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#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>

namespace qbs {
namespace Internal {

class File : public QObject, QScriptable
{
    Q_OBJECT
public:
    enum Filter {
        Dirs = 0x001,
        Files = 0x002,
        Drives = 0x004,
        NoSymLinks = 0x008,
        AllEntries = Dirs | Files | Drives,
        TypeMask = 0x00f,

        Readable = 0x010,
        Writable = 0x020,
        Executable = 0x040,
        PermissionMask = 0x070,

        Modified = 0x080,
        Hidden = 0x100,
        System = 0x200,

        AccessMask  = 0x3F0,

        AllDirs = 0x400,
        CaseSensitive = 0x800,
        NoDot = 0x2000,
        NoDotDot = 0x4000,
        NoDotAndDotDot = NoDot | NoDotDot,

        NoFilter = -1
    };
    Q_DECLARE_FLAGS(Filters, Filter)
    Q_ENUM(Filter)

    static QScriptValue js_ctor(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_copy(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_exists(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_directoryEntries(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_lastModified(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_makePath(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_move(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_remove(QScriptContext *context, QScriptEngine *engine);
    static QScriptValue js_canonicalFilePath(QScriptContext *context, QScriptEngine *engine);
};

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

QScriptValue File::js_copy(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 2)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("copy expects 2 arguments"));
    }

    const auto se = static_cast<ScriptEngine *>(engine);
    const DubiousContextList dubiousContexts({
            DubiousContext(EvalContext::PropertyEvaluation),
            DubiousContext(EvalContext::RuleExecution, DubiousContext::SuggestMoving)
    });
    se->checkContext(QStringLiteral("File.copy()"), dubiousContexts);

    const QString sourceFile = context->argument(0).toString();
    const QString targetFile = context->argument(1).toString();
    QString errorMessage;
    if (Q_UNLIKELY(!copyFileRecursion(sourceFile, targetFile, true, true, &errorMessage)))
        return context->throwError(errorMessage);
    return true;
}

QScriptValue File::js_exists(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("exist expects 1 argument"));
    }
    const QString filePath = context->argument(0).toString();
    const bool exists = FileInfo::exists(filePath);
    const auto se = static_cast<ScriptEngine *>(engine);
    se->addFileExistsResult(filePath, exists);
    return exists;
}

QScriptValue File::js_directoryEntries(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 2)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("directoryEntries expects 2 arguments"));
    }

    const auto se = static_cast<ScriptEngine *>(engine);
    const DubiousContextList dubiousContexts({
            DubiousContext(EvalContext::PropertyEvaluation, DubiousContext::SuggestMoving)
    });
    se->checkContext(QStringLiteral("File.directoryEntries()"), dubiousContexts);

    const QString path = context->argument(0).toString();
    const auto filters = static_cast<QDir::Filters>(context->argument(1).toUInt32());
    QDir dir(path);
    const QStringList entries = dir.entryList(filters, QDir::Name);
    se->addDirectoryEntriesResult(path, filters, entries);
    return qScriptValueFromSequence(engine, entries);
}

QScriptValue File::js_remove(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("remove expects 1 argument"));
    }

    const auto se = static_cast<ScriptEngine *>(engine);
    const DubiousContextList dubiousContexts({ DubiousContext(EvalContext::PropertyEvaluation) });
    se->checkContext(QStringLiteral("File.remove()"), dubiousContexts);

    QString fileName = context->argument(0).toString();

    QString errorMessage;
    if (Q_UNLIKELY(!removeFileRecursion(QFileInfo(fileName), &errorMessage)))
        return context->throwError(errorMessage);
    return true;
}

QScriptValue File::js_lastModified(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("File.lastModified() expects an argument"));
    }
    const QString filePath = context->argument(0).toString();
    const FileTime timestamp = FileInfo(filePath).lastModified();
    const auto se = static_cast<ScriptEngine *>(engine);
    se->addFileLastModifiedResult(filePath, timestamp);
    return timestamp.asDouble();
}

QScriptValue File::js_makePath(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 1)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("makePath expects 1 argument"));
    }

    const auto se = static_cast<ScriptEngine *>(engine);
    const DubiousContextList dubiousContexts({ DubiousContext(EvalContext::PropertyEvaluation) });
    se->checkContext(QStringLiteral("File.makePath()"), dubiousContexts);

    return QDir::root().mkpath(context->argument(0).toString());
}

QScriptValue File::js_move(QScriptContext *context, QScriptEngine *engine)
{
    Q_UNUSED(engine);
    if (Q_UNLIKELY(context->argumentCount() < 2)) {
        return context->throwError(QScriptContext::SyntaxError,
                                   Tr::tr("move expects 2 arguments"));
    }

    const auto se = static_cast<ScriptEngine *>(engine);
    const DubiousContextList dubiousContexts({ DubiousContext(EvalContext::PropertyEvaluation) });
    se->checkContext(QStringLiteral("File.move()"), dubiousContexts);

    const QString sourceFile = context->argument(0).toString();
    const QString targetFile = context->argument(1).toString();
    const bool overwrite = context->argumentCount() > 2 ? context->argument(2).toBool() : true;

    if (Q_UNLIKELY(QFileInfo(sourceFile).isDir()))
        return context->throwError(QStringLiteral("Could not move '%1' to '%2': "
                                                         "Source file path is a directory.")
                                   .arg(sourceFile, targetFile));

    if (Q_UNLIKELY(QFileInfo(targetFile).isDir())) {
        return context->throwError(QStringLiteral("Could not move '%1' to '%2': "
                                                         "Destination file path is a directory.")
                                   .arg(sourceFile, targetFile));
    }

    QFile f(targetFile);
    if (overwrite && f.exists() && !f.remove())
        return context->throwError(QStringLiteral("Could not move '%1' to '%2': %3")
                                   .arg(sourceFile, targetFile, f.errorString()));

    if (QFile::exists(targetFile))
        return context->throwError(QStringLiteral("Could not move '%1' to '%2': "
                                                         "Destination file exists.")
                                   .arg(sourceFile, targetFile));

    QFile f2(sourceFile);
    if (Q_UNLIKELY(!f2.rename(targetFile)))
        return context->throwError(QStringLiteral("Could not move '%1' to '%2': %3")
                                   .arg(sourceFile, targetFile, f2.errorString()));
    return true;
}

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

} // namespace Internal
} // namespace qbs

void initializeJsExtensionFile(QScriptValue extensionObject)
{
    using namespace qbs::Internal;
    QScriptEngine *engine = extensionObject.engine();
    QScriptValue fileObj = engine->newQMetaObject(&File::staticMetaObject,
                                                  engine->newFunction(&File::js_ctor));
    fileObj.setProperty(QStringLiteral("copy"), engine->newFunction(File::js_copy));
    fileObj.setProperty(QStringLiteral("exists"), engine->newFunction(File::js_exists));
    fileObj.setProperty(QStringLiteral("directoryEntries"),
                        engine->newFunction(File::js_directoryEntries));
    fileObj.setProperty(QStringLiteral("lastModified"), engine->newFunction(File::js_lastModified));
    fileObj.setProperty(QStringLiteral("makePath"), engine->newFunction(File::js_makePath));
    fileObj.setProperty(QStringLiteral("move"), engine->newFunction(File::js_move));
    fileObj.setProperty(QStringLiteral("remove"), engine->newFunction(File::js_remove));
    fileObj.setProperty(QStringLiteral("canonicalFilePath"),
                        engine->newFunction(File::js_canonicalFilePath));
    extensionObject.setProperty(QStringLiteral("File"), fileObj);
}

Q_DECLARE_METATYPE(qbs::Internal::File *)

#include "file.moc"
