/sources/admin/ManageThemes.controller.php

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<?php

/**
 * This file concerns itself almost completely with theme administration.
 * Its tasks include changing theme settings, installing and removing
 * themes, choosing the current theme, and editing themes.
 *
 * @name      ElkArte Forum
 * @copyright ElkArte Forum contributors
 * @license   BSD http://opensource.org/licenses/BSD-3-Clause
 *
 * This software is a derived product, based on:
 *
 * Simple Machines Forum (SMF)
 * copyright:	2011 Simple Machines (http://www.simplemachines.org)
 * license:		BSD, See included LICENSE.TXT for terms and conditions.
 *
 * @version 1.0.2
 *
 *
 * @todo Update this for the new package manager?
 *
 * Creating and distributing theme packages:
 * There isn't that much required to package and distribute your own themes...
 * just do the following:
 *  - create a theme_info.xml file, with the root element theme-info.
 *  - its name should go in a name element, just like description.
 *  - your name should go in author. (email in the email attribute.)
 *  - any support website for the theme should be in website.
 *  - layers and templates (non-default) should go in those elements ;).
 *  - if the images dir isn't images, specify in the images element.
 *  - any extra rows for themes should go in extra, serialized. (as in array(variable => value).)
 *  - tar and gzip the directory - and you're done!
 *  - please include any special license in a license.txt file.
 */

if (!defined('ELK'))
	die('No access...');

/**
 * Class to deal with theme administration.
 *
 * Its tasks include changing theme settings, installing and removing
 * themes, choosing the current theme, and editing themes.
 *
 * @package Themes
 */
class ManageThemes_Controller extends Action_Controller
{
	/**
	 * Subaction handler - manages the action and delegates control to the proper
	 * sub-action.
	 *
	 * What it does:
	 * - It loads both the Themes and Settings language files.
	 * - Checks the session by GET or POST to verify the sent data.
	 * - Requires the user to not be a guest.
	 * - Accessed via ?action=admin;area=theme.
	 *
	 * @see Action_Controller::action_index()
	 */
	public function action_index()
	{
		global $txt, $context;

		if (isset($_REQUEST['api']))
			return $this->action_index_api();

		// Load the important language files...
		loadLanguage('ManageThemes');
		loadLanguage('Settings');
		require_once(SUBSDIR . '/Action.class.php');

		// No guests in here.
		is_not_guest();

		// Theme administration, removal, choice, or installation...
		$subActions = array(
			'admin' => array($this, 'action_admin', 'permission' => 'admin_forum'),
			'list' => array($this, 'action_list', 'permission' => 'admin_forum'),
			'reset' => array($this, 'action_options', 'permission' => 'admin_forum'),
			'options' => array($this, 'action_options', 'permission' => 'admin_forum'),
			'install' => array($this, 'action_install', 'permission' => 'admin_forum'),
			'remove' => array($this, 'action_remove', 'permission' => 'admin_forum'),
			'pick' => array($this, 'action_pick'),  // @todo ugly having that in this controller
			'edit' => array($this, 'action_edit', 'permission' => 'admin_forum'),
			'copy' => array($this, 'action_copy', 'permission' => 'admin_forum'),
			'themelist' => array($this, 'action_themelist', 'permission' => 'admin_forum'),
			'browse' => array($this, 'action_browse', 'permission' => 'admin_forum'),
		);

		// Action controller
		$action = new Action('manage_themes');

		// @todo Layout Settings?
		if (!empty($context['admin_menu_name']))
		{
			$context[$context['admin_menu_name']]['tab_data'] = array(
				'title' => $txt['themeadmin_title'],
				'description' => $txt['themeadmin_description'],
				'tabs' => array(
					'admin' => array(
						'description' => $txt['themeadmin_admin_desc'],
					),
					'list' => array(
						'description' => $txt['themeadmin_list_desc'],
					),
					'reset' => array(
						'description' => $txt['themeadmin_reset_desc'],
					),
					'edit' => array(
						'description' => $txt['themeadmin_edit_desc'],
					),
					'themelist' => array(
						'description' => $txt['themeadmin_edit_desc'],
					),
					'browse' => array(
						'description' => $txt['themeadmin_edit_desc'],
					),
				),
			);
		}

		// Follow the sa or just go to administration, call integrate_sa_manage_themes
		$subAction = $action->initialize($subActions, 'admin');

		// Default the page title to Theme Administration by default.
		$context['page_title'] = $txt['themeadmin_title'];
		$context['sub_action'] = $subAction;

		// Go to the action, if you have permissions
		$action->dispatch($subAction);
	}

	/**
	 * Responds to an ajax button request, currently only for remove
	 *
	 * @uses generic_xml_buttons sub template
	 */
	public function action_index_api()
	{
		global $txt, $context, $user_info;

		loadTemplate('Xml');

		// Remove any template layers that may have been created, this is XML!
		Template_Layers::getInstance()->removeAll();
		$context['sub_template'] = 'generic_xml_buttons';

		// No guests in here.
		if ($user_info['is_guest'])
		{
			loadLanguage('Errors');
			$context['xml_data'] = array(
				'error' => 1,
				'text' => $txt['not_guests']
			);

			return;
		}

		// Theme administration, removal, choice, or installation...
		// Of all the actions we currently know only this
		$subActions = array(
		// 	'admin' => 'action_admin',
		// 	'list' => 'action_list',
		// 	'reset' => 'action_options',
		// 	'options' => 'action_options',
		// 	'install' => 'action_install',
			'remove' => 'action_remove_api',
		// 	'pick' => 'action_pick',
		// 	'edit' => 'action_edit',
		// 	'copy' => 'action_copy',
		// 	'themelist' => 'action_themelist',
		// 	'browse' => 'action_browse',
		);

		// Follow the sa or just go to administration.
		if (isset($_GET['sa']) && !empty($subActions[$_GET['sa']]))
			$this->{$subActions[$_GET['sa']]}();
		else
		{
			loadLanguage('Errors');
			$context['xml_data'] = array(
				'error' => 1,
				'text' => $txt['error_sa_not_set']
			);
			return;
		}
	}

	/**
	 * This function allows administration of themes and their settings,
	 * as well as global theme settings.
	 *
	 * What it does:
	 * - sets the settings theme_allow, theme_guests, and knownThemes.
	 * - requires the admin_forum permission.
	 * - accessed with ?action=admin;area=theme;sa=admin.
	 *
	 * @uses Themes template
	 * @uses Admin language file
	 */
	public function action_admin()
	{
		global $context, $modSettings;

		loadLanguage('Admin');

		// Saving?
		if (isset($_POST['save']))
		{
			checkSession();
			validateToken('admin-tm');

			// What themes are being made as known to the members
			if (isset($_POST['options']['known_themes']))
				foreach ($_POST['options']['known_themes'] as $key => $id)
					$_POST['options']['known_themes'][$key] = (int) $id;
			else
				fatal_lang_error('themes_none_selectable', false);

			if (!in_array($_POST['options']['theme_guests'], $_POST['options']['known_themes']))
					fatal_lang_error('themes_default_selectable', false);

			// Commit the new settings.
			updateSettings(array(
				'theme_allow' => !empty($_POST['options']['theme_allow']),
				'theme_guests' => $_POST['options']['theme_guests'],
				'knownThemes' => implode(',', $_POST['options']['known_themes']),
			));
			if ((int) $_POST['theme_reset'] == 0 || in_array($_POST['theme_reset'], $_POST['options']['known_themes']))
				updateMemberData(null, array('id_theme' => (int) $_POST['theme_reset']));

			redirectexit('action=admin;area=theme;' . $context['session_var'] . '=' . $context['session_id'] . ';sa=admin');
		}
		// If we aren't submitting - that is, if we are about to...
		else
		{
			loadTemplate('ManageThemes');
			$context['sub_template'] = 'manage_themes';

			// Make our known themes a little easier to work with.
			$knownThemes = !empty($modSettings['knownThemes']) ? explode(',', $modSettings['knownThemes']) : array();

			// Load up all the themes.
			require_once(SUBSDIR . '/Themes.subs.php');
			$context['themes'] = loadThemes($knownThemes);

			// Can we create a new theme?
			$context['can_create_new'] = is_writable(BOARDDIR . '/themes');
			$context['new_theme_dir'] = substr(realpath(BOARDDIR . '/themes/default'), 0, -7);

			// Look for a non existent theme directory. (ie theme87.)
			$theme_dir = BOARDDIR . '/themes/theme';
			$i = 1;
			while (file_exists($theme_dir . $i))
				$i++;
			$context['new_theme_name'] = 'theme' . $i;

			createToken('admin-tm');
		}
	}

	/**
	 * This function lists the available themes and provides an interface
	 * to reset the paths of all the installed themes.
	 *
	 * @uses sub template list_themes, tempalte ManageThemes
	 */
	public function action_list()
	{
		global $context, $boardurl, $txt;

		// Load in the helpers we need
		require_once(SUBSDIR . '/Themes.subs.php');
		loadLanguage('Admin');

		if (isset($_REQUEST['th']))
			return $this->action_setthemesettings();

		// Saving?
		if (isset($_POST['save']))
		{
			checkSession();
			validateToken('admin-tl');

			$themes = installedThemes();

			$setValues = array();
			foreach ($themes as $id => $theme)
			{
				if (file_exists($_POST['reset_dir'] . '/' . basename($theme['theme_dir'])))
				{
					$setValues[] = array($id, 0, 'theme_dir', realpath($_POST['reset_dir'] . '/' . basename($theme['theme_dir'])));
					$setValues[] = array($id, 0, 'theme_url', $_POST['reset_url'] . '/' . basename($theme['theme_dir']));
					$setValues[] = array($id, 0, 'images_url', $_POST['reset_url'] . '/' . basename($theme['theme_dir']) . '/' . basename($theme['images_url']));
				}

				if (isset($theme['base_theme_dir']) && file_exists($_POST['reset_dir'] . '/' . basename($theme['base_theme_dir'])))
				{
					$setValues[] = array($id, 0, 'base_theme_dir', realpath($_POST['reset_dir'] . '/' . basename($theme['base_theme_dir'])));
					$setValues[] = array($id, 0, 'base_theme_url', $_POST['reset_url'] . '/' . basename($theme['base_theme_dir']));
					$setValues[] = array($id, 0, 'base_images_url', $_POST['reset_url'] . '/' . basename($theme['base_theme_dir']) . '/' . basename($theme['base_images_url']));
				}

				cache_put_data('theme_settings-' . $id, null, 90);
			}

			if (!empty($setValues))
				updateThemeOptions($setValues);

			redirectexit('action=admin;area=theme;sa=list;' . $context['session_var'] . '=' . $context['session_id']);
		}

		loadTemplate('ManageThemes');

		$context['themes'] = installedThemes();

		// For each theme, make sure the directory exists, and try to fetch the theme version
		foreach ($context['themes'] as $i => $theme)
		{
			$context['themes'][$i]['theme_dir'] = realpath($context['themes'][$i]['theme_dir']);

			if (file_exists($context['themes'][$i]['theme_dir'] . '/index.template.php'))
			{
				// Fetch the header... a good 256 bytes should be more than enough.
				$fp = fopen($context['themes'][$i]['theme_dir'] . '/index.template.php', 'rb');
				$header = fread($fp, 256);
				fclose($fp);

				// Can we find a version comment, at all?
				if (preg_match('~\*\s@version\s+(.+)[\s]{2}~i', $header, $match) == 1)
					$context['themes'][$i]['version'] = $match[1];
			}

			$context['themes'][$i]['valid_path'] = file_exists($context['themes'][$i]['theme_dir']) && is_dir($context['themes'][$i]['theme_dir']);
		}

		// Off to the template we go
		$context['sub_template'] = 'list_themes';
		addJavascriptVar(array('txt_theme_remove_confirm' => $txt['theme_remove_confirm']), true);
		$context['reset_dir'] = realpath(BOARDDIR . '/themes');
		$context['reset_url'] = $boardurl . '/themes';

		createToken('admin-tl');
		createToken('admin-tr', 'request');
	}

	/**
	 * Administrative global settings.
	 *
	 * - Accessed by ?action=admin;area=theme;sa=reset;
	 *
	 * @uses sub template set_options, template file Settings
	 * @uses template file ManageThemes
	 */
	public function action_options()
	{
		global $txt, $context, $settings, $modSettings;

		require_once(SUBSDIR . '/Themes.subs.php');
		$theme = isset($_GET['th']) ? (int) $_GET['th'] : (isset($_GET['id']) ? (int) $_GET['id'] : 0);

		if (empty($theme) && empty($_GET['id']))
		{
			$context['themes'] = installedThemes();

			// How many options do we have setup for guests?
			$guestOptions = countConfiguredGuestOptions();
			foreach ($guestOptions as $guest_option)
				$context['themes'][$guest_option['id_theme']]['num_default_options'] = $guest_option['value'];

			// How many options do we have setup for members?
			$memberOptions = countConfiguredMemberOptions();
			foreach ($memberOptions as $member_option)
				$context['themes'][$member_option['id_theme']]['num_members'] = $member_option['value'];

			// There has to be a Settings template!
			foreach ($context['themes'] as $k => $v)
				if (empty($v['theme_dir']) || (!file_exists($v['theme_dir'] . '/Settings.template.php') && empty($v['num_members'])))
					unset($context['themes'][$k]);

			loadTemplate('ManageThemes');
			$context['sub_template'] = 'reset_list';

			createToken('admin-stor', 'request');
			return;
		}

		// Submit?
		if (isset($_POST['submit']) && empty($_POST['who']))
		{
			checkSession();
			validateToken('admin-sto');

			if (empty($_POST['options']))
				$_POST['options'] = array();

			if (empty($_POST['default_options']))
				$_POST['default_options'] = array();

			// Set up the query values.
			$setValues = array();
			foreach ($_POST['options'] as $opt => $val)
				$setValues[] = array($theme, -1, $opt, is_array($val) ? implode(',', $val) : $val);

			$old_settings = array();
			foreach ($_POST['default_options'] as $opt => $val)
			{
				$old_settings[] = $opt;
				$setValues[] = array(1, -1, $opt, is_array($val) ? implode(',', $val) : $val);
			}

			// If we're actually inserting something..
			if (!empty($setValues))
			{
				// Are there options in non-default themes set that should be cleared?
				if (!empty($old_settings))
					removeThemeOptions('custom', 'guests', $old_settings);

				updateThemeOptions($setValues);
			}

			// Cache the theme settings
			cache_put_data('theme_settings-' . $theme, null, 90);
			cache_put_data('theme_settings-1', null, 90);

			redirectexit('action=admin;area=theme;' . $context['session_var'] . '=' . $context['session_id'] . ';sa=reset');
		}
		// Changing the current options for all members using this theme
		elseif (isset($_POST['submit']) && $_POST['who'] == 1)
		{
			checkSession();
			validateToken('admin-sto');

			$_POST['options'] = empty($_POST['options']) ? array() : $_POST['options'];
			$_POST['options_master'] = empty($_POST['options_master']) ? array() : $_POST['options_master'];
			$_POST['default_options'] = empty($_POST['default_options']) ? array() : $_POST['default_options'];
			$_POST['default_options_master'] = empty($_POST['default_options_master']) ? array() : $_POST['default_options_master'];

			$old_settings = array();
			foreach ($_POST['default_options'] as $opt => $val)
			{
				if ($_POST['default_options_master'][$opt] == 0)
					continue;
				elseif ($_POST['default_options_master'][$opt] == 1)
				{
					// Delete then insert for ease of database compatibility!
					removeThemeOptions('default', 'members', $opt);
					addThemeOptions(1, $opt, $val);

					$old_settings[] = $opt;
				}
				elseif ($_POST['default_options_master'][$opt] == 2)
					removeThemeOptions('all', 'members', $opt);
			}

			// Delete options from other themes.
			if (!empty($old_settings))
				removeThemeOptions('custom', 'members', $old_settings);

			foreach ($_POST['options'] as $opt => $val)
			{
				if ($_POST['options_master'][$opt] == 0)
					continue;
				elseif ($_POST['options_master'][$opt] == 1)
				{
					// Delete then insert for ease of database compatibility - again!
					removeThemeOptions($theme, 'non_default', $opt);
					addThemeOptions($theme, $opt, $val);
				}
				elseif ($_POST['options_master'][$opt] == 2)
					removeThemeOptions($theme, 'all', $opt);
			}

			redirectexit('action=admin;area=theme;' . $context['session_var'] . '=' . $context['session_id'] . ';sa=reset');
		}
		// Remove all members options and use the defaults
		elseif (!empty($_GET['who']) && $_GET['who'] == 2)
		{
			checkSession('get');
			validateToken('admin-stor', 'request');

			removeThemeOptions($theme, 'members');

			redirectexit('action=admin;area=theme;' . $context['session_var'] . '=' . $context['session_id'] . ';sa=reset');
		}

		$old_id = $settings['theme_id'];
		$old_settings = $settings;

		loadTheme($theme, false);
		loadLanguage('Profile');

		// @todo Should we just move these options so they are no longer theme dependant?
		loadLanguage('PersonalMessage');

		// Let the theme take care of the settings.
		loadTemplate('Settings');
		loadSubTemplate('options');

		// Set up for the template
		$context['sub_template'] = 'set_options';
		$context['page_title'] = $txt['theme_settings'];
		$context['options'] = $context['theme_options'];
		$context['theme_settings'] = $settings;

		// Load the options for these theme
		if (empty($_REQUEST['who']))
		{
			$context['theme_options'] = loadThemeOptionsInto(array(1, $theme), -1, $context['theme_options']);
			$context['theme_options_reset'] = false;
		}
		else
		{
			$context['theme_options'] = array();
			$context['theme_options_reset'] = true;
		}

		// Prepare the options for the template
		foreach ($context['options'] as $i => $setting)
		{
			// Is this disabled?
			if ($setting['id'] == 'calendar_start_day' && empty($modSettings['cal_enabled']))
			{
				unset($context['options'][$i]);
				continue;
			}
			elseif (($setting['id'] == 'topics_per_page' || $setting['id'] == 'messages_per_page') && !empty($modSettings['disableCustomPerPage']))
			{
				unset($context['options'][$i]);
				continue;
			}

			// Type of field so we display the right input field
			if (!isset($setting['type']) || $setting['type'] == 'bool')
				$context['options'][$i]['type'] = 'checkbox';
			elseif ($setting['type'] == 'int' || $setting['type'] == 'integer')
				$context['options'][$i]['type'] = 'number';
			elseif ($setting['type'] == 'string')
				$context['options'][$i]['type'] = 'text';

			if (isset($setting['options']))
				$context['options'][$i]['type'] = 'list';

			$context['options'][$i]['value'] = !isset($context['theme_options'][$setting['id']]) ? '' : $context['theme_options'][$setting['id']];
		}

		// Restore the existing theme.
		loadTheme($old_id, false);
		$settings = $old_settings;

		loadTemplate('ManageThemes');
		createToken('admin-sto');
	}

	/**
	 * Administrative global settings.
	 *
	 * What it does:
	 * - Saves and requests global theme settings. ($settings)
	 * - Loads the Admin language file.
	 * - Calls action_admin() if no theme is specified. (the theme center.)
	 * - Requires admin_forum permission.
	 * - Accessed with ?action=admin;area=theme;sa=list&th=xx.
	 */
	public function action_setthemesettings()
	{
		global $txt, $context, $settings, $modSettings;

		require_once(SUBSDIR . '/Themes.subs.php');

		// Nothing chosen, back to the start you go
		if (empty($_GET['th']) && empty($_GET['id']))
			return $this->action_admin();

		// The theme's ID is needed
		$theme = isset($_GET['th']) ? (int) $_GET['th'] : (int) $_GET['id'];

		// Validate inputs/user.
		if (empty($theme))
			fatal_lang_error('no_theme', false);

		// Select the best fitting tab.
		$context[$context['admin_menu_name']]['current_subsection'] = 'list';
		loadLanguage('Admin');

		// Fetch the smiley sets...
		$sets = explode(',', 'none,' . $modSettings['smiley_sets_known']);
		$set_names = explode("\n", $txt['smileys_none'] . "\n" . $modSettings['smiley_sets_names']);
		$context['smiley_sets'] = array(
			'' => $txt['smileys_no_default']
		);
		foreach ($sets as $i => $set)
			$context['smiley_sets'][$set] = htmlspecialchars($set_names[$i], ENT_COMPAT, 'UTF-8');

		$old_id = $settings['theme_id'];
		$old_settings = $settings;

		loadTheme($theme, false);

		// Also load the actual themes language file - in case of special settings.
		loadLanguage('Settings', '', true, true);

		// And the custom language strings...
		loadLanguage('ThemeStrings', '', false, true);

		// Let the theme take care of the settings.
		loadTemplate('Settings');
		loadSubTemplate('settings');

		// Load the variants separately...
		$settings['theme_variants'] = array();
		if (file_exists($settings['theme_dir'] . '/index.template.php'))
		{
			$file_contents = implode("\n", file($settings['theme_dir'] . '/index.template.php'));
			if (preg_match('~\'theme_variants\'\s*=>(.+?\)),$~sm', $file_contents, $matches))
				eval('global $settings; $settings[\'theme_variants\'] = ' . $matches[1] . ';');

				call_integration_hook('integrate_init_theme', array($theme, &$settings));
		}

		// Submitting!
		if (isset($_POST['save']))
		{
			// Allowed?
			checkSession();
			validateToken('admin-sts');

			if (empty($_POST['options']))
				$_POST['options'] = array();
			if (empty($_POST['default_options']))
				$_POST['default_options'] = array();

			// Make sure items are cast correctly.
			foreach ($context['theme_settings'] as $item)
			{
				// Unwatch this item if this is just a separator.
				if (!is_array($item))
					continue;

				// Clean them up for the database
				foreach (array('options', 'default_options') as $option)
				{
					if (!isset($_POST[$option][$item['id']]))
						continue;
					// Checkbox.
					elseif (empty($item['type']))
						$_POST[$option][$item['id']] = $_POST[$option][$item['id']] ? 1 : 0;
					// Number
					elseif ($item['type'] == 'number')
						$_POST[$option][$item['id']] = (int) $_POST[$option][$item['id']];
				}
			}

			// Set up the sql query.
			$inserts = array();
			foreach ($_POST['options'] as $opt => $val)
				$inserts[] = array($theme, 0, $opt, is_array($val) ? implode(',', $val) : $val);

			foreach ($_POST['default_options'] as $opt => $val)
				$inserts[] = array(1, 0, $opt, is_array($val) ? implode(',', $val) : $val);

			// If we're actually inserting something..
			if (!empty($inserts))
				updateThemeOptions($inserts);

			// Clear and Invalidate the cache.
			cache_put_data('theme_settings-' . $theme, null, 90);
			cache_put_data('theme_settings-1', null, 90);
			updateSettings(array('settings_updated' => time()));

			redirectexit('action=admin;area=theme;sa=list;th=' . $theme . ';' . $context['session_var'] . '=' . $context['session_id']);
		}

		$context['sub_template'] = 'set_settings';
		$context['page_title'] = $txt['theme_settings'];

		foreach ($settings as $setting => $dummy)
		{
			if (!in_array($setting, array('theme_url', 'theme_dir', 'images_url', 'template_dirs')))
				$settings[$setting] = htmlspecialchars__recursive($settings[$setting]);
		}

		$context['settings'] = $context['theme_settings'];
		$context['theme_settings'] = $settings;

		foreach ($context['settings'] as $i => $setting)
		{
			// Separators are dummies, so leave them alone.
			if (!is_array($setting))
				continue;

			// Create the right input fields for the data
			if (!isset($setting['type']) || $setting['type'] == 'bool')
				$context['settings'][$i]['type'] = 'checkbox';
			elseif ($setting['type'] == 'int' || $setting['type'] == 'integer')
				$context['settings'][$i]['type'] = 'number';
			elseif ($setting['type'] == 'string')
				$context['settings'][$i]['type'] = 'text';

			if (isset($setting['options']))
				$context['settings'][$i]['type'] = 'list';

			$context['settings'][$i]['value'] = !isset($settings[$setting['id']]) ? '' : $settings[$setting['id']];
		}

		// Do we support variants?
		if (!empty($settings['theme_variants']))
		{
			$context['theme_variants'] = array();
			foreach ($settings['theme_variants'] as $variant)
			{
				// Have any text, old chap?
				$context['theme_variants'][$variant] = array(
					'label' => isset($txt['variant_' . $variant]) ? $txt['variant_' . $variant] : $variant,
					'thumbnail' => !file_exists($settings['theme_dir'] . '/images/thumbnail.png') || file_exists($settings['theme_dir'] . '/images/thumbnail_' . $variant . '.png') ? $settings['images_url'] . '/thumbnail_' . $variant . '.png' : ($settings['images_url'] . '/thumbnail.png'),
				);
			}
			$context['default_variant'] = !empty($settings['default_variant']) && isset($context['theme_variants'][$settings['default_variant']]) ? $settings['default_variant'] : $settings['theme_variants'][0];
		}

		// Restore the current theme.
		loadTheme($old_id, false);

		$settings = $old_settings;

		// Reinit just incase.
		if (function_exists('template_init'))
			$settings += template_init();

		loadTemplate('ManageThemes');

		// We like Kenny better than Token.
		createToken('admin-sts');
	}

	/**
	 * Remove a theme from the database.
	 *
	 * What it does:
	 * - Removes an installed theme.
	 * - Requires an administrator.
	 * - Accessed with ?action=admin;area=theme;sa=remove.
	 */
	public function action_remove()
	{
		global $modSettings, $context;

		require_once(SUBSDIR . '/Themes.subs.php');

		checkSession('get');
		validateToken('admin-tr', 'request');

		// The theme's ID must be an integer.
		$theme = isset($_GET['th']) ? (int) $_GET['th'] : (int) $_GET['id'];

		// You can't delete the default theme!
		if ($theme == 1)
			fatal_lang_error('no_access', false);

		// Its no longer known
		$known = explode(',', $modSettings['knownThemes']);
		for ($i = 0, $n = count($known); $i < $n; $i++)
		{
			if ($known[$i] == $theme)
				unset($known[$i]);
		}
		$known = strtr(implode(',', $known), array(',,' => ','));

		// Remove it as an option everywhere
		deleteTheme($theme);

		// Fix it if the theme was the overall default theme.
		if ($modSettings['theme_guests'] == $theme)
			updateSettings(array('theme_guests' => '1', 'knownThemes' => $known));
		else
			updateSettings(array('knownThemes' => $known));

		redirectexit('action=admin;area=theme;sa=list;' . $context['session_var'] . '=' . $context['session_id']);
	}

	/**
	 * Remove a theme from the database in response to an ajax api request
	 *
	 * What it does:
	 * - Removes an installed theme.
	 * - Requires an administrator.
	 * - Accessed with ?action=admin;area=theme;sa=remove;api
	 */
	public function action_remove_api()
	{
		global $modSettings, $context, $txt;

		require_once(SUBSDIR . '/Themes.subs.php');

		// Validate what was sent
		if (checkSession('get', '', false))
		{
			loadLanguage('Errors');
			$context['xml_data'] = array(
				'error' => 1,
				'text' => $txt['session_verify_fail'],
			);

			return;
		}

		// Not just any John Smith can send in a api request
		if (!allowedTo('admin_forum'))
		{
			loadLanguage('Errors');
			$context['xml_data'] = array(
				'error' => 1,
				'text' => $txt['cannot_admin_forum'],
			);
			return;
		}

		// Even if you are John Smith, you still neeed a ticket
		if (!validateToken('admin-tr', 'request', true, false))
		{
			loadLanguage('Errors');
			$context['xml_data'] = array(
				'error' => 1,
				'text' => $txt['token_verify_fail'],
			);

			return;
		}

		// The theme's ID must be an integer.
		$theme = isset($_GET['th']) ? (int) $_GET['th'] : (int) $_GET['id'];

		// You can't delete the default theme!
		if ($theme == 1)
		{
			loadLanguage('Errors');
			$context['xml_data'] = array(
				'error' => 1,
				'text' => $txt['no_access'],
			);
			return;
		}

		// It is a theme we know about?
		$known = explode(',', $modSettings['knownThemes']);
		for ($i = 0, $n = count($known); $i < $n; $i++)
		{
			if ($known[$i] == $theme)
				unset($known[$i]);
		}

		// Finally, remove it
		deleteTheme($theme);

		$known = strtr(implode(',', $known), array(',,' => ','));

		// Fix it if the theme was the overall default theme.
		if ($modSettings['theme_guests'] == $theme)
			updateSettings(array('theme_guests' => '1', 'knownThemes' => $known));
		else
			updateSettings(array('knownThemes' => $known));

		// Let them know it worked, all without a page refresh
		createToken('admin-tr', 'request');
		$context['xml_data'] = array(
			'success' => 1,
			'token_var' => $context['admin-tr_token_var'],
			'token' => $context['admin-tr_token'],
		);
	}

	/**
	 * Choose a theme from a list.
	 * Allows a user or administrator to pick a new theme with an interface.
	 *
	 * What it does:
	 * - Can edit everyone's (u = 0), guests' (u = -1), or a specific user's.
	 * - Uses the Themes template. (pick sub template.)
	 * - Accessed with ?action=admin;area=theme;sa=pick.
	 *
	 * @uses Profile language text
	 * @uses ManageThemes template
	 * @todo thought so... Might be better to split this file in ManageThemes and Themes,
	 * with centralized admin permissions on ManageThemes.
	 */
	public function action_pick()
	{
		global $txt, $context, $modSettings, $user_info, $scripturl, $settings;

		require_once(SUBSDIR . '/Themes.subs.php');

		if (!$modSettings['theme_allow'] && $settings['disable_user_variant'] && !allowedTo('admin_forum'))
			fatal_lang_error('no_access', false);

		loadLanguage('Profile');
		loadTemplate('ManageThemes');

		// Build the link tree.
		$context['linktree'][] = array(
			'url' => $scripturl . '?action=theme;sa=pick;u=' . (!empty($_REQUEST['u']) ? (int) $_REQUEST['u'] : 0),
			'name' => $txt['theme_pick'],
		);
		$context['default_theme_id'] = $modSettings['theme_default'];

		$_SESSION['id_theme'] = 0;

		if (isset($_GET['id']))
			$_GET['th'] = $_GET['id'];

		// Saving a variant cause JS doesn't work - pretend it did ;)
		if (isset($_POST['save']))
		{
			// Which theme?
			foreach ($_POST['save'] as $k => $v)
				$_GET['th'] = (int) $k;

			if (isset($_POST['vrt'][$k]))
				$_GET['vrt'] = $_POST['vrt'][$k];
		}

		// Have we made a decision, or are we just browsing?
		if (isset($_GET['th']))
		{
			checkSession('get');

			$_GET['th'] = (int) $_GET['th'];

			// Save for this user.
			if (!isset($_REQUEST['u']) || !allowedTo('admin_forum'))
			{
				updateMemberData($user_info['id'], array('id_theme' => (int) $_GET['th']));

				// A variants to save for the user?
				if (!empty($_GET['vrt']))
				{
					updateThemeOptions(array($_GET['th'], $user_info['id'], 'theme_variant', $_GET['vrt']));

					cache_put_data('theme_settings-' . $_GET['th'] . ':' . $user_info['id'], null, 90);

					$_SESSION['id_variant'] = 0;
				}

				redirectexit('action=profile;area=theme');
			}

			// If changing members or guests - and there's a variant - assume changing default variant.
			if (!empty($_GET['vrt']) && ($_REQUEST['u'] == '0' || $_REQUEST['u'] == '-1'))
			{
				updateThemeOptions(array($_GET['th'], 0, 'default_variant', $_GET['vrt']));

				// Make it obvious that it's changed
				cache_put_data('theme_settings-' . $_GET['th'], null, 90);
			}

			// For everyone.
			if ($_REQUEST['u'] == '0')
			{
				updateMemberData(null, array('id_theme' => (int) $_GET['th']));

				// Remove any custom variants.
				if (!empty($_GET['vrt']))
					deleteVariants((int) $_GET['th']);

				redirectexit('action=admin;area=theme;sa=admin;' . $context['session_var'] . '=' . $context['session_id']);
			}
			// Change the default/guest theme.
			elseif ($_REQUEST['u'] == '-1')
			{
				updateSettings(array('theme_guests' => (int) $_GET['th']));

				redirectexit('action=admin;area=theme;sa=admin;' . $context['session_var'] . '=' . $context['session_id']);
			}
			// Change a specific member's theme.
			else
			{
				// The forum's default theme is always 0 and we
				if (isset($_GET['th']) && $_GET['th'] == 0)
						$_GET['th'] = $modSettings['theme_guests'];

				updateMemberData((int) $_REQUEST['u'], array('id_theme' => (int) $_GET['th']));

				if (!empty($_GET['vrt']))
				{
					updateThemeOptions(array($_GET['th'], (int) $_REQUEST['u'], 'theme_variant', $_GET['vrt']));
					cache_put_data('theme_settings-' . $_GET['th'] . ':' . (int) $_REQUEST['u'], null, 90);

					if ($user_info['id'] == $_REQUEST['u'])
						$_SESSION['id_variant'] = 0;
				}

				redirectexit('action=profile;u=' . (int) $_REQUEST['u'] . ';area=theme');
			}
		}

		// Figure out who the member of the minute is, and what theme they've chosen.
		if (!isset($_REQUEST['u']) || !allowedTo('admin_forum'))
		{
			$context['current_member'] = $user_info['id'];
			$current_theme = $user_info['theme'];
		}
		// Everyone can't chose just one.
		elseif ($_REQUEST['u'] == '0')
		{
			$context['current_member'] = 0;
			$current_theme = 0;
		}
		// Guests and such...
		elseif ($_REQUEST['u'] == '-1')
		{
			$context['current_member'] = -1;
			$current_theme = $modSettings['theme_guests'];
		}
		// Someones else :P.
		else
		{
			$context['current_member'] = (int) $_REQUEST['u'];

			require_once(SUBSDIR . '/Members.subs.php');
			$member = getBasicMemberData($context['current_member']);

			$current_theme = $member['id_theme'];
		}

		// Get the theme name and descriptions.
		list ($context['available_themes'], $guest_theme) = availableThemes($current_theme, $context['current_member']);

		// As long as we're not doing the default theme...
		if (!isset($_REQUEST['u']) || $_REQUEST['u'] >= 0)
		{
			if ($guest_theme != 0)
				$context['available_themes'][0] = $context['available_themes'][$guest_theme];

			$context['available_themes'][0]['id'] = 0;
			$context['available_themes'][0]['name'] = $txt['theme_forum_default'];
			$context['available_themes'][0]['selected'] = $current_theme == 0;
			$context['available_themes'][0]['description'] = $txt['theme_global_description'];
		}

		ksort($context['available_themes']);

		$context['page_title'] = $txt['theme_pick'];
		$context['sub_template'] = 'pick';
	}

	/**
	 * Installs new themes, either from a gzip or copy of the default.
	 *
	 * What it does:
	 * - Puts themes in $boardurl/themes.
	 * - Assumes the gzip has a root directory in it. (ie default.)
	 * - Requires admin_forum.
	 * - Accessed with ?action=admin;area=theme;sa=install.
	 *
	 * @uses ManageThemes template
	 */
	public function action_install()
	{
		global $boardurl, $txt, $context, $settings, $modSettings;

		checkSession('request');

		require_once(SUBSDIR . '/Themes.subs.php');
		require_once(SUBSDIR . '/Package.subs.php');

		loadTemplate('ManageThemes');

		// Passed an ID, then the install is complete, lets redirect and show them
		if (isset($_GET['theme_id']))
		{
			$_GET['theme_id'] = (int) $_GET['theme_id'];

			$context['sub_template'] = 'installed';
			$context['page_title'] = $txt['theme_installed'];
			$context['installed_theme'] = array(
				'id' => $_GET['theme_id'],
				'name' => getThemeName($_GET['theme_id']),
			);

			return;
		}

		// How are we going to install this theme, from a dir, zip, copy of default?
		if ((!empty($_FILES['theme_gz']) && (!isset($_FILES['theme_gz']['error']) || $_FILES['theme_gz']['error'] != 4)) || !empty($_REQUEST['theme_gz']))
			$method = 'upload';
		elseif (isset($_REQUEST['theme_dir']) && rtrim(realpath($_REQUEST['theme_dir']), '/\\') != realpath(BOARDDIR . '/themes') && file_exists($_REQUEST['theme_dir']))
			$method = 'path';
		else
			$method = 'copy';

		// Copy the default theme?
		if (!empty($_REQUEST['copy']) && $method == 'copy')
		{
			// Hopefully the themes directory is writable, or we might have a problem.
			if (!is_writable(BOARDDIR . '/themes'))
				fatal_lang_error('theme_install_write_error', 'critical');

			// Make the new directory, standard characters only
			$theme_dir = BOARDDIR . '/themes/' . preg_replace('~[^A-Za-z0-9_\- ]~', '', $_REQUEST['copy']);
			umask(0);
			mkdir($theme_dir, 0777);

			// Get some more time if we can
			@set_time_limit(600);
			if (function_exists('apache_reset_timeout'))
				@apache_reset_timeout();

			// Create the subdirectories for css, javascript and font files.
			mkdir($theme_dir . '/css', 0777);
			mkdir($theme_dir . '/scripts', 0777);
			mkdir($theme_dir . '/webfonts', 0777);

			// Copy over the default non-theme files.
			$to_copy = array('/index.php', '/index.template.php', '/scripts/theme.js');
			foreach ($to_copy as $file)
			{
				copy($settings['default_theme_dir'] . $file, $theme_dir . $file);
				@chmod($theme_dir . $file, 0777);
			}

			// And now the entire css, images and webfonts directories!
			copytree($settings['default_theme_dir'] . '/css', $theme_dir . '/css');
			copytree($settings['default_theme_dir'] . '/images', $theme_dir . '/images');
			copytree($settings['default_theme_dir'] . '/webfonts', $theme_dir . '/webfonts');
			package_flush_cache();

			$theme_name = $_REQUEST['copy'];
			$images_url = $boardurl . '/themes/' . basename($theme_dir) . '/images';
			$theme_dir = realpath($theme_dir);

			// Lets get some data for the new theme (default theme (1), default settings (0)).
			$theme_values = loadThemeOptionsInto(1, 0, array(), array('theme_templates', 'theme_layers'));

			// Lets add a theme_info.xml to this theme.
			write_theme_info($_REQUEST['copy'], $modSettings['elkVersion'], $theme_dir, $theme_values);
		}
		// Install from another directory
		elseif (isset($_REQUEST['theme_dir']) && $method == 'path')
		{
			if (!is_dir($_REQUEST['theme_dir']) || !file_exists($_REQUEST['theme_dir'] . '/theme_info.xml'))
				fatal_lang_error('theme_install_error', false);

			$theme_name = basename($_REQUEST['theme_dir']);
			$theme_dir = $_REQUEST['theme_dir'];
		}
		// Uploaded a zip file to install from
		elseif ($method == 'upload')
		{
			// Hopefully the themes directory is writable, or we might have a problem.
			if (!is_writable(BOARDDIR . '/themes'))
				fatal_lang_error('theme_install_write_error', 'critical');

			// This happens when the admin session is gone and the user has to login again
			if (empty($_FILES['theme_gz']) && empty($_REQUEST['theme_gz']))
				redirectexit('action=admin;area=theme;sa=admin;' . $context['session_var'] . '=' . $context['session_id']);

			// Set the default settings...
			$theme_name = strtok(basename(isset($_FILES['theme_gz']) ? $_FILES['theme_gz']['name'] : $_REQUEST['theme_gz']), '.');
			$theme_name = preg_replace(array('/\s/', '/\.[\.]+/', '/[^\w_\.\-]/'), array('_', '.', ''), $theme_name);
			$theme_dir = BOARDDIR . '/themes/' . $theme_name;

			if (isset($_FILES['theme_gz']) && is_uploaded_file($_FILES['theme_gz']['tmp_name']) && (ini_get('open_basedir') != '' || file_exists($_FILES['theme_gz']['tmp_name'])))
				read_tgz_file($_FILES['theme_gz']['tmp_name'], BOARDDIR . '/themes/' . $theme_name, false, true);
			elseif (isset($_REQUEST['theme_gz']))
			{
				if (!isAuthorizedServer($_REQUEST['theme_gz']))
					fatal_lang_error('not_valid_server');

				read_tgz_file($_REQUEST['theme_gz'], BOARDDIR . '/themes/' . $theme_name, false, true);
			}
			else
				redirectexit('action=admin;area=theme;sa=admin;' . $context['session_var'] . '=' . $context['session_id']);
		}
		else
			fatal_lang_error('theme_install_general', false);

		// Something go wrong?
		if ($theme_dir != '' && basename($theme_dir) != 'themes')
		{
			// Defaults.
			$install_info = array(
				'theme_url' => $boardurl . '/themes/' . basename($theme_dir),
				'images_url' => isset($images_url) ? $images_url : $boardurl . '/themes/' . basename($theme_dir) . '/images',
				'theme_dir' => $theme_dir,
				'name' => $theme_name
			);
			$explicit_images = false;

			if (file_exists($theme_dir . '/theme_info.xml'))
			{
				$theme_info = file_get_contents($theme_dir . '/theme_info.xml');

				// Parse theme-info.xml into an Xml_Array.
				require_once(SUBSDIR . '/XmlArray.class.php');
				$theme_info_xml = new Xml_Array($theme_info);

				// @todo Error message of some sort?
				if (!$theme_info_xml->exists('theme-info[0]'))
					return 'package_get_error_packageinfo_corrupt';

				$theme_info_xml = $theme_info_xml->path('theme-info[0]');
				$theme_info_xml = $theme_info_xml->to_array();

				$xml_elements = array(
					'name' => 'name',
					'theme_layers' => 'layers',
					'theme_templates' => 'templates',
					'based_on' => 'based-on',
				);
				foreach ($xml_elements as $var => $name)
				{
					if (!empty($theme_info_xml[$name]))
						$install_info[$var] = $theme_info_xml[$name];
				}

				if (!empty($theme_info_xml['images']))
				{
					$install_info['images_url'] = $install_info['theme_url'] . '/' . $theme_info_xml['images'];
					$explicit_images = true;
				}

				if (!empty($theme_info_xml['extra']))
					$install_info += unserialize($theme_info_xml['extra']);
			}

			if (isset($install_info['based_on']))
			{
				if ($install_info['based_on'] == 'default')
				{
					$install_info['theme_url'] = $settings['default_theme_url'];
					$install_info['images_url'] = $settings['default_images_url'];
				}
				elseif ($install_info['based_on'] != '')
				{
					$install_info['based_on'] = preg_replace('~[^A-Za-z0-9\-_ ]~', '', $install_info['based_on']);

					$temp = loadBasedOnTheme($install_info['based_on'], $explicit_images);

					// @todo An error otherwise?
					if (is_array($temp))
					{
						$install_info = $temp + $install_info;

						if (empty($explicit_images) && !empty($install_info['base_theme_url']))
							$install_info['theme_url'] = $install_info['base_theme_url'];
					}
				}

				unset($install_info['based_on']);
			}

			// Find the newest id_theme.
			$id_theme = nextTheme();

			$inserts = array();
			foreach ($install_info as $var => $val)
				$inserts[] = array($id_theme, $var, $val);

			if (!empty($inserts))
				addTheme($inserts);

			updateSettings(array('knownThemes' => strtr($modSettings['knownThemes'] . ',' . $id_theme, array(',,' => ','))));
		}

		redirectexit('action=admin;area=theme;sa=install;theme_id=' . $id_theme . ';' . $context['session_var'] . '=' . $context['session_id']);
	}

	/**
	 * Set a theme option via javascript.
	 *
	 * What it does:
	 * - sets a theme option without outputting anything.
	 * - can be used with javascript, via a dummy image... (which doesn't require
	 *   the page to reload.)
	 * - requires someone who is logged in.
	 * - accessed via ?action=jsoption;var=variable;val=value;session_var=sess_id.
	 * - optionally contains &th=theme id
	 * - does not log access to the Who's Online log. (in index.php..)
	 */
	public function action_jsoption()
	{
		global $settings, $user_info, $options, $modSettings;

		// Check the session id.
		checkSession('get');

		// This good-for-nothing pixel is being used to keep the session alive.
		if (empty($_GET['var']) || !isset($_GET['val']))
			redirectexit($settings['images_url'] . '/blank.png');

		// Sorry, guests can't go any further than this..
		if ($user_info['is_guest'] || $user_info['id'] == 0)
			obExit(false);

		$reservedVars = array(
			'actual_theme_url',
			'actual_images_url',
			'base_theme_dir',
			'base_theme_url',
			'default_images_url',
			'default_theme_dir',
			'default_theme_url',
			'default_template',
			'images_url',
			'number_recent_posts',
			'smiley_sets_default',
			'theme_dir',
			'theme_id',
			'theme_layers',
			'theme_templates',
			'theme_url',
			'name',
		);

		// Can't change reserved vars.
		if (in_array(strtolower($_GET['var']), $reservedVars))
			redirectexit($settings['images_url'] . '/blank.png');

		// Use a specific theme?
		if (isset($_GET['th']) || isset($_GET['id']))
		{
			// Invalidate the current themes cache too.
			if (!empty($modSettings['cache_enable']) && $modSettings['cache_enable'] >= 2)
				cache_put_data('theme_settings-' . $settings['theme_id'] . ':' . $user_info['id'], null, 60);

			$settings['theme_id'] = isset($_GET['th']) ? (int) $_GET['th'] : (int) $_GET['id'];
		}

		// If this is the admin preferences the passed value will just be an element of it.
		if ($_GET['var'] == 'admin_preferences')
		{
			$options['admin_preferences'] = !empty($options['admin_preferences']) ? unserialize($options['admin_preferences']) : array();

			// New thingy...
			if (isset($_GET['admin_key']) && strlen($_GET['admin_key']) < 5)
				$options['admin_preferences'][$_GET['admin_key']] = $_GET['val'];

			// Change the value to be something nice,
			$_GET['val'] = serialize($options['admin_preferences']);
		}
		// If this is the window min/max settings, the passed window name will just be an element of it.
		elseif ($_GET['var'] == 'minmax_preferences')
		{
			$options['minmax_preferences'] = !empty($options['minmax_preferences']) ? unserialize($options['minmax_preferences']) : array();

			// New value for them
			if (isset($_GET['minmax_key']) && strlen($_GET['minmax_key']) < 10)
				$options['minmax_preferences'][$_GET['minmax_key']] = $_GET['val'];

			// Change the value to be something nice,
			$_GET['val'] = serialize($options['minmax_preferences']);
		}

		// Update the option.
		require_once(SUBSDIR . '/Themes.subs.php');
		updateThemeOptions(array($settings['theme_id'], $user_info['id'], $_GET['var'], is_array($_GET['val']) ? implode(',', $_GET['val']) : $_GET['val']));

		if (!empty($modSettings['cache_enable']) && $modSettings['cache_enable'] >= 2)
			cache_put_data('theme_settings-' . $settings['theme_id'] . ':' . $user_info['id'], null, 60);

		// Don't output anything...
		redirectexit($settings['images_url'] . '/blank.png');
	}

	/**
	 * Allows choosing, browsing, and editing a themes files.
	 *
	 * What it does:
	 * - Its subactions handle several features:
	 *   - edit_template: display and edit a PHP template file
	 *   - edit_style: display and edit a CSS file
	 *   - edit_file: display and edit other files in the theme
	 * - accessed via ?action=admin;area=theme;sa=edit
	 *
	 * @uses the ManageThemes template
	 */
	public function action_edit()
	{
		global $context;

		loadTemplate('ManageThemes');

		// We'll work hard with them themes!
		require_once(SUBSDIR . '/Themes.subs.php');

		$selectedTheme = isset($_GET['th']) ? (int) $_GET['th'] : (isset($_GET['id']) ? (int) $_GET['id'] : 0);

		// Unfortunately we cannot edit an unkwown theme.. redirect.
		if (empty($selectedTheme))
			redirectexit('action=admin;area=theme;sa=themelist');

		// You're browsing around, aren't you
		elseif (!isset($_REQUEST['filename']))
			redirectexit('action=admin;area=theme;sa=browse;th=' . $selectedTheme);

		// We don't have errors. Yet.
		$context['session_error'] = false;

		// We're editing a theme file.
		// Get the directory of the theme we are editing.
		$context['theme_id'] = $selectedTheme;
		$theme_dir = themeDirectory($context['theme_id']);

		$this->prepareThemeEditContext($theme_dir);

		// Saving?
		if (isset($_POST['save']))
		{
			$this->_action_edit_submit();

			// Now lets get out of here!
			return;
		}

		// We're editing .css, .template.php, .{language}.php or others.
		// Note: we're here sending $theme_dir as parameter to action_()
		// controller functions, which isn't cool. To be refactored.
		if (substr($_REQUEST['filename'], -4) == '.css')
			$this->_action_edit_style($theme_dir);
		elseif (substr($_REQUEST['filename'], -13) == '.template.php')
			$this->_action_edit_template($theme_dir);
		else
			$this->_action_edit_file($theme_dir);

		// Create a special token to allow editing of multiple files.
		createToken('admin-te-' . md5($selectedTheme . '-' . $_REQUEST['filename']));
	}

	/**
	 * Displays for edition in admin panel a css file.
	 *
	 * This function is forwarded to, from
	 * ?action=admin;area=theme;sa=edit
	 *
	 * @param string $theme_dir absolute path of the selected theme directory
	 */
	private function _action_edit_style($theme_dir)
	{
		global $context, $settings;

		addJavascriptVar(array(
			'previewData' => '',
			'previewTimeout' => '',
			'refreshPreviewCache' => '',
			'editFilename' => $context['edit_filename'],
			'theme_id' => $settings['theme_id'],
		), true);

		// pick the template and send it the file
		$context['sub_template'] = 'edit_style';
		$context['entire_file'] = htmlspecialchars(strtr(file_get_contents($theme_dir . '/' . $_REQUEST['filename']), array("\t" => '   ')), ENT_COMPAT, 'UTF-8');
	}

	/**
	 * Displays for editing in the admin panel a template file.
	 *
	 * This function is forwarded to, from
	 * ?action=admin;area=theme;sa=edit
	 *
	 * @param string $theme_dir absolute path of the selected theme directory
	 */
	private function _action_edit_template($theme_dir)
	{
		global $context;

		// Make sure the sub-template is set
		$context['sub_template'] = 'edit_template';

		// Retrieve the contents of the file
		$file_data = file($theme_dir . '/' . $_REQUEST['filename']);

		// For a PHP template file, we display each function in separate boxes.
		$j = 0;
		$context['file_parts'] = array(array('lines' => 0, 'line' => 1, 'data' => '', 'function' => ''));
		for ($i = 0, $n = count($file_data); $i < $n; $i++)
		{
			// @todo refactor this so the docblocks are in the function content window
			if (substr($file_data[$i], 0, 9) === 'function ')
			{
				// Try to format the functions a little nicer...
				$context['file_parts'][$j]['data'] = trim($context['file_parts'][$j]['data']);

				if (empty($context['file_parts'][$j]['lines']))
					unset($context['file_parts'][$j]);

				// Start a new function block
				$context['file_parts'][++$j] = array('lines' => 0, 'line' => $i, 'data' => '');
			}

			$context['file_parts'][$j]['lines']++;
			$context['file_parts'][$j]['data'] .= htmlspecialchars(strtr($file_data[$i], array("\t" => '   ')), ENT_COMPAT, 'UTF-8');
		}

		$context['entire_file'] = htmlspecialchars(strtr(implode('', $file_data), array("\t" => '   ')), ENT_COMPAT, 'UTF-8');
	}

	/**
	 * Handles editing in admin of other types of files from a theme,
	 * except templates and css.
	 *
	 * This function is forwarded to, from
	 * ?action=admin;area=theme;sa=edit
	 *
	 * @param string $theme_dir absolute path of the selected theme directory
	 */
	private function _action_edit_file($theme_dir)
	{
		global $context;

		// Simply set the template and the file contents.
		$context['sub_template'] = 'edit_file';
		$context['entire_file'] = htmlspecialchars(strtr(file_get_contents($theme_dir . '/' . $_REQUEST['filename']), array("\t" => '   ')), ENT_COMPAT, 'UTF-8');
	}

	/**
	 * This function handles submission of a template file.
	 * It checks the file for syntax errors, and if it passes, it saves it.
	 *
	 * This function is forwarded to, from
	 …