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// Copyright 2017 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_FEATURE_ENGAGEMENT_INTERNAL_EVENT_MODEL_IMPL_H_
#define COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_EVENT_MODEL_IMPL_H_
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "components/feature_engagement/internal/event_model.h"
#include "components/feature_engagement/internal/proto/feature_event.pb.h"
namespace feature_engagement {
class EventStorageValidator;
class EventStore;
// A EventModelImpl provides the default implementation of the EventModel.
class EventModelImpl : public EventModel {
public:
EventModelImpl(std::unique_ptr<EventStore> store,
std::unique_ptr<EventStorageValidator> storage_validator);
~EventModelImpl() override;
// EventModel implementation.
void Initialize(OnModelInitializationFinished callback,
uint32_t current_day) override;
bool IsReady() const override;
const Event* GetEvent(const std::string& event_name) const override;
uint32_t GetEventCount(const std::string& event_name,
uint32_t current_day,
uint32_t window_size) const override;
void IncrementEvent(const std::string& event_name,
uint32_t current_day) override;
private:
// Callback for loading the underlying store.
void OnStoreLoaded(OnModelInitializationFinished callback,
uint32_t current_day,
bool success,
std::unique_ptr<std::vector<Event>> events);
// Internal version for getting the non-const version of a stored Event.
// Creates the event if it is not already stored.
Event& GetNonConstEvent(const std::string& event_name);
// The underlying store for all events.
std::unique_ptr<EventStore> store_;
// A utility for checking whether new events should be stored and for whether
// old events should be kept.
std::unique_ptr<EventStorageValidator> storage_validator_;
// An in-memory representation of all events.
std::map<std::string, Event> events_;
// Whether the model has been fully initialized.
bool ready_;
base::WeakPtrFactory<EventModelImpl> weak_factory_{this};
DISALLOW_COPY_AND_ASSIGN(EventModelImpl);
};
} // namespace feature_engagement
#endif // COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_EVENT_MODEL_IMPL_H_
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