6 files changed, 1005 insertions, 0 deletions
diff --git a/phpBB/phpbb/install/controller/archive_download.php b/phpBB/phpbb/install/controller/archive_download.php
new file mode 100644
index 0000000000..eabc0a9976
--- /dev/null
+++ b/phpBB/phpbb/install/controller/archive_download.php
@@ -0,0 +1,93 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\exception\http_exception;
+use phpbb\install\helper\config;
+use Symfony\Component\HttpFoundation\BinaryFileResponse;
+use Symfony\Component\HttpFoundation\ResponseHeaderBag;
+
+class archive_download
+{
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config $config
+	 */
+	public function __construct(config $config)
+	{
+		$this->installer_config = $config;
+		$this->installer_config->load_config();
+	}
+
+	/**
+	 * Sends response with the merge conflict archive
+	 *
+	 * Merge conflicts always have to be resolved manually,
+	 * so we use a different archive for that.
+	 *
+	 * @return BinaryFileResponse
+	 */
+	public function conflict_archive()
+	{
+		$filename = $this->installer_config->get('update_file_conflict_archive', '');
+
+		if (empty($filename))
+		{
+			throw new http_exception(404, 'URL_NOT_FOUND');
+		}
+
+		return $this->send_response($filename);
+	}
+
+	/**
+	 * Sends response with the updated files' archive
+	 *
+	 * @return BinaryFileResponse
+	 */
+	public function update_archive()
+	{
+		$filename = $this->installer_config->get('update_file_archive', '');
+
+		if (empty($filename))
+		{
+			throw new http_exception(404, 'URL_NOT_FOUND');
+		}
+
+		return $this->send_response($filename);
+	}
+
+	/**
+	 * Generates a download response
+	 *
+	 * @param string	$filename	Path to the file to download
+	 *
+	 * @return BinaryFileResponse	Response object
+	 */
+	private function send_response($filename)
+	{
+		$response = new BinaryFileResponse($filename);
+		$response->setContentDisposition(
+			ResponseHeaderBag::DISPOSITION_ATTACHMENT,
+			basename($filename)
+		);
+
+		return $response;
+	}
+}
diff --git a/phpBB/phpbb/install/controller/helper.php b/phpBB/phpbb/install/controller/helper.php
new file mode 100644
index 0000000000..ff7e691224
--- /dev/null
+++ b/phpBB/phpbb/install/controller/helper.php
@@ -0,0 +1,413 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\install\helper\config;
+use phpbb\install\helper\navigation\navigation_provider;
+use phpbb\language\language;
+use phpbb\language\language_file_helper;
+use phpbb\path_helper;
+use phpbb\request\request;
+use phpbb\request\request_interface;
+use phpbb\routing\router;
+use phpbb\symfony_request;
+use phpbb\template\template;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\Cookie;
+
+/**
+ * A duplicate of \phpbb\controller\helper
+ *
+ * This class is necessary because of controller\helper's legacy function calls
+ * to page_header() page_footer() functions which has unavailable dependencies.
+ */
+class helper
+{
+	/**
+	 * @var config
+	 */
+	protected $installer_config;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var bool|string
+	 */
+	protected $language_cookie;
+
+	/**
+	 * @var \phpbb\language\language_file_helper
+	 */
+	protected $lang_helper;
+
+	/**
+	 * @var \phpbb\install\helper\navigation\navigation_provider
+	 */
+	protected $navigation_provider;
+
+	/**
+	 * @var \phpbb\template\template
+	 */
+	protected $template;
+
+	/**
+	 * @var \phpbb\path_helper
+	 */
+	protected $path_helper;
+
+	/**
+	 * @var \phpbb\request\request
+	 */
+	protected $phpbb_request;
+
+	/**
+	 * @var \phpbb\symfony_request
+	 */
+	protected $request;
+
+	/**
+	 * @var \phpbb\routing\router
+	 */
+	protected $router;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_admin_path;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param config				$config
+	 * @param language				$language
+	 * @param language_file_helper	$lang_helper
+	 * @param navigation_provider	$nav
+	 * @param template				$template
+	 * @param path_helper			$path_helper
+	 * @param request				$phpbb_request
+	 * @param symfony_request		$request
+	 * @param router				$router
+	 * @param string				$phpbb_root_path
+	 */
+	public function __construct(config $config, language $language, language_file_helper $lang_helper, navigation_provider $nav, template $template, path_helper $path_helper, request $phpbb_request, symfony_request $request, router $router, $phpbb_root_path)
+	{
+		$this->installer_config = $config;
+		$this->language = $language;
+		$this->language_cookie = false;
+		$this->lang_helper = $lang_helper;
+		$this->navigation_provider = $nav;
+		$this->template = $template;
+		$this->path_helper = $path_helper;
+		$this->phpbb_request = $phpbb_request;
+		$this->request = $request;
+		$this->router = $router;
+		$this->phpbb_root_path = $phpbb_root_path;
+		$this->phpbb_admin_path = $phpbb_root_path . 'adm/';
+	}
+
+	/**
+	 * Automate setting up the page and creating the response object.
+	 *
+	 * @param string	$template_file		The template handle to render
+	 * @param string	$page_title			The title of the page to output
+	 * @param bool		$selected_language	True to enable language selector it, false otherwise
+	 * @param int		$status_code		The status code to be sent to the page header
+	 *
+	 * @return Response object containing rendered page
+	 */
+	public function render($template_file, $page_title = '', $selected_language = false, $status_code = 200)
+	{
+		$this->page_header($page_title, $selected_language);
+
+		$this->template->set_filenames(array(
+			'body'	=> $template_file,
+		));
+
+		$response = new Response($this->template->assign_display('body'), $status_code);
+
+		// Set language cookie
+		if ($this->language_cookie !== false)
+		{
+			$cookie = new Cookie('lang', $this->language_cookie, time() + 3600);
+			$response->headers->setCookie($cookie);
+
+			$this->language_cookie = false;
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Returns path from route name
+	 *
+	 * @param string	$route_name
+	 * @param array		$parameters
+	 *
+	 * @return string
+	 */
+	public function route($route_name, $parameters = array())
+	{
+		$url = $this->router->generate($route_name, $parameters);
+
+		return $url;
+	}
+
+	/**
+	 * Handles language selector form
+	 */
+	public function handle_language_select()
+	{
+		$lang = null;
+
+		// Check if language form has been submited
+		$submit = $this->phpbb_request->variable('change_lang', '');
+		if (!empty($submit))
+		{
+			$lang = $this->phpbb_request->variable('language', '');
+		}
+
+		// Retrieve language from cookie
+		$lang_cookie = $this->phpbb_request->variable('lang', '', false, request_interface::COOKIE);
+		if (empty($lang) && !empty($lang_cookie))
+		{
+			$lang = $lang_cookie;
+		}
+
+		$lang = (!empty($lang) && strpos($lang, '/') === false) ? $lang : null;
+		$this->language_cookie = $lang;
+
+		$this->render_language_select($lang);
+
+		if ($lang !== null)
+		{
+			$this->language->set_user_language($lang, true);
+			$this->installer_config->set('user_language', $lang);
+		}
+	}
+
+	/**
+	 * Process navigation data to reflect active/completed stages
+	 *
+	 * @param \phpbb\install\helper\iohandler\iohandler_interface|null	$iohandler
+	 */
+	public function handle_navigation($iohandler = null)
+	{
+		$nav_data = $this->installer_config->get_navigation_data();
+
+		// Set active navigation stage
+		if (isset($nav_data['active']) && is_array($nav_data['active']))
+		{
+			if ($iohandler !== null)
+			{
+				$iohandler->set_active_stage_menu($nav_data['active']);
+			}
+
+			$this->navigation_provider->set_nav_property($nav_data['active'], array(
+				'selected'	=> true,
+				'completed'	=> false,
+			));
+		}
+
+		// Set finished navigation stages
+		if (isset($nav_data['finished']) && is_array($nav_data['finished']))
+		{
+			foreach ($nav_data['finished'] as $finished_stage)
+			{
+				if ($iohandler !== null)
+				{
+					$iohandler->set_finished_stage_menu($finished_stage);
+				}
+
+				$this->navigation_provider->set_nav_property($finished_stage, array(
+					'selected'	=> false,
+					'completed'	=> true,
+				));
+			}
+		}
+	}
+
+	/**
+	 * Set default template variables
+	 *
+	 * @param string	$page_title			Title of the page
+	 * @param bool		$selected_language	True to enable language selector it, false otherwise
+	 */
+	protected function page_header($page_title, $selected_language = false)
+	{
+		// Path to templates
+		$paths = array($this->phpbb_root_path . 'install/update/new/adm/', $this->phpbb_admin_path);
+		$paths = array_filter($paths, 'is_dir');
+		$path = array_shift($paths);
+		$path = substr($path, strlen($this->phpbb_root_path));
+
+		$this->template->assign_vars(array(
+			'L_CHANGE'				=> $this->language->lang('CHANGE'),
+			'L_COLON'				=> $this->language->lang('COLON'),
+			'L_INSTALL_PANEL'		=> $this->language->lang('INSTALL_PANEL'),
+			'L_SELECT_LANG'			=> $this->language->lang('SELECT_LANG'),
+			'L_SKIP'				=> $this->language->lang('SKIP'),
+			'PAGE_TITLE'			=> $this->language->lang($page_title),
+			'T_IMAGE_PATH'			=> $this->path_helper->get_web_root_path() . $path . 'images',
+			'T_JQUERY_LINK'			=> $this->path_helper->get_web_root_path() . $path . '../assets/javascript/jquery.min.js',
+			'T_TEMPLATE_PATH'		=> $this->path_helper->get_web_root_path() . $path . 'style',
+			'T_ASSETS_PATH'			=> $this->path_helper->get_web_root_path() . $path . '../assets',
+
+			'S_CONTENT_DIRECTION' 	=> $this->language->lang('DIRECTION'),
+			'S_CONTENT_FLOW_BEGIN'	=> ($this->language->lang('DIRECTION') === 'ltr') ? 'left' : 'right',
+			'S_CONTENT_FLOW_END'	=> ($this->language->lang('DIRECTION') === 'ltr') ? 'right' : 'left',
+			'S_CONTENT_ENCODING' 	=> 'UTF-8',
+			'S_LANG_SELECT'			=> $selected_language,
+
+			'S_USER_LANG'			=> $this->language->lang('USER_LANG'),
+		));
+
+		$this->render_navigation();
+	}
+
+	/**
+	 * Render navigation
+	 */
+	protected function render_navigation()
+	{
+		// Get navigation items
+		$nav_array = $this->navigation_provider->get();
+		$nav_array = $this->sort_navigation_level($nav_array);
+
+		$active_main_menu = $this->get_active_main_menu($nav_array);
+
+		// Pass navigation to template
+		foreach ($nav_array as $key => $entry)
+		{
+			$this->template->assign_block_vars('t_block1', array(
+				'L_TITLE' => $this->language->lang($entry['label']),
+				'S_SELECTED' => ($active_main_menu === $key),
+				'U_TITLE' => $this->route($entry['route']),
+			));
+
+			if (is_array($entry[0]) && $active_main_menu === $key)
+			{
+				$entry[0] = $this->sort_navigation_level($entry[0]);
+
+				foreach ($entry[0] as $name => $sub_entry)
+				{
+					if (isset($sub_entry['stage']) && $sub_entry['stage'] === true)
+					{
+						$this->template->assign_block_vars('l_block2', array(
+							'L_TITLE' => $this->language->lang($sub_entry['label']),
+							'S_SELECTED' => (isset($sub_entry['selected']) && $sub_entry['selected'] === true),
+							'S_COMPLETE' => (isset($sub_entry['completed']) && $sub_entry['completed'] === true),
+							'STAGE_NAME' => $name,
+						));
+					}
+					else
+					{
+						$this->template->assign_block_vars('l_block1', array(
+							'L_TITLE' => $this->language->lang($sub_entry['label']),
+							'S_SELECTED' => (isset($sub_entry['route']) && $sub_entry['route'] === $this->request->get('_route')),
+							'U_TITLE' => $this->route($sub_entry['route']),
+						));
+					}
+				}
+			}
+		}
+	}
+
+	/**
+	 * Render language select form
+	 *
+	 * @param string	$selected_language
+	 */
+	protected function render_language_select($selected_language = null)
+	{
+		$langs = $this->lang_helper->get_available_languages();
+		foreach ($langs as $lang)
+		{
+			$this->template->assign_block_vars('language_select_item', array(
+				'VALUE' => $lang['iso'],
+				'NAME' => $lang['local_name'],
+				'SELECTED' => ($lang['iso'] === $selected_language),
+			));
+		}
+	}
+
+	/**
+	 * Returns the name of the active main menu item
+	 *
+	 * @param array	$nav_array
+	 *
+	 * @return string|bool	Returns the name of the active main menu element, if the element not found, returns false
+	 */
+	protected function get_active_main_menu($nav_array)
+	{
+		$active_route = $this->request->get('_route');
+
+		foreach ($nav_array as $nav_name => $nav_options)
+		{
+			$current_menu = $nav_name;
+
+			if (isset($nav_options['route']) && $nav_options['route'] === $active_route)
+			{
+				return $nav_name;
+			}
+
+			if (is_array($nav_options[0]))
+			{
+				foreach ($nav_options[0] as $sub_menus)
+				{
+					if (isset($sub_menus['route']) && $sub_menus['route'] === $active_route)
+					{
+						return $current_menu;
+					}
+				}
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Sorts the top level of navigation array
+	 *
+	 * @param array	$nav_array	Navigation array
+	 *
+	 * @return array
+	 */
+	protected function sort_navigation_level($nav_array)
+	{
+		$sorted = array();
+		foreach ($nav_array as $key => $nav)
+		{
+			$order = (isset($nav['order'])) ? $nav['order'] : 0;
+			$sorted[$order][$key] = $nav;
+		}
+
+		// Linearization of navigation array
+		$nav_array = array();
+		ksort($sorted);
+		foreach ($sorted as $nav)
+		{
+			$nav_array = array_merge($nav_array, $nav);
+		}
+
+		return $nav_array;
+	}
+}
diff --git a/phpBB/phpbb/install/controller/install.php b/phpBB/phpbb/install/controller/install.php
new file mode 100644
index 0000000000..92506872a3
--- /dev/null
+++ b/phpBB/phpbb/install/controller/install.php
@@ -0,0 +1,172 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\exception\http_exception;
+use phpbb\install\helper\install_helper;
+use phpbb\install\helper\navigation\navigation_provider;
+use Symfony\Component\HttpFoundation\StreamedResponse;
+use Symfony\Component\HttpFoundation\Response;
+use phpbb\install\helper\iohandler\factory;
+use phpbb\template\template;
+use phpbb\request\request_interface;
+use phpbb\install\installer;
+use phpbb\language\language;
+
+/**
+ * Controller for installing phpBB
+ */
+class install
+{
+	/**
+	 * @var helper
+	 */
+	protected $controller_helper;
+
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var navigation_provider
+	 */
+	protected $menu_provider;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var template
+	 */
+	protected $template;
+
+	/**
+	 * @var request_interface
+	 */
+	protected $request;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var install_helper
+	 */
+	protected $install_helper;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper 				$helper
+	 * @param factory 				$factory
+	 * @param navigation_provider	$nav_provider
+	 * @param language				$language
+	 * @param template				$template
+	 * @param request_interface		$request
+	 * @param installer				$installer
+	 * @param install_helper		$install_helper
+	 */
+	public function __construct(helper $helper, factory $factory, navigation_provider $nav_provider, language $language, template $template, request_interface $request, installer $installer, install_helper $install_helper)
+	{
+		$this->controller_helper	= $helper;
+		$this->iohandler_factory	= $factory;
+		$this->menu_provider		= $nav_provider;
+		$this->language				= $language;
+		$this->template				= $template;
+		$this->request				= $request;
+		$this->installer			= $installer;
+		$this->install_helper		= $install_helper;
+	}
+
+	/**
+	 * Controller logic
+	 *
+	 * @return Response|StreamedResponse
+	 *
+	 * @throws http_exception When phpBB is already installed
+	 */
+	public function handle()
+	{
+		if ($this->install_helper->is_phpbb_installed())
+		{
+			throw new http_exception(403, 'INSTALL_PHPBB_INSTALLED');
+		}
+
+		$this->template->assign_vars(array(
+			'U_ACTION' => $this->controller_helper->route('phpbb_installer_install'),
+		));
+
+		// Set up input-output handler
+		if ($this->request->is_ajax())
+		{
+			$this->iohandler_factory->set_environment('ajax');
+		}
+		else
+		{
+			$this->iohandler_factory->set_environment('nojs');
+		}
+
+		// Set the appropriate input-output handler
+		$this->installer->set_iohandler($this->iohandler_factory->get());
+		$this->controller_helper->handle_language_select();
+
+		if ($this->request->is_ajax())
+		{
+			$installer = $this->installer;
+			$response = new StreamedResponse();
+			$response->setCallback(function() use ($installer) {
+				$installer->run();
+			});
+
+			// Try to bypass any server output buffers
+			$response->headers->set('X-Accel-Buffering', 'no');
+
+			return $response;
+		}
+		else
+		{
+			// Determine whether the installation was started or not
+			if (true)
+			{
+				// Set active stage
+				$this->menu_provider->set_nav_property(
+					array('install', 0, 'introduction'),
+					array(
+						'selected'	=> true,
+						'completed'	=> false,
+					)
+				);
+
+				// If not, let's render the welcome page
+				$this->template->assign_vars(array(
+					'SHOW_INSTALL_START_FORM'	=> true,
+					'TITLE'						=> $this->language->lang('INSTALL_INTRO'),
+					'CONTENT'					=> $this->language->lang('INSTALL_INTRO_BODY'),
+				));
+
+				/** @var \phpbb\install\helper\iohandler\iohandler_interface $iohandler */
+				$iohandler = $this->iohandler_factory->get();
+				$this->controller_helper->handle_navigation($iohandler);
+
+				return $this->controller_helper->render('installer_install.html', 'INSTALL', true);
+			}
+
+			// @todo: implement no js controller logic
+		}
+	}
+}
diff --git a/phpBB/phpbb/install/controller/installer_index.php b/phpBB/phpbb/install/controller/installer_index.php
new file mode 100644
index 0000000000..c2d9572284
--- /dev/null
+++ b/phpBB/phpbb/install/controller/installer_index.php
@@ -0,0 +1,81 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+class installer_index
+{
+	/**
+	 * @var helper
+	 */
+	protected $helper;
+
+	/**
+	 * @var \phpbb\language\language
+	 */
+	protected $language;
+
+	/**
+	 * @var \phpbb\template\template
+	 */
+	protected $template;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper 					$helper
+	 * @param \phpbb\language\language	$language
+	 * @param \phpbb\template\template	$template
+	 * @param string					$phpbb_root_path
+	 */
+	public function __construct(helper $helper, \phpbb\language\language $language, \phpbb\template\template $template, $phpbb_root_path)
+	{
+		$this->helper = $helper;
+		$this->language = $language;
+		$this->template = $template;
+		$this->phpbb_root_path = $phpbb_root_path;
+	}
+
+	public function handle($mode)
+	{
+		$this->helper->handle_language_select();
+
+		switch ($mode)
+		{
+			case "intro":
+				$title = $this->language->lang('INTRODUCTION_TITLE');
+				$body = $this->language->lang('INTRODUCTION_BODY');
+			break;
+			case "support":
+				$title = $this->language->lang('SUPPORT_TITLE');
+				$body = $this->language->lang('SUPPORT_BODY');
+			break;
+			case "license":
+				$title = $this->language->lang('LICENSE_TITLE');
+				$body = implode("<br/>\n", file($this->phpbb_root_path . 'docs/LICENSE.txt'));
+			break;
+		}
+
+		$this->template->assign_vars(array(
+			'TITLE'	=> $title,
+			'BODY'	=> $body,
+		));
+
+		return $this->helper->render('installer_main.html', $title, true);
+	}
+}
diff --git a/phpBB/phpbb/install/controller/timeout_check.php b/phpBB/phpbb/install/controller/timeout_check.php
new file mode 100644
index 0000000000..1c90e3caf3
--- /dev/null
+++ b/phpBB/phpbb/install/controller/timeout_check.php
@@ -0,0 +1,80 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use Symfony\Component\HttpFoundation\JsonResponse;
+
+class timeout_check
+{
+	/**
+	 * @var helper
+	 */
+	protected $helper;
+
+	/**
+	 * @var string
+	 */
+	protected $phpbb_root_path;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper	$helper
+	 * @param string	$phpbb_root_path
+	 */
+	public function __construct(helper $helper, $phpbb_root_path)
+	{
+		$this->helper = $helper;
+		$this->phpbb_root_path = $phpbb_root_path;
+	}
+
+	/**
+	 * Controller for querying installer status
+	 */
+	public function status()
+	{
+		$lock_file = $this->phpbb_root_path . 'store/io_lock.lock';
+		$response = new JsonResponse();
+
+		if (!file_exists($lock_file))
+		{
+			$response->setData(array(
+				'status' => 'fail',
+			));
+		}
+		else
+		{
+			$fp = @fopen($lock_file, 'r');
+
+			if ($fp && flock($fp, LOCK_EX | LOCK_NB))
+			{
+				$status = (filesize($lock_file) >= 2 && fread($fp, 2) === 'ok') ? 'continue' : 'fail';
+
+				$response->setData(array(
+					'status' => $status,
+				));
+				flock($fp, LOCK_UN);
+				fclose($fp);
+			}
+			else
+			{
+				$response->setData(array(
+					'status' => 'running',
+				));
+			}
+		}
+
+		return $response;
+	}
+}
diff --git a/phpBB/phpbb/install/controller/update.php b/phpBB/phpbb/install/controller/update.php
new file mode 100644
index 0000000000..6b88827940
--- /dev/null
+++ b/phpBB/phpbb/install/controller/update.php
@@ -0,0 +1,166 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\install\controller;
+
+use phpbb\exception\http_exception;
+use phpbb\install\helper\install_helper;
+use phpbb\install\helper\iohandler\factory;
+use phpbb\install\helper\navigation\navigation_provider;
+use phpbb\install\installer;
+use phpbb\language\language;
+use phpbb\request\request_interface;
+use phpbb\template\template;
+use Symfony\Component\HttpFoundation\StreamedResponse;
+
+/**
+ * Updater controller
+ */
+class update
+{
+	/**
+	 * @var helper
+	 */
+	protected $controller_helper;
+
+	/**
+	 * @var installer
+	 */
+	protected $installer;
+
+	/**
+	 * @var install_helper
+	 */
+	protected $install_helper;
+
+	/**
+	 * @var factory
+	 */
+	protected $iohandler_factory;
+
+	/**
+	 * @var language
+	 */
+	protected $language;
+
+	/**
+	 * @var navigation_provider
+	 */
+	protected $menu_provider;
+
+	/**
+	 * @var request_interface
+	 */
+	protected $request;
+
+	/**
+	 * @var template
+	 */
+	protected $template;
+
+	/**
+	 * Constructor
+	 *
+	 * @param helper				$controller_helper
+	 * @param installer				$installer
+	 * @param install_helper		$install_helper
+	 * @param factory				$iohandler
+	 * @param language				$language
+	 * @param navigation_provider	$menu_provider
+	 * @param request_interface		$request
+	 * @param template				$template
+	 */
+	public function __construct(helper $controller_helper, installer $installer, install_helper $install_helper, factory $iohandler, language $language, navigation_provider $menu_provider, request_interface $request, template $template)
+	{
+		$this->controller_helper	= $controller_helper;
+		$this->installer			= $installer;
+		$this->install_helper		= $install_helper;
+		$this->iohandler_factory	= $iohandler;
+		$this->language				= $language;
+		$this->menu_provider		= $menu_provider;
+		$this->request				= $request;
+		$this->template				= $template;
+	}
+
+	/**
+	 * Controller entry point
+	 *
+	 * @return Response|StreamedResponse
+	 *
+	 * @throws http_exception When phpBB is not installed
+	 */
+	public function handle()
+	{
+		if (!$this->install_helper->is_phpbb_installed())
+		{
+			throw new http_exception(403, 'INSTALL_PHPBB_NOT_INSTALLED');
+		}
+
+		$this->template->assign_vars(array(
+			'U_ACTION' => $this->controller_helper->route('phpbb_installer_update'),
+		));
+
+		// Set up input-output handler
+		if ($this->request->is_ajax())
+		{
+			$this->iohandler_factory->set_environment('ajax');
+		}
+		else
+		{
+			$this->iohandler_factory->set_environment('nojs');
+		}
+
+		// Set the appropriate input-output handler
+		$this->installer->set_iohandler($this->iohandler_factory->get());
+		$this->controller_helper->handle_language_select();
+
+		// Render the intro page
+		if ($this->request->is_ajax())
+		{
+			$installer = $this->installer;
+			$response = new StreamedResponse();
+			$response->setCallback(function() use ($installer) {
+				$installer->run();
+			});
+
+			// Try to bypass any server output buffers
+			$response->headers->set('X-Accel-Buffering', 'no');
+			$response->headers->set('Content-type', 'application/json');
+
+			return $response;
+		}
+		else
+		{
+			// Set active stage
+			$this->menu_provider->set_nav_property(
+				array('update', 0, 'introduction'),
+				array(
+					'selected'	=> true,
+					'completed'	=> false,
+				)
+			);
+
+			$this->template->assign_vars(array(
+				'SHOW_INSTALL_START_FORM'	=> true,
+				'TITLE'						=> $this->language->lang('UPDATE_INSTALLATION'),
+				'CONTENT'					=> $this->language->lang('UPDATE_INSTALLATION_EXPLAIN'),
+			));
+
+			/** @var \phpbb\install\helper\iohandler\iohandler_interface $iohandler */
+			$iohandler = $this->iohandler_factory->get();
+			$this->controller_helper->handle_navigation($iohandler);
+
+			return $this->controller_helper->render('installer_update.html', 'UPDATE_INSTALLATION', true);
+		}
+	}
+}