primo commit

administrator/components/com_templates/src/Controller/DisplayController.php

@@ -0,0 +1,70 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2006 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Controller;
+
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\MVC\Controller\BaseController;
+use Joomla\CMS\Router\Route;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Templates manager display controller.
+ *
+ * @since  1.6
+ */
+class DisplayController extends BaseController
+{
+    /**
+     * @var     string  The default view.
+     * @since   1.6
+     */
+    protected $default_view = 'styles';
+
+    /**
+     * Method to display a view.
+     *
+     * @param   boolean  $cachable   If true, the view output will be cached
+     * @param   boolean  $urlparams  An array of safe URL parameters and their variable types.
+     *                   @see        \Joomla\CMS\Filter\InputFilter::clean() for valid values.
+     *
+     * @return  static|boolean   This object to support chaining or false on failure.
+     *
+     * @since   1.5
+     */
+    public function display($cachable = false, $urlparams = false)
+    {
+        $view   = $this->input->get('view', 'styles');
+        $layout = $this->input->get('layout', 'default');
+        $id     = $this->input->getInt('id');
+
+        // For JSON requests
+        if ($this->app->getDocument()->getType() == 'json') {
+            return parent::display();
+        }
+
+        // Check for edit form.
+        if ($view == 'style' && $layout == 'edit' && !$this->checkEditId('com_templates.edit.style', $id)) {
+            // Somehow the person just went to the form - we don't allow that.
+            if (!\count($this->app->getMessageQueue())) {
+                $this->setMessage(Text::sprintf('JLIB_APPLICATION_ERROR_UNHELD_ID', $id), 'error');
+            }
+
+            $this->setRedirect(Route::_('index.php?option=com_templates&view=styles', false));
+
+            return false;
+        }
+
+        return parent::display();
+    }
+}

administrator/components/com_templates/src/Controller/StyleController.php

@@ -0,0 +1,149 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Controller;
+
+use Joomla\CMS\Application\CMSWebApplicationInterface;
+use Joomla\CMS\Form\Form;
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\MVC\Controller\FormController;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Template style controller class.
+ *
+ * @since  1.6
+ */
+class StyleController extends FormController
+{
+    /**
+     * The prefix to use with controller messages.
+     *
+     * @var     string
+     * @since   1.6
+     */
+    protected $text_prefix = 'COM_TEMPLATES_STYLE';
+
+    /**
+     * Method to save a template style.
+     *
+     * @param   string  $key     The name of the primary key of the URL variable.
+     * @param   string  $urlVar  The name of the URL variable if different from the primary key (sometimes required to avoid router collisions).
+     *
+     * @return  boolean  True if successful, false otherwise.
+     *
+     * @since   1.6
+     */
+    public function save($key = null, $urlVar = null)
+    {
+        $this->checkToken();
+
+        if ($this->app->getDocument()->getType() === 'json') {
+            $model   = $this->getModel('Style', 'Administrator');
+            $table   = $model->getTable();
+            $data    = $this->input->post->get('params', [], 'array');
+            $checkin = $table->hasField('checked_out');
+            $context = $this->option . '.edit.' . $this->context;
+
+            $item = $model->getItem($this->app->getTemplate(true)->id);
+
+            // Setting received params
+            $item->set('params', $data);
+
+            $data = $item->getProperties();
+            unset($data['xml']);
+
+            $key = $table->getKeyName();
+
+            // Access check.
+            if (!$this->allowSave($data, $key)) {
+                $this->app->enqueueMessage(Text::_('JLIB_APPLICATION_ERROR_SAVE_NOT_PERMITTED'), 'error');
+
+                return false;
+            }
+
+            Form::addFormPath(JPATH_ADMINISTRATOR . '/components/com_templates/forms');
+
+            // Validate the posted data.
+            // Sometimes the form needs some posted data, such as for plugins and modules.
+            $form = $model->getForm($data, false);
+
+            if (!$form) {
+                $this->app->enqueueMessage($model->getError(), 'error');
+
+                return false;
+            }
+
+            // Test whether the data is valid.
+            $validData = $model->validate($form, $data);
+
+            if ($validData === false) {
+                // Get the validation messages.
+                $errors = $model->getErrors();
+
+                // Push up to three validation messages out to the user.
+                for ($i = 0, $n = \count($errors); $i < $n && $i < 3; $i++) {
+                    if ($errors[$i] instanceof \Exception) {
+                        $this->app->enqueueMessage($errors[$i]->getMessage(), CMSWebApplicationInterface::MSG_ERROR);
+                    } else {
+                        $this->app->enqueueMessage($errors[$i], CMSWebApplicationInterface::MSG_ERROR);
+                    }
+                }
+
+                // Save the data in the session.
+                $this->app->setUserState($context . '.data', $data);
+
+                return false;
+            }
+
+            if (!isset($validData['tags'])) {
+                $validData['tags'] = null;
+            }
+
+            // Attempt to save the data.
+            if (!$model->save($validData)) {
+                // Save the data in the session.
+                $this->app->setUserState($context . '.data', $validData);
+
+                $this->app->enqueueMessage(Text::sprintf('JLIB_APPLICATION_ERROR_SAVE_FAILED', $model->getError()), 'error');
+
+                return false;
+            }
+
+            // Save succeeded, so check-in the record.
+            if ($checkin && $model->checkin($validData[$key]) === false) {
+                // Save the data in the session.
+                $this->app->setUserState($context . '.data', $validData);
+
+                // Check-in failed, so go back to the record and display a notice.
+                $this->app->enqueueMessage(Text::sprintf('JLIB_APPLICATION_ERROR_CHECKIN_FAILED', $model->getError()), 'error');
+
+                return false;
+            }
+
+            // Redirect the user and adjust session state
+            // Set the record data in the session.
+            $recordId = $model->getState($this->context . '.id');
+            $this->holdEditId($context, $recordId);
+            $this->app->setUserState($context . '.data', null);
+            $model->checkout($recordId);
+
+            // Invoke the postSave method to allow for the child class to access the model.
+            $this->postSaveHook($model, $validData);
+
+            return true;
+        }
+
+        return parent::save($key, $urlVar);
+    }
+}

administrator/components/com_templates/src/Controller/StylesController.php

@@ -0,0 +1,145 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Controller;
+
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\MVC\Controller\AdminController;
+use Joomla\CMS\MVC\Model\BaseDatabaseModel;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Template styles list controller class.
+ *
+ * @since  1.6
+ */
+class StylesController extends AdminController
+{
+    /**
+     * Method to clone and existing template style.
+     *
+     * @return  void
+     */
+    public function duplicate()
+    {
+        // Check for request forgeries
+        $this->checkToken();
+
+        $pks = (array) $this->input->post->get('cid', [], 'int');
+
+        // Remove zero values resulting from input filter
+        $pks = array_filter($pks);
+
+        try {
+            if (empty($pks)) {
+                throw new \Exception(Text::_('COM_TEMPLATES_NO_TEMPLATE_SELECTED'));
+            }
+
+            $model = $this->getModel();
+            $model->duplicate($pks);
+            $this->setMessage(Text::_('COM_TEMPLATES_SUCCESS_DUPLICATED'));
+        } catch (\Exception $e) {
+            $this->app->enqueueMessage($e->getMessage(), 'error');
+        }
+
+        $this->setRedirect('index.php?option=com_templates&view=styles');
+    }
+
+    /**
+     * Proxy for getModel.
+     *
+     * @param   string  $name    The model name. Optional.
+     * @param   string  $prefix  The class prefix. Optional.
+     * @param   array   $config  Configuration array for model. Optional.
+     *
+     * @return  BaseDatabaseModel
+     *
+     * @since   1.6
+     */
+    public function getModel($name = 'Style', $prefix = 'Administrator', $config = [])
+    {
+        return parent::getModel($name, $prefix, ['ignore_request' => true]);
+    }
+
+    /**
+     * Method to set the home template for a client.
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    public function setDefault()
+    {
+        // Check for request forgeries
+        $this->checkToken();
+
+        $pks = (array) $this->input->post->get('cid', [], 'int');
+
+        // Remove zero values resulting from input filter
+        $pks = array_filter($pks);
+
+        try {
+            if (empty($pks)) {
+                throw new \Exception(Text::_('COM_TEMPLATES_NO_TEMPLATE_SELECTED'));
+            }
+
+            // Pop off the first element.
+            $id = array_shift($pks);
+
+            /** @var \Joomla\Component\Templates\Administrator\Model\StyleModel $model */
+            $model = $this->getModel();
+            $model->setHome($id);
+            $this->setMessage(Text::_('COM_TEMPLATES_SUCCESS_HOME_SET'));
+        } catch (\Exception $e) {
+            $this->setMessage($e->getMessage(), 'warning');
+        }
+
+        $this->setRedirect('index.php?option=com_templates&view=styles');
+    }
+
+    /**
+     * Method to unset the default template for a client and for a language
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    public function unsetDefault()
+    {
+        // Check for request forgeries
+        $this->checkToken('request');
+
+        $pks = (array) $this->input->get->get('cid', [], 'int');
+
+        // Remove zero values resulting from input filter
+        $pks = array_filter($pks);
+
+        try {
+            if (empty($pks)) {
+                throw new \Exception(Text::_('COM_TEMPLATES_NO_TEMPLATE_SELECTED'));
+            }
+
+            // Pop off the first element.
+            $id = array_shift($pks);
+
+            /** @var \Joomla\Component\Templates\Administrator\Model\StyleModel $model */
+            $model = $this->getModel();
+            $model->unsetHome($id);
+            $this->setMessage(Text::_('COM_TEMPLATES_SUCCESS_HOME_UNSET'));
+        } catch (\Exception $e) {
+            $this->setMessage($e->getMessage(), 'warning');
+        }
+
+        $this->setRedirect('index.php?option=com_templates&view=styles');
+    }
+}

administrator/components/com_templates/src/Extension/TemplatesComponent.php

@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2018 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Extension;
+
+use Joomla\CMS\Extension\BootableExtensionInterface;
+use Joomla\CMS\Extension\MVCComponent;
+use Joomla\CMS\HTML\HTMLRegistryAwareTrait;
+use Joomla\Component\Templates\Administrator\Service\HTML\Templates;
+use Psr\Container\ContainerInterface;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Component class for com_templates
+ *
+ * @since  4.0.0
+ */
+class TemplatesComponent extends MVCComponent implements BootableExtensionInterface
+{
+    use HTMLRegistryAwareTrait;
+
+    /**
+     * Booting the extension. This is the function to set up the environment of the extension like
+     * registering new class loaders, etc.
+     *
+     * If required, some initial set up can be done from services of the container, eg.
+     * registering HTML services.
+     *
+     * @param   ContainerInterface  $container  The container
+     *
+     * @return  void
+     *
+     * @since   4.0.0
+     */
+    public function boot(ContainerInterface $container)
+    {
+        $this->getRegistry()->register('templates', new Templates());
+    }
+}

administrator/components/com_templates/src/Field/TemplatelocationField.php

@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2015 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Field;
+
+use Joomla\CMS\Form\Field\ListField;
+use Joomla\Component\Templates\Administrator\Helper\TemplatesHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Template Location field.
+ *
+ * @since  3.5
+ */
+class TemplatelocationField extends ListField
+{
+    /**
+     * The form field type.
+     *
+     * @var    string
+     * @since  3.5
+     */
+    protected $type = 'TemplateLocation';
+
+    /**
+     * Method to get the field options.
+     *
+     * @return  array  The field option objects.
+     *
+     * @since   3.5
+     */
+    public function getOptions()
+    {
+        $options = TemplatesHelper::getClientOptions();
+
+        return array_merge(parent::getOptions(), $options);
+    }
+}

administrator/components/com_templates/src/Field/TemplatenameField.php

@@ -0,0 +1,54 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2015 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Field;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\Form\Field\ListField;
+use Joomla\Component\Templates\Administrator\Helper\TemplatesHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Template Name field.
+ *
+ * @since  3.5
+ */
+class TemplatenameField extends ListField
+{
+    /**
+     * The form field type.
+     *
+     * @var    string
+     * @since  3.5
+     */
+    protected $type = 'TemplateName';
+
+    /**
+     * Method to get the field options.
+     *
+     * @return  array  The field option objects.
+     *
+     * @since   1.6
+     */
+    public function getOptions()
+    {
+        // Get the client_id filter from the user state.
+        $clientId = Factory::getApplication()->getUserStateFromRequest('com_templates.styles.client_id', 'client_id', '0', 'string');
+
+        // Get the templates for the selected client_id.
+        $options = TemplatesHelper::getTemplateOptions($clientId);
+
+        // Merge into the parent options.
+        return array_merge(parent::getOptions(), $options);
+    }
+}

administrator/components/com_templates/src/Helper/TemplateHelper.php

@@ -0,0 +1,170 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2017 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Helper;
+
+use Joomla\CMS\Component\ComponentHelper;
+use Joomla\CMS\Factory;
+use Joomla\CMS\Filesystem\File;
+use Joomla\CMS\Language\Text;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Template Helper class.
+ *
+ * @since  3.2
+ */
+abstract class TemplateHelper
+{
+    /**
+     * Checks if the file is an image
+     *
+     * @param   string  $fileName  The filename
+     *
+     * @return  boolean
+     *
+     * @since   3.2
+     */
+    public static function getTypeIcon($fileName)
+    {
+        // Get file extension
+        return strtolower(substr($fileName, strrpos($fileName, '.') + 1));
+    }
+
+    /**
+     * Checks if the file can be uploaded
+     *
+     * @param   array   $file  File information
+     * @param   string  $err   An error message to be returned
+     *
+     * @return  boolean
+     *
+     * @since   3.2
+     */
+    public static function canUpload($file, $err = '')
+    {
+        $params = ComponentHelper::getParams('com_templates');
+
+        if (empty($file['name'])) {
+            $app = Factory::getApplication();
+            $app->enqueueMessage(Text::_('COM_TEMPLATES_ERROR_UPLOAD_INPUT'), 'error');
+
+            return false;
+        }
+
+        // Media file names should never have executable extensions buried in them.
+        $executable = [
+            'exe', 'phtml','java', 'perl', 'py', 'asp','dll', 'go', 'jar',
+            'ade', 'adp', 'bat', 'chm', 'cmd', 'com', 'cpl', 'hta', 'ins', 'isp',
+            'jse', 'lib', 'mde', 'msc', 'msp', 'mst', 'pif', 'scr', 'sct', 'shb',
+            'sys', 'vb', 'vbe', 'vbs', 'vxd', 'wsc', 'wsf', 'wsh',
+        ];
+        $explodedFileName = explode('.', $file['name']);
+
+        if (\count($explodedFileName) > 2) {
+            foreach ($executable as $extensionName) {
+                if (\in_array($extensionName, $explodedFileName)) {
+                    $app = Factory::getApplication();
+                    $app->enqueueMessage(Text::_('COM_TEMPLATES_ERROR_EXECUTABLE'), 'error');
+
+                    return false;
+                }
+            }
+        }
+
+        if ($file['name'] !== File::makeSafe($file['name']) || preg_match('/\s/', File::makeSafe($file['name']))) {
+            $app = Factory::getApplication();
+            $app->enqueueMessage(Text::_('COM_TEMPLATES_ERROR_WARNFILENAME'), 'error');
+
+            return false;
+        }
+
+        $format = strtolower(File::getExt($file['name']));
+
+        $imageTypes   = explode(',', $params->get('image_formats', 'gif,bmp,jpg,jpeg,png,webp'));
+        $sourceTypes  = explode(',', $params->get('source_formats', 'txt,less,ini,xml,js,php,css,scss,sass,json'));
+        $fontTypes    = explode(',', $params->get('font_formats', 'woff,woff2,ttf,otf'));
+        $archiveTypes = explode(',', $params->get('compressed_formats', 'zip'));
+
+        $allowable = array_merge($imageTypes, $sourceTypes, $fontTypes, $archiveTypes);
+
+        if ($format == '' || $format == false || (!\in_array($format, $allowable))) {
+            $app = Factory::getApplication();
+            $app->enqueueMessage(Text::_('COM_TEMPLATES_ERROR_WARNFILETYPE'), 'error');
+
+            return false;
+        }
+
+        if (\in_array($format, $archiveTypes)) {
+            $zip = new \ZipArchive();
+
+            if ($zip->open($file['tmp_name']) === true) {
+                for ($i = 0; $i < $zip->numFiles; $i++) {
+                    $entry     = $zip->getNameIndex($i);
+                    $endString = substr($entry, -1);
+
+                    if ($endString != DIRECTORY_SEPARATOR) {
+                        $explodeArray = explode('.', $entry);
+                        $ext          = end($explodeArray);
+
+                        if (!\in_array($ext, $allowable)) {
+                            $app = Factory::getApplication();
+                            $app->enqueueMessage(Text::_('COM_TEMPLATES_FILE_UNSUPPORTED_ARCHIVE'), 'error');
+
+                            return false;
+                        }
+                    }
+                }
+            } else {
+                $app = Factory::getApplication();
+                $app->enqueueMessage(Text::_('COM_TEMPLATES_FILE_ARCHIVE_OPEN_FAIL'), 'error');
+
+                return false;
+            }
+        }
+
+        // Max upload size set to 10 MB for Template Manager
+        $maxSize = (int) ($params->get('upload_limit') * 1024 * 1024);
+
+        if ($maxSize > 0 && (int) $file['size'] > $maxSize) {
+            $app = Factory::getApplication();
+            $app->enqueueMessage(Text::_('COM_TEMPLATES_ERROR_WARNFILETOOLARGE'), 'error');
+
+            return false;
+        }
+
+        $xss_check = file_get_contents($file['tmp_name'], false, null, -1, 256);
+        $html_tags = [
+            'abbr', 'acronym', 'address', 'applet', 'area', 'audioscope', 'base', 'basefont', 'bdo', 'bgsound', 'big', 'blackface', 'blink', 'blockquote',
+            'body', 'bq', 'br', 'button', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'comment', 'custom', 'dd', 'del', 'dfn', 'dir', 'div',
+            'dl', 'dt', 'em', 'embed', 'fieldset', 'fn', 'font', 'form', 'frame', 'frameset', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'hr', 'html',
+            'iframe', 'ilayer', 'img', 'input', 'ins', 'isindex', 'keygen', 'kbd', 'label', 'layer', 'legend', 'li', 'limittext', 'link', 'listing',
+            'map', 'marquee', 'menu', 'meta', 'multicol', 'nobr', 'noembed', 'noframes', 'noscript', 'nosmartquotes', 'object', 'ol', 'optgroup', 'option',
+            'param', 'plaintext', 'pre', 'rt', 'ruby', 's', 'samp', 'script', 'select', 'server', 'shadow', 'sidebar', 'small', 'spacer', 'span', 'strike',
+            'strong', 'style', 'sub', 'sup', 'table', 'tbody', 'td', 'textarea', 'tfoot', 'th', 'thead', 'title', 'tr', 'tt', 'ul', 'var', 'wbr', 'xml',
+            'xmp', '!DOCTYPE', '!--',
+        ];
+
+        foreach ($html_tags as $tag) {
+            // A tag is '<tagname ', so we need to add < and a space or '<tagname>'
+            if (stristr($xss_check, '<' . $tag . ' ') || stristr($xss_check, '<' . $tag . '>')) {
+                $app = Factory::getApplication();
+                $app->enqueueMessage(Text::_('COM_TEMPLATES_ERROR_WARNIEXSS'), 'error');
+
+                return false;
+            }
+        }
+
+        return true;
+    }
+}

administrator/components/com_templates/src/Helper/TemplatesHelper.php

@@ -0,0 +1,153 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2017 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Helper;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\HTML\HTMLHelper;
+use Joomla\CMS\Installer\Installer;
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\Object\CMSObject;
+use Joomla\Database\ParameterType;
+use Joomla\Filesystem\Path;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Templates component helper.
+ *
+ * @since  1.6
+ */
+class TemplatesHelper
+{
+    /**
+     * Get a list of filter options for the application clients.
+     *
+     * @return  array  An array of HtmlOption elements.
+     */
+    public static function getClientOptions()
+    {
+        // Build the filter options.
+        $options   = [];
+        $options[] = HTMLHelper::_('select.option', '0', Text::_('JSITE'));
+        $options[] = HTMLHelper::_('select.option', '1', Text::_('JADMINISTRATOR'));
+
+        return $options;
+    }
+
+    /**
+     * Get a list of filter options for the templates with styles.
+     *
+     * @param   mixed  $clientId  The CMS client id (0:site | 1:administrator) or '*' for all.
+     *
+     * @return  array
+     */
+    public static function getTemplateOptions($clientId = '*')
+    {
+        // Build the filter options.
+        $db    = Factory::getDbo();
+        $query = $db->getQuery(true);
+
+        $query->select($db->quoteName('element', 'value'))
+            ->select($db->quoteName('name', 'text'))
+            ->select($db->quoteName('extension_id', 'e_id'))
+            ->from($db->quoteName('#__extensions'))
+            ->where($db->quoteName('type') . ' = ' . $db->quote('template'))
+            ->where($db->quoteName('enabled') . ' = 1')
+            ->order($db->quoteName('client_id') . ' ASC')
+            ->order($db->quoteName('name') . ' ASC');
+
+        if ($clientId != '*') {
+            $clientId = (int) $clientId;
+            $query->where($db->quoteName('client_id') . ' = :clientid')
+                ->bind(':clientid', $clientId, ParameterType::INTEGER);
+        }
+
+        $db->setQuery($query);
+        $options = $db->loadObjectList();
+
+        return $options;
+    }
+
+    /**
+     * @param   string  $templateBaseDir
+     * @param   string  $templateDir
+     *
+     * @return boolean|CMSObject
+     */
+    public static function parseXMLTemplateFile($templateBaseDir, $templateDir)
+    {
+        $data = new CMSObject();
+
+        // Check of the xml file exists
+        $filePath = Path::clean($templateBaseDir . '/templates/' . $templateDir . '/templateDetails.xml');
+
+        if (is_file($filePath)) {
+            $xml = Installer::parseXMLInstallFile($filePath);
+
+            if ($xml['type'] != 'template') {
+                return false;
+            }
+
+            foreach ($xml as $key => $value) {
+                $data->set($key, $value);
+            }
+        }
+
+        return $data;
+    }
+
+    /**
+     * @param   integer  $clientId
+     * @param   string   $templateDir
+     *
+     * @return  boolean|array
+     *
+     * @since   3.0
+     */
+    public static function getPositions($clientId, $templateDir)
+    {
+        $positions = [];
+
+        $templateBaseDir = $clientId ? JPATH_ADMINISTRATOR : JPATH_SITE;
+        $filePath        = Path::clean($templateBaseDir . '/templates/' . $templateDir . '/templateDetails.xml');
+
+        if (is_file($filePath)) {
+            // Read the file to see if it's a valid component XML file
+            $xml = simplexml_load_file($filePath);
+
+            if (!$xml) {
+                return false;
+            }
+
+            // Check for a valid XML root tag.
+
+            // Extensions use 'extension' as the root tag.  Languages use 'metafile' instead
+
+            if ($xml->getName() != 'extension' && $xml->getName() != 'metafile') {
+                unset($xml);
+
+                return false;
+            }
+
+            $positions = (array) $xml->positions;
+
+            if (isset($positions['position'])) {
+                $positions = (array) $positions['position'];
+            } else {
+                $positions = [];
+            }
+        }
+
+        return $positions;
+    }
+}

administrator/components/com_templates/src/Model/StyleModel.php

@@ -0,0 +1,794 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Model;
+
+use Joomla\CMS\Application\ApplicationHelper;
+use Joomla\CMS\Component\ComponentHelper;
+use Joomla\CMS\Factory;
+use Joomla\CMS\Form\Form;
+use Joomla\CMS\Language\Multilanguage;
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
+use Joomla\CMS\MVC\Model\AdminModel;
+use Joomla\CMS\Object\CMSObject;
+use Joomla\CMS\Plugin\PluginHelper;
+use Joomla\CMS\Table\Table;
+use Joomla\Database\ParameterType;
+use Joomla\Filesystem\Path;
+use Joomla\Registry\Registry;
+use Joomla\String\StringHelper;
+use Joomla\Utilities\ArrayHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Template style model.
+ *
+ * @since  1.6
+ */
+class StyleModel extends AdminModel
+{
+    /**
+     * The help screen key for the module.
+     *
+     * @var     string
+     * @since   1.6
+     */
+    protected $helpKey = 'Templates:_Edit_Style';
+
+    /**
+     * The help screen base URL for the module.
+     *
+     * @var     string
+     * @since   1.6
+     */
+    protected $helpURL;
+
+    /**
+     * Item cache.
+     *
+     * @var    array
+     * @since  1.6
+     */
+    private $_cache = [];
+
+    /**
+     * Constructor.
+     *
+     * @param   array                 $config   An optional associative array of configuration settings.
+     * @param   ?MVCFactoryInterface  $factory  The factory.
+     *
+     * @see     \Joomla\CMS\MVC\Model\BaseDatabaseModel
+     * @since   3.2
+     */
+    public function __construct($config = [], ?MVCFactoryInterface $factory = null)
+    {
+        $config = array_merge(
+            [
+                'event_before_delete' => 'onExtensionBeforeDelete',
+                'event_after_delete'  => 'onExtensionAfterDelete',
+                'event_before_save'   => 'onExtensionBeforeSave',
+                'event_after_save'    => 'onExtensionAfterSave',
+                'events_map'          => ['delete' => 'extension', 'save' => 'extension'],
+            ],
+            $config
+        );
+
+        parent::__construct($config, $factory);
+    }
+
+    /**
+     * Method to auto-populate the model state.
+     *
+     * @note    Calling getState in this method will result in recursion.
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    protected function populateState()
+    {
+        $app = Factory::getApplication();
+
+        // Load the User state.
+        $pk = $app->getInput()->getInt('id');
+        $this->setState('style.id', $pk);
+
+        // Load the parameters.
+        $params = ComponentHelper::getParams('com_templates');
+        $this->setState('params', $params);
+    }
+
+    /**
+     * Method to delete rows.
+     *
+     * @param   array  &$pks  An array of item ids.
+     *
+     * @return  boolean  Returns true on success, false on failure.
+     *
+     * @since   1.6
+     * @throws  \Exception
+     */
+    public function delete(&$pks)
+    {
+        $pks        = (array) $pks;
+        $user       = $this->getCurrentUser();
+        $table      = $this->getTable();
+        $context    = $this->option . '.' . $this->name;
+
+        PluginHelper::importPlugin($this->events_map['delete']);
+
+        // Iterate the items to delete each one.
+        foreach ($pks as $pk) {
+            if ($table->load($pk)) {
+                // Access checks.
+                if (!$user->authorise('core.delete', 'com_templates')) {
+                    throw new \Exception(Text::_('JERROR_CORE_DELETE_NOT_PERMITTED'));
+                }
+
+                // You should not delete a default style
+                if ($table->home != '0') {
+                    Factory::getApplication()->enqueueMessage(Text::_('COM_TEMPLATES_STYLE_CANNOT_DELETE_DEFAULT_STYLE'), 'error');
+
+                    return false;
+                }
+
+                // Trigger the before delete event.
+                $result = Factory::getApplication()->triggerEvent($this->event_before_delete, [$context, $table]);
+
+                if (\in_array(false, $result, true) || !$table->delete($pk)) {
+                    $this->setError($table->getError());
+
+                    return false;
+                }
+
+                // Trigger the after delete event.
+                Factory::getApplication()->triggerEvent($this->event_after_delete, [$context, $table]);
+            } else {
+                $this->setError($table->getError());
+
+                return false;
+            }
+        }
+
+        // Clean cache
+        $this->cleanCache();
+
+        return true;
+    }
+
+    /**
+     * Method to duplicate styles.
+     *
+     * @param   array  &$pks  An array of primary key IDs.
+     *
+     * @return  boolean  True if successful.
+     *
+     * @throws  \Exception
+     */
+    public function duplicate(&$pks)
+    {
+        $user = $this->getCurrentUser();
+
+        // Access checks.
+        if (!$user->authorise('core.create', 'com_templates')) {
+            throw new \Exception(Text::_('JERROR_CORE_CREATE_NOT_PERMITTED'));
+        }
+
+        $context    = $this->option . '.' . $this->name;
+
+        // Include the plugins for the save events.
+        PluginHelper::importPlugin($this->events_map['save']);
+
+        $table = $this->getTable();
+
+        foreach ($pks as $pk) {
+            if ($table->load($pk, true)) {
+                // Reset the id to create a new record.
+                $table->id = 0;
+
+                // Reset the home (don't want dupes of that field).
+                $table->home = 0;
+
+                // Alter the title.
+                $m            = null;
+                $table->title = $this->generateNewTitle(null, null, $table->title);
+
+                if (!$table->check()) {
+                    throw new \Exception($table->getError());
+                }
+
+                // Trigger the before save event.
+                $result = Factory::getApplication()->triggerEvent($this->event_before_save, [$context, &$table, true]);
+
+                if (\in_array(false, $result, true) || !$table->store()) {
+                    throw new \Exception($table->getError());
+                }
+
+                // Trigger the after save event.
+                Factory::getApplication()->triggerEvent($this->event_after_save, [$context, &$table, true]);
+            } else {
+                throw new \Exception($table->getError());
+            }
+        }
+
+        // Clean cache
+        $this->cleanCache();
+
+        return true;
+    }
+
+    /**
+     * Method to change the title.
+     *
+     * @param   integer  $categoryId  The id of the category.
+     * @param   string   $alias       The alias.
+     * @param   string   $title       The title.
+     *
+     * @return  string  New title.
+     *
+     * @since   1.7.1
+     */
+    protected function generateNewTitle($categoryId, $alias, $title)
+    {
+        // Alter the title
+        $table = $this->getTable();
+
+        while ($table->load(['title' => $title])) {
+            $title = StringHelper::increment($title);
+        }
+
+        return $title;
+    }
+
+    /**
+     * Method to get the record form.
+     *
+     * @param   array    $data      An optional array of data for the form to interrogate.
+     * @param   boolean  $loadData  True if the form is to load its own data (default case), false if not.
+     *
+     * @return  Form  A Form object on success, false on failure
+     *
+     * @since   1.6
+     */
+    public function getForm($data = [], $loadData = true)
+    {
+        // The folder and element vars are passed when saving the form.
+        if (empty($data)) {
+            $item      = $this->getItem();
+            $clientId  = $item->client_id;
+            $template  = $item->template;
+        } else {
+            $clientId  = ArrayHelper::getValue($data, 'client_id');
+            $template  = ArrayHelper::getValue($data, 'template');
+        }
+
+        // Add the default fields directory
+        $baseFolder = $clientId ? JPATH_ADMINISTRATOR : JPATH_SITE;
+        Form::addFieldPath($baseFolder . '/templates/' . $template . '/field');
+
+        // These variables are used to add data from the plugin XML files.
+        $this->setState('item.client_id', $clientId);
+        $this->setState('item.template', $template);
+
+        // Get the form.
+        $form = $this->loadForm('com_templates.style', 'style', ['control' => 'jform', 'load_data' => $loadData]);
+
+        if (empty($form)) {
+            return false;
+        }
+
+        // Modify the form based on access controls.
+        if (!$this->canEditState((object) $data)) {
+            // Disable fields for display.
+            $form->setFieldAttribute('home', 'disabled', 'true');
+
+            // Disable fields while saving.
+            // The controller has already verified this is a record you can edit.
+            $form->setFieldAttribute('home', 'filter', 'unset');
+        }
+
+        return $form;
+    }
+
+    /**
+     * Method to get the data that should be injected in the form.
+     *
+     * @return  mixed  The data for the form.
+     *
+     * @since   1.6
+     */
+    protected function loadFormData()
+    {
+        // Check the session for previously entered form data.
+        $data = Factory::getApplication()->getUserState('com_templates.edit.style.data', []);
+
+        if (empty($data)) {
+            $data = $this->getItem();
+        }
+
+        $this->preprocessData('com_templates.style', $data);
+
+        return $data;
+    }
+
+    /**
+     * Method to get a single record.
+     *
+     * @param   integer  $pk  The id of the primary key.
+     *
+     * @return  mixed  Object on success, false on failure.
+     */
+    public function getItem($pk = null)
+    {
+        $pk = (!empty($pk)) ? $pk : (int) $this->getState('style.id');
+
+        if (!isset($this->_cache[$pk])) {
+            // Get a row instance.
+            $table = $this->getTable();
+
+            // Attempt to load the row.
+            $return = $table->load($pk);
+
+            // Check for a table object error.
+            if ($return === false && $table->getError()) {
+                $this->setError($table->getError());
+
+                return false;
+            }
+
+            // Convert to the \Joomla\CMS\Object\CMSObject before adding other data.
+            $properties        = $table->getProperties(1);
+            $this->_cache[$pk] = ArrayHelper::toObject($properties, CMSObject::class);
+
+            // Convert the params field to an array.
+            $registry                  = new Registry($table->params);
+            $this->_cache[$pk]->params = $registry->toArray();
+
+            // Get the template XML.
+            $client = ApplicationHelper::getClientInfo($table->client_id);
+            $path   = Path::clean($client->path . '/templates/' . $table->template . '/templateDetails.xml');
+
+            if (file_exists($path)) {
+                $this->_cache[$pk]->xml = simplexml_load_file($path);
+            } else {
+                $this->_cache[$pk]->xml = null;
+            }
+        }
+
+        return $this->_cache[$pk];
+    }
+
+    /**
+     * Method to allow derived classes to preprocess the form.
+     *
+     * @param   Form   $form   A Form object.
+     * @param   mixed   $data   The data expected for the form.
+     * @param   string  $group  The name of the plugin group to import (defaults to "content").
+     *
+     * @return  void
+     *
+     * @since   1.6
+     * @throws  \Exception if there is an error in the form event.
+     */
+    protected function preprocessForm(Form $form, $data, $group = 'content')
+    {
+        $clientId = $this->getState('item.client_id');
+        $template = $this->getState('item.template');
+        $lang     = Factory::getLanguage();
+        $client   = ApplicationHelper::getClientInfo($clientId);
+
+        if (!$form->loadFile('style_' . $client->name, true)) {
+            throw new \Exception(Text::_('JERROR_LOADFILE_FAILED'));
+        }
+
+        $formFile = Path::clean($client->path . '/templates/' . $template . '/templateDetails.xml');
+
+        // Load the core and/or local language file(s).
+        // Default to using parent template language constants
+        $lang->load('tpl_' . $data->parent, $client->path)
+            || $lang->load('tpl_' . $data->parent, $client->path . '/templates/' . $data->parent);
+
+        // Apply any, optional, overrides for child template language constants
+        $lang->load('tpl_' . $template, $client->path)
+            || $lang->load('tpl_' . $template, $client->path . '/templates/' . $template);
+
+        if (file_exists($formFile)) {
+            // Get the template form.
+            if (!$form->loadFile($formFile, false, '//config')) {
+                throw new \Exception(Text::_('JERROR_LOADFILE_FAILED'));
+            }
+        }
+
+        // Disable home field if it is default style
+
+        if (
+            (\is_array($data) && \array_key_exists('home', $data) && $data['home'] == '1')
+            || (\is_object($data) && isset($data->home) && $data->home == '1')
+        ) {
+            $form->setFieldAttribute('home', 'readonly', 'true');
+        }
+
+        if ($client->name === 'site' && !Multilanguage::isEnabled()) {
+            $form->setFieldAttribute('home', 'type', 'radio');
+            $form->setFieldAttribute('home', 'layout', 'joomla.form.field.radio.switcher');
+        }
+
+        // Attempt to load the xml file.
+        if (!$xml = simplexml_load_file($formFile)) {
+            throw new \Exception(Text::_('JERROR_LOADFILE_FAILED'));
+        }
+
+        // Get the help data from the XML file if present.
+        $help = $xml->xpath('/extension/help');
+
+        if (!empty($help)) {
+            $helpKey = trim((string) $help[0]['key']);
+            $helpURL = trim((string) $help[0]['url']);
+
+            $this->helpKey = $helpKey ?: $this->helpKey;
+            $this->helpURL = $helpURL ?: $this->helpURL;
+        }
+
+        // Trigger the default form events.
+        parent::preprocessForm($form, $data, $group);
+    }
+
+    /**
+     * Method to save the form data.
+     *
+     * @param   array  $data  The form data.
+     *
+     * @return  boolean  True on success.
+     */
+    public function save($data)
+    {
+        // Detect disabled extension
+        $extension = Table::getInstance('Extension', 'Joomla\\CMS\\Table\\');
+
+        if ($extension->load(['enabled' => 0, 'type' => 'template', 'element' => $data['template'], 'client_id' => $data['client_id']])) {
+            $this->setError(Text::_('COM_TEMPLATES_ERROR_SAVE_DISABLED_TEMPLATE'));
+
+            return false;
+        }
+
+        $app        = Factory::getApplication();
+        $table      = $this->getTable();
+        $pk         = (!empty($data['id'])) ? $data['id'] : (int) $this->getState('style.id');
+        $isNew      = true;
+
+        // Include the extension plugins for the save events.
+        PluginHelper::importPlugin($this->events_map['save']);
+
+        // Load the row if saving an existing record.
+        if ($pk > 0) {
+            $table->load($pk);
+            $isNew = false;
+        }
+
+        if ($app->getInput()->get('task') == 'save2copy') {
+            $data['title']    = $this->generateNewTitle(null, null, $data['title']);
+            $data['home']     = 0;
+            $data['assigned'] = '';
+        }
+
+        // Bind the data.
+        if (!$table->bind($data)) {
+            $this->setError($table->getError());
+
+            return false;
+        }
+
+        // Prepare the row for saving
+        $this->prepareTable($table);
+
+        // Check the data.
+        if (!$table->check()) {
+            $this->setError($table->getError());
+
+            return false;
+        }
+
+        // Trigger the before save event.
+        $result = Factory::getApplication()->triggerEvent($this->event_before_save, ['com_templates.style', &$table, $isNew]);
+
+        // Store the data.
+        if (\in_array(false, $result, true) || !$table->store()) {
+            $this->setError($table->getError());
+
+            return false;
+        }
+
+        $user = $this->getCurrentUser();
+
+        if ($user->authorise('core.edit', 'com_menus') && $table->client_id == 0) {
+            $n       = 0;
+            $db      = $this->getDatabase();
+            $user    = $this->getCurrentUser();
+            $tableId = (int) $table->id;
+            $userId  = (int) $user->id;
+
+            if (!empty($data['assigned']) && \is_array($data['assigned'])) {
+                $data['assigned'] = ArrayHelper::toInteger($data['assigned']);
+
+                // Update the mapping for menu items that this style IS assigned to.
+                $query = $db->getQuery(true)
+                    ->update($db->quoteName('#__menu'))
+                    ->set($db->quoteName('template_style_id') . ' = :newtsid')
+                    ->whereIn($db->quoteName('id'), $data['assigned'])
+                    ->where($db->quoteName('template_style_id') . ' != :tsid')
+                    ->where('(' . $db->quoteName('checked_out') . ' IS NULL OR ' . $db->quoteName('checked_out') . ' = :userid)')
+                    ->bind(':userid', $userId, ParameterType::INTEGER)
+                    ->bind(':newtsid', $tableId, ParameterType::INTEGER)
+                    ->bind(':tsid', $tableId, ParameterType::INTEGER);
+                $db->setQuery($query);
+                $db->execute();
+                $n += $db->getAffectedRows();
+            }
+
+            // Remove style mappings for menu items this style is NOT assigned to.
+            // If unassigned then all existing maps will be removed.
+            $query = $db->getQuery(true)
+                ->update($db->quoteName('#__menu'))
+                ->set($db->quoteName('template_style_id') . ' = 0');
+
+            if (!empty($data['assigned'])) {
+                $query->whereNotIn($db->quoteName('id'), $data['assigned']);
+            }
+
+            $query->where($db->quoteName('template_style_id') . ' = :templatestyleid')
+                ->where('(' . $db->quoteName('checked_out') . ' IS NULL OR ' . $db->quoteName('checked_out') . ' = :userid)')
+                ->bind(':userid', $userId, ParameterType::INTEGER)
+                ->bind(':templatestyleid', $tableId, ParameterType::INTEGER);
+            $db->setQuery($query);
+            $db->execute();
+
+            $n += $db->getAffectedRows();
+
+            if ($n > 0) {
+                $app->enqueueMessage(Text::plural('COM_TEMPLATES_MENU_CHANGED', $n));
+            }
+        }
+
+        // Clean the cache.
+        $this->cleanCache();
+
+        // Trigger the after save event.
+        Factory::getApplication()->triggerEvent($this->event_after_save, ['com_templates.style', &$table, $isNew]);
+
+        $this->setState('style.id', $table->id);
+
+        return true;
+    }
+
+    /**
+     * Method to set a template style as home.
+     *
+     * @param   integer  $id  The primary key ID for the style.
+     *
+     * @return  boolean  True if successful.
+     *
+     * @throws  \Exception
+     */
+    public function setHome($id = 0)
+    {
+        $user = $this->getCurrentUser();
+        $db   = $this->getDatabase();
+
+        // Access checks.
+        if (!$user->authorise('core.edit.state', 'com_templates')) {
+            throw new \Exception(Text::_('JLIB_APPLICATION_ERROR_EDITSTATE_NOT_PERMITTED'));
+        }
+
+        $style = $this->getTable();
+
+        if (!$style->load((int) $id)) {
+            throw new \Exception(Text::_('COM_TEMPLATES_ERROR_STYLE_NOT_FOUND'));
+        }
+
+        // Detect disabled extension
+        $extension = Table::getInstance('Extension', 'Joomla\\CMS\\Table\\');
+
+        if ($extension->load(['enabled' => 0, 'type' => 'template', 'element' => $style->template, 'client_id' => $style->client_id])) {
+            throw new \Exception(Text::_('COM_TEMPLATES_ERROR_SAVE_DISABLED_TEMPLATE'));
+        }
+
+        $clientId = (int) $style->client_id;
+        $id       = (int) $id;
+
+        // Reset the home fields for the client_id.
+        $query = $db->getQuery(true)
+            ->update($db->quoteName('#__template_styles'))
+            ->set($db->quoteName('home') . ' = ' . $db->quote('0'))
+            ->where($db->quoteName('client_id') . ' = :clientid')
+            ->where($db->quoteName('home') . ' = ' . $db->quote('1'))
+            ->bind(':clientid', $clientId, ParameterType::INTEGER);
+        $db->setQuery($query);
+        $db->execute();
+
+        // Set the new home style.
+        $query = $db->getQuery(true)
+            ->update($db->quoteName('#__template_styles'))
+            ->set($db->quoteName('home') . ' = ' . $db->quote('1'))
+            ->where($db->quoteName('id') . ' = :id')
+            ->bind(':id', $id, ParameterType::INTEGER);
+        $db->setQuery($query);
+        $db->execute();
+
+        // Clean the cache.
+        $this->cleanCache();
+
+        return true;
+    }
+
+    /**
+     * Method to unset a template style as default for a language.
+     *
+     * @param   integer  $id  The primary key ID for the style.
+     *
+     * @return  boolean  True if successful.
+     *
+     * @throws  \Exception
+     */
+    public function unsetHome($id = 0)
+    {
+        $user = $this->getCurrentUser();
+        $db   = $this->getDatabase();
+
+        // Access checks.
+        if (!$user->authorise('core.edit.state', 'com_templates')) {
+            throw new \Exception(Text::_('JLIB_APPLICATION_ERROR_EDITSTATE_NOT_PERMITTED'));
+        }
+
+        $id = (int) $id;
+
+        // Lookup the client_id.
+        $query = $db->getQuery(true)
+            ->select($db->quoteName(['client_id', 'home']))
+            ->from($db->quoteName('#__template_styles'))
+            ->where($db->quoteName('id') . ' = :id')
+            ->bind(':id', $id, ParameterType::INTEGER);
+        $db->setQuery($query);
+        $style = $db->loadObject();
+
+        if (!is_numeric($style->client_id)) {
+            throw new \Exception(Text::_('COM_TEMPLATES_ERROR_STYLE_NOT_FOUND'));
+        }
+
+        if ($style->home == '1') {
+            throw new \Exception(Text::_('COM_TEMPLATES_ERROR_CANNOT_UNSET_DEFAULT_STYLE'));
+        }
+
+        // Set the new home style.
+        $query = $db->getQuery(true)
+            ->update($db->quoteName('#__template_styles'))
+            ->set($db->quoteName('home') . ' = ' . $db->quote('0'))
+            ->where($db->quoteName('id') . ' = :id')
+            ->bind(':id', $id, ParameterType::INTEGER);
+        $db->setQuery($query);
+        $db->execute();
+
+        // Clean the cache.
+        $this->cleanCache();
+
+        return true;
+    }
+
+    /**
+     * Get the necessary data to load an item help screen.
+     *
+     * @return  object  An object with key, url, and local properties for loading the item help screen.
+     *
+     * @since   1.6
+     */
+    public function getHelp()
+    {
+        return (object) ['key' => $this->helpKey, 'url' => $this->helpURL];
+    }
+
+    /**
+     * Returns the back end template for the given style.
+     *
+     * @param   int  $styleId  The style id
+     *
+     * @return  \stdClass
+     *
+     * @since   4.2.0
+     */
+    public function getAdminTemplate(int $styleId): \stdClass
+    {
+        $db    = $this->getDatabase();
+        $query = $db->getQuery(true)
+            ->select($db->quoteName(['s.template', 's.params', 's.inheritable', 's.parent']))
+            ->from($db->quoteName('#__template_styles', 's'))
+            ->join(
+                'LEFT',
+                $db->quoteName('#__extensions', 'e'),
+                $db->quoteName('e.type') . ' = ' . $db->quote('template')
+                    . ' AND ' . $db->quoteName('e.element') . ' = ' . $db->quoteName('s.template')
+                    . ' AND ' . $db->quoteName('e.client_id') . ' = ' . $db->quoteName('s.client_id')
+            )
+            ->where(
+                [
+                    $db->quoteName('s.client_id') . ' = 1',
+                    $db->quoteName('s.home') . ' = ' . $db->quote('1'),
+                ]
+            );
+
+        if ($styleId) {
+            $query->extendWhere(
+                'OR',
+                [
+                    $db->quoteName('s.client_id') . ' = 1',
+                    $db->quoteName('s.id') . ' = :style',
+                    $db->quoteName('e.enabled') . ' = 1',
+                ]
+            )
+                ->bind(':style', $styleId, ParameterType::INTEGER);
+        }
+
+        $query->order($db->quoteName('s.home'));
+        $db->setQuery($query);
+
+        return $db->loadObject();
+    }
+
+    /**
+     * Returns the front end templates.
+     *
+     * @return  array
+     *
+     * @since   4.2.0
+     */
+    public function getSiteTemplates(): array
+    {
+        $db    = $this->getDatabase();
+        $query = $db->getQuery(true)
+            ->select($db->quoteName(['id', 'home', 'template', 's.params', 'inheritable', 'parent']))
+            ->from($db->quoteName('#__template_styles', 's'))
+            ->where(
+                [
+                    $db->quoteName('s.client_id') . ' = 0',
+                    $db->quoteName('e.enabled') . ' = 1',
+                ]
+            )
+            ->join(
+                'LEFT',
+                $db->quoteName('#__extensions', 'e'),
+                $db->quoteName('e.element') . ' = ' . $db->quoteName('s.template')
+                    . ' AND ' . $db->quoteName('e.type') . ' = ' . $db->quote('template')
+                    . ' AND ' . $db->quoteName('e.client_id') . ' = ' . $db->quoteName('s.client_id')
+            );
+
+        $db->setQuery($query);
+
+        return $db->loadObjectList('id');
+    }
+
+    /**
+     * Custom clean cache method
+     *
+     * @param   string   $group     The cache group
+     * @param   integer  $clientId  No longer used, will be removed without replacement
+     *                              @deprecated   4.3 will be removed in 6.0
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    protected function cleanCache($group = null, $clientId = 0)
+    {
+        parent::cleanCache('com_templates');
+        parent::cleanCache('_system');
+    }
+}

administrator/components/com_templates/src/Model/StylesModel.php

@@ -0,0 +1,254 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Model;
+
+use Joomla\CMS\Component\ComponentHelper;
+use Joomla\CMS\Factory;
+use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
+use Joomla\CMS\MVC\Model\ListModel;
+use Joomla\Database\ParameterType;
+use Joomla\Database\QueryInterface;
+use Joomla\String\StringHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Methods supporting a list of template style records.
+ *
+ * @since  1.6
+ */
+class StylesModel extends ListModel
+{
+    /**
+     * Constructor.
+     *
+     * @param   array                 $config   An optional associative array of configuration settings.
+     * @param   ?MVCFactoryInterface  $factory  The factory.
+     *
+     * @see     \Joomla\CMS\MVC\Model\BaseDatabaseModel
+     * @since   3.2
+     */
+    public function __construct($config = [], ?MVCFactoryInterface $factory = null)
+    {
+        if (empty($config['filter_fields'])) {
+            $config['filter_fields'] = [
+                'id', 'a.id',
+                'title', 'a.title',
+                'template', 'a.template',
+                'home', 'a.home',
+                'menuitem',
+            ];
+        }
+
+        parent::__construct($config, $factory);
+    }
+
+    /**
+     * Method to auto-populate the model state.
+     *
+     * Note. Calling getState in this method will result in recursion.
+     *
+     * @param   string  $ordering   An optional ordering field.
+     * @param   string  $direction  An optional direction (asc|desc).
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    protected function populateState($ordering = 'a.template', $direction = 'asc')
+    {
+        $app = Factory::getApplication();
+
+        if (!$app->isClient('api')) {
+            // Special case for the client id.
+            $clientId = (int) $this->getUserStateFromRequest($this->context . '.client_id', 'client_id', 0, 'int');
+            $clientId = !\in_array($clientId, [0, 1]) ? 0 : $clientId;
+            $this->setState('client_id', $clientId);
+        }
+
+        // Load the parameters.
+        $params = ComponentHelper::getParams('com_templates');
+        $this->setState('params', $params);
+
+        // List state information.
+        parent::populateState($ordering, $direction);
+    }
+
+    /**
+     * Method to get a store id based on model configuration state.
+     *
+     * This is necessary because the model is used by the component and
+     * different modules that might need different sets of data or different
+     * ordering requirements.
+     *
+     * @param   string  $id  A prefix for the store id.
+     *
+     * @return  string  A store id.
+     */
+    protected function getStoreId($id = '')
+    {
+        // Compile the store id.
+        $id .= ':' . $this->getState('client_id');
+        $id .= ':' . $this->getState('filter.search');
+        $id .= ':' . $this->getState('filter.template');
+        $id .= ':' . $this->getState('filter.menuitem');
+
+        return parent::getStoreId($id);
+    }
+
+    /**
+     * Build an SQL query to load the list data.
+     *
+     * @return  QueryInterface
+     */
+    protected function getListQuery()
+    {
+        $clientId = (int) $this->getState('client_id');
+
+        // Create a new query object.
+        $db    = $this->getDatabase();
+        $query = $db->getQuery(true);
+
+        // Select the required fields from the table.
+        $query->select(
+            $this->getState(
+                'list.select',
+                [
+                    $db->quoteName('a.id'),
+                    $db->quoteName('a.template'),
+                    $db->quoteName('a.title'),
+                    $db->quoteName('a.home'),
+                    $db->quoteName('a.client_id'),
+                    $db->quoteName('l.title', 'language_title'),
+                    $db->quoteName('l.image'),
+                    $db->quoteName('l.sef', 'language_sef'),
+                ]
+            )
+        )
+            ->select(
+                [
+                    'COUNT(' . $db->quoteName('m.template_style_id') . ') AS assigned',
+                    $db->quoteName('extension_id', 'e_id'),
+                ]
+            )
+            ->from($db->quoteName('#__template_styles', 'a'))
+            ->where($db->quoteName('a.client_id') . ' = :clientid')
+            ->bind(':clientid', $clientId, ParameterType::INTEGER);
+
+        // Join on menus.
+        $query->join('LEFT', $db->quoteName('#__menu', 'm'), $db->quoteName('m.template_style_id') . ' = ' . $db->quoteName('a.id'))
+            ->group(
+                [
+                    $db->quoteName('a.id'),
+                    $db->quoteName('a.template'),
+                    $db->quoteName('a.title'),
+                    $db->quoteName('a.home'),
+                    $db->quoteName('a.client_id'),
+                    $db->quoteName('l.title'),
+                    $db->quoteName('l.image'),
+                    $db->quoteName('l.sef'),
+                    $db->quoteName('e.extension_id'),
+                ]
+            );
+
+        // Join over the language.
+        $query->join('LEFT', $db->quoteName('#__languages', 'l'), $db->quoteName('l.lang_code') . ' = ' . $db->quoteName('a.home'));
+
+        // Filter by extension enabled.
+        $query->join(
+            'LEFT',
+            $db->quoteName('#__extensions', 'e'),
+            $db->quoteName('e.element') . ' = ' . $db->quoteName('a.template')
+                . ' AND ' . $db->quoteName('e.client_id') . ' = ' . $db->quoteName('a.client_id')
+        )
+            ->where(
+                [
+                    $db->quoteName('e.enabled') . ' = 1',
+                    $db->quoteName('e.type') . ' = ' . $db->quote('template'),
+                ]
+            );
+
+        // Filter by template.
+        if ($template = $this->getState('filter.template')) {
+            $query->where($db->quoteName('a.template') . ' = :template')
+                ->bind(':template', $template);
+        }
+
+        // Filter by menuitem.
+        $menuItemId = $this->getState('filter.menuitem');
+
+        if ($clientId === 0 && is_numeric($menuItemId)) {
+            // If user selected the templates styles that are not assigned to any page.
+            if ((int) $menuItemId === -1) {
+                // Only custom template styles overrides not assigned to any menu item.
+                $query->where(
+                    [
+                        $db->quoteName('a.home') . ' = ' . $db->quote('0'),
+                        $db->quoteName('m.id') . ' IS NULL',
+                    ]
+                );
+            } else {
+                // If user selected the templates styles assigned to particular pages.
+                // Subquery to get the language of the selected menu item.
+                $menuItemId               = (int) $menuItemId;
+                $menuItemLanguageSubQuery = $db->getQuery(true);
+                $menuItemLanguageSubQuery->select($db->quoteName('language'))
+                    ->from($db->quoteName('#__menu'))
+                    ->where($db->quoteName('id') . ' = :menuitemid');
+                $query->bind(':menuitemid', $menuItemId, ParameterType::INTEGER);
+
+                // Subquery to get the language of the selected menu item.
+                $templateStylesMenuItemsSubQuery = $db->getQuery(true);
+                $templateStylesMenuItemsSubQuery->select($db->quoteName('id'))
+                    ->from($db->quoteName('#__menu'))
+                    ->where($db->quoteName('template_style_id') . ' = ' . $db->quoteName('a.id'));
+
+                // Main query where clause.
+                $query->where('(' .
+                    // Default template style (fallback template style to all menu items).
+                    $db->quoteName('a.home') . ' = ' . $db->quote('1') . ' OR ' .
+                    // Default template style for specific language (fallback template style to the selected menu item language).
+                    $db->quoteName('a.home') . ' IN (' . $menuItemLanguageSubQuery . ') OR ' .
+                    // Custom template styles override (only if assigned to the selected menu item).
+                    '(' . $db->quoteName('a.home') . ' = ' . $db->quote('0') . ' AND ' . $menuItemId . ' IN (' . $templateStylesMenuItemsSubQuery . '))' .
+                    ')');
+            }
+        }
+
+        // Filter by search in title.
+        if ($search = $this->getState('filter.search')) {
+            if (stripos($search, 'id:') === 0) {
+                $ids = (int) substr($search, 3);
+                $query->where($db->quoteName('a.id') . ' = :id');
+                $query->bind(':id', $ids, ParameterType::INTEGER);
+            } else {
+                $search = '%' . StringHelper::strtolower($search) . '%';
+                $query->extendWhere(
+                    'AND',
+                    [
+                        'LOWER(' . $db->quoteName('a.template') . ') LIKE :templatesearch',
+                        'LOWER(' . $db->quoteName('a.title') . ') LIKE :title',
+                    ],
+                    'OR'
+                )
+                    ->bind(':templatesearch', $search)
+                    ->bind(':title', $search);
+            }
+        }
+
+        // Add the list ordering clause.
+        $query->order($db->escape($this->getState('list.ordering', 'a.template')) . ' ' . $db->escape($this->getState('list.direction', 'ASC')));
+
+        return $query;
+    }
+}

administrator/components/com_templates/src/Model/TemplatesModel.php

@@ -0,0 +1,221 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2008 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Model;
+
+use Joomla\CMS\Application\ApplicationHelper;
+use Joomla\CMS\Component\ComponentHelper;
+use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
+use Joomla\CMS\MVC\Model\ListModel;
+use Joomla\Component\Templates\Administrator\Helper\TemplatesHelper;
+use Joomla\Database\ParameterType;
+use Joomla\Database\QueryInterface;
+use Joomla\String\StringHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Methods supporting a list of template extension records.
+ *
+ * @since  1.6
+ */
+class TemplatesModel extends ListModel
+{
+    /**
+     * Constructor.
+     *
+     * @param   array                 $config   An optional associative array of configuration settings.
+     * @param   ?MVCFactoryInterface  $factory  The factory.
+     *
+     * @see     \Joomla\CMS\MVC\Model\BaseDatabaseModel
+     * @since   3.2
+     */
+    public function __construct($config = [], ?MVCFactoryInterface $factory = null)
+    {
+        if (empty($config['filter_fields'])) {
+            $config['filter_fields'] = [
+                'id', 'a.id',
+                'name', 'a.name',
+                'folder', 'a.folder',
+                'element', 'a.element',
+                'checked_out', 'a.checked_out',
+                'checked_out_time', 'a.checked_out_time',
+                'state', 'a.state',
+                'enabled', 'a.enabled',
+                'ordering', 'a.ordering',
+            ];
+        }
+
+        parent::__construct($config, $factory);
+    }
+
+    /**
+     * Override parent getItems to add extra XML metadata.
+     *
+     * @return  array
+     *
+     * @since   1.6
+     */
+    public function getItems()
+    {
+        $items = parent::getItems();
+
+        foreach ($items as &$item) {
+            $client        = ApplicationHelper::getClientInfo($item->client_id);
+            $item->xmldata = TemplatesHelper::parseXMLTemplateFile($client->path, $item->element);
+            $num           = $this->updated($item->extension_id);
+
+            if ($num) {
+                $item->updated = $num;
+            }
+        }
+
+        return $items;
+    }
+
+    /**
+     * Check if template extension have any updated override.
+     *
+     * @param   integer  $exid  Extension id of template.
+     *
+     * @return   boolean  False if records not found/else integer.
+     *
+     * @since   4.0.0
+     */
+    public function updated($exid)
+    {
+        $db = $this->getDatabase();
+
+        // Select the required fields from the table
+        $query = $db->getQuery(true)
+            ->select($db->quoteName('template'))
+            ->from($db->quoteName('#__template_overrides'))
+            ->where($db->quoteName('extension_id') . ' = :extensionid')
+            ->where($db->quoteName('state') . ' = 0')
+            ->bind(':extensionid', $exid, ParameterType::INTEGER);
+
+        // Reset the query.
+        $db->setQuery($query);
+
+        // Load the results as a list of stdClass objects.
+        $num = \count($db->loadObjectList());
+
+        if ($num > 0) {
+            return $num;
+        }
+
+        return false;
+    }
+
+    /**
+     * Build an SQL query to load the list data.
+     *
+     * @return  QueryInterface
+     *
+     * @since   1.6
+     */
+    protected function getListQuery()
+    {
+        // Create a new query object.
+        $db    = $this->getDatabase();
+        $query = $db->getQuery(true);
+
+        // Select the required fields from the table.
+        $query->select(
+            $this->getState(
+                'list.select',
+                'a.extension_id, a.name, a.element, a.client_id'
+            )
+        );
+        $clientId = (int) $this->getState('client_id');
+        $query->from($db->quoteName('#__extensions', 'a'))
+            ->where($db->quoteName('a.client_id') . ' = :clientid')
+            ->where($db->quoteName('a.enabled') . ' = 1')
+            ->where($db->quoteName('a.type') . ' = ' . $db->quote('template'))
+            ->bind(':clientid', $clientId, ParameterType::INTEGER);
+
+        // Filter by search in title.
+        if ($search = $this->getState('filter.search')) {
+            if (stripos($search, 'id:') === 0) {
+                $ids = (int) substr($search, 3);
+                $query->where($db->quoteName('a.id') . ' = :id');
+                $query->bind(':id', $ids, ParameterType::INTEGER);
+            } else {
+                $search = '%' . StringHelper::strtolower($search) . '%';
+                $query->extendWhere(
+                    'AND',
+                    [
+                        'LOWER(' . $db->quoteName('a.element') . ') LIKE :element',
+                        'LOWER(' .  $db->quoteName('a.name') . ') LIKE :name',
+                    ],
+                    'OR'
+                )
+                    ->bind(':element', $search)
+                    ->bind(':name', $search);
+            }
+        }
+
+        // Add the list ordering clause.
+        $query->order($db->escape($this->getState('list.ordering', 'a.element')) . ' ' . $db->escape($this->getState('list.direction', 'ASC')));
+
+        return $query;
+    }
+
+    /**
+     * Method to get a store id based on model configuration state.
+     *
+     * This is necessary because the model is used by the component and
+     * different modules that might need different sets of data or different
+     * ordering requirements.
+     *
+     * @param   string  $id  A prefix for the store id.
+     *
+     * @return  string  A store id.
+     *
+     * @since   1.6
+     */
+    protected function getStoreId($id = '')
+    {
+        // Compile the store id.
+        $id .= ':' . $this->getState('client_id');
+        $id .= ':' . $this->getState('filter.search');
+
+        return parent::getStoreId($id);
+    }
+
+    /**
+     * Method to auto-populate the model state.
+     *
+     * Note. Calling getState in this method will result in recursion.
+     *
+     * @param   string  $ordering   An optional ordering field.
+     * @param   string  $direction  An optional direction (asc|desc).
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    protected function populateState($ordering = 'a.element', $direction = 'asc')
+    {
+        // Special case for the client id.
+        $clientId = (int) $this->getUserStateFromRequest($this->context . '.client_id', 'client_id', 0, 'int');
+        $clientId = (!\in_array($clientId, [0, 1])) ? 0 : $clientId;
+        $this->setState('client_id', $clientId);
+
+        // Load the parameters.
+        $params = ComponentHelper::getParams('com_templates');
+        $this->setState('params', $params);
+
+        // List state information.
+        parent::populateState($ordering, $direction);
+    }
+}

administrator/components/com_templates/src/Service/HTML/Templates.php

@@ -0,0 +1,165 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Service\HTML;
+
+use Joomla\CMS\Application\ApplicationHelper;
+use Joomla\CMS\HTML\HTMLHelper;
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\Uri\Uri;
+use Joomla\Component\Templates\Administrator\Helper\TemplatesHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Html helper class.
+ *
+ * @since  1.6
+ */
+class Templates
+{
+    /**
+     * Display the thumb for the template.
+     *
+     * @param   string|object  $template  The name of the template or the template object.
+     *                                    @deprecated   4.3 will be removed in 6.0
+     *                                    The argument $template must be an object only
+     * @param   integer        $clientId  No longer used, will be removed without replacement
+     *                                    @deprecated   4.3 will be removed in 6.0
+     *
+     * @return  string  The html string
+     *
+     * @since   1.6
+     */
+    public function thumb($template, $clientId = 0)
+    {
+        if (\is_string($template)) {
+            return HTMLHelper::_('image', 'template_thumbnail.png', Text::_('COM_TEMPLATES_PREVIEW'), [], true, -1);
+        }
+
+        $client = ApplicationHelper::getClientInfo($template->client_id);
+
+        if (!isset($template->xmldata)) {
+            $template->xmldata = TemplatesHelper::parseXMLTemplateFile($client->id === 0 ? JPATH_ROOT : JPATH_ROOT . '/administrator', $template->name);
+        }
+
+        if ((isset($template->xmldata->inheritable) && (bool) $template->xmldata->inheritable) || isset($template->xmldata->parent)) {
+            if (isset($template->xmldata->parent) && (string) $template->xmldata->parent !== '' && file_exists(JPATH_ROOT . '/media/templates/' . $client->name . '/' . (string) $template->xmldata->parent . '/images/template_thumbnail.png')) {
+                if (file_exists(JPATH_ROOT . '/media/templates/' . $client->name . '/' . $template->element . '/images/template_preview.png')) {
+                    $html = HTMLHelper::_('image', 'media/templates/' . $client->name . '/' . $template->element . '/images/template_thumbnail.png', Text::_('COM_TEMPLATES_PREVIEW'));
+                    $html = '<button type="button" data-bs-target="#' . $template->element . '-Modal" class="thumbnail" data-bs-toggle="modal" title="' . Text::_('COM_TEMPLATES_CLICK_TO_ENLARGE') . '">' . $html . '</button>';
+                } elseif ((file_exists(JPATH_ROOT . '/media/templates/' . $client->name . '/' . (string) $template->xmldata->parent . '/images/template_preview.png'))) {
+                    $html = HTMLHelper::_('image', 'media/templates/' . $client->name . '/' . (string) $template->xmldata->parent . '/images/template_thumbnail.png', Text::_('COM_TEMPLATES_PREVIEW'));
+                    $html = '<button type="button" data-bs-target="#' . $template->element . '-Modal" class="thumbnail" data-bs-toggle="modal" title="' . Text::_('COM_TEMPLATES_CLICK_TO_ENLARGE') . '">' . $html . '</button>';
+                } else {
+                    $html = HTMLHelper::_('image', 'template_thumb.svg', Text::_('COM_TEMPLATES_PREVIEW'), ['style' => 'width:200px; height:120px;']);
+                }
+            } elseif (file_exists(JPATH_ROOT . '/media/templates/' . $client->name . '/' . $template->element . '/images/template_thumbnail.png')) {
+                $html = HTMLHelper::_('image', 'media/templates/' . $client->name . '/' . $template->element . '/images/template_thumbnail.png', Text::_('COM_TEMPLATES_PREVIEW'));
+
+                if (file_exists(JPATH_ROOT . '/media/templates/' . $client->name . '/' . $template->element . '/images/template_preview.png')) {
+                    $html = '<button type="button" data-bs-target="#' . $template->element . '-Modal" class="thumbnail" data-bs-toggle="modal" title="' . Text::_('COM_TEMPLATES_CLICK_TO_ENLARGE') . '">' . $html . '</button>';
+                }
+            } else {
+                $html = HTMLHelper::_('image', 'template_thumb.svg', Text::_('COM_TEMPLATES_PREVIEW'), ['style' => 'width:200px; height:120px;']);
+            }
+        } elseif (file_exists($client->path . '/templates/' . $template->element . '/template_thumbnail.png')) {
+            $html = HTMLHelper::_('image', (($template->client_id == 0) ? Uri::root(true) : Uri::root(true) . '/administrator/') . '/templates/' . $template->element . '/template_thumbnail.png', Text::_('COM_TEMPLATES_PREVIEW'), [], false, -1);
+
+            if (file_exists($client->path . '/templates/' . $template->element . '/template_preview.png')) {
+                $html = '<button type="button" data-bs-target="#' . $template->element . '-Modal" class="thumbnail" data-bs-toggle="modal" title="' . Text::_('COM_TEMPLATES_CLICK_TO_ENLARGE') . '">' . $html . '</button>';
+            }
+        } else {
+            $html = HTMLHelper::_('image', 'template_thumb.svg', Text::_('COM_TEMPLATES_PREVIEW'), ['style' => 'width:200px; height:120px;']);
+        }
+
+        return $html;
+    }
+
+    /**
+     * Renders the html for the modal linked to thumb.
+     *
+     * @param   string|object  $template  The name of the template or the template object.
+     *                                    @deprecated   4.3 will be removed in 6.0
+     *                                    The argument $template must be an object only
+     * @param   integer        $clientId  No longer used, will be removed without replacement
+     *                                    @deprecated   4.3 will be removed in 6.0
+     *
+     * @return  string  The html string
+     *
+     * @since   3.4
+     */
+    public function thumbModal($template, $clientId = 0)
+    {
+        if (\is_string($template)) {
+            return HTMLHelper::_('image', 'template_thumbnail.png', Text::_('COM_TEMPLATES_PREVIEW'), [], true, -1);
+        }
+
+        $html    = '';
+        $thumb   = '';
+        $preview = '';
+        $client  = ApplicationHelper::getClientInfo($template->client_id);
+
+        if (!isset($template->xmldata)) {
+            $template->xmldata = TemplatesHelper::parseXMLTemplateFile($client->id === 0 ? JPATH_ROOT : JPATH_ROOT . '/administrator', $template->name);
+        }
+
+        if ((isset($template->xmldata->inheritable) && (bool) $template->xmldata->inheritable) || isset($template->xmldata->parent)) {
+            if (isset($template->xmldata->parent) && (string) $template->xmldata->parent !== '') {
+                if (file_exists(JPATH_ROOT . '/media/templates/' . $client->name . '/' . $template->element . '/images/template_thumbnail.png')) {
+                    $thumb = ($template->client_id == 0 ? Uri::root(true) : Uri::root(true) . 'administrator') . 'media/templates/' . $client->name . '/' . $template->element . '/images/template_thumbnail.png';
+
+                    if (file_exists(JPATH_ROOT . '/media/templates/' . $client->name . '/' . $template->element . '/images/template_preview.png')) {
+                        $preview = ($template->client_id == 0 ? Uri::root(true) : Uri::root(true) . '/administrator') . '/media/templates/' . $client->name . '/' . $template->element . '/images/template_preview.png';
+                    }
+                } else {
+                    $thumb = ($template->client_id == 0 ? Uri::root(true) : Uri::root(true) . 'administrator') . 'media/templates/' . $client->name . '/' . (string) $template->xmldata->parent . '/images/template_thumbnail.png';
+
+                    if (file_exists(JPATH_ROOT . '/media/templates/' . $client->name . '/' . (string) $template->xmldata->parent . '/images/template_preview.png')) {
+                        $preview = ($template->client_id == 0 ? Uri::root(true) : Uri::root(true) . '/administrator') . '/media/templates/' . $client->name . '/' . (string) $template->xmldata->parent . '/images/template_preview.png';
+                    }
+                }
+            } elseif (file_exists(JPATH_ROOT . '/media/templates/' . $client->name . '/' . $template->element . '/images/template_thumbnail.png')) {
+                $thumb = ($template->client_id == 0 ? Uri::root(true) : Uri::root(true) . '/administrator') . '/media/templates/' . $client->name . '/' . $template->element . '/images/template_thumbnail.png';
+
+                if (file_exists(JPATH_ROOT . '/media/templates/' . $client->name . '/' . $template->element . '/images/template_preview.png')) {
+                    $preview = Uri::root(true) . '/media/templates/' . $client->name . '/' . $template->element . '/images/template_preview.png';
+                }
+            }
+        } elseif (file_exists($client->path . '/templates/' . $template->element . '/template_thumbnail.png')) {
+            $thumb = (($template->client_id == 0) ? Uri::root(true) : Uri::root(true) . 'administrator') . '/templates/' . $template->element . '/template_thumbnail.png';
+
+            if (file_exists($client->path . '/templates/' . $template->element . '/template_preview.png')) {
+                $preview = (($template->client_id == 0) ? Uri::root(true) : Uri::root(true) . '/administrator') . '/templates/' . $template->element . '/template_preview.png';
+            }
+        }
+
+        if ($thumb !== '' && $preview !== '') {
+            $footer = '<button type="button" class="btn btn-secondary" data-bs-dismiss="modal">'
+                . Text::_('JTOOLBAR_CLOSE') . '</button>';
+
+            $html .= HTMLHelper::_(
+                'bootstrap.renderModal',
+                $template->element . '-Modal',
+                [
+                    'title'  => Text::sprintf('COM_TEMPLATES_SCREENSHOT', ucfirst($template->name)),
+                    'height' => '500px',
+                    'width'  => '800px',
+                    'footer' => $footer,
+                ],
+                '<div><img src="' . $preview . '" class="mw-100" alt="' . $template->name . '"></div>'
+            );
+        }
+
+        return $html;
+    }
+}

administrator/components/com_templates/src/Table/StyleTable.php

@@ -0,0 +1,159 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\Table;
+
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\Table\Table;
+use Joomla\Database\DatabaseDriver;
+use Joomla\Database\ParameterType;
+use Joomla\Event\DispatcherInterface;
+use Joomla\Registry\Registry;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Template style table class.
+ *
+ * @since  1.6
+ */
+class StyleTable extends Table
+{
+    /**
+     * Constructor
+     *
+     * @param   DatabaseDriver        $db          Database connector object
+     * @param   ?DispatcherInterface  $dispatcher  Event dispatcher for this table
+     *
+     * @since   1.6
+     */
+    public function __construct(DatabaseDriver $db, ?DispatcherInterface $dispatcher = null)
+    {
+        parent::__construct('#__template_styles', 'id', $db, $dispatcher);
+    }
+
+    /**
+     * Overloaded bind function to pre-process the params.
+     *
+     * @param   array  $array   Named array
+     * @param   mixed  $ignore  An optional array or space separated list of properties to ignore while binding.
+     *
+     * @return  null|string null if operation was satisfactory, otherwise returns an error
+     *
+     * @since   1.6
+     */
+    public function bind($array, $ignore = '')
+    {
+        if (isset($array['params']) && \is_array($array['params'])) {
+            $registry        = new Registry($array['params']);
+            $array['params'] = (string) $registry;
+        }
+
+        // Verify that the default style is not unset
+        if ($array['home'] == '0' && $this->home == '1') {
+            $this->setError(Text::_('COM_TEMPLATES_ERROR_CANNOT_UNSET_DEFAULT_STYLE'));
+
+            return false;
+        }
+
+        return parent::bind($array, $ignore);
+    }
+
+    /**
+     * Overloaded check method to ensure data integrity.
+     *
+     * @return  boolean  True on success.
+     *
+     * @since   1.6
+     */
+    public function check()
+    {
+        try {
+            parent::check();
+        } catch (\Exception $e) {
+            $this->setError($e->getMessage());
+
+            return false;
+        }
+
+        if (empty($this->title)) {
+            $this->setError(Text::_('COM_TEMPLATES_ERROR_STYLE_REQUIRES_TITLE'));
+
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Overloaded store method to ensure unicity of default style.
+     *
+     * @param   boolean  $updateNulls  True to update fields even if they are null.
+     *
+     * @return  boolean  True on success.
+     *
+     * @since   1.6
+     */
+    public function store($updateNulls = false)
+    {
+        if ($this->home != '0') {
+            $clientId = (int) $this->client_id;
+            $query    = $this->_db->getQuery(true)
+                ->update($this->_db->quoteName('#__template_styles'))
+                ->set($this->_db->quoteName('home') . ' = ' . $this->_db->quote('0'))
+                ->where($this->_db->quoteName('client_id') . ' = :clientid')
+                ->where($this->_db->quoteName('home') . ' = :home')
+                ->bind(':clientid', $clientId, ParameterType::INTEGER)
+                ->bind(':home', $this->home);
+            $this->_db->setQuery($query);
+            $this->_db->execute();
+        }
+
+        return parent::store($updateNulls);
+    }
+
+    /**
+     * Overloaded store method to unsure existence of a default style for a template.
+     *
+     * @param   mixed  $pk  An optional primary key value to delete.  If not set the instance property value is used.
+     *
+     * @return  boolean  True on success.
+     *
+     * @since   1.6
+     */
+    public function delete($pk = null)
+    {
+        $k  = $this->_tbl_key;
+        $pk = \is_null($pk) ? $this->$k : $pk;
+
+        if (!\is_null($pk)) {
+            $clientId = (int) $this->client_id;
+            $query    = $this->_db->getQuery(true)
+                ->select($this->_db->quoteName('id'))
+                ->from($this->_db->quoteName('#__template_styles'))
+                ->where($this->_db->quoteName('client_id') . ' = :clientid')
+                ->where($this->_db->quoteName('template') . ' = :template')
+                ->bind(':template', $this->template)
+                ->bind(':clientid', $clientId, ParameterType::INTEGER);
+            $this->_db->setQuery($query);
+            $results = $this->_db->loadColumn();
+
+            if (\count($results) == 1 && $results[0] == $pk) {
+                $this->setError(Text::_('COM_TEMPLATES_ERROR_CANNOT_DELETE_LAST_STYLE'));
+
+                return false;
+            }
+        }
+
+        return parent::delete($pk);
+    }
+}

administrator/components/com_templates/src/View/Style/HtmlView.php

@@ -0,0 +1,161 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\View\Style;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\Helper\ContentHelper;
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\MVC\View\GenericDataException;
+use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;
+use Joomla\CMS\Toolbar\Toolbar;
+use Joomla\CMS\Toolbar\ToolbarHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * View to edit a template style.
+ *
+ * @since  1.6
+ */
+class HtmlView extends BaseHtmlView
+{
+    /**
+     * The item
+     *
+     * @var   \stdClass
+     */
+    protected $item;
+
+    /**
+     * The form object
+     *
+     * @var  \Joomla\CMS\Form\Form
+     */
+    protected $form;
+
+    /**
+     * The model state
+     *
+     * @var  \Joomla\Registry\Registry
+     */
+    protected $state;
+
+    /**
+     * The actions the user is authorised to perform
+     *
+     * @var    \Joomla\Registry\Registry
+     *
+     * @since  4.0.0
+     */
+    protected $canDo;
+
+    /**
+     * Array of fieldsets not to display
+     *
+     * @var    string[]
+     *
+     * @since  5.2.0
+     */
+    public $ignore_fieldsets = [];
+
+    /**
+     * Execute and display a template script.
+     *
+     * @param   string  $tpl  The name of the template file to parse; automatically searches through the template paths.
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    public function display($tpl = null)
+    {
+        $this->item  = $this->get('Item');
+        $this->state = $this->get('State');
+        $this->form  = $this->get('Form');
+        $this->canDo = ContentHelper::getActions('com_templates');
+
+        // Check for errors.
+        if (\count($errors = $this->get('Errors'))) {
+            throw new GenericDataException(implode("\n", $errors), 500);
+        }
+
+        $this->addToolbar();
+
+        parent::display($tpl);
+    }
+
+    /**
+     * Add the page title and toolbar.
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    protected function addToolbar()
+    {
+        Factory::getApplication()->getInput()->set('hidemainmenu', true);
+
+        $isNew   = ($this->item->id == 0);
+        $canDo   = $this->canDo;
+        $toolbar = $this->getDocument()->getToolbar();
+
+        ToolbarHelper::title(
+            $isNew ? Text::_('COM_TEMPLATES_MANAGER_ADD_STYLE')
+            : Text::_('COM_TEMPLATES_MANAGER_EDIT_STYLE'),
+            'paint-brush thememanager'
+        );
+
+        // If not checked out, can save the item.
+        if ($canDo->get('core.edit')) {
+            $toolbar->apply('style.apply');
+        }
+
+        $saveGroup = $toolbar->dropdownButton('save-group');
+
+        $saveGroup->configure(
+            function (Toolbar $childBar) use ($canDo, $isNew) {
+                // If not checked out, can save the item.
+                if ($canDo->get('core.edit')) {
+                    $childBar->save('style.save');
+                }
+
+                // If an existing item, can save to a copy.
+                if (!$isNew && $canDo->get('core.create')) {
+                    $childBar->save2copy('style.save2copy');
+                }
+            }
+        );
+
+        if (empty($this->item->id)) {
+            $toolbar->cancel('style.cancel', 'JTOOLBAR_CANCEL');
+        } else {
+            $toolbar->cancel('style.cancel');
+        }
+
+        $toolbar->divider();
+
+        // Get the help information for the template item.
+        $lang = $this->getLanguage();
+        $help = $this->get('Help');
+
+        if ($lang->hasKey($help->url)) {
+            $debug = $lang->setDebug(false);
+            $url   = Text::_($help->url);
+            $lang->setDebug($debug);
+        } else {
+            $url = null;
+        }
+
+        $toolbar->help($help->key, false, $url);
+    }
+}

administrator/components/com_templates/src/View/Style/JsonView.php

@@ -0,0 +1,76 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2013 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\View\Style;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * View to edit a template style.
+ *
+ * @since  1.6
+ */
+class JsonView extends BaseHtmlView
+{
+    /**
+     * The item
+     *
+     * @var   \stdClass
+     */
+    protected $item;
+
+    /**
+     * The form object
+     *
+     * @var  \Joomla\CMS\Form\Form
+     */
+    protected $form;
+
+    /**
+     * The model state
+     *
+     * @var   \Joomla\Registry\Registry
+     */
+    protected $state;
+
+    /**
+     * Execute and display a template script.
+     *
+     * @param   string  $tpl  The name of the template file to parse; automatically searches through the template paths.
+     *
+     * @return  mixed  A string if successful, otherwise an Error object.
+     *
+     * @since   1.6
+     */
+    public function display($tpl = null)
+    {
+        try {
+            $this->item = $this->get('Item');
+        } catch (\Exception $e) {
+            $app = Factory::getApplication();
+            $app->enqueueMessage($e->getMessage(), 'error');
+
+            return false;
+        }
+
+        $paramsList = $this->item->getProperties();
+
+        unset($paramsList['xml']);
+
+        $paramsList = json_encode($paramsList);
+
+        return $paramsList;
+    }
+}

administrator/components/com_templates/src/View/Styles/HtmlView.php

@@ -0,0 +1,161 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\View\Styles;
+
+use Joomla\CMS\Component\ComponentHelper;
+use Joomla\CMS\Helper\ContentHelper;
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\MVC\View\GenericDataException;
+use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;
+use Joomla\CMS\Toolbar\ToolbarHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * View class for a list of template styles.
+ *
+ * @since  1.6
+ */
+class HtmlView extends BaseHtmlView
+{
+    /**
+     * An array of items
+     *
+     * @var  array
+     */
+    protected $items;
+
+    /**
+     * The pagination object
+     *
+     * @var  \Joomla\CMS\Pagination\Pagination
+     */
+    protected $pagination;
+
+    /**
+     * The model state
+     *
+     * @var  \Joomla\Registry\Registry
+     */
+    protected $state;
+
+    /**
+     * Form object for search filters
+     *
+     * @var    \Joomla\CMS\Form\Form
+     *
+     * @since  4.0.0
+     */
+    public $filterForm;
+
+    /**
+     * The active search filters
+     *
+     * @var    array
+     * @since  4.0.0
+     */
+    public $activeFilters;
+
+    /**
+     * Is the parameter enabled to show template positions in the frontend?
+     *
+     * @var    boolean
+     * @since  4.0.0
+     */
+    public $preview;
+
+    /**
+     * Execute and display a template script.
+     *
+     * @param   string  $tpl  The name of the template file to parse; automatically searches through the template paths.
+     *
+     * @return  void
+     */
+    public function display($tpl = null)
+    {
+        $this->items         = $this->get('Items');
+        $this->pagination    = $this->get('Pagination');
+        $this->state         = $this->get('State');
+        $this->total         = $this->get('Total');
+        $this->filterForm    = $this->get('FilterForm');
+        $this->activeFilters = $this->get('ActiveFilters');
+        $this->preview       = ComponentHelper::getParams('com_templates')->get('template_positions_display');
+
+        // Remove the menu item filter for administrator styles.
+        if ((int) $this->state->get('client_id') !== 0) {
+            unset($this->activeFilters['menuitem']);
+            $this->filterForm->removeField('menuitem', 'filter');
+        }
+
+        // Check for errors.
+        if (\count($errors = $this->get('Errors'))) {
+            throw new GenericDataException(implode("\n", $errors), 500);
+        }
+
+        $this->addToolbar();
+
+        parent::display($tpl);
+    }
+
+    /**
+     * Add the page title and toolbar.
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    protected function addToolbar()
+    {
+        $canDo    = ContentHelper::getActions('com_templates');
+        $clientId = (int) $this->get('State')->get('client_id');
+        $toolbar  = $this->getDocument()->getToolbar();
+
+        // Add a shortcut to the templates list view.
+        $toolbar->linkButton('templates', 'COM_TEMPLATES_MANAGER_TEMPLATES')
+            ->url('index.php?option=com_templates&view=templates&client_id=' . $clientId)
+            ->icon('icon-code thememanager');
+
+        // Set the title.
+        if ($clientId === 1) {
+            ToolbarHelper::title(Text::_('COM_TEMPLATES_MANAGER_STYLES_ADMIN'), 'paint-brush thememanager');
+        } else {
+            ToolbarHelper::title(Text::_('COM_TEMPLATES_MANAGER_STYLES_SITE'), 'paint-brush thememanager');
+        }
+
+        if ($canDo->get('core.edit.state')) {
+            $toolbar->makeDefault('styles.setDefault', 'COM_TEMPLATES_TOOLBAR_SET_HOME');
+            $toolbar->divider();
+        }
+
+        if ($canDo->get('core.create')) {
+            $toolbar->standardButton('duplicate', 'JTOOLBAR_DUPLICATE', 'styles.duplicate')
+                ->listCheck(true)
+                ->icon('icon-copy');
+            $toolbar->divider();
+        }
+
+        if ($canDo->get('core.delete')) {
+            $toolbar->delete('styles.delete')
+                ->message('JGLOBAL_CONFIRM_DELETE')
+                ->listCheck(true);
+            $toolbar->divider();
+        }
+
+        if ($canDo->get('core.admin') || $canDo->get('core.options')) {
+            $toolbar->preferences('com_templates');
+            $toolbar->divider();
+        }
+
+        $toolbar->help('Templates:_Styles');
+    }
+}

administrator/components/com_templates/src/View/Template/HtmlView.php

@@ -0,0 +1,418 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2008 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\View\Template;
+
+use Joomla\CMS\Component\ComponentHelper;
+use Joomla\CMS\Factory;
+use Joomla\CMS\Filter\InputFilter;
+use Joomla\CMS\Form\Form;
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;
+use Joomla\CMS\Plugin\PluginHelper;
+use Joomla\CMS\Toolbar\Button\DropdownButton;
+use Joomla\CMS\Toolbar\ToolbarHelper;
+use Joomla\CMS\Uri\Uri;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * View to edit a template.
+ *
+ * @since  1.6
+ */
+class HtmlView extends BaseHtmlView
+{
+    /**
+     * The Model state
+     *
+     * @var  \Joomla\Registry\Registry
+     */
+    protected $state;
+
+    /**
+     * The template details
+     *
+     * @var  \stdClass|false
+     */
+    protected $template;
+
+    /**
+     * For loading the source form
+     *
+     * @var  Form
+     */
+    protected $form;
+
+    /**
+     * For loading source file contents
+     *
+     * @var  array
+     */
+    protected $source;
+
+    /**
+     * Extension id
+     *
+     * @var  integer
+     */
+    protected $id;
+
+    /**
+     * Encrypted file path
+     *
+     * @var  string
+     */
+    protected $file;
+
+    /**
+     * List of available overrides
+     *
+     * @var   array
+     */
+    protected $overridesList;
+
+    /**
+     * Name of the present file
+     *
+     * @var  string
+     */
+    protected $fileName;
+
+    /**
+     * Type of the file - image, source, font
+     *
+     * @var  string
+     */
+    protected $type;
+
+    /**
+     * For loading image information
+     *
+     * @var  array
+     */
+    protected $image;
+
+    /**
+     * Template id for showing preview button
+     *
+     * @var  \stdClass
+     */
+    protected $preview;
+
+    /**
+     * For loading font information
+     *
+     * @var  array
+     */
+    protected $font;
+
+    /**
+     * A nested array containing list of files and folders
+     *
+     * @var  array
+     */
+    protected $files;
+
+    /**
+     * An array containing a list of compressed files
+     *
+     * @var  array
+     */
+    protected $archive;
+
+    /**
+     * The state of installer override plugin.
+     *
+     * @var  array
+     *
+     * @since  4.0.0
+     */
+    protected $pluginState;
+
+    /**
+     * A nested array containing list of files and folders in the media folder
+     *
+     * @var  array
+     *
+     * @since  4.1.0
+     */
+    protected $mediaFiles;
+
+    /**
+     * Execute and display a template script.
+     *
+     * @param   string  $tpl  The name of the template file to parse; automatically searches through the template paths.
+     *
+     * @return  void|boolean
+     */
+    public function display($tpl = null)
+    {
+        $app               = Factory::getApplication();
+        $this->file        = $app->getInput()->get('file', '');
+        $this->fileName    = InputFilter::getInstance()->clean(base64_decode($this->file), 'string');
+        $explodeArray      = explode('.', $this->fileName);
+        $ext               = end($explodeArray);
+        $this->files       = $this->get('Files');
+        $this->mediaFiles  = $this->get('MediaFiles');
+        $this->state       = $this->get('State');
+        $this->template    = $this->get('Template');
+        $this->preview     = $this->get('Preview');
+        $this->pluginState = PluginHelper::isEnabled('installer', 'override');
+        $this->updatedList = $this->get('UpdatedList');
+        $this->styles      = $this->get('AllTemplateStyles');
+        $this->stylesHTML  = '';
+
+        $params       = ComponentHelper::getParams('com_templates');
+        $imageTypes   = explode(',', $params->get('image_formats', 'gif,bmp,jpg,jpeg,png,webp'));
+        $sourceTypes  = explode(',', $params->get('source_formats', 'txt,less,ini,xml,js,php,css,scss,sass,json'));
+        $fontTypes    = explode(',', $params->get('font_formats', 'woff,woff2,ttf,otf'));
+        $archiveTypes = explode(',', $params->get('compressed_formats', 'zip'));
+
+        if (\in_array($ext, $sourceTypes)) {
+            $this->form   = $this->get('Form');
+            $this->form->setFieldAttribute('source', 'syntax', $ext);
+            $this->source = $this->get('Source');
+            $this->type   = 'file';
+        } elseif (\in_array($ext, $imageTypes)) {
+            try {
+                $this->image = $this->get('Image');
+                $this->type  = 'image';
+            } catch (\RuntimeException $exception) {
+                $app->enqueueMessage(Text::_('COM_TEMPLATES_GD_EXTENSION_NOT_AVAILABLE'));
+                $this->type = 'home';
+            }
+        } elseif (\in_array($ext, $fontTypes)) {
+            $this->font = $this->get('Font');
+            $this->type = 'font';
+        } elseif (\in_array($ext, $archiveTypes)) {
+            $this->archive = $this->get('Archive');
+            $this->type    = 'archive';
+        } else {
+            $this->type = 'home';
+        }
+
+        $this->overridesList = $this->get('OverridesList');
+        $this->id            = $this->state->get('extension.id');
+
+        // Check for errors.
+        if (\count($errors = $this->get('Errors'))) {
+            $app->enqueueMessage(implode("\n", $errors));
+
+            return false;
+        }
+
+        $this->addToolbar();
+
+        if (!$this->getCurrentUser()->authorise('core.admin')) {
+            $this->setLayout('readonly');
+        }
+
+        parent::display($tpl);
+    }
+
+    /**
+     * Add the page title and toolbar.
+     *
+     * @since   1.6
+     *
+     * @return  void
+     */
+    protected function addToolbar()
+    {
+        $app     = Factory::getApplication();
+        $user    = $this->getCurrentUser();
+        $toolbar = $this->getDocument()->getToolbar();
+        $app->getInput()->set('hidemainmenu', true);
+
+        // User is global SuperUser
+        $isSuperUser  = $user->authorise('core.admin');
+
+        ToolbarHelper::title(Text::sprintf('COM_TEMPLATES_MANAGER_VIEW_TEMPLATE', ucfirst($this->template->name)), 'icon-code thememanager');
+
+        // Add a Template preview button
+        if ($this->type === 'home') {
+            $client = (int) $this->preview->client_id === 1 ? 'administrator/' : '';
+            $toolbar->linkButton('preview', 'COM_TEMPLATES_BUTTON_PREVIEW')
+                ->url(Uri::root() . $client . 'index.php?tp=1&templateStyle=' . $this->preview->id)
+                ->icon('icon-image')
+                ->attributes(['target' => '_new']);
+        }
+
+        // Only show file edit buttons for global SuperUser
+        if ($isSuperUser) {
+            switch ($this->type) {
+                case 'file':
+                    $toolbar->apply('template.apply');
+                    $toolbar->save('template.save');
+                    $toolbar->cancel('template.close', 'COM_TEMPLATES_BUTTON_CLOSE_FILE');
+                    break;
+
+                case 'image':
+                    // Add a Crop and Resize button
+                    $toolbar->standardButton('crop', 'COM_TEMPLATES_BUTTON_CROP', 'template.cropImage')
+                        ->listCheck(false)
+                        ->icon('icon-crop');
+                    ToolbarHelper::modal('resizeModal', 'icon-expand', 'COM_TEMPLATES_BUTTON_RESIZE');
+                    $toolbar->cancel('template.close', 'COM_TEMPLATES_BUTTON_CLOSE_FILE');
+                    break;
+
+                case 'archive':
+                    // Add an extract button
+                    $toolbar->standardButton('extract', 'COM_TEMPLATES_BUTTON_EXTRACT_ARCHIVE', 'template.extractArchive')
+                        ->listCheck(false)
+                        ->icon('icon-chevron-down');
+                    break;
+
+                case 'home':
+                    // Add a copy/child template button
+                    if (isset($this->template->xmldata->inheritable) && (string) $this->template->xmldata->inheritable === '1') {
+                        ToolbarHelper::modal('childModal', 'icon-copy', 'COM_TEMPLATES_BUTTON_TEMPLATE_CHILD');
+                    } elseif (empty($this->template->xmldata->parent) && empty($this->template->xmldata->namespace)) {
+                        // We can't copy parent templates nor namespaced templates
+                        ToolbarHelper::modal('copyModal', 'icon-copy', 'COM_TEMPLATES_BUTTON_COPY_TEMPLATE');
+                    }
+
+                    break;
+            }
+        }
+
+        // Only show file manage buttons for global SuperUser
+        if ($isSuperUser) {
+            if ($this->type === 'home') {
+                // Add Manage folders button
+                ToolbarHelper::modal('folderModal', 'icon-folder icon white', 'COM_TEMPLATES_BUTTON_FOLDERS');
+
+                // Add a new file button
+                ToolbarHelper::modal('fileModal', 'icon-file', 'COM_TEMPLATES_BUTTON_FILE');
+            } else {
+                // Add a Rename file Button
+                ToolbarHelper::modal('renameModal', 'icon-sync', 'COM_TEMPLATES_BUTTON_RENAME_FILE');
+
+                // Add a Delete file Button
+                ToolbarHelper::modal('deleteModal', 'icon-trash', 'COM_TEMPLATES_BUTTON_DELETE_FILE', 'btn-danger');
+            }
+        }
+
+        if (\count($this->updatedList) !== 0 && $this->pluginState && $this->type === 'home') {
+            /** @var DropdownButton $dropdown */
+            $dropdown = $toolbar->dropdownButton('override-group', 'COM_TEMPLATES_BUTTON_CHECK')
+                ->toggleSplit(false)
+                ->icon('icon-ellipsis-h')
+                ->buttonClass('btn btn-action')
+                ->form('updateForm')
+                ->listCheck(true);
+
+            $childBar = $dropdown->getChildToolbar();
+
+            $childBar->publish('template.publish')
+                ->text('COM_TEMPLATES_BUTTON_CHECK_LIST_ENTRY')
+                ->form('updateForm')
+                ->listCheck(true);
+            $childBar->unpublish('template.unpublish')
+                ->text('COM_TEMPLATES_BUTTON_UNCHECK_LIST_ENTRY')
+                ->form('updateForm')
+                ->listCheck(true);
+            $childBar->unpublish('template.deleteOverrideHistory')
+                ->text('COM_TEMPLATES_BUTTON_DELETE_LIST_ENTRY')
+                ->form('updateForm')
+                ->listCheck(true);
+        }
+
+        if (!\in_array($this->type, ['image', 'file'])) {
+            $toolbar->cancel('template.cancel');
+        }
+
+        $toolbar->divider();
+        $toolbar->help('Templates:_Customise');
+    }
+
+    /**
+     * Method for creating the collapsible tree.
+     *
+     * @param   array  $array  The value of the present node for recursion
+     *
+     * @return  string
+     *
+     * @note    Uses recursion
+     * @since   3.2
+     */
+    protected function directoryTree($array)
+    {
+        $temp        = $this->files;
+        $this->files = $array;
+        $txt         = $this->loadTemplate('tree');
+        $this->files = $temp;
+
+        return $txt;
+    }
+
+    /**
+     * Method for listing the folder tree in modals.
+     *
+     * @param   array  $array  The value of the present node for recursion
+     *
+     * @return  string
+     *
+     * @note    Uses recursion
+     * @since   3.2
+     */
+    protected function folderTree($array)
+    {
+        $temp        = $this->files;
+        $this->files = $array;
+        $txt         = $this->loadTemplate('folders');
+        $this->files = $temp;
+
+        return $txt;
+    }
+
+    /**
+     * Method for creating the collapsible tree.
+     *
+     * @param   array  $array  The value of the present node for recursion
+     *
+     * @return  string
+     *
+     * @note    Uses recursion
+     * @since   4.1.0
+     */
+    protected function mediaTree($array)
+    {
+        $temp             = $this->mediaFiles;
+        $this->mediaFiles = $array;
+        $txt              = $this->loadTemplate('tree_media');
+        $this->mediaFiles = $temp;
+
+        return $txt;
+    }
+
+    /**
+     * Method for listing the folder tree in modals.
+     *
+     * @param   array  $array  The value of the present node for recursion
+     *
+     * @return  string
+     *
+     * @note    Uses recursion
+     * @since   4.1.0
+     */
+    protected function mediaFolderTree($array)
+    {
+        $temp             = $this->mediaFiles;
+        $this->mediaFiles = $array;
+        $txt              = $this->loadTemplate('media_folders');
+        $this->mediaFiles = $temp;
+
+        return $txt;
+    }
+}

administrator/components/com_templates/src/View/Templates/HtmlView.php

@@ -0,0 +1,159 @@
+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_templates
+ *
+ * @copyright   (C) 2008 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Templates\Administrator\View\Templates;
+
+use Joomla\CMS\Component\ComponentHelper;
+use Joomla\CMS\Helper\ContentHelper;
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\MVC\View\GenericDataException;
+use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;
+use Joomla\CMS\Plugin\PluginHelper;
+use Joomla\CMS\Toolbar\ToolbarHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * View class for a list of templates.
+ *
+ * @since  1.6
+ */
+class HtmlView extends BaseHtmlView
+{
+    /**
+     * The list of templates
+     *
+     * @var     array
+     * @since   1.6
+     */
+    protected $items;
+
+    /**
+     * The pagination object
+     *
+     * @var     object
+     * @since   1.6
+     */
+    protected $pagination;
+
+    /**
+     * The model state
+     *
+     * @var     object
+     * @since   1.6
+     */
+    protected $state;
+
+    /**
+     * @var     string
+     * @since   3.2
+     */
+    protected $file;
+
+    /**
+     * Form object for search filters
+     *
+     * @var    \Joomla\CMS\Form\Form
+     *
+     * @since  4.0.0
+     */
+    public $filterForm;
+
+    /**
+     * The active search filters
+     *
+     * @var    array
+     * @since  4.0.0
+     */
+    public $activeFilters;
+
+    /**
+     * Is the parameter enabled to show template positions in the frontend?
+     *
+     * @var    boolean
+     * @since  4.0.0
+     */
+    public $preview;
+
+    /**
+     * The state of installer override plugin.
+     *
+     * @var  array
+     *
+     * @since  4.0.0
+     */
+    protected $pluginState;
+
+    /**
+     * Execute and display a template script.
+     *
+     * @param   string  $tpl  The name of the template file to parse; automatically searches through the template paths.
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    public function display($tpl = null)
+    {
+        $this->items         = $this->get('Items');
+        $this->pagination    = $this->get('Pagination');
+        $this->state         = $this->get('State');
+        $this->total         = $this->get('Total');
+        $this->filterForm    = $this->get('FilterForm');
+        $this->activeFilters = $this->get('ActiveFilters');
+        $this->preview       = ComponentHelper::getParams('com_templates')->get('template_positions_display');
+        $this->file          = base64_encode('home');
+        $this->pluginState   = PluginHelper::isEnabled('installer', 'override');
+
+        // Check for errors.
+        if (\count($errors = $this->get('Errors'))) {
+            throw new GenericDataException(implode("\n", $errors), 500);
+        }
+
+        $this->addToolbar();
+
+        parent::display($tpl);
+    }
+
+    /**
+     * Add the page title and toolbar.
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    protected function addToolbar()
+    {
+        $canDo    = ContentHelper::getActions('com_templates');
+        $clientId = (int) $this->get('State')->get('client_id');
+        $toolbar  = $this->getDocument()->getToolbar();
+
+        // Add a shortcut to the styles list view.
+        $toolbar->linkButton('', 'COM_TEMPLATES_MANAGER_STYLES_BUTTON')
+            ->url('index.php?option=com_templates&view=styles&client_id=' . $clientId)
+            ->icon('icon-brush thememanager');
+
+        // Set the title.
+        if ($clientId === 1) {
+            ToolbarHelper::title(Text::_('COM_TEMPLATES_MANAGER_TEMPLATES_ADMIN'), 'icon-code thememanager');
+        } else {
+            ToolbarHelper::title(Text::_('COM_TEMPLATES_MANAGER_TEMPLATES_SITE'), 'icon-code thememanager');
+        }
+
+        if ($canDo->get('core.admin') || $canDo->get('core.options')) {
+            $toolbar->preferences('com_templates');
+            $toolbar->divider();
+        }
+
+        $toolbar->help('Templates:_Templates');
+    }
+}