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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/metrics/field_trial_params.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 {
// Holds an experiment ID. So long as the feature is set through a server-side
// variations config, this feature should exist on the client. This ensures that
// the experiment ID is visible in chrome://snippets-internals.
const base::Feature kRemoteSuggestionsBackendFeature{
"NTPRemoteSuggestionsBackend", base::FEATURE_DISABLED_BY_DEFAULT};
// Keep sorted, and keep nullptr at the end.
const base::Feature* const kAllFeatures[] = {
&kArticleSuggestionsExpandableHeader,
&kArticleSuggestionsFeature,
&kBookmarkSuggestionsFeature,
&kBreakingNewsPushFeature,
&kCategoryOrder,
&kCategoryRanker,
&kContentSuggestionsDebugLog,
&kForeignSessionsSuggestionsFeature,
&kIncreasedVisibility,
&kKeepPrefetchedContentSuggestions,
&kNotificationsFeature,
&kPublisherFaviconsFromNewServerFeature,
&kRemoteSuggestionsBackendFeature};
const base::Feature kArticleSuggestionsExpandableHeader{
"NTPArticleSuggestionsExpandableHeader", base::FEATURE_ENABLED_BY_DEFAULT};
const base::Feature kArticleSuggestionsFeature{
"NTPArticleSuggestions", base::FEATURE_ENABLED_BY_DEFAULT};
const base::Feature kBookmarkSuggestionsFeature{
"NTPBookmarkSuggestions", base::FEATURE_ENABLED_BY_DEFAULT};
const base::Feature kIncreasedVisibility{"NTPSnippetsIncreasedVisibility",
base::FEATURE_ENABLED_BY_DEFAULT};
const base::Feature kForeignSessionsSuggestionsFeature{
"NTPForeignSessionsSuggestions", base::FEATURE_DISABLED_BY_DEFAULT};
const base::Feature kBreakingNewsPushFeature{"BreakingNewsPush",
base::FEATURE_DISABLED_BY_DEFAULT};
const base::Feature kCategoryRanker{"ContentSuggestionsCategoryRanker",
base::FEATURE_ENABLED_BY_DEFAULT};
const base::Feature kPublisherFaviconsFromNewServerFeature{
"ContentSuggestionsFaviconsFromNewServer",
base::FEATURE_DISABLED_BY_DEFAULT};
const base::Feature kRemoteSuggestionsEmulateM58FetchingSchedule{
"RemoteSuggestionsEmulateM58FetchingSchedule",
base::FEATURE_DISABLED_BY_DEFAULT};
const char kCategoryRankerParameter[] = "category_ranker";
const char kCategoryRankerConstantRanker[] = "constant";
const char kCategoryRankerClickBasedRanker[] = "click_based";
CategoryRankerChoice GetSelectedCategoryRanker(bool is_chrome_home_enabled) {
std::string category_ranker_value =
variations::GetVariationParamValueByFeature(kCategoryRanker,
kCategoryRankerParameter);
if (category_ranker_value.empty()) {
// Default, Enabled or Disabled.
if (is_chrome_home_enabled) {
return CategoryRankerChoice::CONSTANT;
}
return CategoryRankerChoice::CLICK_BASED;
}
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,
base::Clock* clock,
bool is_chrome_home_enabled) {
CategoryRankerChoice choice =
ntp_snippets::GetSelectedCategoryRanker(is_chrome_home_enabled);
switch (choice) {
case CategoryRankerChoice::CONSTANT:
return std::make_unique<ConstantCategoryRanker>();
case CategoryRankerChoice::CLICK_BASED:
return std::make_unique<ClickBasedCategoryRanker>(pref_service, 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::EMERGING_MARKETS_ORIENTED;
}
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;
}
const base::Feature kNotificationsFeature = {"ContentSuggestionsNotifications",
base::FEATURE_DISABLED_BY_DEFAULT};
const char kNotificationsPriorityParam[] = "priority";
const char kNotificationsTextParam[] = "text";
const char kNotificationsTextValuePublisher[] = "publisher";
const char kNotificationsTextValueSnippet[] = "snippet";
const char kNotificationsTextValueAndMore[] = "and_more";
const char kNotificationsKeepWhenFrontmostParam[] =
"keep_notification_when_frontmost";
const char kNotificationsOpenToNTPParam[] = "open_to_ntp";
const char kNotificationsDailyLimit[] = "daily_limit";
const char kNotificationsIgnoredLimitParam[] = "ignored_limit";
const base::Feature kKeepPrefetchedContentSuggestions{
"KeepPrefetchedContentSuggestions", base::FEATURE_DISABLED_BY_DEFAULT};
const base::Feature kContentSuggestionsDebugLog{
"ContentSuggestionsDebugLog", base::FEATURE_DISABLED_BY_DEFAULT};
std::vector<const base::Feature*> GetAllFeatures() {
// Skip the last feature as it's a nullptr.
return std::vector<const base::Feature*>(
kAllFeatures, kAllFeatures + arraysize(kAllFeatures));
}
// Default referrer for the content suggestions.
const char kDefaultReferrerUrl[] = "https://discover.google.com/";
// Provides ability to customize the referrer URL.
// When specifying a referrer through a field trial, it must contain a path.
// In case of default value above the path is empty, but it is specified.
base::FeatureParam<std::string> kArticleSuggestionsReferrerURLParam{
&kArticleSuggestionsFeature, "referrer_url", kDefaultReferrerUrl};
std::string GetContentSuggestionsReferrerURL() {
return kArticleSuggestionsReferrerURLParam.Get();
}
} // namespace ntp_snippets
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