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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_SHARING_MESSAGE_SHARING_DEVICE_SOURCE_H_
#define COMPONENTS_SHARING_MESSAGE_SHARING_DEVICE_SOURCE_H_
#include <memory>
#include <optional>
#include <string>
#include <vector>
#include "base/functional/callback_forward.h"
#include "components/sharing_message/sharing_target_device_info.h"
#include "components/sync/protocol/device_info_specifics.pb.h"
class SharingDeviceSource {
public:
SharingDeviceSource();
SharingDeviceSource(const SharingDeviceSource&) = delete;
SharingDeviceSource& operator=(const SharingDeviceSource&) = delete;
virtual ~SharingDeviceSource();
// Returns if the source is ready. Calling GetAllDevices before this is true
// returns an empty list.
virtual bool IsReady() = 0;
// Returns the device matching |guid| or nullopt if no match was found.
virtual std::optional<SharingTargetDeviceInfo> GetDeviceByGuid(
const std::string& guid) = 0;
// Returns all device candidates for |required_feature|. Internally filters
// out older devices and returns them in (not strictly) decreasing order of
// last updated timestamp.
virtual std::vector<SharingTargetDeviceInfo> GetDeviceCandidates(
sync_pb::SharingSpecificFields::EnabledFeatures required_feature) = 0;
// Adds a callback to be run when the SharingDeviceSource is ready. If a
// callback is added when it is already ready, it will be run immediately.
void AddReadyCallback(base::OnceClosure callback);
protected:
void MaybeRunReadyCallbacks();
private:
std::vector<base::OnceClosure> ready_callbacks_;
};
#endif // COMPONENTS_SHARING_MESSAGE_SHARING_DEVICE_SOURCE_H_
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