<?php
/*
 +--------------------------------------------------------------------+
 | CiviCRM version 4.5                                                |
 +--------------------------------------------------------------------+
 | Copyright CiviCRM LLC (c) 2004-2014                                |
 +--------------------------------------------------------------------+
 | This file is a part of CiviCRM.                                    |
 |                                                                    |
 | CiviCRM is free software; you can copy, modify, and distribute it  |
 | under the terms of the GNU Affero General Public License           |
 | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
 |                                                                    |
 | CiviCRM 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 Affero General Public License for more details.        |
 |                                                                    |
 | You should have received a copy of the GNU Affero General Public   |
 | License and the CiviCRM Licensing Exception along                  |
 | with this program; if not, contact CiviCRM LLC                     |
 | at info[AT]civicrm[DOT]org. If you have questions about the        |
 | GNU Affero General Public License or the licensing of CiviCRM,     |
 | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
 +--------------------------------------------------------------------+
*/

/**
 *
 * @package CRM
 * @copyright CiviCRM LLC (c) 2004-2014
 * $Id$
 *
 */

/**
 * BAO object for crm_log table
 */
class CRM_Core_BAO_Log extends CRM_Core_DAO_Log {
  static $_processed = NULL;

  /**
   * @param int $id
   * @param string $table
   *
   * @return array|null
   */
  static function &lastModified($id, $table = 'civicrm_contact') {

    $log = new CRM_Core_DAO_Log();

    $log->entity_table = $table;
    $log->entity_id = $id;
    $log->orderBy('modified_date desc');
    $log->limit(1);
    $result = CRM_Core_DAO::$_nullObject;
    if ($log->find(TRUE)) {
      list($displayName, $contactImage) = CRM_Contact_BAO_Contact::getDisplayAndImage($log->modified_id);
      $result = array(
        'id' => $log->modified_id,
        'name' => $displayName,
        'image' => $contactImage,
        'date' => $log->modified_date,
      );
    }
    return $result;
  }

  /**
   * Add log to civicrm_log table
   *
   * @param array $params  array of name-value pairs of log table.
   *
   * @static
   */
  static function add(&$params) {

    $log = new CRM_Core_DAO_Log();
    $log->copyValues($params);
    $log->save();
  }

  /**
   * @param int $contactID
   * @param string $tableName
   * @param int $tableID
   * @param int $userID
   */
  static function register($contactID,
    $tableName,
    $tableID,
    $userID = NULL
  ) {
    if (!self::$_processed) {
      self::$_processed = array();
    }

    if (!$userID) {
      $session = CRM_Core_Session::singleton();
      $userID = $session->get('userID');
    }

    if (!$userID) {
      $api_key = CRM_Utils_Request::retrieve('api_key', 'String', $store, FALSE, NULL, 'REQUEST');

      if ($api_key && strtolower($api_key) != 'null') {
        $userID = CRM_Core_DAO::getFieldValue('CRM_Contact_DAO_Contact', $api_key, 'id', 'api_key');
      }
    }

    if (!$userID) {
      $userID = $contactID;
    }

    if (!$userID) {
      return;
    }

    $log = new CRM_Core_DAO_Log();
    $log->id = NULL;

    if (isset(self::$_processed[$contactID])) {
      if (isset(self::$_processed[$contactID][$userID])) {
        $log->id = self::$_processed[$contactID][$userID];
      }
      self::$_processed[$contactID][$userID] = 1;
    }
    else {
      self::$_processed[$contactID] = array($userID => 1);
    }

    $logData = "$tableName,$tableID";
    if (!$log->id) {
      $log->entity_table  = 'civicrm_contact';
      $log->entity_id     = $contactID;
      $log->modified_id   = $userID;
      $log->modified_date = date("YmdHis");
      $log->data          = $logData;
      $log->save();
    }
    else {
      $query = "
UPDATE civicrm_log
   SET data = concat( data, ':$logData' )
 WHERE id = {$log->id}
";
      CRM_Core_DAO::executeQuery($query);
    }

    self::$_processed[$contactID][$userID] = $log->id;
  }

  /**
   * Get log record count for a Contact
   *
   * @param int $contactID
   *
   * @return int count of log records
   * @access public
   * @static
   */
  static function getContactLogCount($contactID) {
    $query = "SELECT count(*) FROM civicrm_log
                   WHERE civicrm_log.entity_table = 'civicrm_contact' AND civicrm_log.entity_id = {$contactID}";
    return CRM_Core_DAO::singleValueQuery($query);
  }

  /**
   * Function for find out whether to use logging schema entries for contact
   * summary, instead of normal log entries.
   *
   * @return int report id of Contact Logging Report (Summary) / false
   * @access public
   * @static
   */
  static function useLoggingReport() {
    // first check if logging is enabled
    $config = CRM_Core_Config::singleton();
    if (!$config->logging) {
      return FALSE;
    }

    $loggingSchema = new CRM_Logging_Schema();

    if ($loggingSchema->isEnabled()) {
      $params = array('report_id' => 'logging/contact/summary');
      $instance = array();
      CRM_Report_BAO_ReportInstance::retrieve($params, $instance);

      if (!empty($instance) &&
        (empty($instance['permission']) ||
          (!empty($instance['permission']) && CRM_Core_Permission::check($instance['permission']))
        )
      ) {
        return $instance['id'];
      }
    }

    return FALSE;
  }
}