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      1 // Copyright 2013 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/installer/util/google_update_experiment_util.h"
      6 
      7 #include <vector>
      8 
      9 #include "base/logging.h"
     10 #include "base/strings/stringprintf.h"
     11 #include "base/strings/utf_string_conversions.h"
     12 #include "base/time/time.h"
     13 
     14 namespace installer {
     15 
     16 namespace {
     17 
     18 const char* const kDays[] =
     19     { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
     20 
     21 const char* const kMonths[] =
     22     { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
     23       "Oct", "Nov", "Dec"};
     24 
     25 }
     26 
     27 string16 BuildExperimentDateString() {
     28   // The Google Update experiment_labels timestamp format is:
     29   // "DAY, DD0 MON YYYY HH0:MI0:SE0 TZ"
     30   //  DAY = 3 character day of week,
     31   //  DD0 = 2 digit day of month,
     32   //  MON = 3 character month of year,
     33   //  YYYY = 4 digit year,
     34   //  HH0 = 2 digit hour,
     35   //  MI0 = 2 digit minute,
     36   //  SE0 = 2 digit second,
     37   //  TZ = 3 character timezone
     38   base::Time::Exploded then = {};
     39   base::Time::Now().UTCExplode(&then);
     40   then.year += 1;
     41   DCHECK(then.HasValidValues());
     42 
     43   return UTF8ToUTF16(base::StringPrintf("%s, %02d %s %d %02d:%02d:%02d GMT",
     44                                         kDays[then.day_of_week],
     45                                         then.day_of_month,
     46                                         kMonths[then.month - 1],
     47                                         then.year,
     48                                         then.hour,
     49                                         then.minute,
     50                                         then.second));
     51 }
     52 
     53 }  // namespace installer
     54 
     55