<?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;

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->getDatabase();
        $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();

            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()
                    )
                );
            }

            // 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->getDatabase();

        $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->getDatabase();

        $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;
        }
    }
}
