<?php
if (!defined('_ECRIRE_INC_VERSION')){
	return;
}


/**
 * creation de la blockchaine
 *
 * @param string $objet
 * @param int $id_objet
 * @param string | array $chaine : ensemble des valeurs utilisées pour creer la chaine
 * @return array [id_blocklog, chaine, blockchaine]
 */
function inc_blocklog_dist($objet, $id_objet = 0, $num = 0, $chaine = '') {
	if (!$objet or !$id_objet or !$chaine) {
		return false;
	}

	if (defined('_DEBUG_BLOCKLOG')) {
		spip_log('objet = '.$objet, 'blocklog');
		spip_log('id_objet = '.$id_objet, 'blocklog');
		spip_log('num = '.$num, 'blocklog');
		spip_log('----------------', 'blocklog');
	}

	if (! defined("_BLOCKLOG_ALGO")) {
		define("_BLOCKLOG_ALGO", 'sha256');
	}

	if (is_array($chaine)) {
		$c = [];
		foreach ($chaine as $i => $v) {
			$c[] = $v;
		}
		$chaine = implode('|', $c);
	}
	if (defined('_DEBUG_BLOCKLOG')) {
		spip_log($chaine, 'blocklog');
	}

	$date = date_create();
	$chaine .= "|". date_timestamp_get($date);
	$chaine  = hash(_BLOCKLOG_ALGO, $chaine);


	$blockchaine  = sql_getfetsel('blockchaine', 'spip_blocklogs',1,'', 'id_blocklog DESC', '1');

	$blockchaine .= "|" . $chaine;
	$blockchaine  = hash(_BLOCKLOG_ALGO, $blockchaine);


	$set = array (
		'blockchaine' => $blockchaine,
		'chaine'      => $chaine,
		'num'         => intval($num)
	);

	if (defined('_DEBUG_BLOCKLOG')) {
		spip_log($set, 'blocklog');
		spip_log('================', 'blocklog');
	}

	include_spip('action/editer_objet');
	$id_blocklog = objet_inserer("blocklog");
	objet_modifier("blocklog", $id_blocklog, $set);
	$set['id_blocklog'] = $id_blocklog;


	include_spip('action/editer_liens');
	$objets_source = array("blocklog"=>$id_blocklog);
	$objets_lies = array($objet => $id_objet);
	objet_associer($objets_source, $objets_lies);

	return  $set;
}