mirror of
https://github.com/kidfromjupiter/nearby.git
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79 lines
2.4 KiB
C++
79 lines
2.4 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef CORE_MEDIUM_SELECTOR_H_
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#define CORE_MEDIUM_SELECTOR_H_
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#include "proto/connections_enums.pb.h"
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namespace location {
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namespace nearby {
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namespace connections {
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using Medium = location::nearby::proto::connections::Medium;
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// Generic type: allows definition of a feature T for every Medium.
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template <typename T>
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struct MediumSelector {
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T bluetooth;
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T ble;
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T web_rtc;
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T wifi_lan;
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constexpr MediumSelector() = default;
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constexpr MediumSelector(const MediumSelector&) = default;
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constexpr MediumSelector& operator=(const MediumSelector&) = default;
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constexpr bool Any(T value) const {
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return bluetooth == value || ble == value || web_rtc == value ||
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wifi_lan == value;
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}
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constexpr bool All(T value) const {
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return bluetooth == value && ble == value && web_rtc == value &&
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wifi_lan == value;
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}
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constexpr int Count(T value) const {
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int count = 0;
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if (bluetooth == value) count++;
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if (ble == value) count++;
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if (wifi_lan == value) count++;
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if (web_rtc == value) count++;
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return count;
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}
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constexpr MediumSelector& SetAll(T value) {
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bluetooth = value;
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ble = value;
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web_rtc = value;
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wifi_lan = value;
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return *this;
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}
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std::vector<Medium> GetMediums(T value) const {
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std::vector<Medium> mediums;
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// Mediums are sorted in order of decreasing preference.
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if (wifi_lan == value) mediums.push_back(Medium::WIFI_LAN);
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if (web_rtc == value) mediums.push_back(Medium::WEB_RTC);
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if (bluetooth == value) mediums.push_back(Medium::BLUETOOTH);
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if (ble == value) mediums.push_back(Medium::BLE);
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return mediums;
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}
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};
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} // namespace connections
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} // namespace nearby
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} // namespace location
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#endif // CORE_MEDIUM_SELECTOR_H_
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