source: trunk/athena/bin/olc/clients/tty/t_topic.c @ 2072

/*
 * This file is part of the OLC On-Line Consulting System.
 * It contains procedures for exectuting olc commands.
 *
 *      Win Treese
 *      Dan Morgan
 *      Bill Saphir
 *      MIT Project Athena
 *
 *      Ken Raeburn
 *      MIT Information Systems
 *
 *      Tom Coppeto
 *      MIT Project Athena
 *
 *      Copyright (c) 1989 by the Massachusetts Institute of Technology
 *
 *      $Source: /afs/dev.mit.edu/source/repository/athena/bin/olc/clients/tty/t_topic.c,v $
 *      $Author: tjcoppet $
 */


#ifndef lint
static char rcsid[]= "$Header: /afs/dev.mit.edu/source/repository/athena/bin/olc/clients/tty/t_topic.c,v 1.3 1989-08-22 13:55:55 tjcoppet Exp $";
#endif

#include <olc/olc.h>
#include <olc/olc_tty.h>

/*
 * Function:    input_topic() reads a question topic from the standard input.
 * Arguments:   topic:  Space to put the topic.
 * Returns:     ERRCODE
 */

ERRCODE
t_input_topic(Request,topic,flags)
     REQUEST *Request;
     char *topic;
     int flags;
{
  char buf[LINE_LENGTH];        
  char file[NAME_LENGTH];
  char *bufP;                   
  int loop = 0;
  int status;
  int fudge = 0;

  *buf = '\0';
  
  if(flags)
    {
      printf("Please type a one-word topic for your question.");
      printf(" Type ? for a list of\n");
      printf("available topics or ^D to exit.\n\n");
    }

  if(*topic != '\0');
     fudge = 1;

  while(loop < 5)
    {
      *buf = '\0';
      while (*buf == '\0') 
        {
          bufP = buf;
          if(!fudge)
             (void) get_prompted_input("Topic: ", buf);
          else
           {
             strcpy(buf,topic);
             fudge = 0;
           } 

          if (*bufP == '\0') 
            {
              *buf = '\0';
              continue;
            }
          while(*bufP == '\\')
            ++bufP;
          (void) strcpy(topic, bufP);
          uncase(topic);
        }
      
      if(string_eq(topic,"?"))
        {
          make_temp_name(file);
          t_list_topics(Request,file,TRUE);
          unlink(file);
          continue;
        }

      if(string_eq(topic,"help"))
        {
          printf("Choose a topic, type '?' for a list of available topics.\n");
          continue;
        }

      if((status = t_verify_topic(Request,topic)) == SUCCESS)
        return(SUCCESS);
      
      if(status == INVALID_TOPIC)
        printf("Type '?' for a list of topics.\n");
      else
        return(ERROR);
      
      ++loop;
    }

  return(ERROR);
}


ERRCODE
t_list_topics(Request, file, display)
     REQUEST *Request;
     char *file;
     int display;
{
  int status;

  status = OListTopics(Request,file);
  switch(status)
    {
    case SUCCESS:
      if(display)
        display_file(file,TRUE);
      break;

    case ERROR:
      fprintf(stderr,"Cannot list OLC topics\n");
      status = ERROR;
      break;

    default:
      status = handle_response(status, Request);
      break;
    }
  return(status);
}

ERRCODE
t_verify_topic(Request, topic)
     REQUEST *Request;
     char *topic;
{
  int status;

  status = OVerifyTopic(Request,topic);
  switch(status)
    {
    case SUCCESS:
      break;

    case INVALID_TOPIC:
      printf("%s is not a valid topic.\n",topic);
      break;

    default:
      status = handle_response(status, Request);
      break;
    } 
  return(status);
}


ERRCODE
t_get_topic(Request, topic)
     REQUEST *Request;
     char *topic;
{
  int status;

  status = OGetTopic(Request,topic);
  
  switch(status)
    {
    case SUCCESS:
      printf("Current topic is \"%s\".\n", topic);
      status = SUCCESS;
      break;

    case PERMISSION_DENIED:
      fprintf(stderr, "You are not allowed to see %s's (%d) topic.\n",
              Request->target.username, Request->target.instance);
      status = ERROR;
      break;

    case FAILURE:
      fprintf(stderr, "Unable to get topic.\n");
      status = ERROR;
      break;

    default:
      status = handle_response(status, Request);
      break;
    }
  
  return(status);
}


ERRCODE
t_change_topic(Request,topic)
     REQUEST *Request;
     char *topic;
{
  int status;

  status = OChangeTopic(Request,topic);
  switch(status)
    {
    case SUCCESS:
      printf("Topic changed to %s\n",topic);
      break;

    case PERMISSION_DENIED:
      fprintf(stderr, "You are not allowed to change %s's (%d) topic.\n",
              Request->target.username, Request->target.instance);
      status = ERROR;
      break;

    case ERROR:
      fprintf(stderr,
              "Topic \"%s\" is not defined. Try 'topic ?' (it won't bite)\n",
              topic);
      break;

    default:
      status = handle_response(status, Request);
      break;
    }
  
  return(status);
}