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#include "jsextensions_p.h"

#include <language/scriptengine.h>
#include <logging/translator.h>
#include <tools/fileinfo.h>

#include <QtCore/qdir.h>
#include <QtCore/qfileinfo.h>

#include <QtScript/qscriptable.h>
#include <QtScript/qscriptengine.h>

#include <regex>

namespace qbs {
namespace Internal {

class FileInfoExtension : public QObject, QScriptable
{
    Q_OBJECT
public:
    static QScriptValue js_ctor(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_path(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_fileName(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_baseName(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_cleanPath(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_completeBaseName(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_relativePath(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_resolvePath(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_isAbsolutePath(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_toWindowsSeparators(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_fromWindowsSeparators(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_toNativeSeparators(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_fromNativeSeparators(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_joinPaths(QScriptContext *context, QScriptEngine *engine);
};

static void initializeJsExtensionFileInfo(QScriptValue extensionObject)
{
    QScriptEngine *engine = extensionObject.engine();
    QScriptValue fileInfoObj = engine->newQMetaObject(&FileInfoExtension::staticMetaObject,
                                                  engine->newFunction(&FileInfoExtension::js_ctor));
    fileInfoObj.setProperty(QLatin1String("path"),
                            engine->newFunction(FileInfoExtension::js_path));
    fileInfoObj.setProperty(QLatin1String("fileName"),
                            engine->newFunction(FileInfoExtension::js_fileName));
    fileInfoObj.setProperty(QLatin1String("baseName"),
                            engine->newFunction(FileInfoExtension::js_baseName));
    fileInfoObj.setProperty(QLatin1String("cleanPath"),
                            engine->newFunction(FileInfoExtension::js_cleanPath));
    fileInfoObj.setProperty(QLatin1String("completeBaseName"),
                            engine->newFunction(FileInfoExtension::js_completeBaseName));
    fileInfoObj.setProperty(QLatin1String("relativePath"),
                            engine->newFunction(FileInfoExtension::js_relativePath));
    fileInfoObj.setProperty(QLatin1String("resolvePath"),
                            engine->newFunction(FileInfoExtension::js_resolvePath));
    fileInfoObj.setProperty(QLatin1String("isAbsolutePath"),
                            engine->newFunction(FileInfoExtension::js_isAbsolutePath));
    fileInfoObj.setProperty(QLatin1String("toWindowsSeparators"),
                            engine->newFunction(FileInfoExtension::js_toWindowsSeparators));
    fileInfoObj.setProperty(QLatin1String("fromWindowsSeparators"),
                            engine->newFunction(FileInfoExtension::js_fromWindowsSeparators));
    fileInfoObj.setProperty(QLatin1String("toNativeSeparators"),
                            engine->newFunction(FileInfoExtension::js_toWindowsSeparators));
    fileInfoObj.setProperty(QLatin1String("fromNativeSeparators"),
                            engine->newFunction(FileInfoExtension::js_fromWindowsSeparators));
    fileInfoObj.setProperty(QLatin1String("joinPaths"),
                            engine->newFunction(FileInfoExtension::js_joinPaths));
    extensionObject.setProperty(QLatin1String("FileInfo"), fileInfoObj);
}

QBS_JSEXTENSION_REGISTER(FileInfo, &initializeJsExtensionFileInfo)

QScriptValue FileInfoExtension::js_ctor(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    return context->throwError(Tr::tr("'FileInfo' cannot be instantiated."));
}

QScriptValue FileInfoExtension::js_path(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("path expects 1 argument"));
    }
    HostOsInfo::HostOs hostOs = HostOsInfo::hostOs();
    if (context->argumentCount() > 1) {
        hostOs = context->argument(1).toVariant().toStringList().contains(QLatin1String("windows"))
                ? HostOsInfo::HostOsWindows : HostOsInfo::HostOsOtherUnix;
    }
    return FileInfo::path(context->argument(0).toString(), hostOs);
}

QScriptValue FileInfoExtension::js_fileName(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("fileName expects 1 argument"));
    }
    return FileInfo::fileName(context->argument(0).toString());
}

QScriptValue FileInfoExtension::js_baseName(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("baseName expects 1 argument"));
    }
    return FileInfo::baseName(context->argument(0).toString());
}

QScriptValue FileInfoExtension::js_cleanPath(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("cleanPath expects 1 argument"));
    }
    return QDir::cleanPath(context->argument(0).toString());
}

QScriptValue FileInfoExtension::js_completeBaseName(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("completeBaseName expects 1 argument"));
    }
    return FileInfo::completeBaseName(context->argument(0).toString());
}

QScriptValue FileInfoExtension::js_relativePath(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("relativePath expects 2 arguments"));
    }
    const QString baseDir = context->argument(0).toString();
    const QString filePath = context->argument(1).toString();
    if (!FileInfo::isAbsolute(baseDir)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("FileInfo.relativePath() expects an absolute path as "
                                          "its first argument, but it is '%1'.").arg(baseDir));
    }
    if (!FileInfo::isAbsolute(filePath)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("FileInfo.relativePath() expects an absolute path as "
                                          "its second argument, but it is '%1'.").arg(filePath));
    }
    return QDir(baseDir).relativeFilePath(filePath);
}

QScriptValue FileInfoExtension::js_resolvePath(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("resolvePath expects 2 arguments"));
    }
    const QString base = context->argument(0).toString();
    const QString rel = context->argument(1).toString();
    return FileInfo::resolvePath(base, rel);
}

QScriptValue FileInfoExtension::js_isAbsolutePath(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("isAbsolutePath expects 1 argument"));
    }
    HostOsInfo::HostOs hostOs = HostOsInfo::hostOs();
    if (context->argumentCount() > 1) {
        hostOs = context->argument(1).toVariant().toStringList().contains(QLatin1String("windows"))
                ? HostOsInfo::HostOsWindows : HostOsInfo::HostOsOtherUnix;
    }
    return FileInfo::isAbsolute(context->argument(0).toString(), hostOs);
}

QScriptValue FileInfoExtension::js_toWindowsSeparators(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("toWindowsSeparators expects 1 argument"));
    }
    return context->argument(0).toString().replace(QLatin1Char('/'), QLatin1Char('\\'));
}

QScriptValue FileInfoExtension::js_fromWindowsSeparators(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("fromWindowsSeparators expects 1 argument"));
    }
    return context->argument(0).toString().replace(QLatin1Char('\\'), QLatin1Char('/'));
}

QScriptValue FileInfoExtension::js_toNativeSeparators(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("toNativeSeparators expects 1 argument"));
    }
    return QDir::toNativeSeparators(context->argument(0).toString());
}

QScriptValue FileInfoExtension::js_fromNativeSeparators(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("fromNativeSeparators expects 1 argument"));
    }
    return QDir::fromNativeSeparators(context->argument(0).toString());
}

QScriptValue FileInfoExtension::js_joinPaths(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    QStringList paths;
    for (int i = 0; i < context->argumentCount(); ++i) {
        const QScriptValue value = context->argument(i);
        if (!value.isUndefined() && !value.isNull()) {
            const QString arg = value.toString();
            if (!arg.isEmpty())
                paths.append(arg);
        }
    }
    return engine->toScriptValue(QString::fromStdString(
                                     std::regex_replace(paths.join(QLatin1Char('/')).toStdString(),
                                                        std::regex("/{2,}"), "/")));
}

} // namespace Internal
} // namespace qbs

Q_DECLARE_METATYPE(qbs::Internal::FileInfoExtension *)

#include "fileinfoextension.moc"
