qt-everywhere-src-5.14.1/qtvirtualkeyboard/tests/manual/x11vkbtest/filehelper.cpp

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** Contact: https://www.qt.io/licensing/
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** This file is part of the Qt Virtual Keyboard module of the Qt Toolkit.
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#include <QFile>
#include <QTextStream>
#include <QLoggingCategory>
#include <QJsonDocument>
#include <QJsonObject>
#include <fstream>

#include "filehelper.h"

Q_LOGGING_CATEGORY(lcFileHelper, "qt.virtualkeyboard.tests.manual.x11vkbtest.filehelper")

bool FileHelper::fileExists(const QString &fileName)
{
    std::ifstream stream(fileName.toLatin1());
    return stream.good();
}


QString FileHelper::getFileContext(const QString &fileName)
{
    QString result = "";
    QFile file(fileName);

    if (!(!file.open(QFile::ReadOnly | QFile::Text))) {
        QTextStream in(&file);
        result = in.readAll();
        file.close();
    }

    return result;
}

bool FileHelper::getJsonFromFile(const QString &fileName, std::map<QString, QVariant> &jsonMap)
{
    bool result = true;

    if (!fileExists(fileName)) {
        qCDebug(lcFileHelper) << "File:" << fileName << "doesn't exist";
        result = false;
    } else {
        QString jsonString = FileHelper::getFileContext(fileName);
        QByteArray jsonBytes = jsonString.toLocal8Bit();

        auto jsonDoc = QJsonDocument::fromJson(jsonBytes);

        if (jsonDoc.isNull()) {
            qCDebug(lcFileHelper) << "jsonDoc is Null";
            result = false;
        } else if (!jsonDoc.isObject()) {
            qCDebug(lcFileHelper) << "jsonDoc is NOT an object";
            result = false;
        } else {
            QJsonObject jsonObj = jsonDoc.object();

            if (jsonObj.isEmpty()) {
                qCDebug(lcFileHelper) << "jsonObj is Empty";
                result = false;
            } else {
                auto jsonIter = jsonObj.constBegin();
                jsonMap.insert({jsonIter.key(), jsonIter.value()});
            }
        }
    }
    return result;
}