<?php

/**
 * Contao Open Source CMS
 *
 * Copyright (c) 2005-2016 Leo Feyer
 *
 * @license LGPL-3.0+
 */


/**
 * Table tl_user
 */
$GLOBALS['TL_DCA']['tl_user'] = array
(

	// Config
	'config' => array
	(
		'dataContainer'               => 'Table',
		'enableVersioning'            => true,
		'onload_callback' => array
		(
			array('tl_user', 'checkPermission')
		),
		'onsubmit_callback' => array
		(
			array('tl_user', 'storeDateAdded'),
			array('tl_user', 'checkRemoveSession')
		),
		'ondelete_callback' => array
		(
			array('tl_user', 'removeSession')
		),
		'sql' => array
		(
			'keys' => array
			(
				'id' => 'primary',
				'username' => 'unique',
				'email' => 'index'
			)
		)
	),

	// List
	'list' => array
	(
		'sorting' => array
		(
			'mode'                    => 2,
			'fields'                  => array('dateAdded DESC'),
			'flag'                    => 1,
			'panelLayout'             => 'filter;sort,search,limit'
		),
		'label' => array
		(
			'fields'                  => array('icon', 'name', 'username', 'dateAdded'),
			'showColumns'             => true,
			'label_callback'          => array('tl_user', 'addIcon')
		),
		'global_operations' => array
		(
			'all' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['MSC']['all'],
				'href'                => 'act=select',
				'class'               => 'header_edit_all',
				'attributes'          => 'onclick="Backend.getScrollOffset()" accesskey="e"'
			)
		),
		'operations' => array
		(
			'edit' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['tl_user']['edit'],
				'href'                => 'act=edit',
				'icon'                => 'edit.gif',
				'button_callback'     => array('tl_user', 'editUser')
			),
			'copy' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['tl_user']['copy'],
				'href'                => 'act=copy',
				'icon'                => 'copy.gif',
				'button_callback'     => array('tl_user', 'copyUser')
			),
			'delete' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['tl_user']['delete'],
				'href'                => 'act=delete',
				'icon'                => 'delete.gif',
				'attributes'          => 'onclick="if(!confirm(\'' . $GLOBALS['TL_LANG']['MSC']['deleteConfirm'] . '\'))return false;Backend.getScrollOffset()"',
				'button_callback'     => array('tl_user', 'deleteUser')
			),
			'toggle' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['tl_user']['toggle'],
				'icon'                => 'visible.gif',
				'attributes'          => 'onclick="Backend.getScrollOffset();return AjaxRequest.toggleVisibility(this,%s)"',
				'button_callback'     => array('tl_user', 'toggleIcon')
			),
			'show' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['tl_user']['show'],
				'href'                => 'act=show',
				'icon'                => 'show.gif'
			),
			'su' => array
			(
				'label'               => &$GLOBALS['TL_LANG']['tl_user']['su'],
				'href'                => 'key=su',
				'icon'                => 'su.gif',
				'button_callback'     => array('tl_user', 'switchUser')
			)
		)
	),

	// Palettes
	'palettes' => array
	(
		'__selector__'                => array('inherit', 'admin'),
		'login'                       => '{name_legend},name,email;{backend_legend},language,uploader,showHelp,thumbnails,useRTE,useCE;{session_legend},session;{theme_legend:hide},backendTheme;{password_legend},password',
		'admin'                       => '{name_legend},username,name,email;{backend_legend:hide},language,uploader,showHelp,thumbnails,useRTE,useCE;{theme_legend:hide},backendTheme;{password_legend:hide},pwChange,password;{admin_legend},admin;{account_legend},disable,start,stop',
		'default'                     => '{name_legend},username,name,email;{backend_legend:hide},language,uploader,showHelp,thumbnails,useRTE,useCE;{theme_legend:hide},backendTheme;{password_legend:hide},pwChange,password;{admin_legend},admin;{groups_legend},groups,inherit;{account_legend},disable,start,stop',
		'group'                       => '{name_legend},username,name,email;{backend_legend:hide},language,uploader,showHelp,thumbnails,useRTE,useCE;{theme_legend:hide},backendTheme;{password_legend:hide},pwChange,password;{admin_legend},admin;{groups_legend},groups,inherit;{account_legend},disable,start,stop',
		'extend'                      => '{name_legend},username,name,email;{backend_legend:hide},language,uploader,showHelp,thumbnails,useRTE,useCE;{theme_legend:hide},backendTheme;{password_legend:hide},pwChange,password;{admin_legend},admin;{groups_legend},groups,inherit;{modules_legend},modules,themes;{pagemounts_legend},pagemounts,alpty;{filemounts_legend},filemounts,fop;{forms_legend},forms,formp;{account_legend},disable,start,stop',
		'custom'                      => '{name_legend},username,name,email;{backend_legend:hide},language,uploader,showHelp,thumbnails,useRTE,useCE;{theme_legend:hide},backendTheme;{password_legend:hide},pwChange,password;{admin_legend},admin;{groups_legend},groups,inherit;{modules_legend},modules,themes;{pagemounts_legend},pagemounts,alpty;{filemounts_legend},filemounts,fop;{forms_legend},forms,formp;{account_legend},disable,start,stop'
	),

	// Fields
	'fields' => array
	(
		'id' => array
		(
			'sql'                     => "int(10) unsigned NOT NULL auto_increment"
		),
		'tstamp' => array
		(
			'sql'                     => "int(10) unsigned NOT NULL default '0'"
		),
		'username' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['username'],
			'exclude'                 => true,
			'search'                  => true,
			'sorting'                 => true,
			'flag'                    => 1,
			'inputType'               => 'text',
			'eval'                    => array('mandatory'=>true, 'rgxp'=>'extnd', 'nospace'=>true, 'unique'=>true, 'maxlength'=>64),
			'sql'                     => "varchar(64) COLLATE utf8_bin NULL"
		),
		'name' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['name'],
			'exclude'                 => true,
			'search'                  => true,
			'sorting'                 => true,
			'flag'                    => 1,
			'inputType'               => 'text',
			'eval'                    => array('mandatory'=>true, 'maxlength'=>255, 'tl_class'=>'w50'),
			'sql'                     => "varchar(255) NOT NULL default ''"
		),
		'email' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['email'],
			'exclude'                 => true,
			'search'                  => true,
			'inputType'               => 'text',
			'eval'                    => array('mandatory'=>true, 'rgxp'=>'email', 'maxlength'=>255, 'unique'=>true, 'decodeEntities'=>true, 'tl_class'=>'w50'),
			'sql'                     => "varchar(255) NOT NULL default ''"
		),
		'language' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['language'],
			'default'                 => str_replace('-', '_', $GLOBALS['TL_LANGUAGE']),
			'exclude'                 => true,
			'filter'                  => true,
			'inputType'               => 'select',
			'options'                 => System::getLanguages(true),
			'eval'                    => array('rgxp'=>'locale', 'tl_class'=>'w50'),
			'sql'                     => "varchar(5) NOT NULL default ''"
		),
		'backendTheme' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['backendTheme'],
			'exclude'                 => true,
			'inputType'               => 'select',
			'options'                 => Backend::getThemes(),
			'sql'                     => "varchar(32) NOT NULL default ''"
		),
		'uploader' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['uploader'],
			'exclude'                 => true,
			'inputType'               => 'select',
			'options'                 => array('DropZone', 'FileUpload'),
			'reference'               => &$GLOBALS['TL_LANG']['tl_user'],
			'eval'                    => array('tl_class'=>'w50'),
			'sql'                     => "varchar(32) NOT NULL default ''"
		),
		'showHelp' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['showHelp'],
			'default'                 => 1,
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'eval'                    => array('tl_class'=>'w50'),
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'thumbnails' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['thumbnails'],
			'default'                 => 1,
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'eval'                    => array('tl_class'=>'w50'),
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'useRTE' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['useRTE'],
			'default'                 => 1,
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'eval'                    => array('tl_class'=>'w50'),
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'useCE' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['useCE'],
			'default'                 => 1,
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'eval'                    => array('tl_class'=>'w50'),
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'password' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['MSC']['password'],
			'exclude'                 => true,
			'inputType'               => 'password',
			'eval'                    => array('mandatory'=>true, 'preserveTags'=>true, 'minlength'=>Config::get('minPasswordLength')),
			'sql'                     => "varchar(128) NOT NULL default ''"
		),
		'pwChange' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['pwChange'],
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'filter'                  => true,
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'admin' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['admin'],
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'filter'                  => true,
			'eval'                    => array('submitOnChange'=>true),
			'save_callback' => array
			(
				array('tl_user', 'checkAdminStatus')
			),
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'groups' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['groups'],
			'exclude'                 => true,
			'filter'                  => true,
			'inputType'               => 'checkboxWizard',
			'foreignKey'              => 'tl_user_group.name',
			'eval'                    => array('multiple'=>true),
			'sql'                     => "blob NULL",
			'relation'                => array('type'=>'belongsToMany', 'load'=>'lazy')
		),
		'inherit' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['inherit'],
			'exclude'                 => true,
			'default'                 => 'group',
			'inputType'               => 'radio',
			'options'                 => array('group', 'extend', 'custom'),
			'reference'               => &$GLOBALS['TL_LANG']['tl_user'],
			'eval'                    => array('helpwizard'=>true, 'submitOnChange'=>true),
			'sql'                     => "varchar(12) NOT NULL default ''"
		),
		'modules' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['modules'],
			'exclude'                 => true,
			'filter'                  => true,
			'inputType'               => 'checkbox',
			'options_callback'        => array('tl_user', 'getModules'),
			'reference'               => &$GLOBALS['TL_LANG']['MOD'],
			'eval'                    => array('multiple'=>true, 'helpwizard'=>true),
			'sql'                     => "blob NULL"
		),
		'themes' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['themes'],
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'options'                 => array('css', 'modules', 'layout', 'image_sizes', 'theme_import', 'theme_export'),
			'reference'               => &$GLOBALS['TL_LANG']['MOD'],
			'eval'                    => array('multiple'=>true),
			'sql'                     => "blob NULL"
		),
		'pagemounts' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['pagemounts'],
			'exclude'                 => true,
			'inputType'               => 'pageTree',
			'eval'                    => array('multiple'=>true, 'fieldType'=>'checkbox'),
			'sql'                     => "blob NULL"
		),
		'alpty' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['alpty'],
			'default'                 => array('regular', 'redirect', 'forward'),
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'options'                 => array_keys($GLOBALS['TL_PTY']),
			'reference'               => &$GLOBALS['TL_LANG']['PTY'],
			'eval'                    => array('multiple'=>true, 'helpwizard'=>true),
			'sql'                     => "blob NULL"
		),
		'filemounts' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['filemounts'],
			'exclude'                 => true,
			'inputType'               => 'fileTree',
			'eval'                    => array('multiple'=>true, 'fieldType'=>'checkbox'),
			'sql'                     => "blob NULL"
		),
		'fop' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['FOP']['fop'],
			'default'                 => array('f1', 'f2', 'f3'),
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'options'                 => array('f1', 'f2', 'f3', 'f4', 'f5', 'f6'),
			'reference'               => &$GLOBALS['TL_LANG']['FOP'],
			'eval'                    => array('multiple'=>true),
			'sql'                     => "blob NULL"
		),
		'forms' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['forms'],
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'foreignKey'              => 'tl_form.title',
			'eval'                    => array('multiple'=>true),
			'sql'                     => "blob NULL"
		),
		'formp' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['formp'],
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'options'                 => array('create', 'delete'),
			'reference'               => &$GLOBALS['TL_LANG']['MSC'],
			'eval'                    => array('multiple'=>true),
			'sql'                     => "blob NULL"
		),
		'disable' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['disable'],
			'exclude'                 => true,
			'filter'                  => true,
			'flag'                    => 2,
			'inputType'               => 'checkbox',
			'save_callback' => array
			(
				array('tl_user', 'checkAdminDisable')
			),
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'start' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['start'],
			'exclude'                 => true,
			'inputType'               => 'text',
			'eval'                    => array('rgxp'=>'datim', 'datepicker'=>true, 'tl_class'=>'w50 wizard'),
			'sql'                     => "varchar(10) NOT NULL default ''"
		),
		'stop' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['stop'],
			'exclude'                 => true,
			'inputType'               => 'text',
			'eval'                    => array('rgxp'=>'datim', 'datepicker'=>true, 'tl_class'=>'w50 wizard'),
			'sql'                     => "varchar(10) NOT NULL default ''"
		),
		'session' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_user']['session'],
			'exclude'                 => true,
			'input_field_callback'    => array('tl_user', 'sessionField'),
			'eval'                    => array('doNotShow'=>true, 'doNotCopy'=>true),
			'sql'                     => "blob NULL"
		),
		'dateAdded' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['MSC']['dateAdded'],
			'default'                 => time(),
			'sorting'                 => true,
			'flag'                    => 6,
			'eval'                    => array('rgxp'=>'datim', 'doNotCopy'=>true),
			'sql'                     => "int(10) unsigned NOT NULL default '0'"
		),
		'lastLogin' => array
		(
			'eval'                    => array('rgxp'=>'datim', 'doNotShow'=>true, 'doNotCopy'=>true),
			'sql'                     => "int(10) unsigned NOT NULL default '0'"
		),
		'currentLogin' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['MSC']['lastLogin'],
			'sorting'                 => true,
			'flag'                    => 6,
			'eval'                    => array('rgxp'=>'datim', 'doNotCopy'=>true),
			'sql'                     => "int(10) unsigned NOT NULL default '0'"
		),
		'loginCount' => array
		(
			'default'                 => 3,
			'eval'                    => array('doNotCopy'=>true),
			'sql'                     => "smallint(5) unsigned NOT NULL default '3'"
		),
		'locked' => array
		(
			'eval'                    => array('rgxp'=>'datim', 'doNotCopy'=>true),
			'sql'                     => "int(10) unsigned NOT NULL default '0'"
		)
	)
);


/**
 * Provide miscellaneous methods that are used by the data configuration array.
 *
 * @author Leo Feyer <https://github.com/leofeyer>
 */
class tl_user extends Backend
{

	/**
	 * Import the back end user object
	 */
	public function __construct()
	{
		parent::__construct();
		$this->import('BackendUser', 'User');
	}


	/**
	 * Check permissions to edit table tl_user
	 */
	public function checkPermission()
	{
		if ($this->User->isAdmin)
		{
			return;
		}

		// Check current action
		switch (Input::get('act'))
		{
			case 'create':
			case 'select':
			case 'show':
				// Allow
				break;

			case 'delete':
				if (Input::get('id') == $this->User->id)
				{
					$this->log('Attempt to delete own account ID "'.Input::get('id').'"', __METHOD__, TL_ERROR);
					$this->redirect('contao/main.php?act=error');
				}
				// no break;

			case 'edit':
			case 'copy':
			case 'toggle':
			default:
				$objUser = $this->Database->prepare("SELECT admin FROM tl_user WHERE id=?")
										  ->limit(1)
										  ->execute(Input::get('id'));

				if ($objUser->admin && Input::get('act') != '')
				{
					$this->log('Not enough permissions to '.Input::get('act').' administrator account ID "'.Input::get('id').'"', __METHOD__, TL_ERROR);
					$this->redirect('contao/main.php?act=error');
				}
				break;

			case 'editAll':
			case 'deleteAll':
			case 'overrideAll':
				$session = $this->Session->getData();
				$objUser = $this->Database->execute("SELECT id FROM tl_user WHERE admin=1");
				$session['CURRENT']['IDS'] = array_diff($session['CURRENT']['IDS'], $objUser->fetchEach('id'));
				$this->Session->setData($session);
				break;
		}
	}


	/**
	 * Add an image to each record
	 *
	 * @param array         $row
	 * @param string        $label
	 * @param DataContainer $dc
	 * @param array         $args
	 *
	 * @return string
	 */
	public function addIcon($row, $label, DataContainer $dc, $args)
	{
		$image = $row['admin'] ? 'admin' :  'user';
		$time = \Date::floorToMinute();

		$disabled = $row['start'] !== '' && $row['start'] > $time || $row['stop'] !== '' && $row['stop'] < $time;

		if ($row['disable'] || $disabled)
		{
			$image .= '_';
		}

		$args[0] = sprintf('<div class="list_icon_new" style="background-image:url(\'%ssystem/themes/%s/images/%s.gif\')" data-icon="%s.gif" data-icon-disabled="%s.gif">&nbsp;</div>', TL_ASSETS_URL, Backend::getTheme(), $image, $disabled ? $image : rtrim($image, '_'), rtrim($image, '_') . '_');

		return $args;
	}


	/**
	 * Return the edit user button
	 *
	 * @param array  $row
	 * @param string $href
	 * @param string $label
	 * @param string $title
	 * @param string $icon
	 * @param string $attributes
	 *
	 * @return string
	 */
	public function editUser($row, $href, $label, $title, $icon, $attributes)
	{
		return ($this->User->isAdmin || !$row['admin']) ? '<a href="'.$this->addToUrl($href.'&amp;id='.$row['id']).'" title="'.specialchars($title).'"'.$attributes.'>'.Image::getHtml($icon, $label).'</a> ' : Image::getHtml(preg_replace('/\.gif$/i', '_.gif', $icon)).' ';
	}


	/**
	 * Return the copy page button
	 *
	 * @param array  $row
	 * @param string $href
	 * @param string $label
	 * @param string $title
	 * @param string $icon
	 * @param string $attributes
	 * @param string $table
	 *
	 * @return string
	 */
	public function copyUser($row, $href, $label, $title, $icon, $attributes, $table)
	{
		if ($GLOBALS['TL_DCA'][$table]['config']['closed'])
		{
			return '';
		}

		return ($this->User->isAdmin || !$row['admin']) ? '<a href="'.$this->addToUrl($href.'&amp;id='.$row['id']).'" title="'.specialchars($title).'"'.$attributes.'>'.Image::getHtml($icon, $label).'</a> ' : Image::getHtml(preg_replace('/\.gif$/i', '_.gif', $icon)).' ';
	}


	/**
	 * Return the delete page button
	 *
	 * @param array  $row
	 * @param string $href
	 * @param string $label
	 * @param string $title
	 * @param string $icon
	 * @param string $attributes
	 *
	 * @return string
	 */
	public function deleteUser($row, $href, $label, $title, $icon, $attributes)
	{
		return ($this->User->isAdmin || !$row['admin']) ? '<a href="'.$this->addToUrl($href.'&amp;id='.$row['id']).'" title="'.specialchars($title).'"'.$attributes.'>'.Image::getHtml($icon, $label).'</a> ' : Image::getHtml(preg_replace('/\.gif$/i', '_.gif', $icon)).' ';
	}


	/**
	 * Generate a "switch account" button and return it as string
	 *
	 * @param array  $row
	 * @param string $href
	 * @param string $label
	 * @param string $title
	 * @param string $icon
	 *
	 * @return string
	 *
	 * @throws Exception
	 */
	public function switchUser($row, $href, $label, $title, $icon)
	{
		if (!$this->User->isAdmin)
		{
			return '';
		}

		if (Input::get('key') == 'su' && Input::get('id'))
		{
			$objUser = $this->Database->prepare("SELECT id, username FROM tl_user WHERE id=?")
									  ->execute(Input::get('id'));

			if (!$objUser->numRows)
			{
				throw new Exception('Invalid user ID ' . Input::get('id'));
			}

			$this->Database->prepare("UPDATE tl_session SET pid=?, su=1 WHERE hash=?")
						   ->execute($objUser->id, sha1(session_id() . (!\Config::get('disableIpCheck') ? \Environment::get('ip') : '') . 'BE_USER_AUTH'));

			$this->log('User "' . $this->User->username . '" has switched to user "' . $objUser->username . '"', __METHOD__, TL_ACCESS);

			$this->redirect('contao/main.php');
		}

		return '<a href="'.$this->addToUrl($href.'&amp;id='.$row['id']).'" title="'.specialchars($title).'">'.Image::getHtml($icon, $label).'</a> ';
	}


	/**
	 * Return a checkbox to delete session data
	 *
	 * @param DataContainer $dc
	 *
	 * @return string
	 */
	public function sessionField(DataContainer $dc)
	{
		if (Input::post('FORM_SUBMIT') == 'tl_user')
		{
			$arrPurge = Input::post('purge');

			if (is_array($arrPurge))
			{
				$this->import('Automator');

				if (in_array('purge_session', $arrPurge))
				{
					$this->Session->setData(array());
					Message::addConfirmation($GLOBALS['TL_LANG']['tl_user']['sessionPurged']);
				}

				if (in_array('purge_images', $arrPurge))
				{
					$this->Automator->purgeImageCache();
					Message::addConfirmation($GLOBALS['TL_LANG']['tl_user']['htmlPurged']);
				}

				if (in_array('purge_pages', $arrPurge))
				{
					$this->Automator->purgePageCache();
					Message::addConfirmation($GLOBALS['TL_LANG']['tl_user']['tempPurged']);
				}
			}
		}

		return '
<div>
  <fieldset class="tl_checkbox_container">
    <legend>'.$GLOBALS['TL_LANG']['tl_user']['session'][0].'</legend>
    <input type="checkbox" id="check_all_purge" class="tl_checkbox" onclick="Backend.toggleCheckboxGroup(this, \'ctrl_purge\')"> <label for="check_all_purge" style="color:#a6a6a6"><em>'.$GLOBALS['TL_LANG']['MSC']['selectAll'].'</em></label><br>
    <input type="checkbox" name="purge[]" id="opt_purge_0" class="tl_checkbox" value="purge_session" onfocus="Backend.getScrollOffset()"> <label for="opt_purge_0">'.$GLOBALS['TL_LANG']['tl_user']['sessionLabel'].'</label><br>
    <input type="checkbox" name="purge[]" id="opt_purge_1" class="tl_checkbox" value="purge_images" onfocus="Backend.getScrollOffset()"> <label for="opt_purge_1">'.$GLOBALS['TL_LANG']['tl_user']['htmlLabel'].'</label><br>
    <input type="checkbox" name="purge[]" id="opt_purge_2" class="tl_checkbox" value="purge_pages" onfocus="Backend.getScrollOffset()"> <label for="opt_purge_2">'.$GLOBALS['TL_LANG']['tl_user']['tempLabel'].'</label>
  </fieldset>'.$dc->help().'
</div>';
	}


	/**
	 * Return all modules except profile modules
	 *
	 * @return array
	 */
	public function getModules()
	{
		$arrModules = array();

		foreach ($GLOBALS['BE_MOD'] as $k=>$v)
		{
			if (!empty($v))
			{
				unset($v['undo']);
				$arrModules[$k] = array_keys($v);
			}
		}

		return $arrModules;
	}


	/**
	 * Prevent administrators from downgrading their own account
	 *
	 * @param mixed         $varValue
	 * @param DataContainer $dc
	 *
	 * @return mixed
	 */
	public function checkAdminStatus($varValue, DataContainer $dc)
	{
		if ($varValue == '' && $this->User->id == $dc->id)
		{
			$varValue = 1;
		}

		return $varValue;
	}


	/**
	 * Prevent administrators from disabling their own account
	 *
	 * @param mixed         $varValue
	 * @param DataContainer $dc
	 *
	 * @return mixed
	 */
	public function checkAdminDisable($varValue, DataContainer $dc)
	{
		if ($varValue == 1 && $this->User->id == $dc->id)
		{
			$varValue = '';
		}

		return $varValue;
	}


	/**
	 * Store the date when the account has been added
	 *
	 * @param DataContainer $dc
	 */
	public function storeDateAdded(DataContainer $dc)
	{
		// Return if there is no active record (override all)
		if (!$dc->activeRecord || $dc->activeRecord->dateAdded > 0)
		{
			return;
		}

		// Fallback solution for existing accounts
		if ($dc->activeRecord->lastLogin > 0)
		{
			$time = $dc->activeRecord->lastLogin;
		}
		else
		{
			$time = time();
		}

		$this->Database->prepare("UPDATE tl_user SET dateAdded=? WHERE id=?")
					   ->execute($time, $dc->id);
	}


	/**
	 * Check whether the user session should be removed
	 *
	 * @param DataContainer $dc
	 */
	public function checkRemoveSession(DataContainer $dc)
	{
		if ($dc->activeRecord)
		{
			if ($dc->activeRecord->disable || ($dc->activeRecord->start != '' && $dc->activeRecord->start > time()) || ($dc->activeRecord->stop != '' && $dc->activeRecord->stop < time()))
			{
				$this->removeSession($dc);
			}
		}
	}


	/**
	 * Remove the session if a user is deleted (see #5353)
	 *
	 * @param DataContainer $dc
	 */
	public function removeSession(DataContainer $dc)
	{
		if (!$dc->activeRecord)
		{
			return;
		}

		if ($dc->activeRecord->disable || Input::get('act') == 'delete' || Input::get('act') == 'deleteAll')
		{
			$this->Database->prepare("DELETE FROM tl_session WHERE name='BE_USER_AUTH' AND pid=?")
						   ->execute($dc->activeRecord->id);
		}
	}


	/**
	 * Return the "toggle visibility" button
	 *
	 * @param array  $row
	 * @param string $href
	 * @param string $label
	 * @param string $title
	 * @param string $icon
	 * @param string $attributes
	 *
	 * @return string
	 */
	public function toggleIcon($row, $href, $label, $title, $icon, $attributes)
	{
		if (strlen(Input::get('tid')))
		{
			$this->toggleVisibility(Input::get('tid'), (Input::get('state') == 1), (@func_get_arg(12) ?: null));
			$this->redirect($this->getReferer());
		}

		// Check permissions AFTER checking the tid, so hacking attempts are logged
		if (!$this->User->hasAccess('tl_user::disable', 'alexf'))
		{
			return '';
		}

		$href .= '&amp;tid='.$row['id'].'&amp;state='.$row['disable'];

		if ($row['disable'])
		{
			$icon = 'invisible.gif';
		}

		// Protect admin accounts
		if (!$this->User->isAdmin && $row['admin'])
		{
			return Image::getHtml($icon) . ' ';
		}

		return '<a href="'.$this->addToUrl($href).'" title="'.specialchars($title).'"'.$attributes.'>'.Image::getHtml($icon, $label, 'data-state="' . ($row['disable'] ? 0 : 1) . '"').'</a> ';
	}


	/**
	 * Disable/enable a user group
	 *
	 * @param integer       $intId
	 * @param boolean       $blnVisible
	 * @param DataContainer $dc
	 */
	public function toggleVisibility($intId, $blnVisible, DataContainer $dc=null)
	{
		// Set the ID and action
		Input::setGet('id', $intId);
		Input::setGet('act', 'toggle');

		if ($dc)
		{
			$dc->id = $intId; // see #8043
		}

		$this->checkPermission();

		// Protect own account
		if ($this->User->id == $intId)
		{
			return;
		}

		// Check the field access
		if (!$this->User->hasAccess('tl_user::disable', 'alexf'))
		{
			$this->log('Not enough permissions to activate/deactivate user ID "'.$intId.'"', __METHOD__, TL_ERROR);
			$this->redirect('contao/main.php?act=error');
		}

		$objVersions = new Versions('tl_user', $intId);
		$objVersions->initialize();

		// Trigger the save_callback
		if (is_array($GLOBALS['TL_DCA']['tl_user']['fields']['disable']['save_callback']))
		{
			foreach ($GLOBALS['TL_DCA']['tl_user']['fields']['disable']['save_callback'] as $callback)
			{
				if (is_array($callback))
				{
					$this->import($callback[0]);
					$blnVisible = $this->{$callback[0]}->{$callback[1]}($blnVisible, ($dc ?: $this));
				}
				elseif (is_callable($callback))
				{
					$blnVisible = $callback($blnVisible, ($dc ?: $this));
				}
			}
		}

		// Update the database
		$this->Database->prepare("UPDATE tl_user SET tstamp=". time() .", disable='" . ($blnVisible ? '' : 1) . "' WHERE id=?")
					   ->execute($intId);

		$objVersions->create();

		// Remove the session if the user is disabled (see #5353)
		if (!$blnVisible)
		{
			$this->Database->prepare("DELETE FROM tl_session WHERE name='BE_USER_AUTH' AND pid=?")
						   ->execute($intId);
		}
	}
}
