File cancellable.h¶

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// Copyright (c) 2024, The Endstone Project. (https://endstone.dev) All Rights Reserved.
//
// 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

namespace endstone {

class ICancellable {
public:
    virtual ~ICancellable() = default;
    [[nodiscard]] virtual bool isCancelled() const = 0;
    virtual void setCancelled(bool cancel) = 0;
    virtual void cancel() = 0;
};

template <typename EventType>
class Cancellable : public EventType, public ICancellable {
public:
    using EventType::EventType;

    [[nodiscard]] bool isCancelled() const final
    {
        return EventType::cancelled_;
    }

    void setCancelled(bool cancel) final
    {
        EventType::cancelled_ = cancel;
    }

    void cancel() final
    {
        setCancelled(true);
    }

private:
    [[nodiscard]] bool isCancellable() const final
    {
        return true;
    }
};
}  // namespace endstone