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// Copyright 2016 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 "components/ntp_snippets/features.h"
#include "base/feature_list.h"
#include "base/memory/ptr_util.h"
#include "base/time/clock.h"
#include "components/ntp_snippets/category_rankers/click_based_category_ranker.h"
#include "components/ntp_snippets/category_rankers/constant_category_ranker.h"
#include "components/variations/variations_associated_data.h"
namespace ntp_snippets {
const base::Feature kArticleSuggestionsFeature{
"NTPArticleSuggestions", base::FEATURE_ENABLED_BY_DEFAULT};
const base::Feature kBookmarkSuggestionsFeature{
"NTPBookmarkSuggestions", base::FEATURE_ENABLED_BY_DEFAULT};
const base::Feature kRecentOfflineTabSuggestionsFeature{
"NTPOfflinePageSuggestions", base::FEATURE_DISABLED_BY_DEFAULT};
const base::Feature kSaveToOfflineFeature{
"NTPSaveToOffline", base::FEATURE_ENABLED_BY_DEFAULT};
const base::Feature kOfflineBadgeFeature{
"NTPOfflineBadge", base::FEATURE_ENABLED_BY_DEFAULT};
const base::Feature kIncreasedVisibility{
"NTPSnippetsIncreasedVisibility", base::FEATURE_ENABLED_BY_DEFAULT};
const base::Feature kPhysicalWebPageSuggestionsFeature{
"NTPPhysicalWebPageSuggestions", base::FEATURE_DISABLED_BY_DEFAULT};
const base::Feature kForeignSessionsSuggestionsFeature{
"NTPForeignSessionsSuggestions", base::FEATURE_DISABLED_BY_DEFAULT};
const base::Feature kPreferAmpUrlsFeature{"NTPPreferAmpUrls",
base::FEATURE_ENABLED_BY_DEFAULT};
const base::Feature kCategoryRanker{"ContentSuggestionsCategoryRanker",
base::FEATURE_ENABLED_BY_DEFAULT};
const char kCategoryRankerParameter[] = "category_ranker";
const char kCategoryRankerConstantRanker[] = "constant";
const char kCategoryRankerClickBasedRanker[] = "click_based";
CategoryRankerChoice GetSelectedCategoryRanker() {
std::string category_ranker_value =
variations::GetVariationParamValueByFeature(kCategoryRanker,
kCategoryRankerParameter);
if (category_ranker_value.empty()) {
// Default, Enabled or Disabled.
return CategoryRankerChoice::CONSTANT;
}
if (category_ranker_value == kCategoryRankerConstantRanker) {
return CategoryRankerChoice::CONSTANT;
}
if (category_ranker_value == kCategoryRankerClickBasedRanker) {
return CategoryRankerChoice::CLICK_BASED;
}
LOG(DFATAL) << "The " << kCategoryRankerParameter << " parameter value is '"
<< category_ranker_value << "'";
return CategoryRankerChoice::CONSTANT;
}
std::unique_ptr<CategoryRanker> BuildSelectedCategoryRanker(
PrefService* pref_service,
std::unique_ptr<base::Clock> clock) {
CategoryRankerChoice choice = ntp_snippets::GetSelectedCategoryRanker();
switch (choice) {
case CategoryRankerChoice::CONSTANT:
return base::MakeUnique<ConstantCategoryRanker>();
case CategoryRankerChoice::CLICK_BASED:
return base::MakeUnique<ClickBasedCategoryRanker>(pref_service,
std::move(clock));
}
return nullptr;
}
const base::Feature kCategoryOrder{"ContentSuggestionsCategoryOrder",
base::FEATURE_DISABLED_BY_DEFAULT};
const char kCategoryOrderParameter[] = "category_order";
const char kCategoryOrderGeneral[] = "general";
const char kCategoryOrderEmergingMarketsOriented[] =
"emerging_markets_oriented";
CategoryOrderChoice GetSelectedCategoryOrder() {
if (!base::FeatureList::IsEnabled(kCategoryOrder)) {
return CategoryOrderChoice::GENERAL;
}
std::string category_order_value =
variations::GetVariationParamValueByFeature(kCategoryOrder,
kCategoryOrderParameter);
if (category_order_value.empty()) {
// Enabled with no parameters.
return CategoryOrderChoice::GENERAL;
}
if (category_order_value == kCategoryOrderGeneral) {
return CategoryOrderChoice::GENERAL;
}
if (category_order_value == kCategoryOrderEmergingMarketsOriented) {
return CategoryOrderChoice::EMERGING_MARKETS_ORIENTED;
}
LOG(DFATAL) << "The " << kCategoryOrderParameter << " parameter value is '"
<< category_order_value << "'";
return CategoryOrderChoice::GENERAL;
}
} // namespace ntp_snippets
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