src/lib/player/player.c

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/*
 *  Empire - A multi-player, client/server Internet based war game.
 *  Copyright (C) 1986-2007, 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 files README, COPYING and CREDITS in the root of the source
 *  tree for related information and legal notices.  It is expected
 *  that future projects/authors will amend these files as needed.
 *
 *  ---
 *
 *  player.c: Main command loop for a player
 * 
 *  Known contributors to this file:
 *     Steve McClure, 2000
 */

#include <config.h>

#include <errno.h>
#include <stdio.h>
#include "com.h"
#include "empio.h"
#include "empthread.h"
#include "file.h"
#include "journal.h"
#include "misc.h"
#include "nat.h"
#include "optlist.h"
#include "player.h"
#include "proto.h"
#include "prototypes.h"
#include "tel.h"


static int command(void);
static int status(void);

struct player *player;

void
player_main(struct player *p)
{
    struct natstr *natp;
    int secs;
    char buf[128];

    p->state = PS_PLAYING;
    player = p;
    time(&player->lasttime);
    time(&player->curup);
    show_motd();
    if (init_nats() < 0) {
        pr("Server confused, try again later\n");
        return;
    }
    natp = getnatp(player->cnum);
    if (!gamehours(player->curup)) {
        pr("Empire hours restriction in force\n");
        if (natp->nat_stat != STAT_GOD)
            return;
    }
    daychange(player->curup);
    if ((player->minleft = getminleft(player->curup, m_m_p_d)) <= 0) {
        pr("Time exceeded today\n");
        return;
    }
    if (natp->nat_stat != STAT_VIS
        && natp->nat_last_login
        && (strcmp(natp->nat_hostaddr, player->hostaddr)
            || strcmp(natp->nat_userid, player->userid))) {
        pr("Last connection from: %s", ctime(&natp->nat_last_login));
        pr("                  to: %s",
           natp->nat_last_login <= natp->nat_last_logout
           ? ctime(&natp->nat_last_logout) : "?");
        pr("                  by: %s@%s\n",
           natp->nat_userid,
           *natp->nat_hostname ? natp->nat_hostname : natp->nat_hostaddr);
    }
    strcpy(natp->nat_userid, player->userid);
    strcpy(natp->nat_hostname, player->hostname);
    strcpy(natp->nat_hostaddr, player->hostaddr);

    time(&natp->nat_last_login);
    putnat(natp);
    journal_login();
    if (natp->nat_flags & NF_INFORM && natp->nat_tgms > 0) {
        if (natp->nat_tgms == 1)
            pr("You have a new telegram waiting ...\n");
        else
            pr("You have %s new telegrams waiting ...\n",
               numstr(buf, natp->nat_tgms));
        natp->nat_tgms = 0;
    }

    while (status()) {
        if (command() == 0 && !player->aborted)
            break;
        player->aborted = 0;
        empth_yield();
    }
    /* #*# I put the following line in to prevent server crash -KHS */
    natp = getnatp(player->cnum);
    /*
     * randomly round up to the nearest minute,
     * charging at least 15 seconds.
     */
    time(&natp->nat_last_logout);
    secs = MAX(natp->nat_last_logout - player->lasttime, 15);
    natp->nat_minused += secs / 60;
    secs = secs % 60;
    if (chance(secs / 60.0))
        natp->nat_minused += 1;
    putnat(natp);
    pr("Bye-bye\n");
    journal_logout();
}

static int
command(void)
{
    char *redir;                /* UTF-8 */
    char scanspace[1024];

    if (getcommand(player->combuf) < 0)
        return 0;
    if (parse(player->combuf, scanspace, player->argp, player->comtail,
              &player->condarg, &redir) < 0) {
        pr("See \"info Syntax\"?\n");
    } else {
        if (dispatch(player->combuf, redir) < 0)
            pr("Try \"list of commands\" or \"info\"\n");
    }
    return 1;
}

static int
status(void)
{
    struct natstr *natp;
    int old_nstat, minute;
    char buf[128];

    if (player->state == PS_SHUTDOWN)
        return 0;
    natp = getnatp(player->cnum);
    if (io_error(player->iop) || io_eof(player->iop)) {
        putnat(natp);
        return 0;
    }
    if (player->dolcost > 100.0)
        pr("That just cost you $%.2f\n", player->dolcost);
    else if (player->dolcost < -100.0)
        pr("You just made $%.2f\n", -player->dolcost);
    natp->nat_money -= roundavg(player->dolcost);
    player->dolcost = 0.0;

    old_nstat = player->nstat;
    player_set_nstat(player, natp);
    if ((old_nstat & MONEY) && !(player->nstat & MONEY))
        pr("You are now broke; industries are on strike.\n");
    if (!(old_nstat & MONEY) && (player->nstat & MONEY))
        pr("You are no longer broke!\n");

    time(&player->curup);
    minute = (player->curup - player->lasttime) / 60;
    if (minute > 0) {
        player->minleft -= minute;
        if (player->minleft <= 0) {
            /*
             * countdown timer "player->minleft" has expired.
             * either day change, or hours restriction
             */
            daychange(player->curup);
            if (!gamehours(player->curup)) {
                pr("Empire hours restriction in force\n");
                if (natp->nat_stat != STAT_GOD) {
                    putnat(natp);
                    return 0;
                }
            }
            player->minleft = getminleft(player->curup, m_m_p_d);
        }
        player->lasttime += minute * 60;
        natp->nat_minused += minute;
    }
    if (natp->nat_stat == STAT_ACTIVE && natp->nat_minused > m_m_p_d) {
        pr("Max minutes per day limit exceeded.\n");
        player->nstat = (player->nstat & ~NORM) | VIS;
    }
    if (player->btused) {
        natp->nat_btu -= player->btused;
        player->btused = 0;
    }
    if (natp->nat_tgms > 0) {
        if (!(natp->nat_flags & NF_INFORM)) {
            if (natp->nat_tgms == 1)
                pr("You have a new telegram waiting ...\n");
            else
                pr("You have %s new telegrams waiting ...\n",
                   numstr(buf, natp->nat_tgms));
            natp->nat_tgms = 0;
        }
    }
    if (natp->nat_ann > 0) {
        if (natp->nat_ann == 1)
            pr("You have a new announcement waiting ...\n");
        else
            pr("You have %s new announcements waiting ...\n",
               numstr(buf, natp->nat_ann));
        natp->nat_ann = 0;
    }
    if (natp->nat_stat == STAT_ACTIVE && (player->nstat & CAP) == 0)
        pr("You lost your capital... better designate one\n");
    putnat(natp);
    if (gamedown() && !player->god) {
        pr("gamedown\n");
        return 0;
    }
    return 1;
}

/*
 * XXX This whole mess should be redone; execute block should
 * start with "exec start", and should end with "exec end".
 * We'll wait until 1.2 I guess.
 */
int
execute(void)
{
    char buf[1024];
    int failed;
    char *p;
    char *redir;                /* UTF-8 */
    char scanspace[1024];

    failed = 0;

    if (player->comtail[1])
        p = player->comtail[1];
    else
        p = getstring("File? ", buf);
    if (p == NULL || *p == '\0')
        return RET_SYN;
    prexec(p);

    while (!failed && status()) {
        player->nstat &= ~EXEC;
        if (recvclient(buf, sizeof(buf)) < 0)
            break;
        if (parse(buf, scanspace, player->argp, player->comtail,
                  &player->condarg, &redir) < 0) {
            failed = 1;
            continue;
        }
        pr("\nExecute : %s\n", buf);
        if (redir) {
            pr("Execute : redirection not supported\n");
            failed = 1;
        } else if (dispatch(buf, NULL) < 0)
            failed = 1;
    }
    if (failed) {
        while (recvclient(buf, sizeof(buf)) >= 0) ;
    }

    pr("Execute : %s\n", failed ? "aborted" : "terminated");
    player->eof = 0;
    return RET_OK;
}

int
show_motd(void)
{
    FILE *motd_fp;
    struct telstr tgm;
    char buf[MAXTELSIZE + 1];   /* UTF-8 */

    if ((motd_fp = fopen(motdfil, "rb")) == NULL) {
        if (errno == ENOENT)
            return RET_OK;
        else {
            pr ("Could not open motd.\n");
            logerror("Could not open motd (%s).\n", motdfil);
            return RET_SYS;
        }
    }
    if (fread(&tgm, sizeof(tgm), 1, motd_fp) != 1) {
        logerror("bad header on login message (motdfil)");
        fclose(motd_fp);
        return RET_FAIL;
    }
    if (tgm.tel_length >= (long)sizeof(buf)) {
        logerror("text length (%ld) is too long for login message (motdfil)", tgm.tel_length);
        fclose(motd_fp);
        return RET_FAIL;
    }
    if (fread(buf, tgm.tel_length, 1, motd_fp) != 1) {
        logerror("bad length %ld on login message", tgm.tel_length);
        fclose(motd_fp);
        return RET_FAIL;
    }
    buf[tgm.tel_length] = 0;
    uprnf(buf);
    fclose(motd_fp);
    return RET_OK;
}

int
quit(void)
{
    player->state = PS_SHUTDOWN;
    return RET_OK;
}

char *
praddr(struct player *p)
{
    return prbuf("%s@%s", p->userid,
                 *p->hostname ? p->hostname : p->hostaddr);
}

---