/*
 *
 *   Bacula Director -- User Agent Database Query Commands
 *
 *     Kern Sibbald, December MMI
 *
 *   Version $Id: ua_query.c 5713 2007-10-03 11:36:47Z kerns $
 */
/*
   Bacula® - The Network Backup Solution

   Copyright (C) 2001-2006 Free Software Foundation Europe e.V.

   The main author of Bacula is Kern Sibbald, with contributions from
   many others, a complete list can be found in the file AUTHORS.
   This program is Free Software; you can redistribute it and/or
   modify it under the terms of version two of the GNU General Public
   License as published by the Free Software Foundation and included
   in the file 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 Street, Fifth Floor, Boston, MA
   02110-1301, USA.

   Bacula® is a registered trademark of John Walker.
   The licensor of Bacula is the Free Software Foundation Europe
   (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
   Switzerland, email:ftf@fsfeurope.org.
*/

#include "bacula.h"
#include "dird.h"

extern DIRRES *director;

static POOLMEM *substitute_prompts(UAContext *ua,
                       POOLMEM *query, char **prompt, int nprompt);

/*
 * Read a file containing SQL queries and prompt
 *  the user to select which one.
 *
 *   File format:
 *   #  => comment
 *   :prompt for query
 *   *prompt for subst %1
 *   *prompt for subst %2
 *   ...
 *   SQL statement possibly terminated by ;
 *   :next query prompt
 */
int querycmd(UAContext *ua, const char *cmd)
{
   FILE *fd = NULL;
   POOLMEM *query = get_pool_memory(PM_MESSAGE);
   char line[1000];
   int i, item, len;
   char *prompt[9];
   int nprompt = 0;;
   char *query_file = director->query_file;

   if (!open_client_db(ua)) {
      goto bail_out;
   }
   if ((fd=fopen(query_file, "rb")) == NULL) {
      berrno be;
      ua->error_msg(_("Could not open %s: ERR=%s\n"), query_file,
         be.bstrerror());
      goto bail_out;
   }

   start_prompt(ua, _("Available queries:\n"));
   while (fgets(line, sizeof(line), fd) != NULL) {
      if (line[0] == ':') {
         strip_trailing_junk(line);
         add_prompt(ua, line+1);
      }
   }
   if ((item=do_prompt(ua, "", _("Choose a query"), NULL, 0)) < 0) {
      goto bail_out;
   }
   rewind(fd);
   i = -1;
   while (fgets(line, sizeof(line), fd) != NULL) {
      if (line[0] == ':') {
         i++;
      }
      if (i == item) {
         break;
      }
   }
   if (i != item) {
      ua->error_msg(_("Could not find query.\n"));
      goto bail_out;
   }
   query[0] = 0;
   for (i=0; i<9; i++) {
      prompt[i] = NULL;
   }
   while (fgets(line, sizeof(line), fd) != NULL) {
      if (line[0] == '#') {
         continue;
      }
      if (line[0] == ':') {
         break;
      }
      strip_trailing_junk(line);
      len = strlen(line);
      if (line[0] == '*') {            /* prompt */
         if (nprompt >= 9) {
            ua->error_msg(_("Too many prompts in query, max is 9.\n"));
         } else {
            line[len++] = ' ';
            line[len] = 0;
            prompt[nprompt++] = bstrdup(line+1);
            continue;
         }
      }
      if (*query != 0) {
         pm_strcat(query, " ");
      }
      pm_strcat(query, line);
      if (line[len-1] != ';') {
         continue;
      }
      line[len-1] = 0;             /* zap ; */
      if (query[0] != 0) {
         query = substitute_prompts(ua, query, prompt, nprompt);
         Dmsg1(100, "Query2=%s\n", query);
         if (query[0] == '!') {
            db_list_sql_query(ua->jcr, ua->db, query+1, prtit, ua, 0, VERT_LIST);
         } else if (!db_list_sql_query(ua->jcr, ua->db, query, prtit, ua, 1, HORZ_LIST)) {
            ua->send_msg("%s\n", query);
         }
         query[0] = 0;
      }
   } /* end while */

   if (query[0] != 0) {
      query = substitute_prompts(ua, query, prompt, nprompt);
      Dmsg1(100, "Query2=%s\n", query);
         if (query[0] == '!') {
            db_list_sql_query(ua->jcr, ua->db, query+1, prtit, ua, 0, VERT_LIST);
         } else if (!db_list_sql_query(ua->jcr, ua->db, query, prtit, ua, 1, HORZ_LIST)) {
            ua->error_msg("%s\n", query);
         }
   }

bail_out:
   if (fd) {
      fclose(fd);
   }
   free_pool_memory(query);
   for (i=0; i<nprompt; i++) {
      free(prompt[i]);
   }
   return 1;
}

static POOLMEM *substitute_prompts(UAContext *ua,
                       POOLMEM *query, char **prompt, int nprompt)
{
   char *p, *q, *o;
   POOLMEM *new_query;
   int i, n, len, olen;
   char *subst[9];

   if (nprompt == 0) {
      return query;
   }
   for (i=0; i<9; i++) {
      subst[i] = NULL;
   }
   new_query = get_pool_memory(PM_FNAME);
   o = new_query;
   for (q=query; (p=strchr(q, '%')); ) {
      if (p) {
        olen = o - new_query;
        new_query = check_pool_memory_size(new_query, olen + p - q + 10);
        o = new_query + olen;
         while (q < p) {              /* copy up to % */
            *o++ = *q++;
         }
         p++;
         switch (*p) {
         case '1':
         case '2':
         case '3':
         case '4':
         case '5':
         case '6':
         case '7':
         case '8':
         case '9':
            n = (int)(*p) - (int)'1';
            if (prompt[n]) {
               if (!subst[n]) {
                  if (!get_cmd(ua, prompt[n])) {
                     q += 2;
                     break;
                  }
               }
               len = strlen(ua->cmd);
               p = (char *)malloc(len * 2 + 1);
               db_escape_string(ua->jcr, ua->db, p, ua->cmd, len);
               subst[n] = p;
               olen = o - new_query;
               new_query = check_pool_memory_size(new_query, olen + strlen(p) + 10);
               o = new_query + olen;
               while (*p) {
                  *o++ = *p++;
               }
            } else {
               ua->error_msg(_("Warning prompt %d missing.\n"), n+1);
            }
            q += 2;
            break;
         case '%':
            *o++ = '%';
            q += 2;
            break;
         default:
            *o++ = '%';
            q++;
            break;
         }
      }
   }
   olen = o - new_query;
   new_query = check_pool_memory_size(new_query, olen + strlen(q) + 10);
   o = new_query + olen;
   while (*q) {
      *o++ = *q++;
   }
   *o = 0;
   for (i=0; i<9; i++) {
      if (subst[i]) {
         free(subst[i]);
      }
   }
   free_pool_memory(query);
   return new_query;
}

/*
 * Get general SQL query for Catalog
 */
int sqlquerycmd(UAContext *ua, const char *cmd)
{
   POOL_MEM query(PM_MESSAGE);
   int len;
   const char *msg;

   if (!open_client_db(ua)) {
      return 1;
   }
   *query.c_str() = 0;

   ua->send_msg(_("Entering SQL query mode.\n"
"Terminate each query with a semicolon.\n"
"Terminate query mode with a blank line.\n"));
   msg = _("Enter SQL query: ");
   while (get_cmd(ua, msg)) {
      len = strlen(ua->cmd);
      Dmsg2(400, "len=%d cmd=%s:\n", len, ua->cmd);
      if (len == 0) {
         break;
      }
      if (*query.c_str() != 0) {
         pm_strcat(query, " ");
      }
      pm_strcat(query, ua->cmd);
      if (ua->cmd[len-1] == ';') {
         ua->cmd[len-1] = 0;          /* zap ; */
         /* Submit query */
         db_list_sql_query(ua->jcr, ua->db, query.c_str(), prtit, ua, 1, HORZ_LIST);
         *query.c_str() = 0;         /* start new query */
         msg = _("Enter SQL query: ");
      } else {
         msg = _("Add to SQL query: ");
      }
   }
   ua->send_msg(_("End query mode.\n"));
   return 1;
}