///////////////////////////////////////////////////////////////////////////////////
//   Copyright 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.            //
//   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.                                              //
///////////////////////////////////////////////////////////////////////////////////

#include "servo_pkg/utility.hpp"


namespace PWM {
    /// Check's if the desired file exist
    /// @returns True if file exist, false otherwise
    /// @param filePath Full path to desired file for which to validate existence
    bool checkFile(const std::string &filePath) {
        int fd = open(filePath.c_str(), O_RDONLY);
        close(fd);
        return fd >= 0;
    }

    /// Writes the given calibration map to file
    /// @param jsonValue json value to write to file
    /// @param filePath Full path to the desired file for which to write the given json.
    void writeJSONToFile(Json::Value jsonValue, const std::string &filePath) {
        // Write to file
        Json::StreamWriterBuilder builder;
        builder["commentStyle"] = "None";
        builder["indentation"] = "   ";

        std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
        std::ofstream ofs(filePath);
        writer->write(jsonValue, &ofs);
    }
}