src/lib/commands/tran.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.
 *
 *  ---
 *
 *  tran.c: Transport nuclear devices and planes
 * 
 *  Known contributors to this file:
 *     Steve McClure, 2000
 *     Markus Armbruster, 2006
 */

#include <config.h>

#include "commands.h"
#include "land.h"
#include "nuke.h"
#include "plane.h"
#include "ship.h"

static int tran_pmap(coord curx, coord cury, char *arg);
static int tran_nmap(coord curx, coord cury, char *arg);
static int tran_nuke(void);
static int tran_plane(void);

int
tran(void)
{
    char *what;
    char buf[1024];

    what = getstarg(player->argp[1], "transport what (nuke or plane): ",
                    buf);
    if (what == 0)
        return RET_SYN;
    if (*what == 'n')
        return tran_nuke();
    else if (*what == 'p')
        return tran_plane();
    return RET_SYN;
}

static int
tran_nuke(void)
{
    coord srcx, srcy;
    coord dstx, dsty;
    int mcost;
    int weight, count;
    int type, dam;
    struct nstr_item nstr;
    struct nukstr nuke;
    struct sctstr sect;
    struct sctstr endsect;

    weight = 0;
    count = 0;
    if (!snxtitem(&nstr, EF_NUKE, player->argp[2]))
        return RET_SYN;
    while (nxtitem(&nstr, &nuke)) {
        if (!player->owner)
            continue;
        type = nuke.nuk_type;
        if (nuke.nuk_plane >= 0) {
            pr("%s is armed and can't be transported\n", prnuke(&nuke));
            return RET_FAIL;
        }
        if (count == 0) {
            srcx = nuke.nuk_x;
            srcy = nuke.nuk_y;
        } else {
            if (nuke.nuk_x != srcx || nuke.nuk_y != srcy) {
                pr("All nukes must be in the same sector.\n");
                return RET_FAIL;
            }
        }
        weight += nchr[type].n_weight;
        ++count;
    }
    if (count == 0) {
        pr("No nukes\n");
        return RET_FAIL;
    }
    if (!getsect(srcx, srcy, &sect) || !player->owner) {
        pr("You don't own %s\n", xyas(srcx, srcy, player->cnum));
        return RET_FAIL;
    }
    if (!military_control(&sect)) {
        pr("Military control required to move nukes.\n");
        return RET_FAIL;
    }
    dam = 0;
    mcost = move_ground(&sect, &endsect, weight,
                        player->argp[3], tran_nmap, 0, &dam);
    if (mcost < 0)
        return 0;

    dstx = endsect.sct_x;
    dsty = endsect.sct_y;
    snxtitem_rewind(&nstr);
    while (nxtitem(&nstr, &nuke)) {
        if (!player->owner)
            continue;
        /* TODO apply dam */
        nuke.nuk_x = dstx;
        nuke.nuk_y = dsty;
        nuke.nuk_mission = 0;
        putnuke(nuke.nuk_uid, &nuke);
    }
    if (mcost > 0)
        pr("Total movement cost = %d\n", mcost);
    else
        pr("No mobility used\n");
    getsect(srcx, srcy, &sect);
    sect.sct_mobil -= mcost;
    if (sect.sct_mobil < 0)
        sect.sct_mobil = 0;
    putsect(&sect);
    return RET_OK;
}

static int
tran_plane(void)
{
    coord srcx, srcy;
    coord dstx, dsty;
    int mcost;
    int weight, count;
    int type, dam;
    struct nstr_item nstr;
    struct plnstr plane;
    struct sctstr sect;
    struct sctstr endsect;

    weight = 0;
    count = 0;
    if (!snxtitem(&nstr, EF_PLANE, player->argp[2]))
        return RET_SYN;
    /*
     * First do some sanity checks: make sure that they are all in the,
     * same sector, not on ships, owned, etc.
     * No one could seriously want to move planes in parallel from
     * several sectors!
     */
    while (nxtitem(&nstr, &plane)) {
        if (!player->owner)
            continue;
        type = plane.pln_type;
        if (plane.pln_ship >= 0) {
            pr("%s is at sea and can't be transported\n", prplane(&plane));
            return RET_FAIL;
        } else if (plane.pln_harden != 0) {
            pr("%s has been hardened and can't be transported\n",
               prplane(&plane));
            return RET_FAIL;
        } else if ((plane.pln_flags & PLN_LAUNCHED) &&
                   (plchr[type].pl_flags & P_O)) {
            pr("%s is in space and can't be transported\n",
               prplane(&plane));
            return RET_FAIL;
        }
        if (count == 0) {
            srcx = plane.pln_x;
            srcy = plane.pln_y;
        } else {
            if (plane.pln_x != srcx || plane.pln_y != srcy) {
                pr("All planes must be in the same sector.\n");
                return RET_FAIL;
            }
        }
        weight += plchr[type].pl_lcm + (plchr[type].pl_hcm * 2);
        ++count;
    }
    if (count == 0) {
        pr("No planes\n");
        return RET_FAIL;
    }
    if (!getsect(srcx, srcy, &sect) || !player->owner) {
        pr("You don't own %s\n", xyas(srcx, srcy, player->cnum));
        return RET_FAIL;
    }
    if (!military_control(&sect)) {
        pr("Military control required to move planes.\n");
        return RET_FAIL;
    }
    dam = 1;
    mcost = move_ground(&sect, &endsect, weight,
                        player->argp[3], tran_pmap, 0, &dam);
    dam /= count;
    if (mcost < 0)
        return 0;

    dstx = endsect.sct_x;
    dsty = endsect.sct_y;
    snxtitem_rewind(&nstr);
    while (nxtitem(&nstr, &plane)) {
        if (!player->owner)
            continue;
        if (dam)
            planedamage(&plane, dam);
        plane.pln_x = dstx;
        plane.pln_y = dsty;
        plane.pln_mission = 0;
        putplane(plane.pln_uid, &plane);
    }
    if (mcost > 0)
        pr("Total movement cost = %d\n", mcost);
    else
        pr("No mobility used\n");
    getsect(srcx, srcy, &sect);
    sect.sct_mobil -= mcost;
    if (sect.sct_mobil < 0)
        sect.sct_mobil = 0;
    putsect(&sect);
    return RET_OK;
}

/*
 * Pretty tacky, but it works.
 * If more commands start doing this, then
 * rewrite map to do the right thing.
 */
/*ARGSUSED*/
static int
tran_pmap(coord curx, coord cury, char *arg)
{
    return display_region_map(0, EF_PLANE, curx, cury, arg);
}

static int
tran_nmap(coord curx, coord cury, char *arg)
{
    return display_region_map(0, EF_NUKE, curx, cury, arg);
}

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