<?php

namespace AppWidgets;

class TextWidget extends WP_Widget
{
    public function __construct()
    {
        $widgetOpts = array(
            'classname' => 'widget_text',
            'description' => __('Um texto puro qualquer.'),
            'customize_selective_refresh' => true,
        );

        parent::__construct('custom_text', __('Texto puro'), $widgetOpts);
    }

    public static function init()
    {
        add_action('widgets_init', function() {
            register_widget(self::class);
        });
    }

    public function widget($args, $instance)
    {
        echo esc_html__($instance['content'], 'text_domain');
    }

    public function form($instance)
    {
        $instance = wp_parse_args(
            (array) $instance,
            ['content' => '']
        );
        ?>
        <p>
            <textarea
                class="widefat"
                id="<?php echo esc_attr($this->get_field_id('content')); ?>"
                name="<?php echo esc_attr($this->get_field_name('content')); ?>"
                type="text"
                cols="30"
                rows="10"
            ><?php echo esc_attr($instance['content']); ?></textarea>
        </p>
        <?php
    }

    public function update($newInstance, $oldInstance)
    {
        $instance = array();

        $instance['content'] = (!empty( $newInstance['content'])) ? $oldInstance['content'] : '';

        return $instance;
    }
}