<?php
/**
 * Fonctions utiles au plugin Block Log
 *
 * @plugin     Block Log
 * @copyright  2019
 * @author     tofulm
 * @licence    GNU/GPL
 * @package    SPIP\Blocklog\Fonctions
 */

if (!defined('_ECRIRE_INC_VERSION')) {
	return;
}

function trouver_blocklog($id_objet, $objet, $id = false){
	static $r;

	if ($r == null) {
		$from = array(
			'spip_blocklogs',
		);
		$where = array(
			'id_objet='.intval($id_objet),
			'objet='.sql_quote($objet),
		);
		$r = sql_fetsel('id_blocklog, blockchaine, chaine', $from, $where);
	}

	if ($id) {
		return $r;
	}

	return $r['blockchaine'];
}


function blocklog_verifier_blockchaine($id_objet, $objet){
	if (intval($id_objet) and $objet) {
		$r = trouver_blocklog($id_objet, $objet, true);

		$where = array(
			'objet='.sql_quote($objet),
			'id_blocklog<'.intval($r['id_blocklog'])
		);

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


		$blockchaine .= "|" . $r['chaine'];
		$blockchaine  = hash(_BLOCKLOG_ALGO, $blockchaine);

		return $blockchaine === $r['blockchaine'];
	}
}

function blocklog_verifier_blockchaines($objet, $date_debut = '', $date_fin = ''){

	if (empty($objet)) {
		return [];
	}

	if (empty($date_debut)) {
		$date_debut = date_create() -> modify('-1 year')->format('Y-m-d H:i:s');
	} else {
		$date_debut = date_create($date_debut)->format('Y-m-d H:i:s');
	}
	if (empty($date_fin)) {
		$date_fin = date_create()->format('Y-m-d H:i:s');
	} else {
		$date_fin = date_create($date_fin)->format('Y-m-d 23:59:59');
	}

	$from = 'spip_blocklogs';
	$where = array(
		'objet='.sql_quote($objet),
		'maj>='.sql_quote($date_debut),
		'maj<='.sql_quote($date_fin),
	);

	$res = sql_allfetsel('*', $from, $where);
	$retour = [];
	if (count($res)) {
		$blockchaine = "";
		foreach ($res as $r) {
			$blockchaine .= "|" . $r['chaine'];
			$blockchaine  = hash(_BLOCKLOG_ALGO, $blockchaine);
			if ($blockchaine === $r['blockchaine']){
				$r['v'] = 'ok';
				$retour[] = $r;
			} else {
				$r['v'] = 'error';
				$retour[] = $r;
				break;
			}
		}
	}

	return $retour;
}