep", L"Oct", L"Nov", L"Dec"};
// Constructs a date string of the following format for the current time plus
// one year:
// "DAY, DD0 MON YYYY HH0:MI0:SE0 TZ"
// DAY = 3 character day of week,
// DD0 = 2 digit day of month,
// MON = 3 character month of year,
// YYYY = 4 digit year,
// HH0 = 2 digit hour,
// MI0 = 2 digit minute,
// SE0 = 2 digit second,
// TZ = 3 character timezone)
string16 BuildOmahaExperimentDateString() {
Time then_time = Time::Now() + TimeDelta::FromDays(365);
Time::Exploded then = {};
then_time.UTCExplode(&then);
if (!then.HasValidValues())
return L"";
string16 date_string;
base::SStringPrintf(&date_string,
L"%ls, %02d %ls %d %02d:%02d:%02d GMT",
kDays[then.day_of_week],
then.day_of_month,
kMonths[then.month - 1],
then.year,
then.hour,
then.minute,
then.second);
return date_string;
}
// Returns the number of weeks since 2/3/2003.
int GetCurrentRlzWeek() {
Time::Exploded february_third_2003_exploded = {2003, 2, 1, 3, 0, 0, 0, 0};
Time f = Time::FromUTCExploded(february_third_2003_exploded);
TimeDelta delta = Time::Now() - f;
return delta.InDays() / 7;
}
} // namespace
bool SetOmahaExperimentLabel(const wchar_t* brand_code) {
if (!brand_code) {
return false;
}
int week_number = GetCurrentRlzWeek();
if (week_number < 0 || week_number > 999)
week_number = 999;
string16 experiment_label;
base::SStringPrintf(&experiment_label,
L"%ls_%d|%ls",
brand_code,
week_number,
BuildOmahaExperimentDateString().c_str());
int successful_writes = 0;
for (int i = 0; i < arraysize(kExperimentAppGuids); ++i) {
string16 experiment_path(google_update::kRegPathClientState);
experiment_path += L"\\";
experiment_path += kExperimentAppGuids[i];
RegKey client_state(HKEY_LOCAL_MACHINE, experiment_path.c_str(),
KEY_SET_VALUE);
if (client_state.Valid()) {
if (client_state.WriteValue(kExperimentLabels,
experiment_label.c_str()) == ERROR_SUCCESS) {
successful_writes++;
}
}
}
return (successful_writes == arraysize(kExperimentAppGuids));
}
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