FileNotifier.h

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// Copyright 2024 libsese
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
 
#pragma once
 
#include "sese/util/ErrorCode.h"
#include "sese/util/Result.h"
 
#include <functional>
#include <memory>
 
namespace sese::system {
 
class FileNotifier final {
public:
    using Ptr = std::unique_ptr<FileNotifier>;
    using OnCreateCallback = std::function<void(std::string_view)>;
    using OnMoveCallback = std::function<void(std::string_view, std::string_view)>;
    using OnModifyCallback = std::function<void(std::string_view)>;
    using OnDeleteCallback = std::function<void(std::string_view)>;
 
    static Ptr create(const std::string &path) noexcept;
 
    static Result<Ptr, ErrorCode> createEx(const std::string &path) noexcept;
 
    ~FileNotifier() noexcept;
 
    void start() const noexcept;
 
    void shutdown() const noexcept;
 
    void setOnCreate(OnCreateCallback &&callback) const noexcept;
 
    void setOnMove(OnMoveCallback &&callback) const noexcept;
 
    void setOnModify(OnModifyCallback &&callback) const noexcept;
 
    void setOnDelete(OnDeleteCallback &&callback) const noexcept;
 
private:
    FileNotifier() = default;
 
    class Impl;
    std::unique_ptr<Impl> impl;
};
} // namespace sese::system