<?php
// no direct access
defined('ABSPATH') or die();

if(!class_exists('LSD_Kses')):

/**
 * Listdom Kses Class.
 *
 * @class LSD_Kses
 * @version	1.0.0
 */
class LSD_Kses extends LSD_Base
{
    static $allowed_html_form = null;
    static $allowed_html_element = null;
    static $allowed_html_rich = null;
    static $allowed_html_embed = null;
    static $allowed_html_page = null;
    static $allowed_attrs = array(
        'data-*' => 1,
        'aria-*' => 1,
        'type' => 1,
        'value' => 1,
        'class' => 1,
        'id' => 1,
        'for' => 1,
        'style' => 1,
        'src' => 1,
        'alt' => 1,
        'title' => 1,
        'placeholder' => 1,
        'href' => 1,
        'rel' => 1,
        'target' => 1,
        'novalidate' => 1,
        'name' => 1,
        'tabindex' => 1,
        'action' => 1,
        'method' => 1,
        'width' => 1,
        'height' => 1,
        'selected' => 1,
        'checked' => 1,
        'readonly' => 1,
        'disabled' => 1,
        'required' => 1,
        'autocomplete' => 1,
        'min' => 1,
        'max' => 1,
        'step' => 1,
        'cols' => 1,
        'rows' => 1,
        'lang' => 1,
        'dir' => 1,
        'enctype' => 1,
        'multiple' => 1,
        'frameborder' => 1,
        'allow' => 1,
        'allowfullscreen' => 1,
        'label' => 1,
        'align' => 1,
        'accept-charset' => 1,
    );

    static $schema_attr = array(
        'itemtype' => 1,
        'itemscope' => 1,
        'itemprop' => 1,
        'content' => 1,
    );

    public function __construct()
    {
        parent::__construct();
    }

    public function init()
    {
        add_filter('lsd_kses_tags', array($this, 'tags'), 10, 2);
    }

    public static function page($html)
    {
        if(is_null(self::$allowed_html_page))
        {
            $allowed = wp_kses_allowed_html('post');
            self::$allowed_html_page = apply_filters('lsd_kses_tags', $allowed, 'page');
        }

        return wp_kses($html, self::$allowed_html_page);
    }

    public static function form($html)
    {
        if(is_null(self::$allowed_html_form))
        {
            $allowed = wp_kses_allowed_html('post');
            self::$allowed_html_form = apply_filters('lsd_kses_tags', $allowed, 'form');
        }

        return wp_kses($html, self::$allowed_html_form);
    }

    public static function element($html)
    {
        if(is_null(self::$allowed_html_element))
        {
            $allowed = wp_kses_allowed_html('post');
            self::$allowed_html_element = apply_filters('lsd_kses_tags', $allowed, 'element');
        }

        return wp_kses($html, self::$allowed_html_element);
    }

    /**
     * Element + Embed
     * @param $html
     * @return string
     */
    public static function rich($html)
    {
        if(is_null(self::$allowed_html_rich))
        {
            $allowed = wp_kses_allowed_html('post');
            self::$allowed_html_rich = apply_filters('lsd_kses_tags', $allowed, 'rich');
        }

        return wp_kses($html, self::$allowed_html_rich);
    }

    /**
     * Only Embed
     * @param $html
     * @return string
     */
    public static function embed($html)
    {
        if(is_null(self::$allowed_html_embed))
        {
            self::$allowed_html_embed = apply_filters('lsd_kses_tags', [], 'embed');
        }

        return wp_kses($html, self::$allowed_html_embed);
    }

    public static function tags($tags, $context)
    {
        if(in_array($context, array('form', 'page')))
        {
            $tags['form'] = self::$allowed_attrs;
            $tags['label'] = self::$allowed_attrs;
            $tags['input'] = self::$allowed_attrs;
            $tags['select'] = self::$allowed_attrs;
            $tags['option'] = self::$allowed_attrs;
            $tags['optgroup'] = self::$allowed_attrs;
            $tags['textarea'] = self::$allowed_attrs;
            $tags['button'] = self::$allowed_attrs;
            $tags['fieldset'] = self::$allowed_attrs;
            $tags['output'] = self::$allowed_attrs;
        }

        if(in_array($context, array('embed', 'rich')))
        {
            if(!isset($tags['iframe'])) $tags['iframe'] = self::$allowed_attrs;
        }

        // Add Schema Attributes
        if(LSD_Base::isPro()) foreach($tags as $tag => $attr) $tags[$tag] = array_merge($attr, self::$schema_attr);

        return $tags;
    }
}

endif;