(* Copyright (C) 2000, HELM Team.
 * 
 * This file is part of HELM, an Hypertextual, Electronic
 * Library of Mathematics, developed at the Computer Science
 * Department, University of Bologna, Italy.
 * 
 * HELM 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 2
 * of the License, or (at your option) any later version.
 * 
 * HELM 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 HELM; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 * 
 * For details, see the HELM World-Wide-Web page,
 * http://cs.unibo.it/helm/.
 *)

(*
 *
 *)

open Dbconn;;
open Utility;;
open MathQL;;

(*
 * implementazione della funzione NAME
 *
 * esempio:
 * name "cic:/Algebra/CC_Props/CC_CauchySeq.ind#xpointer(1/1/1)" = CC_CauchySeq
 *)
let func_name value =
 try (
  let i = Str.search_forward (Str.regexp "[^/]*\.") value 0 in
   let s = Str.matched_string value in 
    let retVal = Str.string_before s ((String.length s) - 1) in
     retVal
 ) with
  Not_found -> ""
;;

(*
 *
 *)
let func_theory value =
 ""
;;

(*
 * implementazione delle funzioni dublin core
 *)
let func_dc (value, name) =
 let c = pgc ()
 and p = helm_property_id name in
  pgresult_to_string (c#exec ("select t" ^ p ^ ".att1 from t" ^ p ^ " where " ^ "t" ^ p ^ ".att0 = '" ^ value ^ "'"))
;;

(*
 *
 *)
let apply_func f value =
 match f with
    MQName         -> func_name value
 |  MQTheory       -> func_theory value
 |  MQTitle        -> func_dc (value, "title")
 |  MQContributor  -> func_dc (value, "contributor")
 |  MQCreator      -> func_dc (value, "creator")
 |  MQPublisher    -> func_dc (value, "publisher")
 |  MQSubject      -> func_dc (value, "subject")
 |  MQDescription  -> func_dc (value, "description")
 |  MQDate         -> func_dc (value, "date")
 |  MQType         -> func_dc (value, "type")
 |  MQFormat       -> func_dc (value, "format")
 |  MQIdentifier   -> func_dc (value, "identifier")
 |  MQLanguage     -> func_dc (value, "language")
 |  MQRelation     -> func_dc (value, "relation")
 |  MQSource       -> func_dc (value, "source")
 |  MQCoverage     -> func_dc (value, "coverage")
 |  MQRights       -> func_dc (value, "rights")
 |  MQInstitution  -> func_dc (value, "institution")
 |  MQContact      -> func_dc (value, "contact")
 |  MQFirstVersion -> func_dc (value, "firstversion")
 |  MQModified     -> func_dc (value, "modified")
;;