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features.h
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features.h
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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.
#ifndef COMPONENTS_NTP_SNIPPETS_FEATURES_H_
#define COMPONENTS_NTP_SNIPPETS_FEATURES_H_
#include <memory>
#include <string>
#include "base/feature_list.h"
#include "components/ntp_snippets/category_rankers/category_ranker.h"
#include "components/prefs/pref_service.h"
namespace base {
class Clock;
}
namespace ntp_snippets {
//
// Null-terminated list of all features related to content suggestions.
//
// If you add a base::Feature below, you must add it to this list. It is used in
// internal pages to list relevant parameters and settings.
//
extern const base::Feature*(kAllFeatures[]);
// Features to turn individual providers/categories on/off.
// TODO(jkrcal): Rename to kRemoteSuggestionsFeature.
extern const base::Feature kArticleSuggestionsFeature;
extern const base::Feature kBookmarkSuggestionsFeature;
extern const base::Feature kRecentOfflineTabSuggestionsFeature;
extern const base::Feature kPhysicalWebPageSuggestionsFeature;
extern const base::Feature kForeignSessionsSuggestionsFeature;
// Feature to allow UI as specified here: https://crbug.com/660837.
extern const base::Feature kIncreasedVisibility;
// Feature to listen for GCM push updates from the server.
extern const base::Feature kContentSuggestionsPushFeature;
// Feature to choose a category ranker.
extern const base::Feature kCategoryRanker;
// Feature to allow the new Google favicon server for fetching publisher icons.
extern const base::Feature kPublisherFaviconsFromNewServerFeature;
// Feature for simple experimental comparision and validation of changes since
// M58: enabling this brings back the M58 Stable fetching schedule (which is
// suitable for Holdback groups).
// TODO(jkrcal): Remove when the comparision is done (probably after M62).
extern const base::Feature kRemoteSuggestionsEmulateM58FetchingSchedule;
// Parameter and its values for the kCategoryRanker feature flag.
extern const char kCategoryRankerParameter[];
extern const char kCategoryRankerConstantRanker[];
extern const char kCategoryRankerClickBasedRanker[];
enum class CategoryRankerChoice {
CONSTANT,
CLICK_BASED,
};
// Returns which CategoryRanker to use according to kCategoryRanker feature.
CategoryRankerChoice GetSelectedCategoryRanker();
// Builds a CategoryRanker according to kCategoryRanker feature.
std::unique_ptr<CategoryRanker> BuildSelectedCategoryRanker(
PrefService* pref_service,
std::unique_ptr<base::Clock> clock);
// Feature to choose a default category order.
extern const base::Feature kCategoryOrder;
// Parameter and its values for the kCategoryOrder feature flag.
extern const char kCategoryOrderParameter[];
extern const char kCategoryOrderGeneral[];
extern const char kCategoryOrderEmergingMarketsOriented[];
enum class CategoryOrderChoice {
GENERAL,
EMERGING_MARKETS_ORIENTED,
};
// Returns which category order to use according to kCategoryOrder feature.
CategoryOrderChoice GetSelectedCategoryOrder();
// Enables and configures notifications for content suggestions on Android.
extern const base::Feature kNotificationsFeature;
// An integer. The priority of the notification, ranging from -2 (PRIORITY_MIN)
// to 2 (PRIORITY_MAX). Vibrates and makes sound if >= 0.
extern const char kNotificationsPriorityParam[];
constexpr int kNotificationsDefaultPriority = -1;
// "publisher": use article's publisher as notification's text (default).
// "snippet": use article's snippet as notification's text.
// "and_more": use "From $1. Read this article and $2 more." as text.
extern const char kNotificationsTextParam[];
extern const char kNotificationsTextValuePublisher[];
extern const char kNotificationsTextValueSnippet[];
extern const char kNotificationsTextValueAndMore[];
// "true": when Chrome becomes frontmost, leave notifications open.
// "false": automatically dismiss notification when Chrome becomes frontmost.
extern const char kNotificationsKeepWhenFrontmostParam[];
// "true": notifications link to chrome://newtab, with appropriate text.
// "false": notifications link to URL of notifying article.
extern const char kNotificationsOpenToNTPParam[];
// An integer. The maximum number of notifications that will be shown in 1 day.
extern const char kNotificationsDailyLimit[];
constexpr int kNotificationsDefaultDailyLimit = 1;
// An integer. The number of notifications that can be ignored. If the user
// ignores this many notifications or more, we stop sending them.
extern const char kNotificationsIgnoredLimitParam[];
constexpr int kNotificationsIgnoredDefaultLimit = 3;
} // namespace ntp_snippets
#endif // COMPONENTS_NTP_SNIPPETS_FEATURES_H_