LoadPlugin.h

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#ifndef LOADPLUGIN_H
#define LOADPLUGIN_H
 
#include <Logger.h>
#include <QCoreApplication>
#include <QPluginLoader>
#include <QString>
#include <joinpath.h>
#include <memory>
 
template <typename ImplType, typename Interface> std::shared_ptr<ImplType> loadPlugin(std::string name)
{
    std::shared_ptr<ImplType> ret;
 
#ifdef QT_DEBUG
    name.push_back('d');
#endif
 
#ifdef Q_OS_WIN
    QString path = QString::fromStdString(name);
#else
    QString path = QCoreApplication::applicationDirPath() / QString::fromStdString("../lib/lib" + name + ".so");
#endif
    
    char const *const c_name = name.c_str();
    
    logprintf(LOG_DEFAULT, "loading the plugin %s", path.toStdString().c_str());
    QPluginLoader loader(path);
    Interface *plugin = dynamic_cast<Interface *>(loader.instance());
    if (plugin) {
        ret = std::shared_ptr<ImplType>(plugin->create());
        if (ret->open()) {
            qDebug() << QString::asprintf("%s is loaded successfully.", c_name);
        } else {
            qDebug() << QString::asprintf("Failed to load the plugin %s", c_name);
            return {};
        }
    } else {
        qDebug() << loader.errorString();
        return {};
    }
    
    return ret;
}
 
 
#endif // LOADPLUGIN_H