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// регистрируем обработчик
AddEventHandler("iblock", "OnAfterIBlockElementAdd", Array("MyClass", "OnAfterIBlockElementUpdateHandler"));
AddEventHandler("iblock", "OnAfterIBlockElementUpdate", Array("MyClass", "OnAfterIBlockElementUpdateHandler"));
AddEventHandler("iblock", "OnBeforeIBlockElementDelete", Array("MyClass", "OnBeforeIBlockElementDeleteHandler"));

class MyClass
{
    // создаем обработчик события "OnAfterIBlockElementUpdate"
    function OnAfterIBlockElementUpdateHandler(&$arFields)
    {
        if($arFields["RESULT"] && $arFields["IBLOCK_ID"] == 62)
        {
         $arSelectFields = array("ID", "NAME", "IBLOCK_ID", "IBLOCK_SECTION_ID", "CREATED_BY", "DATE_ACTIVE_FROM", "DATE_ACTIVE_TO", "DETAIL_TEXT", "PREVIEW_TEXT", "TIMESTAMP_X", 
            "MODIFIED_BY", "USER_NAME", "PROPERTY_PERIOD_TYPE", "PROPERTY_EVENT_LENGTH");

         $dbElements = CIBlockElement::GetList(
            array(),
            array(
               "IBLOCK_ID" => $arFields["IBLOCK_ID"],
               "ID" => $arFields["ID"],
            ),
            false,
            false,
            $arSelectFields
         );
         
         $arElement = $dbElements->GetNext(); 

         if(isset($arElement["PREVIEW_TEXT"]) && !empty($arElement["PREVIEW_TEXT"]))
         {
            $arPassengers = unserialize($arElement["PREVIEW_TEXT"]);
            $passengers = array();
            foreach($arPassengers as $passenger)
            {
               $dbUser = CUser::GetByID($passenger);
               if ($arUser = $dbUser->GetNext())
               {
                  $arPass["ID"] =  $arUser["ID"];
                  $arPass["NAME"] = CUser::FormatName($arParams['NAME_TEMPLATE_WO_NOBR'], $arUser, $bUseLogin);
                  $arPass["FIRST_NAME"] = $arUser["NAME"];
                  $arPass["LAST_NAME"] = $arUser["LAST_NAME"];
                  $arPass["SECOND_NAME"] = $arUser["SECOND_NAME"];
                  $arPass["LOGIN"] = $arUser["LOGIN"];
               }
               $passengers[] = $arPass["LOGIN"].' ('.$arPass["LAST_NAME"].((!empty($arPass["NAME"])) ? ' '.$arPass["NAME"] : '').')';
            }
         }

         if ($arElement["PROPERTY_PERIOD_TYPE_VALUE"] != "NONE")
         {
            $arElement["DATE_ACTIVE_TO"] = Date(
               $GLOBALS["DB"]->DateFormatToPHP(FORMAT_DATETIME),
               MakeTimeStamp($arElement["DATE_ACTIVE_FROM"], FORMAT_DATETIME) + $arElement["PROPERTY_EVENT_LENGTH_VALUE"]
            );
         }

         $arEventFields = array(
             "ACTION_TYPE"             => 'Изменен',
             "ID"             => $arFields["ID"],
             "SECTION_ID"             => $arElement["IBLOCK_SECTION_ID"],
             "NAME"             => $arElement["NAME"],
             "TIMESTAMP_X"             => $arElement["TIMESTAMP_X"],
             // "MODIFIED_BY"             => $modified_by,
             "USER_NAME"             => $arElement["USER_NAME"],
             "DATE_ACTIVE_FROM"             => FormatDate("FULL", strtotime($arElement["DATE_ACTIVE_FROM"])),
             "DATE_ACTIVE_TO"             => FormatDate("FULL", strtotime($arElement["DATE_ACTIVE_TO"])),
             "DETAIL_TEXT"             => $arElement["DETAIL_TEXT"],
             "PASSENGERS"             => implode('   /   ', $passengers)
         );

         CEvent::Send("COURIER_PLANNER_EVENT", "s1", $arEventFields);           
        }
        else
            AddMessage2Log("Ошибка изменения записи ".$arFields["ID"]." (".$arFields["RESULT_MESSAGE"].").");
    }    

    // создаем обработчик события "OnBeforeIBlockElementDelete"
    function OnBeforeIBlockElementDeleteHandler($ID)
    {
      $res = CIBlockElement::GetByID($ID);
      if($arElement = $res->GetNext())  
      {
         if($arElement["IBLOCK_ID"] == 62)
         {
            if(isset($arElement["PREVIEW_TEXT"]) && !empty($arElement["PREVIEW_TEXT"]))
            {
               $arPassengers = unserialize($arElement["PREVIEW_TEXT"]);
               $passengers = array();
               foreach($arPassengers as $passenger)
               {
                  $dbUser = CUser::GetByID($passenger);
                  if ($arUser = $dbUser->GetNext())
                  {
                     $arPass["ID"] =  $arUser["ID"];
                     $arPass["NAME"] = CUser::FormatName($arParams['NAME_TEMPLATE_WO_NOBR'], $arUser, $bUseLogin);
                     $arPass["FIRST_NAME"] = $arUser["NAME"];
                     $arPass["LAST_NAME"] = $arUser["LAST_NAME"];
                     $arPass["SECOND_NAME"] = $arUser["SECOND_NAME"];
                     $arPass["LOGIN"] = $arUser["LOGIN"];
                  }
                  $passengers[] = $arPass["LOGIN"].' ('.$arPass["LAST_NAME"].((!empty($arPass["NAME"])) ? ' '.$arPass["NAME"] : '').')';
               }

            }

            $arEventFields = array(
                "ID"             => $ID,
                "NAME"             => $arElement["NAME"],
                "TIMESTAMP_X"             => $arElement["TIMESTAMP_X"],
                // "MODIFIED_BY"             => $modified_by,
                "USER_NAME"             => $arElement["USER_NAME"],
                "DATE_ACTIVE_FROM"             => FormatDate("FULL", strtotime($arElement["DATE_ACTIVE_FROM"])),
                "DATE_ACTIVE_TO"             => FormatDate("FULL", strtotime($arElement["DATE_ACTIVE_TO"])),
                "DETAIL_TEXT"             => $arElement["DETAIL_TEXT"],
                "PASSENGERS"             => implode('   /   ', $passengers)
            );

            CEvent::Send("COURIER_PLANNER_EVENT", "s1", $arEventFields); 
         }               
      }     
    }        
}