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- // Copyright 2018 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 SERVICES_DEVICE_GEOLOCATION_POSITION_CACHE_H_
- #define SERVICES_DEVICE_GEOLOCATION_POSITION_CACHE_H_
- #include <cstddef>
- namespace device {
- namespace mojom {
- class Geoposition;
- } // namespace mojom
- struct WifiData;
- // Cache of recently resolved locations, keyed by the set of unique WiFi APs
- // used in the network query.
- class PositionCache {
- public:
- virtual ~PositionCache() = default;
- // Caches the current position response for the current set of cell ID and
- // WiFi data. In the case of the cache exceeding an implementation-defined
- // maximum size this will evict old entries in FIFO orderer of being added.
- virtual void CachePosition(const WifiData& wifi_data,
- const mojom::Geoposition& position) = 0;
- // Searches for a cached position response for the current set of data.
- // Returns nullptr if the position is not in the cache, or the cached
- // position if available. Ownership remains with the cache. Do not store
- // the pointer, treat it as an iterator into the cache's internals.
- virtual const mojom::Geoposition* FindPosition(
- const WifiData& wifi_data) const = 0;
- // Returns the number of cached position responses stored in the cache.
- virtual size_t GetPositionCacheSize() const = 0;
- // Returns most recently used position, or an invalid Geoposition if
- // SetLastUsedNetworkPosition wasn't called yet.
- virtual const mojom::Geoposition& GetLastUsedNetworkPosition() const = 0;
- // Stores the most recently used position.
- virtual void SetLastUsedNetworkPosition(
- const mojom::Geoposition& position) = 0;
- };
- } // namespace device
- #endif // SERVICES_DEVICE_GEOLOCATION_POSITION_CACHE_H_
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