Piwik\Plugins\CorePluginsAdmin\PluginInstaller::installOrUpdatePluginFromMarketplace PHP Method

    public function installOrUpdatePluginFromMarketplace($pluginName)
    {
        $this->checkMarketplaceIsEnabled();
        $this->pluginName = $pluginName;
        try {
            $this->makeSureFoldersAreWritable();
            $this->makeSurePluginNameIsValid();
            $tmpPluginZip = $this->downloadPluginFromMarketplace();
            $tmpPluginFolder = dirname($tmpPluginZip) . '/' . basename($tmpPluginZip, '.zip') . '/';
            $this->extractPluginFiles($tmpPluginZip, $tmpPluginFolder);
            $this->makeSurePluginJsonExists($tmpPluginFolder);
            $metadata = $this->getPluginMetadataIfValid($tmpPluginFolder);
            $this->makeSureThereAreNoMissingRequirements($metadata);
            $this->copyPluginToDestination($tmpPluginFolder);
            Filesystem::deleteAllCacheOnUpdate($this->pluginName);
            $pluginManager = PluginManager::getInstance();
            if ($pluginManager->isPluginLoaded($this->pluginName)) {
                $plugin = PluginManager::getInstance()->getLoadedPlugin($this->pluginName);
                if (!empty($plugin)) {
                    $plugin->reloadPluginInformation();
                }
            }
        } catch (\Exception $e) {
            if (!empty($tmpPluginZip)) {
                Filesystem::deleteFileIfExists($tmpPluginZip);
            }
            if (!empty($tmpPluginFolder)) {
                $this->removeFolderIfExists($tmpPluginFolder);
            }
            throw $e;
        }
        $this->removeFileIfExists($tmpPluginZip);
        $this->removeFolderIfExists($tmpPluginFolder);
    }

 private function createUpdateOrInstallView($template, $nonceName)
 {
     static::dieIfMarketplaceIsDisabled();
     $pluginName = $this->initPluginModification($nonceName);
     $this->dieIfPluginsAdminIsDisabled();
     $view = $this->configureView('@CorePluginsAdmin/' . $template);
     $view->plugin = array('name' => $pluginName);
     try {
         $pluginInstaller = new PluginInstaller($pluginName);
         $pluginInstaller->installOrUpdatePluginFromMarketplace();
     } catch (\Exception $e) {
         $notification = new Notification($e->getMessage());
         $notification->context = Notification::CONTEXT_ERROR;
         Notification\Manager::notify('CorePluginsAdmin_InstallPlugin', $notification);
         $this->redirectAfterModification(true);
         return;
     }
     $marketplace = new Marketplace();
     $view->plugin = $marketplace->getPluginInfo($pluginName);
     return $view;
 }