/*
   Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.

   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; version 2 of the License.

   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 St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#include "my_global.h"
#include "trigger_creation_ctx.h"
#include "sql_db.h" // get_default_db_collation()
#include "log.h"

Trigger_creation_ctx *
Trigger_creation_ctx::create(THD *thd,
                             const LEX_CSTRING &db_name,
                             const LEX_CSTRING &table_name,
                             const LEX_STRING &client_cs_name,
                             const LEX_STRING &connection_cl_name,
                             const LEX_STRING &db_cl_name)
{
  const CHARSET_INFO *client_cs;
  const CHARSET_INFO *connection_cl;
  const CHARSET_INFO *db_cl;

  bool invalid_creation_ctx= FALSE;

  if (resolve_charset(client_cs_name.str,
                      thd->variables.character_set_client,
                      &client_cs))
  {
    sql_print_warning("Trigger for table '%s'.'%s': "
                      "invalid character_set_client value (%s).",
                      (const char *) db_name.str,
                      (const char *) table_name.str,
                      (const char *) client_cs_name.str);

    invalid_creation_ctx= TRUE;
  }

  if (resolve_collation(connection_cl_name.str,
                        thd->variables.collation_connection,
                        &connection_cl))
  {
    sql_print_warning("Trigger for table '%s'.'%s': "
                      "invalid collation_connection value (%s).",
                      (const char *) db_name.str,
                      (const char *) table_name.str,
                      (const char *) connection_cl_name.str);

    invalid_creation_ctx= TRUE;
  }

  if (resolve_collation(db_cl_name.str, NULL, &db_cl))
  {
    sql_print_warning("Trigger for table '%s'.'%s': "
                      "invalid database_collation value (%s).",
                      (const char *) db_name.str,
                      (const char *) table_name.str,
                      (const char *) db_cl_name.str);

    invalid_creation_ctx= TRUE;
  }

  if (invalid_creation_ctx)
  {
    push_warning_printf(thd,
                        Sql_condition::SL_WARNING,
                        ER_TRG_INVALID_CREATION_CTX,
                        ER(ER_TRG_INVALID_CREATION_CTX),
                        (const char *) db_name.str,
                        (const char *) table_name.str);
  }

  /*
    If we failed to resolve the database collation, load the default one
    from the disk.
  */

  if (!db_cl)
    db_cl= get_default_db_collation(thd, db_name.str);

  return new Trigger_creation_ctx(client_cs, connection_cl, db_cl);
}