<?php
// register sidebar
if (function_exists('register_sidebar')) {
    register_sidebar(
        array(
            'name' => 'Footer external links',
            'id' => 'footer_external_links',
            'description' => 'You can write footer info here',
            'before_widget' => '',
            'after_widget' => '',
        )
    );
}

// register widget
add_action('widgets_init', 'poly_external_link_widget');
function poly_external_link_widget()
{
    register_widget('poly_external_links');
}

class Poly_External_Links extends WP_Widget
{

    function __construct()
    {
        parent::__construct(
            'external_links',
            'External links',
            array(
                'description' => 'External links',
                'classname' => 'poly_external_links'
            )
        );
    }

    // render widget result in frontend
    function widget($args, $instance)
    {
        $title = apply_filters('widget_title', $instance['title']);
        $posts = apply_filters('widget_posts', $instance['posts']);
        $visible_url = apply_filters('widget_url', $instance['url']);
        $url = apply_filters('widget_url', $instance['url']);
        $popup = apply_filters('widget_title', $instance['popup']);

        $html = '<div class="dataWrap__content"><a href="' . get_option('siteurl') . '/' . $visible_url . '" class="mnu anchor" data-custom-anchor="' . $url . '">' . $title . '</a></div>';
        if ($posts !== 'default' && !empty($posts)) {
            $icl_object_id = icl_object_id($posts, 'post', true);
            global $sitepress;
            $lang = $sitepress->get_current_language() . '/';
            
            $html = '<div class="dataWrap__content"><a href="' . get_the_permalink($icl_object_id) . '" class="mnu">' . $title . '</a></div>';
        } else if($popup) {
            $html = '<div class="dataWrap__content"><a href="#" class="mnu formPopup">' . $title . '</a></div>';
        }

        echo $args['before_widget'];

        echo $html;

        echo $args['after_widget'];
    }

    // render widget in admin
    function form($instance)
    {

        $title = @ $instance['title'] ?: '';
        $visible_url = @ $instance['visible_url'] ?: '';
        $url = @ $instance['url'] ?: '';
        $posts = @ $instance['posts'] ?: '';
        $popup = @ $instance['popup'] ?: '';

        $inc = 0;
        $query = new WP_Query(array(
            'post_type' => array('post', 'skills', 'ai'),
            'posts_per_page' => -1,
        ));

        ?>

        <p>
            <label for="<?php echo $this->get_field_id('popup'); ?>">Popup?</label><br/>
            <?php if($popup) : ?>
                <input class="widefat" id="<?php echo $this->get_field_id('popup'); ?>"
                       name="<?php echo $this->get_field_name('popup'); ?>" type="checkbox"
                       value="popup" checked>
            <?php else : ?>
                <input class="widefat" id="<?php echo $this->get_field_id('popup'); ?>"
                       name="<?php echo $this->get_field_name('popup'); ?>" type="checkbox"
                       value="popup">
            <?php endif; ?>
        </p>
        <p>
            <label for="<?php echo $this->get_field_id('title'); ?>">Title</label><br/>
            <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>"
                   name="<?php echo $this->get_field_name('title'); ?>" type="text"
                   value="<?php echo esc_attr($title); ?>">
        </p>
        <p>
            <label for="<?php echo $this->get_field_id('visible_url'); ?>">Visible_url</label>
            <input class="widefat" id="<?php echo $this->get_field_id('visible_url'); ?>"
                   name="<?php echo $this->get_field_name('visible_url'); ?>" type="text"
                   value="<?php echo esc_attr($visible_url); ?>">
        </p>
        <p>
            <label for="<?php echo $this->get_field_id('url'); ?>">Url</label>
            <input class="widefat" id="<?php echo $this->get_field_id('url'); ?>"
                   name="<?php echo $this->get_field_name('url'); ?>" type="text"
                   value="<?php echo esc_attr($url); ?>">
        </p>
        <?php if ($query->have_posts()) : ?>
        <p>Or</p>
        <p>
            <label for="<?php echo $this->get_field_id('posts'); ?>">Posts</label>
            <select class="widefat" id="<?php echo $this->get_field_id('posts'); ?>"
                    name="<?php echo $this->get_field_name('posts'); ?>">

                <?php $k = 0; while ($query->have_posts()) : $query->the_post(); ?>
                   
                    <?php if (isset($posts)) : ?>

                        <?php if ($inc == 0) : ?>
                            <option value="default">Select post</option>
                        <?php endif; ?>

                        <?php if ($posts == $query->post->ID) : ?>

                            <option value="<?php echo esc_attr($query->post->ID); ?>" selected>
                                <?php echo esc_attr($query->post->post_title); ?>
                            </option>

                        <?php else : ?>

                            <option value="<?php echo esc_attr($query->post->ID); ?>">
                                <?php echo esc_attr($query->post->post_title); ?>
                            </option>

                        <?php endif; ?>

                    <?php else : ?>

                        <?php if ($inc == 0) : ?>

                            <option value="default" selected>Select post</option>

                        <?php else : ?>

                            <option value="<?php echo esc_attr($query->post->ID); ?>">
                                <?php echo esc_attr($query->post->post_title); ?>
                            </option>

                        <?php endif; ?>

                    <?php endif; ?>

                    <?php $inc++; ?>

                <?php endwhile;?>

            </select>
        </p>

    <?php endif; ?>

        <?php
    }

    // save widget data
    function update($new_instance, $old_instance)
    {
        $instance = $old_instance;
        $instance['title'] = strip_tags($new_instance['title']);
        $instance['visible_url'] = strip_tags($new_instance['visible_url']);
        $instance['url'] = strip_tags($new_instance['url']);
        $instance['posts'] = strip_tags($new_instance['posts']);
        $instance['popup'] = strip_tags($new_instance['popup']);
        return $instance;
    }

}