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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2007 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\HTML\Helpers;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\HTML\HTMLHelper;
use Joomla\CMS\Language\Text;
use Joomla\Database\DatabaseQuery;
use Joomla\String\StringHelper;

/**
 * Utility class for creating different select lists
 *
 * @since  1.5
 */
abstract class ListHelper
{
	/**
	 * Build the select list to choose an image
	 *
	 * @param   string  $name        The name of the field
	 * @param   string  $active      The selected item
	 * @param   string  $javascript  Alternative javascript
	 * @param   string  $directory   Directory the images are stored in
	 * @param   string  $extensions  Allowed extensions
	 *
	 * @return  array  Image names
	 *
	 * @since   1.5
	 */
	public static function images($name, $active = null, $javascript = null, $directory = null, $extensions = 'bmp|gif|jpg|png')
	{
		if (!$directory)
		{
			$directory = '/images/';
		}

if (!$javascript)
		{
			$javascript = "onchange=\"if (document.forms.adminForm." . $name
				. ".options[selectedIndex].value!='') {document.imagelib.src='..$directory' + document.forms.adminForm." . $name
				. ".options[selectedIndex].value} else {document.imagelib.src='media/system/images/blank.png'}\"";
		}

$imageFiles = new \DirectoryIterator(JPATH_SITE . '/' . $directory);
		$images = array(HTMLHelper::_('select.option', '', Text::_('JOPTION_SELECT_IMAGE')));

foreach ($imageFiles as $file)
		{
			$fileName = $file->getFilename();

if (!$file->isFile())
			{
				continue;
			}

if (preg_match('#(' . $extensions . ')$#', $fileName))
			{
				$images[] = HTMLHelper::_('select.option', $fileName);
			}
		}

$images = HTMLHelper::_(
			'select.genericlist',
			$images,
			$name,
			array(
				'list.attr' => 'size="1" ' . $javascript,
				'list.select' => $active,
			)
		);

return $images;
	}

/**
	 * Returns an array of options
	 *
	 * @param   DatabaseQuery|string   $query  SQL with 'ordering' AS value and 'name field' AS text
	 * @param   integer                $chop   The length of the truncated headline
	 *
	 * @return  array  An array of objects formatted for JHtml list processing
	 *
	 * @since   1.5
	 */
	public static function genericordering($query, $chop = 30)
	{
		$db = Factory::getDbo();
		$options = array();
		$db->setQuery($query);

$items = $db->loadObjectList();

if (empty($items))
		{
			$options[] = HTMLHelper::_('select.option', 1, Text::_('JLIB_FORM_FIELD_PARAM_INTEGER_FIRST_LABEL'));

return $options;
		}

$options[] = HTMLHelper::_('select.option', 0, ' - ' . Text::_('JLIB_FORM_FIELD_PARAM_INTEGER_FIRST_LABEL') . ' - ');

for ($i = 0, $n = count($items); $i < $n; $i++)
		{
			$items[$i]->text = Text::_($items[$i]->text);

if (StringHelper::strlen($items[$i]->text) > $chop)
			{
				$text = StringHelper::substr($items[$i]->text, 0, $chop) . '...';
			}
			else
			{
				$text = $items[$i]->text;
			}

$options[] = HTMLHelper::_('select.option', $items[$i]->value, $text);
		}

$options[] = HTMLHelper::_('select.option', $items[$i - 1]->value + 1, ' - ' . Text::_('JLIB_FORM_FIELD_PARAM_INTEGER_LAST_LABEL') . ' - ');

return $options;
	}

/**
	 * Build the select list for Ordering derived from a query
	 *
	 * @param   integer  $name      The scalar value
	 * @param   string   $query     The query
	 * @param   string   $attribs   HTML tag attributes
	 * @param   string   $selected  The selected item
	 * @param   integer  $neworder  1 if new and first, -1 if new and last, 0  or null if existing item
	 * @param   string   $id        ID attribute for the resulting <select> element
	 *
	 * @return  string   HTML markup for the select list
	 *
	 * @since   1.6
	 */
	public static function ordering($name, $query, $attribs = null, $selected = null, $neworder = null, ?string $id = null)
	{
		if (empty($attribs))
		{
			$attribs = 'size="1"';
		}

if (empty($neworder))
		{
			$orders = HTMLHelper::_('list.genericordering', $query);
			$html   = HTMLHelper::_(
				'select.genericlist',
				$orders,
				$name,
				['list.attr' => $attribs, 'list.select' => (int) $selected, 'id' => $id ?? false]
			);
		}
		else
		{
			if ($neworder > 0)
			{
				$text = Text::_('JGLOBAL_NEWITEMSLAST_DESC');
			}
			elseif ($neworder <= 0)
			{
				$text = Text::_('JGLOBAL_NEWITEMSFIRST_DESC');
			}

$html = '<input type="hidden" name="' . $name . '" value="' . (int) $selected . '"><span class="readonly">' . $text . '</span>';
		}

return $html;
	}

/**
	 * Select list of active users
	 *
	 * @param   string   $name        The name of the field
	 * @param   string   $active      The active user
	 * @param   integer  $nouser      If set include an option to select no user
	 * @param   string   $javascript  Custom javascript
	 * @param   string   $order       Specify a field to order by
	 *
	 * @return  string   The HTML for a list of users list of users
	 *
	 * @since   1.5
	 */
	public static function users($name, $active, $nouser = 0, $javascript = null, $order = 'name')
	{
		$db = Factory::getDbo();
		$query = $db->getQuery(true)
			->select(
				[
					$db->quoteName('u.id', 'value'),
					$db->quoteName('u.name', 'text'),
				]
			)
			->from($db->quoteName('#__users', 'u'))
			->join('LEFT', $db->quoteName('#__user_usergroup_map', 'm'), $db->quoteName('m.user_id') . ' = ' . $db->quoteName('u.id'))
			->where($db->quoteName('u.block') . ' = 0')
			->order($order)
			->group($db->quoteName('u.id'));
		$db->setQuery($query);

if ($nouser)
		{
			$users[] = HTMLHelper::_('select.option', '0', Text::_('JOPTION_NO_USER'));
			$users = array_merge($users, $db->loadObjectList());
		}
		else
		{
			$users = $db->loadObjectList();
		}

$users = HTMLHelper::_(
			'select.genericlist',
			$users,
			$name,
			array(
				'list.attr' => 'size="1" ' . $javascript,
				'list.select' => $active,
			)
		);

return $users;
	}

/**
	 * Select list of positions - generally used for location of images
	 *
	 * @param   string   $name        Name of the field
	 * @param   string   $active      The active value
	 * @param   string   $javascript  Alternative javascript
	 * @param   boolean  $none        Null if not assigned
	 * @param   boolean  $center      Null if not assigned
	 * @param   boolean  $left        Null if not assigned
	 * @param   boolean  $right       Null if not assigned
	 * @param   boolean  $id          Null if not assigned
	 *
	 * @return  array  The positions
	 *
	 * @since   1.5
	 */
	public static function positions($name, $active = null, $javascript = null, $none = true, $center = true, $left = true, $right = true,
		$id = false
	)
	{
		$pos = array();

if ($none)
		{
			$pos[''] = Text::_('JNONE');
		}

if ($center)
		{
			$pos['center'] = Text::_('JGLOBAL_CENTER');
		}

if ($left)
		{
			$pos['left'] = Text::_('JGLOBAL_LEFT');
		}

if ($right)
		{
			$pos['right'] = Text::_('JGLOBAL_RIGHT');
		}

$positions = HTMLHelper::_(
			'select.genericlist', $pos, $name,
			array(
				'id' => $id,
				'list.attr' => 'size="1"' . $javascript,
				'list.select' => $active,
				'option.key' => null,
			)
		);

return $positions;
	}
}