------------------------------------------------------------------------------
--                                                                          --
--                   GNOGA - The GNU Omnificent GUI for Ada                 --
--                                                                          --
--              G N O G A . G U I . P L U G I N S . J Q U E R Y             --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--                                                                          --
--                     Copyright (C) 2014 David Botton                      --
--                                                                          --
--  This library is free software;  you can redistribute it and/or modify   --
--  it under terms of the  GNU General Public License  as published by the  --
--  Free Software  Foundation;  either version 3,  or (at your  option) any --
--  later version. This library 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.                    --
--                                                                          --
--  As a special exception under Section 7 of GPL version 3, you are        --
--  granted additional permissions described in the GCC Runtime Library     --
--  Exception, version 3.1, as published by the Free Software Foundation.   --
--                                                                          --
--  You should have received a copy of the GNU General Public License and   --
--  a copy of the GCC Runtime Library Exception along with this program;    --
--  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see   --
--  <http://www.gnu.org/licenses/>.                                         --
--                                                                          --
--  As a special exception, if other files instantiate generics from this   --
--  unit, or you link this unit with other files to produce an executable,  --
--  this  unit  does not  by itself cause  the resulting executable to be   --
--  covered by the GNU General Public License. This exception does not      --
--  however invalidate any other reasons why the executable file might be   --
--  covered by the  GNU Public License.                                     --
--                                                                          --
--  For more information please go to http://www.gnoga.com                  --
------------------------------------------------------------------------------

with Ada.Exceptions;

with Gnoga.Server.Connection;

package body Gnoga.Gui.Plugin.jQuery is
   function Gnoga_Var
     (Object : jQuery_Type)
      return String;
   --  Return the JavaScript variable containing the jQuery result

   ---------------
   -- Gnoga_Var --
   ---------------

   function Gnoga_Var
     (Object : jQuery_Type)
      return String
   is
   begin
      return "gnoga['" & Object.Unique_ID & "']";
   end Gnoga_Var;

   ----------------
   -- Initialize --
   ----------------

   overriding procedure Initialize (Object : in out jQuery_Type) is
   begin
      Object.Unique_ID := Gnoga.Server.Connection.New_GID;
   end Initialize;

   --------------
   -- Finalize --
   --------------

   overriding procedure Finalize (Object : in out jQuery_Type) is
   begin
      if not Gnoga.Server.Connection.Shutting_Down then
         if Object.Connection_ID /= Gnoga.Types.No_Connection then
            Gnoga.Server.Connection.Execute_Script (Object.Connection_ID, "delete " & Gnoga_Var (Object) & ";");
         end if;
      end if;

      Object.Connection_ID := Gnoga.Types.No_Connection;
   exception
      when E : Gnoga.Server.Connection.Connection_Error =>
         --  Socket error to browser
         Log ("Connection" & Image (Object.Connection_ID) & " socket error to browser.");
         Log (From_UTF_8 (Ada.Exceptions.Exception_Information (E)));
      when E : others =>
         Log ("Error finalizing jQuery Object - " & Gnoga_Var (Object));
         Log (From_UTF_8 (Ada.Exceptions.Exception_Information (E)));
   end Finalize;

   ------------
   -- jQuery --
   ------------

   procedure jQuery
     (Object : in out jQuery_Type;
      ID     : in     Gnoga.Types.Connection_ID;
      Query  : in     String)
   is
   begin
      Object.Connection_ID := ID;

      Gnoga.Server.Connection.Execute_Script (Object.Connection_ID, Gnoga_Var (Object) & "=$(" & Query & ");");
   end jQuery;

   -------------
   -- Execute --
   -------------

   procedure Execute
     (Object : in out jQuery_Type;
      Method : in     String)
   is
   begin
      Gnoga.Server.Connection.Execute_Script (Object.Connection_ID, Gnoga_Var (Object) & "." & Method);
   end Execute;

   -------------
   -- Execute --
   -------------

   function Execute
     (Object : jQuery_Type;
      Method : String)
      return String
   is
   begin
      return Gnoga.Server.Connection.Execute_Script (Object.Connection_ID, Gnoga_Var (Object) & "." & Method);
   end Execute;

end Gnoga.Gui.Plugin.jQuery;