first commit

plugins/extension/finder/finder.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<extension type="plugin" group="extension" method="upgrade">
+	<name>plg_extension_finder</name>
+	<author>Joomla! Project</author>
+	<creationDate>2018-06</creationDate>
+	<copyright>(C) 2019 Open Source Matters, Inc.</copyright>
+	<license>GNU General Public License version 2 or later; see LICENSE.txt</license>
+	<authorEmail>admin@joomla.org</authorEmail>
+	<authorUrl>www.joomla.org</authorUrl>
+	<version>4.0.0</version>
+	<description>PLG_EXTENSION_FINDER_XML_DESCRIPTION</description>
+	<namespace path="src">Joomla\Plugin\Extension\Finder</namespace>
+	<files>
+		<folder plugin="finder">services</folder>
+		<folder>src</folder>
+	</files>
+	<languages>
+		<language tag="en-GB">language/en-GB/plg_extension_finder.ini</language>
+		<language tag="en-GB">language/en-GB/plg_extension_finder.sys.ini</language>
+	</languages>
+</extension>

plugins/extension/finder/services/provider.php

@@ -0,0 +1,47 @@
+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Extension.finder
+ *
+ * @copyright   (C) 2022 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Extension\PluginInterface;
+use Joomla\CMS\Plugin\PluginHelper;
+use Joomla\Database\DatabaseInterface;
+use Joomla\DI\Container;
+use Joomla\DI\ServiceProviderInterface;
+use Joomla\Event\DispatcherInterface;
+use Joomla\Plugin\Extension\Finder\Extension\Finder;
+
+return new class () implements ServiceProviderInterface {
+    /**
+     * Registers the service provider with a DI container.
+     *
+     * @param   Container  $container  The DI container.
+     *
+     * @return  void
+     *
+     * @since   4.3.0
+     */
+    public function register(Container $container)
+    {
+        $container->set(
+            PluginInterface::class,
+            function (Container $container) {
+                $dispatcher = $container->get(DispatcherInterface::class);
+                $plugin     = new Finder(
+                    $dispatcher,
+                    (array) PluginHelper::getPlugin('extension', 'finder')
+                );
+                $plugin->setDatabase($container->get(DatabaseInterface::class));
+
+                return $plugin;
+            }
+        );
+    }
+};

plugins/extension/finder/src/Extension/Finder.php

@@ -0,0 +1,190 @@
+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Extension.Finder
+ *
+ * @copyright   (C) 2019 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Plugin\Extension\Finder\Extension;
+
+use Joomla\CMS\Installer\Installer;
+use Joomla\CMS\Plugin\CMSPlugin;
+use Joomla\Component\Finder\Administrator\Indexer\Helper;
+use Joomla\Database\DatabaseAwareTrait;
+use Joomla\Database\ParameterType;
+use Joomla\String\StringHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Finder extension plugin
+ *
+ * @since  4.0.0
+ */
+final class Finder extends CMSPlugin
+{
+    use DatabaseAwareTrait;
+
+    /**
+     * Add common words to finder after language got installed
+     *
+     * @param   Installer   $installer  Installer object
+     * @param   integer     $eid        Extension Identifier
+     *
+     * @return  void
+     *
+     * @since   4.0.0
+     */
+    public function onExtensionAfterInstall($installer, $eid)
+    {
+        if (!$eid) {
+            return;
+        }
+
+        $db    = $this->getDatabase();
+        $query = $db->getQuery(true)
+            ->select($db->quoteName(['element', 'client_id']))
+            ->from($db->quoteName('#__extensions'))
+            ->where(
+                [
+                    $db->quoteName('extension_id') . ' = :eid',
+                    $db->quoteName('type') . ' = ' . $db->quote('language'),
+                ]
+            )
+            ->bind(':eid', $eid, ParameterType::INTEGER);
+
+        $extension = $db->setQuery($query)->loadObject();
+
+        if ($extension) {
+            $this->addCommonWords($extension);
+        }
+    }
+
+    /**
+     * Add common words to finder after language got updated
+     *
+     * @param   Installer  $installer  Installer object
+     * @param   integer    $eid        Extension identifier
+     *
+     * @return  void
+     *
+     * @since   4.0.0
+     */
+    public function onExtensionAfterUpdate($installer, $eid)
+    {
+        $this->onExtensionAfterInstall($installer, $eid);
+    }
+
+    /**
+     * Remove common words to finder after language got uninstalled
+     *
+     * @param   Installer  $installer  Installer instance
+     * @param   integer    $eid        Extension id
+     * @param   boolean    $removed    Installation result
+     *
+     * @return  void
+     *
+     * @since   4.0.0
+     */
+    public function onExtensionAfterUninstall($installer, $eid, $removed)
+    {
+        // Check that the language was successfully uninstalled.
+        if ($eid && $removed && $installer->extension->type === 'language') {
+            $this->removeCommonWords($installer->extension);
+        }
+    }
+
+    /**
+     * Add common words from a txt file to com_finder
+     *
+     * @param   object  $extension  Extension object
+     *
+     * @return  void
+     *
+     * @since   4.0.0
+     */
+    protected function addCommonWords($extension)
+    {
+        if ($extension->client_id == 0) {
+            $path = JPATH_SITE . '/language/' . $extension->element . '/com_finder.commonwords.txt';
+        } else {
+            $path = JPATH_ADMINISTRATOR . '/language/' . $extension->element . '/com_finder.commonwords.txt';
+        }
+
+        if (!file_exists($path)) {
+            return;
+        }
+
+        $this->removeCommonWords($extension);
+
+        $file_content = file_get_contents($path);
+        $words        = explode("\n", $file_content);
+        $words        = array_map(
+            function ($word) {
+                // Remove comments
+                if (StringHelper::strpos($word, ';') !== false) {
+                    $word = StringHelper::substr($word, 0, StringHelper::strpos($word, ';'));
+                }
+
+                return $word;
+            },
+            $words
+        );
+
+        $words = array_filter(array_map('trim', $words));
+        $words = array_unique($words);
+        $db    = $this->getDatabase();
+        $query = $db->getQuery(true);
+
+        $lang = Helper::getPrimaryLanguage($extension->element);
+
+        $query->insert($db->quoteName('#__finder_terms_common'))
+            ->columns($db->quoteName(['term', 'language', 'custom']));
+
+        foreach ($words as $word) {
+            $bindNames = $query->bindArray([$word, $lang], ParameterType::STRING);
+
+            $query->values(implode(',', $bindNames) . ', 0');
+        }
+
+        try {
+            $db->setQuery($query);
+            $db->execute();
+        } catch (\Exception $ex) {
+            // It would be nice if the common word is stored to the DB, but it isn't super important
+        }
+    }
+
+    /**
+     * Remove common words of a language from com_finder
+     *
+     * @param   object  $extension  Extension object
+     *
+     * @return  void
+     *
+     * @since   4.0.0
+     */
+    protected function removeCommonWords($extension)
+    {
+        $db   = $this->getDatabase();
+        $lang = Helper::getPrimaryLanguage($extension->element);
+
+        $query = $db->getQuery(true);
+        $query->delete($db->quoteName('#__finder_terms_common'))
+            ->where(
+                [
+                    $db->quoteName('language') . ' = :lang',
+                    $db->quoteName('custom') . ' = 0',
+                ]
+            )
+            ->bind(':lang', $lang);
+
+        $db->setQuery($query);
+        $db->execute();
+    }
+}

plugins/extension/jce/jce.php

@@ -0,0 +1,218 @@
+<?php
+/**
+ * @copyright   Copyright (C) 2005 - 2016 Open Source Matters, Inc. All rights reserved
+ * @copyright   Copyright (C) 2018 Ryan Demmer. All rights reserved
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+defined('_JEXEC') or die;
+
+/**
+ * JCE extension plugin.
+ *
+ * @since  2.6
+ */
+class PlgExtensionJce extends JPlugin
+{
+    /**
+     * Check the installer is for a valid plugin group.
+     *
+     * @param JInstaller $installer Installer object
+     *
+     * @return bool
+     *
+     * @since   2.6
+     */
+    private function isValidPlugin($installer)
+    {
+        if (empty($installer->manifest)) {
+            return false;
+        }
+
+        foreach (array('type', 'group') as $var) {
+            $$var = (string) $installer->manifest->attributes()->{$var};
+        }
+
+        return $type === 'plugin' && $group === 'jce';
+    }
+
+    public function onExtensionBeforeInstall($method, $type, $manifest, $extension = 0)
+    {
+        if ((string) $type === "file") {
+
+            // get a reference to the current installer
+            $manifestPath = JInstaller::getInstance()->getPath('manifest');
+
+            if (empty($manifestPath)) {
+                return true;
+            }
+
+            // get the filename of the manifest file, eg: pkg_jce_de-DE
+            $element = basename($manifestPath, '.xml');
+
+            // if this matches the current install...
+            if (strpos($element, 'pkg_jce_') !== false) {
+                // find an existing legacy language install, eg: jce-de-DE
+                $element = str_replace('pkg_jce_', 'jce-', $element);
+
+                $table = JTable::getInstance('extension');
+                $id = $table->find(array('type' => 'file', 'element' => $element));
+
+                if ($id) {
+                    $installer = new JInstaller();
+
+                    // try unisntall, if this fails, delete database entry
+                    if (!$installer->uninstall('file', $id)) {
+                        $table->delete($id);
+                    }
+                }
+            }
+        }
+    }
+    /**
+     * Handle post extension install update sites.
+     *
+     * @param JInstaller $installer Installer object
+     * @param int        $eid       Extension Identifier
+     *
+     * @since   2.6
+     */
+    public function onExtensionAfterInstall($installer, $eid)
+    {
+        if ($eid) {
+            if (!$this->isValidPlugin($installer)) {
+                return false;
+            }
+
+            $basename = basename($installer->getPath('extension_root'));
+
+            if (strpos($basename, '-') === false) {
+                return false;
+            }
+
+            require_once JPATH_ADMINISTRATOR . '/components/com_jce/helpers/plugins.php';
+
+            // enable plugin
+            $plugin = JTable::getInstance('extension');
+            $plugin->load($eid);
+            $plugin->publish();
+
+            $parts = explode('-', $basename);
+            $type = $parts[0];
+            $name = $parts[1];
+
+            $plugin = new StdClass();
+            $plugin->name = $name;
+
+            if ($type === 'editor') {
+                $plugin->icon = (string) $installer->manifest->icon;
+                $plugin->row = (int) (string) $installer->manifest->attributes()->row;
+                $plugin->type = 'plugin';
+            } else {
+                $plugin->type = 'extension';
+            }
+
+            $plugin->path = $installer->getPath('extension_root');
+
+            JcePluginsHelper::postInstall('install', $plugin, $installer);
+
+            // clean up legacy extensions
+            if ($plugin->type == 'extension') {
+                jimport('joomla.filesystem.folder');
+                jimport('joomla.filesystem.file');
+
+                $path = JPATH_SITE . '/components/com_jce/editor/extensions/' . $type;
+
+                // delete manifest
+                if (is_file($path . '/' . $plugin->name . '.xml')) {
+                    JFile::delete($path . '/' . $plugin->name . '.xml');
+                }
+                // delete file
+                if (is_file($path . '/' . $plugin->name . '.php')) {
+                    JFile::delete($path . '/' . $plugin->name . '.php');
+                }
+                // delete folder
+                if (is_dir($path . '/' . $plugin->name)) {
+                    JFolder::delete($path . '/' . $plugin->name);
+                }
+            }
+        }
+    }
+
+    /**
+     * Handle extension uninstall.
+     *
+     * @param JInstaller $installer Installer instance
+     * @param int        $eid       Extension id
+     * @param int        $result    Installation result
+     *
+     * @since   1.6
+     */
+    public function onExtensionAfterUninstall($installer, $eid, $result)
+    {
+        if ($eid) {
+            if (!$this->isValidPlugin($installer)) {
+                return false;
+            }
+
+            $basename = basename($installer->getPath('extension_root'));
+
+            if (strpos($basename, '-') === false) {
+                return false;
+            }
+
+            require_once JPATH_ADMINISTRATOR . '/components/com_jce/helpers/plugins.php';
+
+            $parts = explode('-', $basename);
+            $type = $parts[0];
+            $name = $parts[1];
+
+            $plugin = new StdClass();
+            $plugin->name = $name;
+
+            if ($type === 'editor') {
+                $plugin->icon = (string) $installer->manifest->icon;
+                $plugin->row = (int) (string) $installer->manifest->attributes()->row;
+                $plugin->type = 'plugin';
+            }
+
+            $plugin->path = $installer->getPath('extension_root');
+
+            JcePluginsHelper::postInstall('uninstall', $plugin, $installer);
+        }
+    }
+
+    public function onExtensionAfterSave($context, $table, $result)
+    {
+        if ($context !== 'com_config.component') {
+            return;
+        }
+
+        if ($table->element !== 'com_jce') {
+            return;
+        }
+
+        $params = json_decode($table->params, true);
+
+        if ($params && !empty($params['updates_key'])) {
+            $updatesite = JTable::getInstance('Updatesite');
+
+            // sanitize key
+            $key = preg_replace("/[^a-zA-Z0-9]/", "", $params['updates_key']);
+
+            $db = JFactory::getDBO();
+
+            $query = $db->getQuery(true);
+            $query->select($db->qn('update_site_id'))->from('#__update_sites_extensions')->where($db->qn('extension_id') . '=' . (int) $table->package_id);
+            $db->setQuery($query);
+            $update_site_id = $db->loadResult();
+
+            if ($update_site_id) {
+                if ($updatesite->load($update_site_id)) {
+                    $updatesite->bind(array('extra_query' => 'key=' . $key));
+                    $updatesite->check();
+                    $updatesite->store();
+                }
+            }
+        }
+    }
+}

plugins/extension/jce/jce.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<extension version="3.8" type="plugin" group="extension" method="upgrade">
+	<name>plg_extension_jce</name>
+	<version>2.9.32</version>
+  <creationDate>01-11-2022</creationDate>
+  <author>Ryan Demmer</author>
+  <authorEmail>info@joomlacontenteditor.net</authorEmail>
+  <authorUrl>http://www.joomlacontenteditor.net</authorUrl>
+  <copyright>Copyright (C) 2006 - 2022 Ryan Demmer. All rights reserved</copyright>
+  <license>GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html</license>
+	<description>PLG_EXTENSION_JCE_XML_DESCRIPTION</description>
+	<files folder="plugins/extension/jce">
+		<filename plugin="jce">jce.php</filename>
+	</files>
+	<languages folder="administrator/language/en-GB">
+      <language tag="en-GB">en-GB.plg_extension_jce.ini</language>
+      <language tag="en-GB">en-GB.plg_extension_jce.sys.ini</language>
+  </languages>
+</extension>

plugins/extension/joomla/joomla.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<extension type="plugin" group="extension" method="upgrade">
+	<name>plg_extension_joomla</name>
+	<author>Joomla! Project</author>
+	<creationDate>2010-05</creationDate>
+	<copyright>(C) 2010 Open Source Matters, Inc.</copyright>
+	<license>GNU General Public License version 2 or later; see LICENSE.txt</license>
+	<authorEmail>admin@joomla.org</authorEmail>
+	<authorUrl>www.joomla.org</authorUrl>
+	<version>3.0.0</version>
+	<description>PLG_EXTENSION_JOOMLA_XML_DESCRIPTION</description>
+	<namespace path="src">Joomla\Plugin\Extension\Joomla</namespace>
+	<files>
+		<folder plugin="joomla">services</folder>
+		<folder>src</folder>
+	</files>
+	<languages>
+		<language tag="en-GB">language/en-GB/plg_extension_joomla.ini</language>
+		<language tag="en-GB">language/en-GB/plg_extension_joomla.sys.ini</language>
+	</languages>
+</extension>

plugins/extension/joomla/services/provider.php

@@ -0,0 +1,47 @@
+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Extension.joomla
+ *
+ * @copyright   (C) 2022 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Extension\PluginInterface;
+use Joomla\CMS\Plugin\PluginHelper;
+use Joomla\Database\DatabaseInterface;
+use Joomla\DI\Container;
+use Joomla\DI\ServiceProviderInterface;
+use Joomla\Event\DispatcherInterface;
+use Joomla\Plugin\Extension\Joomla\Extension\Joomla;
+
+return new class () implements ServiceProviderInterface {
+    /**
+     * Registers the service provider with a DI container.
+     *
+     * @param   Container  $container  The DI container.
+     *
+     * @return  void
+     *
+     * @since   4.3.0
+     */
+    public function register(Container $container)
+    {
+        $container->set(
+            PluginInterface::class,
+            function (Container $container) {
+                $dispatcher = $container->get(DispatcherInterface::class);
+                $plugin     = new Joomla(
+                    $dispatcher,
+                    (array) PluginHelper::getPlugin('extension', 'joomla')
+                );
+                $plugin->setDatabase($container->get(DatabaseInterface::class));
+
+                return $plugin;
+            }
+        );
+    }
+};

plugins/extension/joomla/src/Extension/Joomla.php

@@ -0,0 +1,293 @@
+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Extension.joomla
+ *
+ * @copyright   (C) 2010 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Plugin\Extension\Joomla\Extension;
+
+use Joomla\CMS\Installer\Installer;
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\Plugin\CMSPlugin;
+use Joomla\Database\DatabaseAwareTrait;
+use Joomla\Database\ParameterType;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Joomla! main extension plugin.
+ *
+ * @since  1.6
+ */
+final class Joomla extends CMSPlugin
+{
+    use DatabaseAwareTrait;
+
+    /**
+     * @var    integer
+     *
+     * @since  1.6
+     */
+    private $eid = 0;
+
+    /**
+     * @var    Installer
+     *
+     * @since  1.6
+     */
+    private $installer = null;
+
+    /**
+     * Load the language file on instantiation.
+     *
+     * @var    boolean
+     *
+     * @since  3.1
+     */
+    protected $autoloadLanguage = true;
+
+    /**
+     * Adds an update site to the table if it doesn't exist.
+     *
+     * @param   string   $name        The friendly name of the site
+     * @param   string   $type        The type of site (e.g. collection or extension)
+     * @param   string   $location    The URI for the site
+     * @param   boolean  $enabled     If this site is enabled
+     * @param   string   $extraQuery  Any additional request query to use when updating
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    private function addUpdateSite($name, $type, $location, $enabled, $extraQuery = '')
+    {
+        // Look if the location is used already; doesn't matter what type you can't have two types at the same address, doesn't make sense
+        $db    = $this->getDatabase();
+        $query = $db->getQuery(true);
+
+        $query->select($db->quoteName('update_site_id'))
+            ->from($db->quoteName('#__update_sites'))
+            ->where($db->quoteName('location') . ' = :location')
+            ->bind(':location', $location);
+
+        $db->setQuery($query);
+
+        $update_site_id = (int) $db->loadResult();
+
+        // If it doesn't exist, add it!
+        if (!$update_site_id) {
+            $enabled = (int) $enabled;
+            $query->clear()
+                ->insert($db->quoteName('#__update_sites'))
+                ->columns($db->quoteName(['name', 'type', 'location', 'enabled', 'extra_query']))
+                ->values(':name, :type, :location, :enabled, :extra_query')
+                ->bind(':name', $name)
+                ->bind(':type', $type)
+                ->bind(':location', $location)
+                ->bind(':enabled', $enabled, ParameterType::INTEGER)
+                ->bind(':extra_query', $extraQuery);
+
+            $db->setQuery($query);
+
+            if ($db->execute()) {
+                // Link up this extension to the update site
+                $update_site_id = $db->insertid();
+            }
+        }
+
+        // Check if it has an update site id (creation might have failed)
+        if ($update_site_id) {
+            // Look for an update site entry that exists
+            $query->clear()
+                ->select($db->quoteName('update_site_id'))
+                ->from($db->quoteName('#__update_sites_extensions'))
+                ->where(
+                    [
+                        $db->quoteName('update_site_id') . ' = :updatesiteid',
+                        $db->quoteName('extension_id') . ' = :extensionid',
+                    ]
+                )
+                ->bind(':updatesiteid', $update_site_id, ParameterType::INTEGER)
+                ->bind(':extensionid', $this->eid, ParameterType::INTEGER);
+
+            $db->setQuery($query);
+
+            $tmpid = (int) $db->loadResult();
+
+            if (!$tmpid) {
+                // Link this extension to the relevant update site
+                $query->clear()
+                    ->insert($db->quoteName('#__update_sites_extensions'))
+                    ->columns($db->quoteName(['update_site_id', 'extension_id']))
+                    ->values(':updatesiteid, :eid')
+                    ->bind(':updatesiteid', $update_site_id, ParameterType::INTEGER)
+                    ->bind(':eid', $this->eid, ParameterType::INTEGER);
+
+                $db->setQuery($query);
+                $db->execute();
+            }
+        }
+    }
+
+    /**
+     * Handle post extension install update sites
+     *
+     * @param   Installer  $installer  Installer object
+     * @param   integer    $eid        Extension Identifier
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    public function onExtensionAfterInstall($installer, $eid)
+    {
+        if ($eid) {
+            $this->installer = $installer;
+            $this->eid       = (int) $eid;
+
+            // After an install we only need to do update sites
+            $this->processUpdateSites();
+        }
+    }
+
+    /**
+     * Handle extension uninstall
+     *
+     * @param   Installer  $installer  Installer instance
+     * @param   integer    $eid        Extension id
+     * @param   boolean    $removed    Installation result
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    public function onExtensionAfterUninstall($installer, $eid, $removed)
+    {
+        // If we have a valid extension ID and the extension was successfully uninstalled wipe out any
+        // update sites for it
+        if ($eid && $removed) {
+            $db    = $this->getDatabase();
+            $query = $db->getQuery(true);
+            $eid   = (int) $eid;
+
+            $query->delete($db->quoteName('#__update_sites_extensions'))
+                ->where($db->quoteName('extension_id') . ' = :eid')
+                ->bind(':eid', $eid, ParameterType::INTEGER);
+
+            $db->setQuery($query);
+            $db->execute();
+
+            // Delete any unused update sites
+            $query->clear()
+                ->select($db->quoteName('update_site_id'))
+                ->from($db->quoteName('#__update_sites_extensions'));
+
+            $db->setQuery($query);
+            $results = $db->loadColumn();
+
+            if (is_array($results)) {
+                // So we need to delete the update sites and their associated updates
+                $updatesite_delete = $db->getQuery(true);
+                $updatesite_delete->delete($db->quoteName('#__update_sites'));
+
+                $updatesite_query = $db->getQuery(true);
+                $updatesite_query->select($db->quoteName('update_site_id'))
+                    ->from($db->quoteName('#__update_sites'));
+
+                // If we get results back then we can exclude them
+                if (count($results)) {
+                    $updatesite_query->whereNotIn($db->quoteName('update_site_id'), $results);
+                    $updatesite_delete->whereNotIn($db->quoteName('update_site_id'), $results);
+                }
+
+                // So let's find what update sites we're about to nuke and remove their associated extensions
+                $db->setQuery($updatesite_query);
+                $update_sites_pending_delete = $db->loadColumn();
+
+                if (is_array($update_sites_pending_delete) && count($update_sites_pending_delete)) {
+                    // Nuke any pending updates with this site before we delete it
+                    // @todo: investigate alternative of using a query after the delete below with a query and not in like above
+                    $query->clear()
+                        ->delete($db->quoteName('#__updates'))
+                        ->whereIn($db->quoteName('update_site_id'), $update_sites_pending_delete);
+
+                    $db->setQuery($query);
+                    $db->execute();
+                }
+
+                // Note: this might wipe out the entire table if there are no extensions linked
+                $db->setQuery($updatesite_delete);
+                $db->execute();
+            }
+
+            // Last but not least we wipe out any pending updates for the extension
+            $query->clear()
+                ->delete($db->quoteName('#__updates'))
+                ->where($db->quoteName('extension_id') . ' = :eid')
+                ->bind(':eid', $eid, ParameterType::INTEGER);
+
+            $db->setQuery($query);
+            $db->execute();
+        }
+    }
+
+    /**
+     * After update of an extension
+     *
+     * @param   Installer  $installer  Installer object
+     * @param   integer    $eid        Extension identifier
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    public function onExtensionAfterUpdate($installer, $eid)
+    {
+        if ($eid) {
+            $this->installer = $installer;
+            $this->eid       = (int) $eid;
+
+            // Handle any update sites
+            $this->processUpdateSites();
+        }
+    }
+
+    /**
+     * Processes the list of update sites for an extension.
+     *
+     * @return  void
+     *
+     * @since   1.6
+     */
+    private function processUpdateSites()
+    {
+        $manifest      = $this->installer->getManifest();
+        $updateservers = $manifest->updateservers;
+
+        if ($updateservers) {
+            $children = $updateservers->children();
+        } else {
+            $children = [];
+        }
+
+        if (count($children)) {
+            foreach ($children as $child) {
+                $attrs = $child->attributes();
+                $this->addUpdateSite((string) $attrs['name'], (string) $attrs['type'], trim($child), true, $this->installer->extraQuery);
+            }
+        } else {
+            $data = trim((string) $updateservers);
+
+            if ($data !== '') {
+                // We have a single entry in the update server line, let us presume this is an extension line
+                $this->addUpdateSite(Text::_('PLG_EXTENSION_JOOMLA_UNKNOWN_SITE'), 'extension', $data, true);
+            }
+        }
+    }
+}

plugins/extension/namespacemap/namespacemap.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<extension type="plugin" group="extension" method="upgrade">
+	<name>plg_extension_namespacemap</name>
+	<author>Joomla! Project</author>
+	<creationDate>2017-05</creationDate>
+	<copyright>(C) 2017 Open Source Matters, Inc.</copyright>
+	<license>GNU General Public License version 2 or later; see LICENSE.txt</license>
+	<authorEmail>admin@joomla.org</authorEmail>
+	<authorUrl>www.joomla.org</authorUrl>
+	<version>4.0.0</version>
+	<description>PLG_EXTENSION_NAMESPACEMAP_XML_DESCRIPTION</description>
+	<namespace path="src">Joomla\Plugin\Extension\NamespaceMap</namespace>
+	<files>
+		<folder plugin="namespacemap">services</folder>
+		<folder>src</folder>
+	</files>
+	<languages>
+		<language tag="en-GB">language/en-GB/plg_extension_namespacemap.ini</language>
+		<language tag="en-GB">language/en-GB/plg_extension_namespacemap.sys.ini</language>
+	</languages>
+</extension>

plugins/extension/namespacemap/services/provider.php

@@ -0,0 +1,46 @@
+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Extension.namespacemap
+ *
+ * @copyright   (C) 2022 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Extension\PluginInterface;
+use Joomla\CMS\Plugin\PluginHelper;
+use Joomla\DI\Container;
+use Joomla\DI\ServiceProviderInterface;
+use Joomla\Event\DispatcherInterface;
+use Joomla\Plugin\Extension\NamespaceMap\Extension\NamespaceMap;
+
+return new class () implements ServiceProviderInterface {
+    /**
+     * Registers the service provider with a DI container.
+     *
+     * @param   Container  $container  The DI container.
+     *
+     * @return  void
+     *
+     * @since   4.3.0
+     */
+    public function register(Container $container)
+    {
+        $container->set(
+            PluginInterface::class,
+            function (Container $container) {
+                $dispatcher = $container->get(DispatcherInterface::class);
+                $plugin     = new NamespaceMap(
+                    $dispatcher,
+                    new JNamespacePsr4Map(),
+                    (array) PluginHelper::getPlugin('extension', 'namespacemap')
+                );
+
+                return $plugin;
+            }
+        );
+    }
+};

plugins/extension/namespacemap/src/Extension/NamespaceMap.php

@@ -0,0 +1,110 @@
+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Extension.namespacemap
+ *
+ * @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\Plugin\Extension\NamespaceMap\Extension;
+
+use Joomla\CMS\Installer\Installer;
+use Joomla\CMS\Plugin\CMSPlugin;
+use Joomla\Event\DispatcherInterface;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Joomla! namespace map creator / updater.
+ *
+ * @since  4.0.0
+ */
+final class NamespaceMap extends CMSPlugin
+{
+    /**
+     * The namespace map file creator
+     *
+     * @var \JNamespacePsr4Map
+     */
+    private $fileCreator = null;
+
+    /**
+     * Constructor
+     *
+     * @param   DispatcherInterface  $subject  The object to observe
+     * @param   \JNamespacePsr4Map    $map      The namespace map creator
+     * @param   array                $config   An optional associative array of configuration settings.
+     *                                         Recognized key values include 'name', 'group', 'params', 'language'
+     *                                         (this list is not meant to be comprehensive).
+     *
+     * @since   4.0.0
+     */
+    public function __construct(DispatcherInterface $subject, \JNamespacePsr4Map $map, $config = [])
+    {
+        $this->fileCreator = $map;
+
+        parent::__construct($subject, $config);
+    }
+
+    /**
+     * Update / Create map on extension install
+     *
+     * @param   Installer  $installer  Installer instance
+     * @param   integer    $eid        Extension id
+     *
+     * @return  void
+     *
+     * @since   4.0.0
+     */
+    public function onExtensionAfterInstall($installer, $eid)
+    {
+        // Check that we have a valid extension
+        if ($eid) {
+            // Update / Create new map
+            $this->fileCreator->create();
+        }
+    }
+
+    /**
+     * Update / Create map on extension uninstall
+     *
+     * @param   Installer  $installer  Installer instance
+     * @param   integer    $eid        Extension id
+     * @param   boolean    $removed    Installation result
+     *
+     * @return  void
+     *
+     * @since   4.0.0
+     */
+    public function onExtensionAfterUninstall($installer, $eid, $removed)
+    {
+        // Check that we have a valid extension and that it has been removed
+        if ($eid && $removed) {
+            // Update / Create new map
+            $this->fileCreator->create();
+        }
+    }
+
+    /**
+     * Update map on extension update
+     *
+     * @param   Installer  $installer  Installer instance
+     * @param   integer    $eid        Extension id
+     *
+     * @return  void
+     *
+     * @since   4.0.0
+     */
+    public function onExtensionAfterUpdate($installer, $eid)
+    {
+        // Check that we have a valid extension
+        if ($eid) {
+            // Update / Create new map
+            $this->fileCreator->create();
+        }
+    }
+}