<?php

/**
 * @package     Joomla.Administrator
 * @subpackage  com_config
 *
 * @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\Component\Config\Administrator\Field;

use Joomla\CMS\Factory;
use Joomla\CMS\Form\FormField;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Layout\LayoutHelper;

/**
 * Text Filters form field.
 *
 * @since  1.6
 */
class FiltersField extends FormField
{
    /**
     * The form field type.
     *
     * @var     string
     * @since   1.6
     */
    public $type = 'Filters';

    /**
     * Method to get the field input markup.
     *
     * @todo: Add access check.
     *
     * @return  string  The field input markup.
     *
     * @since   1.6
     */
    protected function getInput()
    {
        // Add translation string for notification
        Text::script('COM_CONFIG_TEXT_FILTERS_NOTE');

        // Add Javascript
        Factory::getDocument()->getWebAssetManager()->useScript('com_config.filters');

        // Get the available user groups.
        $groups = $this->getUserGroups();

        // Build the form control.
        $html = array();

        // Open the table.
        $html[] = '<table id="filter-config" class="table">';

        // The table heading.
        $html[] = '	<thead>';
        $html[] = '	<tr>';
        $html[] = '		<th>';
        $html[] = '			<span class="acl-action">' . Text::_('JGLOBAL_FILTER_GROUPS_LABEL') . '</span>';
        $html[] = '		</th>';
        $html[] = '		<th>';
        $html[] = '			<span class="acl-action">' . Text::_('JGLOBAL_FILTER_TYPE_LABEL') . '</span>';
        $html[] = '		</th>';
        $html[] = '		<th>';
        $html[] = '			<span class="acl-action">' . Text::_('JGLOBAL_FILTER_TAGS_LABEL') . '</span>';
        $html[] = '		</th>';
        $html[] = '		<th>';
        $html[] = '			<span class="acl-action">' . Text::_('JGLOBAL_FILTER_ATTRIBUTES_LABEL') . '</span>';
        $html[] = '		</th>';
        $html[] = '	</tr>';
        $html[] = '	</thead>';

        // The table body.
        $html[] = '	<tbody>';

        foreach ($groups as $group) {
            if (!isset($this->value[$group->value])) {
                $this->value[$group->value] = array('filter_type' => 'BL', 'filter_tags' => '', 'filter_attributes' => '');
            }

            $group_filter = $this->value[$group->value];

            $group_filter['filter_tags']       = !empty($group_filter['filter_tags']) ? $group_filter['filter_tags'] : '';
            $group_filter['filter_attributes'] = !empty($group_filter['filter_attributes']) ? $group_filter['filter_attributes'] : '';

            $html[] = '	<tr>';
            $html[] = '		<td class="acl-groups left">';
            $html[] = '			' . LayoutHelper::render('joomla.html.treeprefix', array('level' => $group->level + 1)) . $group->text;
            $html[] = '		</td>';
            $html[] = '		<td>';
            $html[] = '			<label for="' . $this->id . $group->value . '_filter_type" class="visually-hidden">'
                . Text::_('JGLOBAL_FILTER_TYPE_LABEL') . '</label>';
            $html[] = '				<select'
                . ' name="' . $this->name . '[' . $group->value . '][filter_type]"'
                . ' id="' . $this->id . $group->value . '_filter_type"'
                . ' data-parent="' . ($group->parent) . '" '
                . ' data-id="' . ($group->value) . '" '
                . ' class="novalidate form-select"'
                . '>';
            $html[] = '					<option value="BL"' . ($group_filter['filter_type'] == 'BL' ? ' selected="selected"' : '') . '>'
                . Text::_('COM_CONFIG_FIELD_FILTERS_DEFAULT_FORBIDDEN_LIST') . '</option>';
            $html[] = '					<option value="CBL"' . ($group_filter['filter_type'] == 'CBL' ? ' selected="selected"' : '') . '>'
                . Text::_('COM_CONFIG_FIELD_FILTERS_CUSTOM_FORBIDDEN_LIST') . '</option>';
            $html[] = '					<option value="WL"' . ($group_filter['filter_type'] == 'WL' ? ' selected="selected"' : '') . '>'
                . Text::_('COM_CONFIG_FIELD_FILTERS_ALLOWED_LIST') . '</option>';
            $html[] = '					<option value="NH"' . ($group_filter['filter_type'] == 'NH' ? ' selected="selected"' : '') . '>'
                . Text::_('COM_CONFIG_FIELD_FILTERS_NO_HTML') . '</option>';
            $html[] = '					<option value="NONE"' . ($group_filter['filter_type'] == 'NONE' ? ' selected="selected"' : '') . '>'
                . Text::_('COM_CONFIG_FIELD_FILTERS_NO_FILTER') . '</option>';
            $html[] = '				</select>';
            $html[] = '		</td>';
            $html[] = '		<td>';
            $html[] = '			<label for="' . $this->id . $group->value . '_filter_tags" class="visually-hidden">'
                . Text::_('JGLOBAL_FILTER_TAGS_LABEL') . '</label>';
            $html[] = '				<input'
                . ' name="' . $this->name . '[' . $group->value . '][filter_tags]"'
                . ' type="text"'
                . ' id="' . $this->id . $group->value . '_filter_tags" class="novalidate form-control"'
                . ' value="' . htmlspecialchars($group_filter['filter_tags'], ENT_QUOTES) . '"'
                . '>';
            $html[] = '		</td>';
            $html[] = '		<td>';
            $html[] = '			<label for="' . $this->id . $group->value . '_filter_attributes"'
                . ' class="visually-hidden">' . Text::_('JGLOBAL_FILTER_ATTRIBUTES_LABEL') . '</label>';
            $html[] = '				<input'
                . ' name="' . $this->name . '[' . $group->value . '][filter_attributes]"'
                . ' type="text"'
                . ' id="' . $this->id . $group->value . '_filter_attributes" class="novalidate form-control"'
                . ' value="' . htmlspecialchars($group_filter['filter_attributes'], ENT_QUOTES) . '"'
                . '>';
            $html[] = '		</td>';
            $html[] = '	</tr>';
        }

        $html[] = '	</tbody>';

        // Close the table.
        $html[] = '</table>';

        return implode("\n", $html);
    }

    /**
     * A helper to get the list of user groups.
     *
     * @return  array
     *
     * @since   1.6
     */
    protected function getUserGroups()
    {
        // Get a database object.
        $db = $this->getDatabase();

        // Get the user groups from the database.
        $query = $db->getQuery(true);
        $query->select('a.id AS value, a.title AS text, COUNT(DISTINCT b.id) AS level, a.parent_id as parent');
        $query->from('#__usergroups AS a');
        $query->join('LEFT', '#__usergroups AS b on a.lft > b.lft AND a.rgt < b.rgt');
        $query->group('a.id, a.title, a.lft');
        $query->order('a.lft ASC');
        $db->setQuery($query);
        $options = $db->loadObjectList();

        return $options;
    }
}
