components/variations/study_filtering.h

   1 // Copyright 2014 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 #ifndef COMPONENTS_VARIATIONS_STUDY_FILTERING_H_
   6 #define COMPONENTS_VARIATIONS_STUDY_FILTERING_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/compiler_specific.h"
  12 #include "base/time/time.h"
  13 #include "base/version.h"
  14 #include "components/variations/processed_study.h"
  15 #include "components/variations/proto/study.pb.h"
  16 #include "components/variations/proto/variations_seed.pb.h"
  17
  18 namespace variations {
  19
  20 // Internal functions exposed for testing purposes only.
  21 namespace internal {
  22
  23 // Checks whether a study is applicable for the given |channel| per |filter|.
  24 bool CheckStudyChannel(const Study_Filter& filter, Study_Channel channel);
  25
  26 // Checks whether a study is applicable for the given |form_factor| per
  27 // |filter|.
  28 bool CheckStudyFormFactor(const Study_Filter& filter,
  29                           Study_FormFactor form_factor);
  30
  31 // Checks whether a study is applicable for the given |hardware_class| per
  32 // |filter|.
  33 bool CheckStudyHardwareClass(const Study_Filter& filter,
  34                              const std::string& hardware_class);
  35
  36 // Checks whether a study is applicable for the given |locale| per |filter|.
  37 bool CheckStudyLocale(const Study_Filter& filter, const std::string& locale);
  38
  39 // Checks whether a study is applicable for the given |platform| per |filter|.
  40 bool CheckStudyPlatform(const Study_Filter& filter, Study_Platform platform);
  41
  42 // Checks whether a study is applicable for the given date/time per |filter|.
  43 bool CheckStudyStartDate(const Study_Filter& filter,
  44                          const base::Time& date_time);
  45
  46 // Checks whether a study is applicable for the given version per |filter|.
  47 bool CheckStudyVersion(const Study_Filter& filter,
  48                        const base::Version& version);
  49
  50 // Checks whether |study| is expired using the given date/time.
  51 bool IsStudyExpired(const Study& study, const base::Time& date_time);
  52
  53 // Returns whether |study| should be disabled according to its restriction
  54 // parameters.
  55 bool ShouldAddStudy(const Study& study,
  56                     const std::string& locale,
  57                     const base::Time& reference_date,
  58                     const base::Version& version,
  59                     Study_Channel channel,
  60                     Study_FormFactor form_factor,
  61                     const std::string& hardware_class);
  62
  63 }  // namespace internal
  64
  65 // Filters the list of studies in |seed| and validates and pre-processes them,
  66 // adding any kept studies to |filtered_studies| list. Ensures that the
  67 // resulting list will not have more than one study with the same name.
  68 void FilterAndValidateStudies(const VariationsSeed& seed,
  69                               const std::string& locale,
  70                               const base::Time& reference_date,
  71                               const base::Version& version,
  72                               Study_Channel channel,
  73                               Study_FormFactor form_factor,
  74                               const std::string& hardware_class,
  75                               std::vector<ProcessedStudy>* filtered_studies);
  76
  77 }  // namespace variations
  78
  79 #endif  // COMPONENTS_VARIATIONS_STUDY_FILTERING_H_