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* @license GNU General Public License version 2 or later; see LICENSE.txt */ namespace Joomla\CMS\Form\Field; \defined('JPATH_PLATFORM') or die; use Joomla\CMS\Component\ComponentHelper; use Joomla\CMS\Factory; use Joomla\CMS\Helper\TagsHelper; use Joomla\CMS\Language\Multilanguage; use Joomla\Database\ParameterType; use Joomla\Utilities\ArrayHelper; /** * List of Tags field. * * @since 3.1 */ class TagField extends ListField { /** * 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; /** * Name of the layout being used to render the field * * @var string * @since 4.0.0 */ protected $layout = 'joomla.form.field.tag'; /** * Constructor * * @since 3.1 */ public function __construct() { parent::__construct(); // Load com_tags config $this->comParams = ComponentHelper::getParams('com_tags'); } /** * Method to get the field input for a tag field. * * @return string The field input. * * @since 3.1 */ protected function getInput() { $data = $this->getLayoutData(); if (!\is_array($this->value) && !empty($this->value)) { if ($this->value instanceof TagsHelper) { 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(',', $this->value); } // Integer is given if (\is_int($this->value)) { $this->value = array($this->value); } $data['value'] = $this->value; } $data['remoteSearch'] = $this->isRemoteSearch(); $data['options'] = $this->getOptions(); $data['isNested'] = $this->isNested(); $data['allowCustom'] = $this->allowCustom(); $data['minTermLength'] = (int) $this->comParams->get('min_term_length', 3); return $this->getRenderer($this->layout)->render($data); } /** * Method to get a list of tags * * @return array The field option objects. * * @since 3.1 */ protected function getOptions() { $published = (string) $this->element['published'] ?: array(0, 1); $app = Factory::getApplication(); $language = null; $options = []; // This limit is only used with isRemoteSearch $prefillLimit = 30; $isRemoteSearch = $this->isRemoteSearch(); $db = Factory::getDbo(); $query = $db->getQuery(true) ->select( [ 'DISTINCT ' . $db->quoteName('a.id', 'value'), $db->quoteName('a.path'), $db->quoteName('a.title', 'text'), $db->quoteName('a.level'), $db->quoteName('a.published'), $db->quoteName('a.lft'), ] ) ->from($db->quoteName('#__tags', 'a')) ->join( 'LEFT', $db->quoteName('#__tags', 'b'), $db->quoteName('a.lft') . ' > ' . $db->quoteName('b.lft') . ' AND ' . $db->quoteName('a.rgt') . ' < ' . $db->quoteName('b.rgt') ); // Limit Options in multilanguage if ($app->isClient('site') && Multilanguage::isEnabled()) { if (ComponentHelper::getParams('com_tags')->get('tag_list_language_filter') === 'current_language') { $language = [$app->getLanguage()->getTag(), '*']; } } // Filter language elseif (!empty($this->element['language'])) { if (strpos($this->element['language'], ',') !== false) { $language = explode(',', $this->element['language']); } else { $language = [$this->element['language']]; } } if ($language) { $query->whereIn($db->quoteName('a.language'), $language, ParameterType::STRING); } $query->where($db->quoteName('a.lft') . ' > 0'); // Filter on the published state if (is_numeric($published)) { $published = (int) $published; $query->where($db->quoteName('a.published') . ' = :published') ->bind(':published', $published, ParameterType::INTEGER); } elseif (\is_array($published)) { $published = ArrayHelper::toInteger($published); $query->whereIn($db->quoteName('a.published'), $published); } $query->order($db->quoteName('a.lft') . ' ASC'); // Preload only active values and 30 most used tags or fill up if ($isRemoteSearch) { // Load the most $prefillLimit used tags $topQuery = $db->getQuery(true) ->select($db->quoteName('tag_id')) ->from($db->quoteName('#__contentitem_tag_map')) ->group($db->quoteName('tag_id')) ->order('count(*)') ->setLimit($prefillLimit); $db->setQuery($topQuery); $topIds = $db->loadColumn(); // Merge the used values into the most used tags if (!empty($this->value) && is_array($this->value)) { $topIds = array_merge($topIds, $this->value); $topIds = array_keys(array_flip($topIds)); } // Set the default limit for the main query $query->setLimit($prefillLimit); if (!empty($topIds)) { // Filter the ids to the most used tags and the selected tags $preQuery = clone $query; $preQuery->whereIn($db->quoteName('a.id'), $topIds); $db->setQuery($preQuery); try { $options = $db->loadObjectList(); } catch (\RuntimeException $e) { return array(); } // Limit the main query to the missing amount of tags $count = count($options); $prefillLimit = $prefillLimit - $count; $query->setLimit($prefillLimit); // Exclude the already loaded tags from the main query if ($count > 0) { $query->whereNotIn($db->quoteName('a.id'), ArrayHelper::getColumn($options, 'value')); } } } // Only execute the query if we need more tags not already loaded by the $preQuery query if (!$isRemoteSearch || $prefillLimit > 0) { // Get the options. $db->setQuery($query); try { $options = array_merge($options, $db->loadObjectList()); } catch (\RuntimeException $e) { return array(); } } // Block the possibility to set a tag as it own parent if ($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 { $options = TagsHelper::convertPathsToNames($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 $options; } /** * Determine if the field has to be tagnested * * @return boolean * * @since 3.1 */ public function isNested() { if ($this->isNested === null) { // If mode="nested" || ( mode not set & config = nested ) if (isset($this->element['mode']) && (string) $this->element['mode'] === 'nested' || !isset($this->element['mode']) && $this->comParams->get('tag_field_ajax_mode', 1) == 0) { $this->isNested = true; } } return $this->isNested; } /** * Determines if the field allows or denies custom values * * @return boolean */ public function allowCustom() { if ($this->element['custom'] && \in_array((string) $this->element['custom'], array('0', 'false', 'deny'))) { return false; } return Factory::getUser()->authorise('core.create', 'com_tags'); } /** * Check whether need to enable AJAX search * * @return boolean * * @since 4.0.0 */ public function isRemoteSearch() { if ($this->element['remote-search']) { return !\in_array((string) $this->element['remote-search'], array('0', 'false', '')); } return $this->comParams->get('tag_field_ajax_mode', 1) == 1; } }