<?php

/**
 * ArtLayout for Contao
 *
 * Copyright (c) 2016 Benjamin Roth
 *
 * @link    http://www.esales-media.de
 * @license commercial
 */


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

	// Config
	'config' => array
	(
		'dataContainer'             => 'Table',
		'ptable'                    => 'tl_theme',
		'switchToEdit'              => true,
		'onload_callback' => array
		(
			array('tl_article_layouts', 'checkPermission'),
		),
		'enableVersioning'          => true,
		'sql' => array
		(
			'keys' => array
			(
				'id' => 'primary'
			)
		)
	),

	// List
	'list' => array
	(
		'sorting' => array
		(
			'mode'                    => 4,
			'flag'                    => 11,
			'fields'                  => array('sorting'),
			'panelLayout'             => 'filter;search,limit',
			'headerFields'            => array('name', 'author', 'tstamp'),
			'child_record_callback'   => array('tl_article_layouts', 'listLayout'),
			'disableGrouping'         => true
		),
		'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_article_layouts']['edit'],
				'href'                  => 'table=tl_article_layouts&amp;act=edit',
				'icon'                  => 'edit.gif'
			),
			'copy' => array
			(
				'label'                 => &$GLOBALS['TL_LANG']['tl_article_layouts']['copy'],
				'href'                  => 'act=paste&amp;mode=copy',
				'icon'                  => 'copy.gif'
			),
			'cut' => array
			(
				'label'                 => &$GLOBALS['TL_LANG']['tl_article_layouts']['cut'],
				'href'                  => 'act=paste&amp;mode=cut',
				'icon'                  => 'cut.gif',
				'attributes'            => 'onclick="Backend.getScrollOffset()"'
			),
			'delete' => array
			(
				'label'                 => &$GLOBALS['TL_LANG']['tl_article_layouts']['delete'],
				'href'                  => 'act=delete',
				'icon'                  => 'delete.gif',
				'attributes'            => 'onclick="if(!confirm(\'' . $GLOBALS['TL_LANG']['MSC']['deleteConfirm'] . '\'))return false;Backend.getScrollOffset()"'
			),
			'show' => array
			(
				'label'                 => &$GLOBALS['TL_LANG']['tl_article_layouts']['show'],
				'href'                  => 'act=show',
				'icon'                  => 'show.gif'
			)
		)
	),

	// Palettes
	'palettes' => array
	(
		'__selector__'              => array('showBackgroundImage','restrictContentElements'),
		'default'                   => '{title_legend},title,alias;{content_legend},maxWidth,center,useHelper;{image_legend},showBackgroundImage;{expert_legend:hide},restrictContentElements,isDefault'
	),

	// Subpalettes
	'subpalettes' => array
	(
		'showBackgroundImage'       => 'bgImageSize,bgStyle',
		'restrictContentElements'   => 'allowedElements'
	),

	// Fields
	'fields' => array
	(
		'id' => array
		(
			'sql'                     => "int(10) unsigned NOT NULL auto_increment"
		),
		'pid' => array
		(
			'foreignKey'              => 'tl_theme.name',
			'sql'                     => "int(10) unsigned NOT NULL default '0'",
			'relation'                => array('type'=>'belongsTo', 'load'=>'lazy')
		),
		'sorting' => array
		(
			'sql'                     => "int(10) unsigned NOT NULL default '0'"
		),
		'tstamp' => array
		(
			'sql'                     => "int(10) unsigned NOT NULL default '0'"
		),
		'title' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_article_layouts']['title'],
			'inputType'               => 'text',
			'exclude'                 => true,
			'search'                  => true,
			'eval'                    => array('mandatory'=>true, 'rgxp'=>'extnd', 'maxlength'=>64, 'tl_class'=>'w50'),
			'sql'                     => "varchar(64) NULL"
		),
		'alias' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_article_layouts']['alias'],
			'exclude'                 => true,
			'inputType'               => 'text',
			'search'                  => true,
			'eval'                    => array('rgxp'=>'alias', 'doNotCopy'=>true, 'maxlength'=>128, 'tl_class'=>'w50'),
			'save_callback' => array
			(
				array('tl_article_layouts', 'generateAlias')
			),
			'sql'                     => "varchar(128) COLLATE utf8_bin NOT NULL default ''"
		),
		'showBackgroundImage' => array
		(
			'exclude'                 => true,
			'label'                   => &$GLOBALS['TL_LANG']['tl_article_layouts']['showBackgroundImage'],
			'inputType'               => 'checkbox',
			'eval'                    => array('tl_class'=>'w50 m12','submitOnChange'=>true),
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'bgImageSize' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_article_layouts']['bgImageSize'],
			'exclude'                 => true,
			'inputType'               => 'imageSize',
			'options'                 => System::getImageSizes(),
			'reference'               => &$GLOBALS['TL_LANG']['MSC'],
			'eval'                    => array('rgxp'=>'natural', 'includeBlankOption'=>true, 'nospace'=>true, 'helpwizard'=>true, 'tl_class'=>'w50'),
			'sql'                     => "varchar(64) NOT NULL default ''"
		),
		'center' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_article_layouts']['center'],
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'eval'                    => array('tl_class'=>'w50 m12'),
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'maxWidth' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_article_layouts']['maxWidth'],
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'eval'                    => array('tl_class'=>'w50 m12'),
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'useHelper' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_article_layouts']['useHelper'],
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'eval'                    => array('tl_class'=>'w50 m12'),
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'bgStyle' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_article_layouts']['bgStyle'],
			'exclude'                 => true,
			'inputType'               => 'text',
			'eval'                    => array('tl_class'=>'long','maxlength'=>1055,'decodeEntities'=>true),
			'sql'                     => "text NULL"
		),
		'restrictContentElements' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_article_layouts']['restrictContentElements'],
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'eval'                    => array('submitOnChange'=>true),
			'sql'                     => "char(1) NOT NULL default ''"
		),
		'allowedElements' => array
		(
			'label'                   => &$GLOBALS['TL_LANG']['tl_article_layouts']['allowedElements'],
			'exclude'                 => true,
			'inputType'               => 'checkbox',
			'options_callback'        => array('tl_article_layouts','getContentElements'),
			'reference'               => &$GLOBALS['TL_LANG']['CTE'],
			'eval'                    => array('multiple'=>true,'mandatory'=>true),
			'sql'                     => "blob NULL"
		),
    'isDefault' => array
    (
      'label'                   => &$GLOBALS['TL_LANG']['tl_article_layouts']['isDefault'],
      'exclude'                 => true,
      'inputType'               => 'checkbox',
      'eval'                    => array('doNotCopy'=>true, 'tl_class'=>'clr'),
      'save_callback' => array
      (
        array('tl_article_layouts', 'checkDefault')
      ),
      'sql'                     => "char(1) NOT NULL default ''"
    ),
	)
);


/**
 * Provide miscellaneous methods that are used by the data configuration array.
 *
 * @author Benjamin Roth <http://www.esales-media.de>
 */
class tl_article_layouts extends \Backend
{

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


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

		if (!$this->User->hasAccess('artLayout', 'themes'))
		{
			$this->log('Not enough permissions to access the article layouts module', __METHOD__, TL_ERROR);
			$this->redirect('contao/main.php?act=error');
		}
	}

	/**
	 * Auto-generate an article layout alias if it has not been set yet
	 *
	 * @param mixed         $varValue
	 * @param DataContainer $dc
	 *
	 * @return string
	 *
	 * @throws Exception
	 */
	public function generateAlias($varValue, \DataContainer $dc)
	{
		$autoAlias = false;

		// Generate an alias if there is none
		if ($varValue == '')
		{
			$autoAlias = true;
			$varValue = StringUtil::generateAlias($dc->activeRecord->title);
		}


		$objAlias = $this->Database->prepare("SELECT id FROM tl_article_layouts WHERE pid = ? AND (id=? OR alias=?)")
			->execute($dc->activeRecord->pid,$dc->id, $varValue);

		// Check whether the page alias exists
		if ($objAlias->numRows > 1)
		{
			if (!$autoAlias)
			{
				throw new Exception(sprintf($GLOBALS['TL_LANG']['ERR']['aliasExists'], $varValue));
			}

			$varValue .= '-' . $dc->id;
		}

		return $varValue;
	}

	/**
	 * List an article layout
	 *
	 * @param array $row
	 *
	 * @return string
	 */
	public function listLayout($row)
	{
		return '<div style="float:left;'.($row['isDefault'] ? 'font-weight: bold; font-style: italic;' : '').'">'. $row['title'] .' <span style="color:#b3b3b3;">['.$row['alias']."]</span></div>\n";
	}

	/**
	 * Return all content elements as array
	 *
	 * @return array
	 */
	public function getContentElements()
	{
		$groups = array();

		foreach ($GLOBALS['TL_CTE'] as $k=>$v)
		{
			foreach (array_keys($v) as $kk)
			{
				$groups[$k][] = $kk;
			}
		}

		return $groups;
	}

  /**
   * Make sure there is only one default per pid
   *
   * @param mixed         $varValue
   * @param DataContainer $dc
   *
   * @return mixed
   *
   * @throws Exception
   */
  public function checkDefault($varValue, DataContainer $dc)
  {
    if ($varValue == '')
    {
      return '';
    }

    $objPage = $this->Database->prepare("SELECT id FROM tl_article_layouts WHERE `isDefault`=1 AND pid=? AND id!=?")
      ->execute($dc->activeRecord->pid, $dc->activeRecord->id);

    if ($objPage->numRows)
    {
      throw new Exception($GLOBALS['TL_LANG']['ERR']['multipleArticleLayoutDefaults']);
    }

    return $varValue;
  }

}