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**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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** This file is part of the tools applications of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:GPL-EXCEPT$
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#include "qqmljstypereader_p.h"
#include "qqmljsimportvisitor_p.h"

#include <QtQml/private/qqmljsast_p.h>
#include <QtQml/private/qqmljsengine_p.h>
#include <QtQml/private/qqmljslexer_p.h>
#include <QtQml/private/qqmljsparser_p.h>
#include <QtQml/private/qqmlimportresolver_p.h>

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

QT_BEGIN_NAMESPACE

QQmlJSScope::Ptr QQmlJSTypeReader::operator()()
{
    using namespace QQmlJS::AST;
    const QFileInfo info { m_file };
    QString baseName = info.baseName();
    const QString scopeName = baseName.endsWith(QStringLiteral(".ui")) ? baseName.chopped(3)
                                                                       : baseName;

    QQmlJS::Engine engine;
    QQmlJS::Lexer lexer(&engine);

    const QString lowerSuffix = info.suffix().toLower();
    const bool isESModule = lowerSuffix == QLatin1String("mjs");
    const bool isJavaScript = isESModule || lowerSuffix == QLatin1String("js");

    auto errorResult = [&](){
        QQmlJSScope::Ptr result = QQmlJSScope::create(
                    isJavaScript ? QQmlJSScope::JSLexicalScope : QQmlJSScope::QMLScope);
        result->setInternalName(scopeName);
        return result;
    };

    QFile file(m_file);
    if (!file.open(QFile::ReadOnly))
        return errorResult();

    QString code = QString::fromUtf8(file.readAll());
    file.close();

    lexer.setCode(code, /*line = */ 1, /*qmlMode=*/ !isJavaScript);
    QQmlJS::Parser parser(&engine);

    const bool success = isJavaScript ? (isESModule ? parser.parseModule()
                                                    : parser.parseProgram())
                                      : parser.parse();
    if (!success)
        return errorResult();

    QQmlJS::AST::Node *rootNode = parser.rootNode();
    if (!rootNode)
        return errorResult();

    QQmlJSImportVisitor membersVisitor(m_importer, QFileInfo(m_file).canonicalPath(),
                                       m_qmltypesFiles);
    rootNode->accept(&membersVisitor);
    auto result = membersVisitor.result();
    result->setInternalName(scopeName);
    return result;
}

QT_END_NAMESPACE
