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#include "settingsrepresentation.h"

#include "jsliterals.h"

#include <language/scriptengine.h>
#include <logging/logger.h>

namespace qbs {

QString settingsValueToRepresentation(const QVariant &value)
{
    return toJSLiteral(value);
}

static QVariant variantFromString(const QString &str, bool &ok)
{
    // ### use Qt5's JSON reader at some point.
    class DummyLogSink : public ILogSink {
        void doPrintMessage(LoggerLevel, const QString &, const QString &) override { }
    } logSink;
    Internal::Logger logger(&logSink);

    const auto engine = Internal::ScriptEngine::create(logger, {});
    Internal::ScopedJsValue sv(
                engine->context(),
                engine->evaluate(Internal::JsValueOwner::Caller,
                                 QLatin1String("(function(){return ") + str
                                 + QLatin1String(";})()")));
    ok = !engine->checkForJsError({});
    return Internal::getJsVariant(engine->context(), sv);
}

QVariant representationToSettingsValue(const QString &representation)
{
    bool ok;
    QVariant variant = variantFromString(representation, ok);

    // We have no floating-point properties, so this is most likely intended to be a string.
    if (static_cast<QMetaType::Type>(variant.userType()) == QMetaType::Float
            || static_cast<QMetaType::Type>(variant.userType()) == QMetaType::Double) {
        variant = variantFromString(QLatin1Char('"') + representation + QLatin1Char('"'), ok);
    }

    if (ok)
        return variant;

    // If it's not valid JavaScript, interpret the value as a string.
    return representation;
}

} // namespace qbs
