authority.class.php

<?php
/* Copyright (C) 2017 ATM Consulting <contact@atm-consulting.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

class BlockedLogAuthority
{

  public $id;

  public $signature = '';

  public $blockchain = '';

  public $tms = 0;

  public function __construct($db)
  {
    $this->db = $db;
  }

  public function getLocalBlockChain()
  {

    $block_static = new BlockedLog($this->db);

    $this->signature = $block_static->getSignature();

    $blocks = $block_static->getLog('all', 0, 0, 'rowid', 'ASC');

    $this->blockchain = '';

    foreach ($blocks as &$b) {
      $this->blockchain .= $b->signature;
    }

    return $this->blockchain;
  }

  public function getBlockchainHash()
  {

    return md5($this->signature.$this->blockchain);
  }

  public function checkBlockchain($hash)
  {

    return ($hash === $this->getBlockchainHash());
  }

  public function addBlock($block)
  {

    $this->blockchain .= $block;
  }

  public function checkBlock($block)
  {

    if (strlen($block) != 64) return false;

    $blocks = str_split($this->blockchain, 64);

    if (!in_array($block, $blocks)) {
      return true;
    } else {
      return false;
    }
  }


  public function fetch($id, $signature = '')
  {

    global $langs;

    dol_syslog(get_class($this)."::fetch id=".$id, LOG_DEBUG);

    if (empty($id) && empty($signature))
    {
      $this->error = 'BadParameter';
      return -1;
    }

    $langs->load("blockedlog");

    $sql = "SELECT b.rowid, b.signature, b.blockchain, b.tms";
    $sql .= " FROM ".MAIN_DB_PREFIX."blockedlog_authority as b";

    if ($id) $sql .= " WHERE b.rowid = ".$id;
    elseif ($signature)$sql .= " WHERE b.signature = '".$this->db->escape($signature)."'";

    $resql = $this->db->query($sql);
    if ($resql)
    {
      if ($this->db->num_rows($resql))
      {
        $obj = $this->db->fetch_object($resql);

        $this->id = $obj->rowid;
        $this->ref = $obj->rowid;

        $this->signature = $obj->signature;
        $this->blockchain = $obj->blockchain;

        $this->tms = $this->db->jdate($obj->tms);

        return 1;
      } else {
        $this->error = $langs->trans("RecordNotFound");
        return 0;
      }
    } else {
      $this->error = $this->db->error();
      return -1;
    }
  }

  public function create($user)
  {

    global $conf, $langs, $hookmanager;

    $langs->load('blockedlog');

    $error = 0;

    dol_syslog(get_class($this).'::create', LOG_DEBUG);

    $this->db->begin();

    $sql = "INSERT INTO ".MAIN_DB_PREFIX."blockedlog_authority (";
    $sql .= " signature,";
    $sql .= " blockchain";
    $sql .= ") VALUES (";
    $sql .= "'".$this->db->escape($this->signature)."',";
    $sql .= "'".$this->db->escape($this->blockchain)."'";
    $sql .= ")";

    $res = $this->db->query($sql);
    if ($res)
    {
      $id = $this->db->last_insert_id(MAIN_DB_PREFIX."blockedlog_authority");

      if ($id > 0)
      {
        $this->id = $id;

        $this->db->commit();

        return $this->id;
      } else {
        $this->db->rollback();
        return -2;
      }
    } else {
      $this->error = $this->db->error();
      $this->db->rollback();
      return -1;
    }
  }

  public function update($user)
  {

    global $conf, $langs, $hookmanager;

    $langs->load('blockedlog');

    $error = 0;

    dol_syslog(get_class($this).'::create', LOG_DEBUG);

    $this->db->begin();

    $sql = "UPDATE ".MAIN_DB_PREFIX."blockedlog_authority SET ";
    $sql .= " blockchain='".$this->db->escape($this->blockchain)."'";
    $sql .= " WHERE rowid=".$this->id;

    $res = $this->db->query($sql);
    if ($res)
    {
      $this->db->commit();

      return 1;
    } else {
      $this->error = $this->db->error();
      $this->db->rollback();
      return -1;
    }
  }

  public function syncSignatureWithAuthority()
  {
    global $conf, $langs;

    //TODO create cron task on activation

    if (empty($conf->global->BLOCKEDLOG_AUTHORITY_URL) || empty($conf->global->BLOCKEDLOG_USE_REMOTE_AUTHORITY)) {
      $this->error = $langs->trans('NoAuthorityURLDefined');
      return -2;
    }

    require_once DOL_DOCUMENT_ROOT.'/blockedlog/class/blockedlog.class.php';

    $block_static = new BlockedLog($this->db);

    $blocks = $block_static->getLog('not_certified', 0, 0, 'rowid', 'ASC');

    $signature = $block_static->getSignature();

    foreach ($blocks as &$block) {
      $url = $conf->global->BLOCKEDLOG_AUTHORITY_URL.'/blockedlog/ajax/authority.php?s='.$signature.'&b='.$block->signature;

      $res = file_get_contents($url);
      echo $block->signature.' '.$url.' '.$res.'<br>';
      if ($res === 'blockalreadyadded' || $res === 'blockadded') {
        $block->setCertified();
      } else {
        $this->error = $langs->trans('ImpossibleToContactAuthority ', $url);
        return -1;
      }
    }

    return 1;
  }
}