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<?php
/**
* @package Joomla.Libraries
* @subpackage Form
*
* @copyright Copyright (C) 2005 - 2015 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('JPATH_PLATFORM') or die;
JFormHelper::loadFieldClass('list');
/**
* Form Field class for the Joomla Framework.
*
* @since 3.1
*/
class JFormFieldTag extends JFormFieldList
{
/**
* A flexible tag list that respects access controls
*
* @var string
* @since 3.1
*/
public $type = 'Tag';
/**
* Flag to work with nested tag field
*
* @var boolean
* @since 3.1
*/
public $isNested = null;
/**
* com_tags parameters
*
* @var \Joomla\Registry\Registry
* @since 3.1
*/
protected $comParams = null;
/**
* Constructor
*
* @since 3.1
*/
public function __construct()
{
parent::__construct();
// Load com_tags config
$this->comParams = JComponentHelper::getParams('com_tags');
}
/**
* Method to get the field input for a tag field.
*
* @return string The field input.
*
* @since 3.1
*/
protected function getInput()
{
// AJAX mode requires ajax-chosen
if (!$this->isNested())
{
// Get the field id
$id = isset($this->element['id']) ? $this->element['id'] : null;
$cssId = '#' . $this->getId($id, $this->element['name']);
// Load the ajax-chosen customised field
JHtml::_('tag.ajaxfield', $cssId, $this->allowCustom());
}
if (!is_array($this->value) && !empty($this->value))
{
if ($this->value instanceof JHelperTags)
{
if (empty($this->value->tags))
{
$this->value = array();
}
else
{
$this->value = $this->value->tags;
}
}
// String in format 2,5,4
if (is_string($this->value))
{
$this->value = explode(',', $this->value);
}
}
$input = parent::getInput();
return $input;
}
/**
* Method to get a list of tags
*
* @return array The field option objects.
*
* @since 3.1
*/
protected function getOptions()
{
$published = $this->element['published']? $this->element['published'] : array(0,1);
$db = JFactory::getDbo();
$query = $db->getQuery(true)
->select('DISTINCT a.id AS value, a.path, a.title AS text, a.level, a.published, a.lft')
->from('#__tags AS a')
->join('LEFT', $db->qn('#__tags') . ' AS b ON a.lft > b.lft AND a.rgt < b.rgt');
// Filter language
if (!empty($this->element['language']))
{
$query->where('a.language = ' . $db->q($this->element['language']));
}
$query->where($db->qn('a.lft') . ' > 0');
// Filter on the published state
if (is_numeric($published))
{
$query->where('a.published = ' . (int) $published);
}
elseif (is_array($published))
{
JArrayHelper::toInteger($published);
$query->where('a.published IN (' . implode(',', $published) . ')');
}
$query->order('a.lft ASC');
// Get the options.
$db->setQuery($query);
try
{
$options = $db->loadObjectList();
}
catch (RuntimeException $e)
{
return false;
}
// Block the possibility to set a tag as it own parent
if ($this->form->getName() == 'com_tags.tag')
{
$id = (int) $this->form->getValue('id', 0);
foreach ($options as $option)
{
if ($option->value == $id)
{
$option->disable = true;
}
}
}
// Merge any additional options in the XML definition.
$options = array_merge(parent::getOptions(), $options);
// Prepare nested data
if ($this->isNested())
{
$this->prepareOptionsNested($options);
}
else
{
$options = JHelperTags::convertPathsToNames($options);
}
return $options;
}
/**
* Add "-" before nested tags, depending on level
*
* @param array &$options Array of tags
*
* @return array The field option objects.
*
* @since 3.1
*/
protected function prepareOptionsNested(&$options)
{
if ($options)
{
foreach ($options as &$option)
{
$repeat = (isset($option->level) && $option->level - 1 >= 0) ? $option->level - 1 : 0;
$option->text = str_repeat('- ', $repeat) . $option->text;
}
}
return $options;
}
/**
* Determine if the field has to be tagnested
*
* @return boolean
*
* @since 3.1
*/
public function isNested()
{
if (is_null($this->isNested))
{
// If mode="nested" || ( mode not set & config = nested )
if ((isset($this->element['mode']) && $this->element['mode'] == 'nested')
|| (!isset($this->element['mode']) && $this->comParams->get('tag_field_ajax_mode', 1) == 0))
{
$this->isNested = true;
}
}
return $this->isNested;
}
/**
* Determines if the field allows or denies custom values
*
* @return boolean
*/
public function allowCustom()
{
if (isset($this->element['custom']) && $this->element['custom'] == 'deny')
{
return false;
}
return true;
}
}