File indexing completed on 2023-05-30 10:40:15

 /*
     SPDX-License-Identifier: GPL-2.0-or-later
     SPDX-FileCopyrightText: 2009 Alexander Rieder <alexanderrieder@gmail.com>
 */
 
 #include <vector>
 
 #include "backend.h"
 #include "extension.h"
 
 #include <QCoreApplication>
 #include <QDir>
 #include <QPluginLoader>
 #include <QProcess>
 #include <QRegularExpression>
 #include <QStandardPaths>
 #include <QUrl>
 
 #include <KPluginFactory>
 #include <KPluginMetaData>
 #include <KPluginFactory>
 #include <KLocalizedString>
 
 using namespace Cantor;
 
 class Cantor::BackendPrivate
 {
   public:
     QString name;
     QString comment;
     QString icon;
     QString url;
     bool enabled{true};
     QList<GraphicPackage> supportedGraphicPackagesCache;
 };
 
 Backend::Backend(QObject* parent, const QList<QVariant>& args) : QObject(parent),
                                                                 d(new BackendPrivate)
 {
     Q_UNUSED(args)
 }
 
 Backend::~Backend()
 {
     delete d;
 }
 
 QString Backend::name() const
 {
     return d->name;
 }
 
 QString Backend::comment() const
 {
     return d->comment;
 }
 
 QString Backend::description() const
 {
     return comment();
 }
 
 QString Backend::icon() const
 {
     return d->icon;
 }
 
 QString Backend::url() const
 {
     return d->url;
 }
 
 QString Backend::defaultHelp() const
 {
     return QString();
 }
 
 bool Backend::isEnabled() const
 {
     return d->enabled && requirementsFullfilled();
 }
 
 void Backend::setEnabled(bool enabled)
 {
     d->enabled = enabled;
 }
 
 QStringList Backend::listAvailableBackends()
 {
     QStringList l;
     for (Backend* b : availableBackends())
     {
         if(b->isEnabled())
             l<<b->name();
     }
 
     return l;
 }
 
 QList<Backend*> Backend::availableBackends()
 {
     static QList<Backend*> backendCache;
     //if we already have all backends Cached, just return the cache.
     //otherwise create the available backends
     if(!backendCache.isEmpty())
     {
         return backendCache;
     }
 
     const QVector<KPluginMetaData> plugins = KPluginMetaData::findPlugins(QStringLiteral("cantor/backends"));
 
     for (const KPluginMetaData &plugin : plugins) {
 
         const auto result = KPluginFactory::instantiatePlugin<Backend>(plugin, QCoreApplication::instance());
 
         if (!result) {
             qDebug() << "Error while loading backend: " << result.errorText;
             continue;
         }
 
         Backend *backend = result.plugin;
 
         backend->d->name = plugin.name();
         backend->d->comment = plugin.description();
         backend->d->icon = plugin.iconName();
         backend->d->url = plugin.website();
         backendCache << backend;
     }
 
     return backendCache;
 }
 
 Backend* Backend::getBackend(const QString& name)
 {
     for (Backend* b : availableBackends())
     {
         if(b->name().toLower()==name.toLower() || b->id().toLower()==name.toLower())
             return b;
     }
 
     return nullptr;
 }
 
 QStringList Backend::extensions() const
 {
     QList<Extension*> extensions = findChildren<Extension*>(QRegularExpression(QLatin1String(".*Extension")));
     QStringList names;
     for (Extension* e : extensions)
         names << e->objectName();
     return names;
 }
 
 Extension* Backend::extension(const QString& name) const
 {
     return findChild<Extension*>(name);
 }
 
 bool Backend::checkExecutable(const QString& name, const QString& path, QString* reason)
 {
     if (path.isEmpty())
     {
         if (reason)
             *reason = i18n("No path for the %1 executable specified. "
                         "Please provide the correct path in the application settings and try again.",
                         name);
         return false;
     }
 
     QFileInfo info(path);
     if (!info.exists())
     {
         if (reason)
             *reason = i18n("The specified file '%1' for the %2 executable doesn't exist. "
                         "Please provide the correct path in the application settings and try again.",
                         path, name);
         return false;
     }
 
     if (!info.isExecutable())
     {
         if (reason)
             *reason = i18n("The specified file '%1' doesn't point to an executable. "
                         "Please provide the correct path in the application settings and try again.",
                         path);
         return false;
     }
 
     return true;
 }
 
 bool Cantor::Backend::testProgramWritable(const QString& program, const QStringList& args, const QString& filename, const QString& expectedContent, QString* reason, int timeOut)
 {
     QProcess process;
     process.setProgram(program);
     process.setArguments(args);
     process.start();
 
     if (process.waitForFinished(timeOut) == false)
     {
         if (reason)
             *reason = i18n("The program %1 didn't finish the execution after %2 milliseconds during the plot integration test.", QFileInfo(program).fileName(), timeOut);
 
         return false;
     }
 
     QFile file(filename);
     if (!file.open(QIODevice::ReadOnly))
     {
         if (reason)
             *reason = i18n("Failed to open the file %1 during the plot integration test.", filename);
         return false;
     }
 
     QString fileContent = QString::fromLocal8Bit(file.readAll());
     if (fileContent.trimmed() != expectedContent)
     {
         if (reason)
             *reason = i18n("Failed to parse the result during the plot integration test.");
         return false;
     }
 
     file.close();
     file.remove();
 
     return true;
 }
 
 QList<GraphicPackage> Backend::availableGraphicPackages() const
 {
     if (d->supportedGraphicPackagesCache.size() != 0)
         return d->supportedGraphicPackagesCache;
 
     if (!(capabilities() & Capability::IntegratedPlots))
         return QList<GraphicPackage>(); // because this cache is empty
 
     QString packagesFile = id() + QLatin1String("/graphic_packages.xml");
     QString filename = QStandardPaths::locate(QStandardPaths::AppDataLocation, packagesFile, QStandardPaths::LocateFile);
 
     if (filename.isEmpty())
         filename = QStandardPaths::locate(QStandardPaths::GenericDataLocation, QLatin1String("cantor/") + packagesFile, QStandardPaths::LocateFile);
 
     if (filename.isEmpty())
         return QList<GraphicPackage>();
 
     d->supportedGraphicPackagesCache = GraphicPackage::loadFromFile(filename);
 
     return d->supportedGraphicPackagesCache;
 }