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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 CHROME_BROWSER_NOTIFICATIONS_SCHEDULER_INTERNAL_COLLECTION_STORE_H_
#define CHROME_BROWSER_NOTIFICATIONS_SCHEDULER_INTERNAL_COLLECTION_STORE_H_
#include <memory>
#include <string>
#include <vector>
#include "base/functional/callback.h"
namespace notifications {
// A storage interface which loads a collection of data type T into memory
// during initialization. When updating the data, T will be copied to the actual
// storage layer since the caller will keep in memory data as well.
template <typename T>
class CollectionStore {
public:
using Entries = std::vector<std::unique_ptr<T>>;
using LoadCallback = base::OnceCallback<void(bool, Entries)>;
using InitCallback = base::OnceCallback<void(bool)>;
using UpdateCallback = base::OnceCallback<void(bool)>;
// Initializes the database and loads all entries into memory.
virtual void InitAndLoad(LoadCallback callback) = 0;
// Adds an entry to the storage.
virtual void Add(const std::string& key,
const T& entry,
UpdateCallback callback) = 0;
// Updates an entry.
virtual void Update(const std::string& key,
const T& entry,
UpdateCallback callback) = 0;
// Deletes an entry from storage.
virtual void Delete(const std::string& key, UpdateCallback callback) = 0;
CollectionStore() = default;
CollectionStore(const CollectionStore&) = delete;
CollectionStore& operator=(const CollectionStore&) = delete;
virtual ~CollectionStore() = default;
};
} // namespace notifications
#endif // CHROME_BROWSER_NOTIFICATIONS_SCHEDULER_INTERNAL_COLLECTION_STORE_H_
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