<?php
/**
 * @package     Joomla.Site
 * @subpackage  Layout
 *
 * @copyright   (C) 2015 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('_JEXEC') or die;

use Joomla\Registry\Registry;

/**
 * Layout variables
 * ---------------------
 *
 * @var  string   $selector       The id of the field
 * @var  string   $minTermLength  The minimum number of characters for the tag
 * @var  boolean  $allowCustom    Can we insert custom tags?
 */

extract($displayData);


// Tags field ajax
$chosenAjaxSettings = new Registry(
	array(
		'selector'      => $selector,
		'type'          => 'GET',
		'url'           => JUri::root() . 'index.php?option=com_tags&task=tags.searchAjax',
		'dataType'      => 'json',
		'jsonTermKey'   => 'like',
		'minTermLength' => $minTermLength
	)
);

JHtml::_('formbehavior.ajaxchosen', $chosenAjaxSettings);

// Allow custom values?
if ($allowCustom)
{
	JFactory::getDocument()->addScriptDeclaration(
		"
		jQuery(document).ready(function ($) {
			var customTagPrefix = '#new#';

			function tagHandler(event,element) {
				// Search a highlighted result

				var highlighted = $('" . $selector . "_chzn').find('li.active-result.highlighted').first();

				// Add the highlighted option
				if (event.which === 13 && highlighted.text() !== '')
				{
					// Extra check. If we have added a custom tag with element text remove it
					var customOptionValue = customTagPrefix + highlighted.text();
					$('" . $selector . " option').filter(function () { return $(element).val() == customOptionValue; }).remove();

					// Select the highlighted result
					var tagOption = $('" . $selector . " option').filter(function () { return $(element).html() == highlighted.text(); });
					tagOption.attr('selected', 'selected');
				}
				// Add the custom tag option
				else
				{
					var customTag = element.value;

					// Extra check. Search if the custom tag already exists (typed faster than AJAX ready)
					var tagOption = $('" . $selector . " option').filter(function () { return $(element).html() == customTag; });
					if (tagOption.text() !== '')
					{
						tagOption.attr('selected', 'selected');
					}
					else
					{
						var option = $('<option>');
						option.text(element.value).val(customTagPrefix + element.value);
						option.attr('selected','selected');

						// Append the option and repopulate the chosen field
						$('" . $selector . "').append(option);
					}
				}

				element.value = '';
				$('" . $selector . "').trigger('liszt:updated');
			}

			// Method to add tags pressing comma
			$('" . $selector . "_chzn input').keypress(function(event) {
				if (event.charCode === 44)
				{
					// Tag is greater than the minimum required chars
					if (this.value && this.value.length >= " . $minTermLength . ")
					{
						tagHandler(event, this);
					}

					// Do not add comma to tag at all
					event.preventDefault();
				}
			});

			// Method to add tags pressing enter
			$('" . $selector . "_chzn input').keyup(function(event) {
				// Tag is greater than the minimum required chars and enter pressed
				if (event.which === 13 && this.value && this.value.length >= " . $minTermLength . ")
				{
					tagHandler(event,this);
					event.preventDefault();
				}
			});
		});
		"
	);
}