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/*
* Copyright 2019 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef API_FIELD_TRIALS_VIEW_H_
#define API_FIELD_TRIALS_VIEW_H_
#include <string>
#include "absl/strings/match.h"
#include "absl/strings/string_view.h"
#include "rtc_base/system/rtc_export.h"
namespace webrtc {
// An interface that provides the means to access field trials.
//
// Note that there are no guarantess that the meaning of a particular key-value
// mapping will be preserved over time and no announcements will be made if they
// are changed. It's up to the library user to ensure that the behavior does not
// break.
class RTC_EXPORT FieldTrialsView {
public:
virtual ~FieldTrialsView() = default;
// Returns the configured value for `key` or an empty string if the field
// trial isn't configured.
virtual std::string Lookup(absl::string_view key) const = 0;
bool IsEnabled(absl::string_view key) const {
return absl::StartsWith(Lookup(key), "Enabled");
}
bool IsDisabled(absl::string_view key) const {
return absl::StartsWith(Lookup(key), "Disabled");
}
};
} // namespace webrtc
#endif // API_FIELD_TRIALS_VIEW_H_
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