components/variations/variations_experiment_util.cc

   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 "components/variations/variations_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 variations {
  15
  16 const base::char16 kExperimentLabelSeparator = ';';
  17
  18 namespace {
  19
  20 const char* const kDays[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
  21
  22 const char* const kMonths[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
  23                                "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
  24
  25 }  // namespace
  26
  27 base::string16 BuildExperimentDateString(const base::Time& current_time) {
  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   current_time.UTCExplode(&then);
  40   then.year += 1;
  41   DCHECK(then.HasValidValues());
  42
  43   return base::UTF8ToUTF16(
  44       base::StringPrintf("%s, %02d %s %d %02d:%02d:%02d GMT",
  45                          kDays[then.day_of_week],
  46                          then.day_of_month,
  47                          kMonths[then.month - 1],
  48                          then.year,
  49                          then.hour,
  50                          then.minute,
  51                          then.second));
  52 }
  53
  54 }  // namespace variations