=begin
 * Name: SiSU information Structuring Universe - Structured information, Serialized Units
 * Author: Ralph Amissah
   * http://www.jus.uio.no/sisu
   * http://www.jus.uio.no/sisu/SiSU/download.html

 * Description: modules shared by the different db types, dbi, postgresql, sqlite

 * Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Ralph Amissah

 * License: GPL 2 or later

  Summary of GPL 2

  This program 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.

  This program 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 this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA

  If you have Internet connection, the latest version of the GPL should be
  available at these locations:
    http://www.fsf.org/licenses/gpl.html
    http://www.gnu.org/copyleft/gpl.html
    http://www.jus.uio.no/sisu/gpl2.fsf

  SiSU was first released to the public on January 4th 2005

  SiSU uses:

  *  Standard SiSU markup syntax,
  *  Standard SiSU meta-markup syntax, and the
  *  Standard SiSU object citation numbering and system

  © Ralph Amissah 1997, current 2007.
  All Rights Reserved.

 * Ralph Amissah: ralph@amissah.com
                  ralph.amissah@gmail.com
=end
module SiSU_DB_drop
  class Drop
    def initialize(opt,conn='',sql_type='')
      @opt,@conn,@sql_type=opt,conn,sql_type
    end
    def drop_tables                                                              #% drop all tables
      begin
        case @sql_type
        when /sqlite/
          cascade=''
          commit=@conn.commit
        else
          cascade='CASCADE'
          commit=''
        end
        @conn.do(%{
          DROP TABLE metadata #{cascade};
          DROP TABLE documents #{cascade};
          DROP TABLE endnotes #{cascade};
          DROP TABLE endnotes_asterisk #{cascade};
          DROP TABLE endnotes_plus #{cascade};
          DROP TABLE urls #{cascade};
        })
        commit
      rescue
      end
    end
    def drop_indexes                                                             #% drop all indexes
      #@conn.do(%{
      #  DROP INDEX object_nr ON documents(ocn);
      #  DROP INDEX body ON documents(body);
      #  DROP INDEX clean ON documents(clean);
      #  DROP INDEX lev1 ON documents(lev1);
      #  DROP INDEX lev2 ON documents(lev2);
      #  DROP INDEX lev3 ON documents(lev3);
      #  DROP INDEX lev4 ON documents(lev4);
      #  DROP INDEX lev5 ON documents(lev5);
      #  DROP INDEX lev6 ON documents(lev6);
      #  DROP INDEX endnote_nr ON endnotes(nr);
      #  DROP INDEX endnote ON endnotes(body);
      #  DROP INDEX title ON metadata(title);
      #  DROP INDEX filename ON metadata(filename)
      #  /*
      #  DROP INDEX object_nr ON documents(ocn) CASCADE;
      #  DROP INDEX body ON documents(body) CASCADE;
      #  DROP INDEX clean ON documents(clean) CASCADE;
      #  DROP INDEX lev1 ON documents(lev1) CASCADE;
      #  DROP INDEX lev2 ON documents(lev2) CASCADE;
      #  DROP INDEX lev3 ON documents(lev3) CASCADE;
      #  DROP INDEX lev4 ON documents(lev4) CASCADE;
      #  DROP INDEX lev5 ON documents(lev5) CASCADE;
      #  DROP INDEX lev6 ON documents(lev6) CASCADE;
      #  DROP INDEX endnote_nr ON endnotes(nr) CASCADE;
      #  DROP INDEX endnote ON endnotes(body) CASCADE;
      #  DROP INDEX title ON metadata(title) CASCADE;
      #  DROP INDEX filename ON metadata(filename) CASCADE
      #  */
      #})
    end
    def db_help                                                                  #% help
      puts    %{
        not yet implemented
        init createall
        createtable
        recreate\t(destroy and create)
        createlex\t()
        createmetadata\t()
        import\t(import data)
        index\t(create index)
        droptables\t(where tables made and content imported)
        dropall\t(where tables made, content imported and tables indexed)
      }
    end
  end
end
__END__