/*
 *  Empire - A multi-player, client/server Internet based war game.
 *  Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
 *                           Ken Stevens, Steve McClure
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  ---
 *
 *  See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
 *  related information and legal notices. It is expected that any future
 *  projects/authors will amend these files as needed.
 *
 *  ---
 *
 *  getele.c: Read a telegram from a file or stdin and send it to a country
 * 
 *  Known contributors to this file:
 *    
 */

#include <ctype.h>
#include "misc.h"
#include "player.h"
#include "tel.h"
#include "prototypes.h"

static int tilde_escape(s_char *s, s_char c);

int
getele(s_char *nation, s_char *buf)
{
    register s_char *bp;
    register int len;
    register int c;
    s_char buffer[MAXTELSIZE + 2];
    s_char left[MAXTELSIZE + 2];

    pr("Enter telegram for %s\n", nation);
    pr("undo last line with ~u, print with ~p, abort with ~q, end with ^D or .\n");
    bp = buf;
    while (!player->aborted) {
	sprintf(left, "%4d left: ", (int)(buf + MAXTELSIZE - bp));
	buffer[0] = 0;
	if (prmptrd(left, buffer, MAXTELSIZE - 2) <= 0)
	    break;
	if (tilde_escape(buffer, 'q'))
	    return -1;
	if (tilde_escape(buffer, 'u')) {
	    if (bp == buf) {
		pr("No more lines to undo\n");
		continue;
	    }
	    pr("Last line deleted.\n");
	    for (bp -= 2; bp > buf && *bp != '\n'; --bp) ;
	    if (bp > buf)
		*(++bp) = 0;
	    else
		bp = buf;
	    continue;
	}
	if (tilde_escape(buffer, 'p')) {
	    pr("This is what you have written so far:\n");
	    pr("%s", buf);
	    continue;
	}
	if (buffer[0] == '.' && ((buffer[1] == 0)
				 || (buffer[1] == '\n')
				 || (buffer[1] == '\r')))
	    break;
	len = strlen(buffer);
	buffer[len++] = '\n';
	buffer[len] = 0;
	if (len + (bp - buf) > MAXTELSIZE)
	    pr("Too long.  Try that last line again...\n");
	else {
	    if (buffer[0] == '>')	/* forgery attempt? */
		buffer[0] = '?';	/* foil it */
	    (void)strcpy(bp, buffer);
	    bp += len;
	}
    }
    if (player->aborted)
	return -1;
    len = bp - buf;
    buf[len] = 0;
    /* Get rid of non-ASCII and control characters.  */
    for (bp = buf; 0 != (c = *bp); bp++) {
	if (isascii(c) && (isprint(c) || isspace(c)))
	    continue;
	*bp = '?';
    }
    return len;
}

static int
tilde_escape(s_char *s, s_char c)
{
    if (s[0] == '~' && s[1] == c &&
	((s[2] == 0) || (s[2] == '\n') || (s[2] == '\r')))
	return 1;
    return 0;
}