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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2013 Open Source Matters, Inc. <https://www.joomla.org>
 * @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\Form\FormHelper;

FormHelper::loadFieldClass('list');

/**
 * Field to load a list of posible item count limits
 *
 * @since  3.2
 */
class LimitboxField extends \JFormFieldList
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  3.2
	 */
	public $type = 'Limitbox';

	/**
	 * Cached array of the category items.
	 *
	 * @var    array
	 * @since  3.2
	 */
	protected static $options = array();

	/**
	 * Default options
	 *
	 * @var  array
	 */
	protected $defaultLimits = array(5, 10, 15, 20, 25, 30, 50, 100, 200, 500);

	/**
	 * Method to get the options to populate to populate list
	 *
	 * @return  array  The field option objects.
	 *
	 * @since   3.2
	 */
	protected function getOptions()
	{
		// Accepted modifiers
		$hash = md5($this->element->asXML());

		if (!isset(static::$options[$hash]))
		{
			static::$options[$hash] = parent::getOptions();

			$options = array();
			$limits = $this->defaultLimits;

			// Limits manually specified
			if (isset($this->element['limits']))
			{
				$limits = explode(',', $this->element['limits']);
			}

			// User wants to add custom limits
			if (isset($this->element['append']))
			{
				$limits = array_unique(array_merge($limits, explode(',', $this->element['append'])));
			}

			// User wants to remove some default limits
			if (isset($this->element['remove']))
			{
				$limits = array_diff($limits, explode(',', $this->element['remove']));
			}

			// Order the options
			asort($limits);

			// Add an option to show all?
			$showAll = isset($this->element['showall']) ? (string) $this->element['showall'] === 'true' : true;

			if ($showAll)
			{
				$limits[] = 0;
			}

			if (!empty($limits))
			{
				foreach ($limits as $value)
				{
					$options[] = (object) array(
						'value' => $value,
						'text' => ($value != 0) ? \JText::_('J' . $value) : \JText::_('JALL'),
					);
				}

				static::$options[$hash] = array_merge(static::$options[$hash], $options);
			}
		}

		return static::$options[$hash];
	}
}