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(*
Copyright © 2011, 2012 MLstate

This file is part of OPA.

OPA is free software: you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License, version 3, as published by
the Free Software Foundation.

OPA 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
along with OPA. If not, see <http://www.gnu.org/licenses/>.
*)

module Q = QmlAst

module BSLDbGen = QmlDbGen.DbGenByPass.BSLDbGenAlphaOpa
module DbGen = QmlDbGen.DbGen ( BSLDbGen )

let clean_code schema code =
  List.filter
    (function
     | Q.Database (_, _, _, opt) when opt.Q.Db.backend = `db3 -> false
     | Q.NewDbValue (_, (
                       Q.Db.Db_TypeDecl (Q.Db.Decl_fld prefix::_, _)
                     | Q.Db.Db_Default (Q.Db.Decl_fld prefix::_, _)
                     | Q.Db.Db_Alias (Q.Db.Decl_fld prefix::_, _)
                     | Q.Db.Db_Constraint (Q.Db.Decl_fld prefix::_, _)
                     | Q.Db.Db_Virtual (Q.Db.Decl_fld prefix::_, _))
                    ) when let open QmlDbGen.Schema in
       (get_node schema [Q.Db.FldKey prefix]).database.options.Q.Db.backend = `db3
           -> false
     | _ -> true
    ) code

let process_code gamma annotmap schema code alpha_opt =
  (* 1°: Remove db3 database declaration and db3 path declaration *)
  let code = clean_code schema code in

  (* 2°: generate database accessors from the schema *)
  let dbinfo, gamma, annotmap_opt, dbgen_init_code, dbgen_accessors_code =
    DbGen.initialize
      ~annotmap:(Some annotmap)
      ~valinitial_env:alpha_opt
      gamma
      schema
  in

  (* 3°: adding annotmap of dbGen code *)
  let annotmap =
    Option.default_map annotmap
      (fun am -> QmlAnnotMap.merge (QmlTypes.process_typenames_annotmap ~gamma:gamma am)
         annotmap) annotmap_opt
  in

  (* 4°: inserting dbgen code *)
  let code =
    dbgen_init_code
    @ dbgen_accessors_code
    @ code
  in

  dbinfo, gamma, annotmap, code
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