MileageFileHandler.cpp

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#include "MileageFileHandler.hpp"
#include <QDebug>

MileageFileHandler::MileageFileHandler(const QString &filePath,
                                       FileOpenFunc openFunc,
                                       FileReadFunc readFunc,
                                       FileWriteFunc writeFunc,
                                       FileExistsFunc existsFunc)
    : filePath(filePath)
    , openFunc(openFunc)
    , readFunc(readFunc)
    , writeFunc(writeFunc)
    , existsFunc(existsFunc)
{
    ensureFileExists();
}

void MileageFileHandler::ensureFileExists() const
{
    if (!existsFunc(filePath)) {
        QFile file(filePath);
        if (openFunc(file, QIODevice::WriteOnly | QIODevice::Text)) {
            if (!writeFunc(file, "0.0")) {
                qWarning() << "Failed to initialize mileage file with default value.";
            }
            file.close();
            qDebug() << "Mileage file created at:" << filePath;
        } else {
            qWarning() << "Failed to create mileage file at:" << filePath;
        }
    }
}

double MileageFileHandler::readMileage() const
{
    QFile file(filePath);
    if (!openFunc(file, QIODevice::ReadOnly | QIODevice::Text)) {
        qWarning() << "Failed to open mileage file for reading:" << filePath;
        return 0.0;
    }
 
    QString content = readFunc(file);
    file.close();
 
    bool ok = false;
    double mileage = content.toDouble(&ok);
    if (!ok) {
        qWarning() << "Invalid mileage value in file. Defaulting to 0.";
        return 0.0;
    }
    return mileage;
}

void MileageFileHandler::writeMileage(double mileage) const
{
    QFile file(filePath);
    if (!openFunc(file, QIODevice::WriteOnly | QIODevice::Text)) {
        qWarning() << "Failed to open mileage file for writing:" << filePath;
        return;
    }
 
    bool success = writeFunc(file, QString::number(mileage, 'f', 2));
    if (!success) {
        qWarning() << "Failed to write mileage data.";
    }
    file.close();
}