/*      $OpenBSD: save.c,v 1.14 2015/11/30 08:19:25 tb Exp $    */

/*
 * Copyright (c) 1980, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <ctype.h>
#include <limits.h>
#include <errno.h>
#include "back.h"

static const char confirm[] = "Are you sure you want to leave now?";
static const char prompt[] = "Enter a file name:  ";
static const char exist1[] = "The file '";
static const char exist2[] =
        "' already exists.\nAre you sure you want to use this file?";
static const char cantuse[] = "\nCan't use ";
static const char saved[] = "This game has been saved on the file '";
static const char type[] = "'.\nType \"backgammon -s ";
static const char rec[] = "\" to recover your game.\n\n";
static const char cantrec[] = "Can't recover file:  ";

void
save(int n)
{
        int     fdesc;
        char   *fs;
        char    fname[PATH_MAX];
        int     r, c, i;

        if (n) {
                move(20, 0);
                clrtobot();
                addstr(confirm);
                if (!yorn(0))
                        return;
        }
        cflag = 1;
        for (;;) {
                addstr(prompt);
                fs = fname;
                while ((i = readc()) != '\n') {
                        if (i == KEY_BACKSPACE || i == 0177) {
                                if (fs > fname) {
                                        fs--;
                                        getyx(stdscr, r, c);
                                        move(r, c - 1);
                                } else
                                        beep();
                                continue;
                        }
                        if (fs - fname < sizeof(fname) - 1) {
                                if (isascii(i)) {
                                        *fs = i;
                                        addch(*fs++);
                                } else
                                        beep();
                        } else
                                beep();
                }
                *fs = '\0';
                if ((fdesc = open(fname, O_RDWR)) == -1 && errno == ENOENT) {
                        if ((fdesc = open(fname,
                                          O_CREAT | O_TRUNC | O_WRONLY,
                                          0600)) != -1)
                                break;
                }
                if (fdesc != -1) {
                        move(18, 0);
                        clrtobot();
                        printw("%s%s%s", exist1, fname, exist2);
                        cflag = 0;
                        close(fdesc);
                        if (yorn(0)) {
                                unlink(fname);
                                fdesc = open(fname,
                                             O_CREAT | O_TRUNC | O_WRONLY,
                                             0600);
                                break;
                        } else {
                                cflag = 1;
                                continue;
                        }
                }
                printw("%s%s.\n", cantuse, fname);
                cflag = 1;
        }
        write(fdesc, board, sizeof(board));
        write(fdesc, off, sizeof(off));
        write(fdesc, in, sizeof(in));
        write(fdesc, dice, sizeof(dice));
        write(fdesc, &cturn, sizeof(cturn));
        write(fdesc, &dflag, sizeof(dflag));
        write(fdesc, &dlast, sizeof(dlast));
        write(fdesc, &pnum, sizeof(pnum));
        write(fdesc, &rscore, sizeof(rscore));
        write(fdesc, &wscore, sizeof(wscore));
        write(fdesc, &gvalue, sizeof(gvalue));
        write(fdesc, &raflag, sizeof(raflag));
        close(fdesc);
        move(18, 0);
        printw("%s%s%s%s%s", saved, fname, type, fname, rec);
        clrtobot();
        getout(0);
}

void
recover(const char *s)
{
        int     fdesc;

        if ((fdesc = open(s, O_RDONLY)) == -1)
                norec(s);
        read(fdesc, board, sizeof(board));
        read(fdesc, off, sizeof(off));
        read(fdesc, in, sizeof(in));
        read(fdesc, dice, sizeof(dice));
        read(fdesc, &cturn, sizeof(cturn));
        read(fdesc, &dflag, sizeof(dflag));
        read(fdesc, &dlast, sizeof(dlast));
        read(fdesc, &pnum, sizeof(pnum));
        read(fdesc, &rscore, sizeof(rscore));
        read(fdesc, &wscore, sizeof(wscore));
        read(fdesc, &gvalue, sizeof(gvalue));
        read(fdesc, &raflag, sizeof(raflag));
        close(fdesc);
        rflag = 1;
}

void
norec(const char *s)
{
        const char   *c;

        addstr(cantrec);
        c = s;
        while (*c != '\0')
                addch(*c++);
        getout(0);
}