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 $db;
 
  public $id;
 
  public $signature = '';
 
  public $blockchain = '';
 
  public $tms = 0;
 
  public $error;
 
  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 = '';
 
    if (is_array($blocks)) {
      foreach ($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=".((int) $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 = ".((int) $id);
    } elseif ($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=".((int) $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();
 
    if (is_array($blocks)) {
      foreach ($blocks as &$block) {
        $url = $conf->global->BLOCKEDLOG_AUTHORITY_URL.'/blockedlog/ajax/authority.php?s='.$signature.'&b='.$block->signature;
 
        $res = getURLContent($url);
        echo $block->signature.' '.$url.' '.$res['content'].'<br>';
        if ($res['content'] === 'blockalreadyadded' || $res['content'] === 'blockadded') {
          $block->setCertified();
        } else {
          $this->error = $langs->trans('ImpossibleToContactAuthority ', $url);
          return -1;
        }
      }
    }
 
    return 1;
  }
}