<?php
/**
 *
 * Confirmation de lecture
 *
 */


add_filter( 'rwmb_meta_boxes', 'confirmation_lecture_register_meta_boxes' );

function confirmation_lecture_register_meta_boxes( $meta_boxes ) {
    $prefix = '';

    //global $post;
    //$post_id = $post->ID;

    //$ben = $GLOBALS['post']->ID;

    $ip_address = $_SERVER['SERVER_ADDR'];

    $meta_boxes[] = [
        'title'      => esc_html__( 'Confirmation de lecture', 'text-domain' ),
        'id'         => 'confirmation-lecture',
        'fields'     => [
            [
                'id'       => $prefix . 'signature',
                'type'     => 'text',
                'name'     => esc_html__( 'Signature', 'text-domain' ),
                'required' => 1,
            ],
            [
                'id'   => $prefix . 'check_lecture',
                'name' => esc_html__( '« Je confirme avoir lu le document »', 'text-domain' ),
                'type' => 'checkbox',
                'required' => 1,
            ],
            [
                'id'   => $prefix . 'testtest',
                'type' => 'text',
                'attributes' => array(
                    'value' =>  $post_id, // Here is the value who's not working
                )
            ],
            array(
                'id'   => $prefix . 'hidden_postid',
                'type' => 'hidden',
                'attributes' => array(
                    'value' =>  $post_id, // I tried both types text and hidden
                )
            ),
            array(
                'id'   => $prefix . 'ip_adrress',
                'type' => 'hidden',
                'attributes' => array(
                    'value' =>  $ip_address, // this value works well
                )
            ),
            array(
                'id' => 'date_signature',
                'type' => 'hidden',
                'attributes' => array(
                    'value' => date('d/m/Y'), // this value works well
                )
            ),
        ],
        'validation' => array(
            'messages' => array(
                'signature' => array(
                    'required'   => 'Vous devez signer.',
                ),
                'check_lecture' => array(
                    'required'   => 'Vous devez confirmer la lecture.',
                ),
            ),
        ),
    ];

    return $meta_boxes;
}