util.cpp

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/

#include "util.h"
#include <stdexcept>
#include <QString>
#include <QApplication>
#include <QTranslator>
#include <QLocale>
#include <QTime>
#include <QSettings>
#include <QUrl>
#include <QAction>
#include <QBuffer>
#include <QAction>
#include <QModelIndexList>
#include <QtDebug>
#include <util/sll/qtutil.h>

namespace LC::Util
{
    const QString LCLowercase = QStringLiteral ("leechcraft");

    QString GetAsBase64Src (const QImage& pix)
    {
        QBuffer buf;
        buf.open (QIODevice::ReadWrite);
        const auto compression = 100;
        pix.save (&buf, "PNG", compression);
        return QStringLiteral ("data:image/png;base64,") + buf.buffer ().toBase64 ();
    }

    namespace
    {
        QString MakePrettySizeWith (qint64 sourceSize, const QStringList& units, const QString& space)
        {
            int strNum = 0;
            long double size = sourceSize;

            for (; strNum < 3 && size >= 1024; ++strNum, size /= 1024)
                ;

            return GetLocale ().toString (static_cast<double> (size), 'f', 1) + space + units.value (strNum);
        }
    }

    QString MakePrettySize (qint64 sourcesize)
    {
        static QStringList units
        {
            QObject::tr ("B", "The unit for bytes."),
            QObject::tr ("KiB", "The unit for kilobytes."),
            QObject::tr ("MiB", "The unit for megabytes."),
            QObject::tr ("GiB", "The unit for gigabytes.")
        };

        return MakePrettySizeWith (sourcesize, units, " "_qs);
    }

    QString MakePrettySizeShort (qint64 sourcesize)
    {
        static const QStringList units
        {
            QObject::tr ("B", "Short one-character unit for bytes."),
            QObject::tr ("K", "Short one-character unit for kilobytes."),
            QObject::tr ("M", "Short one-character unit for megabytes."),
            QObject::tr ("G", "Short one-character unit for gigabytes.")
        };

        return MakePrettySizeWith (sourcesize, units, {});
    }

    QString MakeTimeFromLong (ulong time)
    {
        const auto secsPerDay = 86400;
        int d = time / secsPerDay;
        time -= d * secsPerDay;
        QString result;
        if (d)
            result += QObject::tr ("%n day(s), ", "", d);
        result += QTime (0, 0, 0).addSecs (time).toString ();
        return result;
    }

    QTranslator* LoadTranslator (const QString& baseName,
            const QString& localeName,
            const QString& prefix,
            const QString& appName)
    {
        auto filename = prefix;
        filename.append ("_");
        if (!baseName.isEmpty ())
            filename.append (baseName).append ("_");
        filename.append (localeName);

        auto transl = new QTranslator;
    #ifdef Q_OS_WIN32
        Q_UNUSED (appName)
        if (transl->load (filename, ":/") ||
                transl->load (filename,
                        QCoreApplication::applicationDirPath () + "/translations"))
    #elif defined (Q_OS_MAC) && !defined (USE_UNIX_LAYOUT)
        Q_UNUSED (appName)
        if (transl->load (filename, ":/") ||
                transl->load (filename,
                        QCoreApplication::applicationDirPath () + "/../Resources/translations"))
    #elif defined (INSTALL_PREFIX)
        if (transl->load (filename, ":/") ||
                transl->load (filename,
                        QString (INSTALL_PREFIX "/share/%1/translations").arg (appName)))
    #else
        if (transl->load (filename, ":/") ||
                transl->load (filename,
                        QString ("/usr/local/share/%1/translations").arg (appName)) ||
                transl->load (filename,
                        QString ("/usr/share/%1/translations").arg (appName)))
    #endif
            return transl;

        delete transl;

        return nullptr;
    }

    QTranslator* InstallTranslator (const QString& baseName,
            const QString& prefix,
            const QString& appName)
    {
        const auto& localeName = GetLocaleName ();
        if (auto transl = LoadTranslator (baseName, localeName, prefix, appName))
        {
            QCoreApplication::installTranslator (transl);
            return transl;
        }

        qWarning () << Q_FUNC_INFO
                << "could not load translation file for locale"
                << localeName
                << baseName
                << prefix
                << appName;
        return nullptr;
    }

    QLocale GetLocale ()
    {
        const QSettings settings { QCoreApplication::organizationName (), QCoreApplication::applicationName () };
        const auto& localeName = settings.value ("Language"_qs, "system"_qs).toString ();
        if (localeName == "system"_ql)
            return QLocale {};

        QLocale locale { localeName };
        if (locale.language () == QLocale::AnyLanguage)
        {
            qWarning () << "unable to parse" << localeName;
            return QLocale {};
        }
        return locale;
    }

    QString GetLocaleName ()
    {
        return GetLocale ().name ();
    }

    QString GetInternetLocaleName (const QLocale& locale)
    {
        if (locale.language () == QLocale::AnyLanguage)
            return QStringLiteral ("*");

        auto locStr = locale.name ();
        locStr.replace ('_', '-');
        return locStr;
    }

    QString GetLanguage ()
    {
        return GetLocaleName ().left (2);
    }

    QAction* CreateSeparator (QObject *parent)
    {
        const auto result = new QAction (parent);
        result->setSeparator (true);
        return result;
    }
}