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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2005 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Installer\Adapter;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Application\ApplicationHelper;
use Joomla\CMS\Filesystem\Folder;
use Joomla\CMS\Installer\Installer;
use Joomla\CMS\Installer\InstallerAdapter;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Log\Log;
use Joomla\CMS\Table\Table;
use Joomla\Database\ParameterType;
use Joomla\Utilities\ArrayHelper;

/**
 * Module installer
 *
 * @since  3.1
 */
class ModuleAdapter extends InstallerAdapter
{
	/**
	 * The install client ID
	 *
	 * @var    integer
	 * @since  3.4
	 */
	protected $clientId;

/**
	 * `<scriptfile>` element of the extension manifest
	 *
	 * @var    object
	 * @since  3.1
	 */
	protected $scriptElement = null;

/**
	 * Method to check if the extension is already present in the database
	 *
	 * @return  void
	 *
	 * @since   3.4
	 * @throws  \RuntimeException
	 */
	protected function checkExistingExtension()
	{
		try
		{
			$this->currentExtensionId = $this->extension->find(
				array(
					'element'   => $this->element,
					'type'      => $this->type,
					'client_id' => $this->clientId,
				)
			);
		}
		catch (\RuntimeException $e)
		{
			// Install failed, roll back changes
			throw new \RuntimeException(
				Text::sprintf(
					'JLIB_INSTALLER_ABORT_ROLLBACK',
					Text::_('JLIB_INSTALLER_' . $this->route),
					$e->getMessage()
				),
				$e->getCode(),
				$e
			);
		}
	}

/**
	 * Method to copy the extension's base files from the `<files>` tag(s) and the manifest file
	 *
	 * @return  void
	 *
	 * @since   3.4
	 * @throws  \RuntimeException
	 */
	protected function copyBaseFiles()
	{
		// Copy all necessary files
		if ($this->parent->parseFiles($this->getManifest()->files, -1) === false)
		{
			throw new \RuntimeException(Text::_('JLIB_INSTALLER_ABORT_MOD_COPY_FILES'));
		}

// If there is a manifest script, let's copy it.
		if ($this->manifest_script)
		{
			$path['src']  = $this->parent->getPath('source') . '/' . $this->manifest_script;
			$path['dest'] = $this->parent->getPath('extension_root') . '/' . $this->manifest_script;

if ($this->parent->isOverwrite() || !file_exists($path['dest']))
			{
				if (!$this->parent->copyFiles(array($path)))
				{
					// Install failed, rollback changes
					throw new \RuntimeException(
						Text::sprintf(
							'JLIB_INSTALLER_ABORT_MANIFEST',
							Text::_('JLIB_INSTALLER_' . strtoupper($this->route))
						)
					);
				}
			}
		}
	}

/**
	 * Custom discover method
	 *
	 * @return  array  Extension list of extensions available
	 *
	 * @since   3.1
	 */
	public function discover()
	{
		$results = array();
		$site_list = Folder::folders(JPATH_SITE . '/modules');
		$admin_list = Folder::folders(JPATH_ADMINISTRATOR . '/modules');
		$site_info = ApplicationHelper::getClientInfo('site', true);
		$admin_info = ApplicationHelper::getClientInfo('administrator', true);

foreach ($site_list as $module)
		{
			if (file_exists(JPATH_SITE . "/modules/$module/$module.xml"))
			{
				$manifest_details = Installer::parseXMLInstallFile(JPATH_SITE . "/modules/$module/$module.xml");
				$extension = Table::getInstance('extension');
				$extension->set('type', 'module');
				$extension->set('client_id', $site_info->id);
				$extension->set('element', $module);
				$extension->set('folder', '');
				$extension->set('name', $module);
				$extension->set('state', -1);
				$extension->set('manifest_cache', json_encode($manifest_details));
				$extension->set('params', '{}');
				$results[] = clone $extension;
			}
		}

foreach ($admin_list as $module)
		{
			if (file_exists(JPATH_ADMINISTRATOR . "/modules/$module/$module.xml"))
			{
				$manifest_details = Installer::parseXMLInstallFile(JPATH_ADMINISTRATOR . "/modules/$module/$module.xml");
				$extension = Table::getInstance('extension');
				$extension->set('type', 'module');
				$extension->set('client_id', $admin_info->id);
				$extension->set('element', $module);
				$extension->set('folder', '');
				$extension->set('name', $module);
				$extension->set('state', -1);
				$extension->set('manifest_cache', json_encode($manifest_details));
				$extension->set('params', '{}');
				$results[] = clone $extension;
			}
		}

return $results;
	}

/**
	 * Method to finalise the installation processing
	 *
	 * @return  void
	 *
	 * @since   3.4
	 * @throws  \RuntimeException
	 */
	protected function finaliseInstall()
	{
		// Clobber any possible pending updates
		$update = Table::getInstance('update');
		$uid    = $update->find(
			array(
				'element'   => $this->element,
				'type'      => 'module',
				'client_id' => $this->clientId,
			)
		);

if ($uid)
		{
			$update->delete($uid);
		}

// Lastly, we will copy the manifest file to its appropriate place.
		if ($this->route !== 'discover_install')
		{
			if (!$this->parent->copyManifest(-1))
			{
				// Install failed, rollback changes
				throw new \RuntimeException(
					Text::sprintf(
						'JLIB_INSTALLER_ABORT_COPY_SETUP',
						Text::_('JLIB_INSTALLER_' . strtoupper($this->route))
					)
				);
			}
		}
	}

/**
	 * Method to finalise the uninstallation processing
	 *
	 * @return  boolean
	 *
	 * @since   4.0.0
	 * @throws  \RuntimeException
	 */
	protected function finaliseUninstall(): bool
	{
		$extensionId = $this->extension->extension_id;

$db     = $this->parent->getDbo();
		$retval = true;

// Remove the schema version
		$query = $db->getQuery(true)
			->delete('#__schemas')
			->where('extension_id = :extension_id')
			->bind(':extension_id', $extensionId, ParameterType::INTEGER);
		$db->setQuery($query);
		$db->execute();

$element  = $this->extension->element;
		$clientId = $this->extension->client_id;

// Let's delete all the module copies for the type we are uninstalling
		$query->clear()
			->select($db->quoteName('id'))
			->from($db->quoteName('#__modules'))
			->where($db->quoteName('module') . ' = :element')
			->where($db->quoteName('client_id') . ' = :client_id')
			->bind(':element', $element)
			->bind(':client_id', $clientId, ParameterType::INTEGER);
		$db->setQuery($query);

try
		{
			$modules = $db->loadColumn();
		}
		catch (\RuntimeException $e)
		{
			$modules = [];
		}

// Do we have any module copies?
		if (\count($modules))
		{
			// Ensure the list is sane
			$modules = ArrayHelper::toInteger($modules);
			$modID = implode(',', $modules);

// Wipe out any items assigned to menus
			$query = $db->getQuery(true)
				->delete($db->quoteName('#__modules_menu'))
				->where($db->quoteName('moduleid') . ' IN (' . $modID . ')');
			$db->setQuery($query);

try
			{
				$db->execute();
			}
			catch (\RuntimeException $e)
			{
				Log::add(Text::sprintf('JLIB_INSTALLER_ERROR_MOD_UNINSTALL_EXCEPTION', $e->getMessage()), Log::WARNING, 'jerror');
				$retval = false;
			}

// Wipe out any instances in the modules table
			/** @var \Joomla\CMS\Table\Module $module */
			$module = Table::getInstance('Module');

foreach ($modules as $modInstanceId)
			{
				$module->load($modInstanceId);

if (!$module->delete())
				{
					Log::add(Text::sprintf('JLIB_INSTALLER_ERROR_MOD_UNINSTALL_EXCEPTION', $module->getError()), Log::WARNING, 'jerror');
					$retval = false;
				}
			}
		}

// Now we will no longer need the module object, so let's delete it and free up memory
		$this->extension->delete($this->extension->extension_id);
		$query = $db->getQuery(true)
			->delete($db->quoteName('#__modules'))
			->where($db->quoteName('module') . ' = :element')
			->where($db->quoteName('client_id') . ' = :client_id')
			->bind(':element', $element)
			->bind(':client_id', $clientId, ParameterType::INTEGER);
		$db->setQuery($query);

try
		{
			// Clean up any other ones that might exist as well
			$db->execute();
		}
		catch (\RuntimeException $e)
		{
			// Ignore the error...
		}

// Remove the installation folder
		if (!Folder::delete($this->parent->getPath('extension_root')))
		{
			// Folder should raise an error
			$retval = false;
		}

return $retval;
	}

/**
	 * Get the filtered extension element from the manifest
	 *
	 * @param   string  $element  Optional element name to be converted
	 *
	 * @return  string|null  The filtered element
	 *
	 * @since   3.4
	 */
	public function getElement($element = null)
	{
		if ($element)
		{
			return $element;
		}

// Joomla 4 Module.
		if ((string) $this->getManifest()->element)
		{
			return (string) $this->getManifest()->element;
		}

if (!\count($this->getManifest()->files->children()))
		{
			return $element;
		}

foreach ($this->getManifest()->files->children() as $file)
		{
			if ((string) $file->attributes()->module)
			{
				// Joomla 3 (legacy) Module.
				return strtolower((string) $file->attributes()->module);
			}
		}

return $element;
	}

/**
	 * Custom loadLanguage method
	 *
	 * @param   string  $path  The path where we find language files
	 *
	 * @return  void
	 *
	 * @since   3.4
	 */
	public function loadLanguage($path = null)
	{
		$source = $this->parent->getPath('source');
		$client = $this->parent->extension->client_id ? JPATH_ADMINISTRATOR : JPATH_SITE;

if (!$source)
		{
			$this->parent->setPath('source', $client . '/modules/' . $this->parent->extension->element);
		}

$this->setManifest($this->parent->getManifest());

if ($this->getManifest()->files)
		{
			$extension = $this->getElement();

if ($extension)
			{
				$source = $path ?: ($this->parent->extension->client_id ? JPATH_ADMINISTRATOR : JPATH_SITE) . '/modules/' . $extension;
				$folder = (string) $this->getManifest()->files->attributes()->folder;

if ($folder && file_exists($path . '/' . $folder))
				{
					$source = $path . '/' . $folder;
				}

$client = (string) $this->getManifest()->attributes()->client;
				$this->doLoadLanguage($extension, $source, \constant('JPATH_' . strtoupper($client)));
			}
		}
	}

/**
	 * Method to parse optional tags in the manifest
	 *
	 * @return  void
	 *
	 * @since   3.4
	 */
	protected function parseOptionalTags()
	{
		// Parse optional tags
		$this->parent->parseMedia($this->getManifest()->media, $this->clientId);
		$this->parent->parseLanguages($this->getManifest()->languages, $this->clientId);
	}

/**
	 * Prepares the adapter for a discover_install task
	 *
	 * @return  void
	 *
	 * @since   3.4
	 */
	public function prepareDiscoverInstall()
	{
		$client = ApplicationHelper::getClientInfo($this->parent->extension->client_id);
		$manifestPath = $client->path . '/modules/' . $this->parent->extension->element . '/' . $this->parent->extension->element . '.xml';
		$this->parent->manifest = $this->parent->isManifest($manifestPath);
		$this->parent->setPath('manifest', $manifestPath);
		$this->setManifest($this->parent->getManifest());
	}

/**
	 * Refreshes the extension table cache
	 *
	 * @return  boolean  Result of operation, true if updated, false on failure.
	 *
	 * @since   3.1
	 */
	public function refreshManifestCache()
	{
		$client = ApplicationHelper::getClientInfo($this->parent->extension->client_id);
		$manifestPath = $client->path . '/modules/' . $this->parent->extension->element . '/' . $this->parent->extension->element . '.xml';
		$this->parent->manifest = $this->parent->isManifest($manifestPath);
		$this->parent->setPath('manifest', $manifestPath);
		$manifest_details = Installer::parseXMLInstallFile($this->parent->getPath('manifest'));
		$this->parent->extension->manifest_cache = json_encode($manifest_details);
		$this->parent->extension->name = $manifest_details['name'];

if ($this->parent->extension->store())
		{
			return true;
		}
		else
		{
			Log::add(Text::_('JLIB_INSTALLER_ERROR_MOD_REFRESH_MANIFEST_CACHE'), Log::WARNING, 'jerror');

return false;
		}
	}

/**
	 * Removes this extension's files
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 * @throws  \RuntimeException
	 */
	protected function removeExtensionFiles()
	{
		$this->parent->removeFiles($this->getManifest()->media);
		$this->parent->removeFiles($this->getManifest()->languages, $this->extension->client_id);
	}

/**
	 * Method to do any prechecks and setup the install paths for the extension
	 *
	 * @return  void
	 *
	 * @since   3.4
	 * @throws  \RuntimeException
	 */
	protected function setupInstallPaths()
	{
		// Get the target application
		$cname = (string) $this->getManifest()->attributes()->client;

if ($cname)
		{
			// Attempt to map the client to a base path
			$client = ApplicationHelper::getClientInfo($cname, true);

if ($client === false)
			{
				throw new \RuntimeException(
					Text::sprintf(
						'JLIB_INSTALLER_ABORT_MOD_UNKNOWN_CLIENT',
						Text::_('JLIB_INSTALLER_' . $this->route),
						$client->name
					)
				);
			}

$basePath = $client->path;
			$this->clientId = $client->id;
		}
		else
		{
			// No client attribute was found so we assume the site as the client
			$basePath = JPATH_SITE;
			$this->clientId = 0;
		}

// Set the installation path
		if (empty($this->element))
		{
			throw new \RuntimeException(
				Text::sprintf(
					'JLIB_INSTALLER_ABORT_MOD_INSTALL_NOFILE',
					Text::_('JLIB_INSTALLER_' . $this->route)
				)
			);
		}

$this->parent->setPath('extension_root', $basePath . '/modules/' . $this->element);
	}

/**
	 * Method to do any prechecks and setup the uninstall job
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 */
	protected function setupUninstall()
	{
		// Get the extension root path
		$element = $this->extension->element;
		$client  = ApplicationHelper::getClientInfo($this->extension->client_id);

if ($client === false)
		{
			throw new \RuntimeException(
				Text::sprintf(
					'JLIB_INSTALLER_ERROR_MOD_UNINSTALL_UNKNOWN_CLIENT',
					$this->extension->client_id
				)
			);
		}

$this->parent->setPath('extension_root', $client->path . '/modules/' . $element);

$this->parent->setPath('source', $this->parent->getPath('extension_root'));

// Get the module's manifest object
		// We do findManifest to avoid problem when uninstalling a list of extensions: getManifest cache its manifest file.
		$this->parent->findManifest();
		$this->setManifest($this->parent->getManifest());

// Attempt to load the language file; might have uninstall strings
		$this->loadLanguage(($this->extension->client_id ? JPATH_ADMINISTRATOR : JPATH_SITE) . '/modules/' . $element);
	}

/**
	 * Method to store the extension to the database
	 *
	 * @return  void
	 *
	 * @since   3.4
	 * @throws  \RuntimeException
	 */
	protected function storeExtension()
	{
		// Discover installs are stored a little differently
		if ($this->route === 'discover_install')
		{
			$manifest_details = Installer::parseXMLInstallFile($this->parent->getPath('manifest'));

$this->extension->manifest_cache = json_encode($manifest_details);
			$this->extension->state = 0;
			$this->extension->name = $manifest_details['name'];
			$this->extension->enabled = 1;
			$this->extension->params = $this->parent->getParams();

if (!$this->extension->store())
			{
				// Install failed, roll back changes
				throw new \RuntimeException(Text::_('JLIB_INSTALLER_ERROR_MOD_DISCOVER_STORE_DETAILS'));
			}

return;
		}

// Was there a module already installed with the same name?
		if ($this->currentExtensionId)
		{
			if (!$this->parent->isOverwrite())
			{
				// Install failed, roll back changes
				throw new \RuntimeException(
					Text::sprintf(
						'JLIB_INSTALLER_ABORT_MOD_INSTALL_ALLREADY_EXISTS',
						Text::_('JLIB_INSTALLER_' . $this->route),
						$this->name
					)
				);
			}

// Load the entry and update the manifest_cache
			$this->extension->load($this->currentExtensionId);

// Update name
			$this->extension->name = $this->name;

// Update namespace
			$this->extension->namespace = (string) $this->manifest->namespace;

// Update changelogurl
			$this->extension->changelogurl = (string) $this->manifest->changelogurl;

// Update manifest
			$this->extension->manifest_cache = $this->parent->generateManifestCache();

if (!$this->extension->store())
			{
				// Install failed, roll back changes
				throw new \RuntimeException(
					Text::sprintf(
						'JLIB_INSTALLER_ABORT_MOD_ROLLBACK',
						Text::_('JLIB_INSTALLER_' . $this->route),
						$this->extension->getError()
					)
				);
			}
		}
		else
		{
			$this->extension->name         = $this->name;
			$this->extension->type         = 'module';
			$this->extension->element      = $this->element;
			$this->extension->namespace    = (string) $this->manifest->namespace;
			$this->extension->changelogurl = $this->changelogurl;

// There is no folder for modules
			$this->extension->folder    = '';
			$this->extension->enabled   = 1;
			$this->extension->protected = 0;
			$this->extension->access    = $this->clientId == 1 ? 2 : 0;
			$this->extension->client_id = $this->clientId;
			$this->extension->params    = $this->parent->getParams();

// Update the manifest cache for the entry
			$this->extension->manifest_cache = $this->parent->generateManifestCache();

// Since we have created a module item, we add it to the installation step stack
			// so that if we have to rollback the changes we can undo it.
			$this->parent->pushStep(
				array(
					'type' => 'extension',
					'extension_id' => $this->extension->extension_id,
				)
			);

// Create unpublished module
			$name = preg_replace('#[\*?]#', '', Text::_($this->name));

/** @var \Joomla\CMS\Table\Module $module */
			$module            = Table::getInstance('module');
			$module->title     = $name;
			$module->content   = '';
			$module->module    = $this->element;
			$module->access    = '1';
			$module->showtitle = '1';
			$module->params    = '';
			$module->client_id = $this->clientId;
			$module->language  = '*';

$module->store();
		}
	}

/**
	 * Custom rollback method
	 * - Roll back the menu item
	 *
	 * @param   array  $arg  Installation step to rollback
	 *
	 * @return  boolean  True on success
	 *
	 * @since   3.1
	 */
	protected function _rollback_menu($arg)
	{
		// Get database connector object
		$db = $this->parent->getDbo();

$moduleId = $arg['id'];

// Remove the entry from the #__modules_menu table
		$query = $db->getQuery(true)
			->delete($db->quoteName('#__modules_menu'))
			->where($db->quoteName('moduleid') . ' = :module_id')
			->bind(':module_id', $moduleId, ParameterType::INTEGER);
		$db->setQuery($query);

try
		{
			return $db->execute();
		}
		catch (\RuntimeException $e)
		{
			return false;
		}
	}

/**
	 * Custom rollback method
	 * - Roll back the module item
	 *
	 * @param   array  $arg  Installation step to rollback
	 *
	 * @return  boolean  True on success
	 *
	 * @since   3.1
	 */
	protected function _rollback_module($arg)
	{
		// Get database connector object
		$db = $this->parent->getDbo();

$moduleId = $arg['id'];

// Remove the entry from the #__modules table
		$query = $db->getQuery(true)
			->delete($db->quoteName('#__modules'))
			->where($db->quoteName('id') . ' = :module_id')
			->bind(':module_id', $moduleId, ParameterType::INTEGER);
		$db->setQuery($query);

try
		{
			return $db->execute();
		}
		catch (\RuntimeException $e)
		{
			return false;
		}
	}
}