// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you 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 <stddef.h>

#include <memory>

#include <string>

#include <utility>

#include "common/status.h"

#include "util/byte_buffer.h"

namespace doris {

class MessageBodySink {

public:

    virtual ~MessageBodySink() = default;

    virtual Status append(const char* data, size_t size) = 0;

    virtual Status append(const ByteBufferPtr& buf) { return append(buf->ptr, buf->remaining()); }

    // called when all data has been append

    virtual Status finish() { return Status::OK(); }

    // called when read HTTP failed

    virtual void cancel(const std::string& reason) {}

    bool finished() const { return _finished; }

    bool cancelled() const { return _cancelled; }

protected:

    bool _finished = false;

    bool _cancelled = false;

    std::string _cancelled_reason;

};

// write message to a local file

class MessageBodyFileSink : public MessageBodySink {

public:

    MessageBodyFileSink(std::string path) : _path(std::move(path)) {}

    ~MessageBodyFileSink() override;

    Status open();

    Status append(const char* data, size_t size) override;

    Status finish() override;

    void cancel(const std::string& reason) override;

private:

    std::string _path;

    int _fd = -1;

};

} // namespace doris