JsonParser.hpp

/*
 * Copyright 2010-2016 Amazon.com, Inc. or its affiliates. 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.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.
 */

/**
 * @file JsonParser.hpp
 * @brief
 *
 */

#pragma once

#include <cstdint>
#include <rapidjson/document.h>

#include "util/memory/stl/String.hpp"
#include "ResponseCode.hpp"

#define MAX_CONFIG_FILE_SIZE_BYTES 4096 //Increase if adding more configuration options

namespace awsiotsdk {
    namespace util {
        using JsonDocument = rapidjson::Document;
        using JsonValue = rapidjson::Value;

        class JsonParser {
        public:
            static ResponseCode InitializeFromJsonFile(JsonDocument &json_document,
                                                       const util::String &input_file_path);

            static ResponseCode InitializeFromJsonString(JsonDocument &json_document,
                                                         const util::String &input_json_string);

            static ResponseCode GetBoolValue(const JsonDocument &json_document, const char *key, bool &value);

            static ResponseCode GetIntValue(const JsonDocument &json_document, const char *key, int &value);

            static ResponseCode GetUint16Value(const JsonDocument &json_document, const char *key,
                                               uint16_t &value);

            static ResponseCode GetUint32Value(const JsonDocument &json_document, const char *key,
                                               uint32_t &value);

            static ResponseCode GetSizeTValue(const JsonDocument &json_document, const char *key, size_t &value);

            static ResponseCode GetCStringValue(const JsonDocument &json_document, const char *key, char *value,
                                                uint16_t max_string_len);

            static ResponseCode GetStringValue(const JsonDocument &json_document, const char *key,
                                               util::String &value);

            static rapidjson::ParseErrorCode GetParseErrorCode(const JsonDocument &json_document);

            static size_t GetParseErrorOffset(const JsonDocument &json_document);

            static ResponseCode MergeValues(JsonValue &target, JsonValue &source, JsonValue::AllocatorType &allocator);

            static ResponseCode DiffValues(JsonValue &target_doc,
                                           JsonValue &old_doc,
                                           JsonValue &new_doc,
                                           JsonValue::AllocatorType &allocator);

            static util::String ToString(JsonDocument &json_document);

            static util::String ToString(JsonValue &json_value);

            static ResponseCode WriteToFile(JsonDocument &json_document, const util::String &output_file_path);
        };
    }
}