Yaml.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/io/InputStream.h>
#include <sese/io/OutputStream.h>
#include <sese/util/Value.h>
 
#include <queue>
#include <stack>
#include <tuple>
 
namespace sese {
class Yaml final : public NotInstantiable {
    using Tokens = std::vector<std::string>;
    using TokensQueue = std::queue<std::tuple<int, Tokens>>;
    using InputStream = io::InputStream;
    using OutputStream = io::OutputStream;
    using Line = std::tuple<int, std::string>;
 
    using ParseStack = std::stack<std::pair<Value *, int>>;
    using StreamifyStack = std::stack<std::tuple<Value *, unsigned int, unsigned int, bool>>;
    using StreamifyIterStack = std::stack<std::map<std::string, std::shared_ptr<Value>>::iterator>;
 
    static Value parseBasic(const std::string &value);
 
    static bool parseObject(
        TokensQueue &tokens_queue,
        ParseStack &stack
    );
 
    static bool parseArray(
        TokensQueue &tokens_queue,
        ParseStack &stack
    );
 
    static bool streamifyObject(
        OutputStream *output,
        StreamifyStack &stack,
        StreamifyIterStack &map_iter_stack
    );
 
    static bool streamifyArray(
        OutputStream *output,
        StreamifyStack &stack,
        StreamifyIterStack &map_iter_stack
    );
 
    static bool streamifyBasic(OutputStream *output, const std::shared_ptr<Value> &value);
 
    static int getSpaceCount(const std::string &line) noexcept;
 
    static Line getLine(InputStream *input) noexcept;
 
    static Tokens tokenizer(const std::string &line) noexcept;
 
    static bool writeSpace(OutputStream *output, size_t count) noexcept;
 
public:
    Yaml() = delete;
 
    static Value parse(io::InputStream *input);
 
    static bool streamify(io::OutputStream *output, Value &value);
};
} // namespace sese