254 lines
7.4 KiB
C
254 lines
7.4 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2017, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure, Markus Armbruster
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*
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* Empire is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* ---
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*
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* See files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* buy.c: Buy commodities from other nations
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*
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* Known contributors to this file:
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* Dave Pare, 1986
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* Pat Loney, 1992
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* Steve McClure, 1996-2000
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* Markus Armbruster, 2004-2013
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*/
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#include <config.h>
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#include "chance.h"
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#include "commands.h"
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#include "commodity.h"
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#include "item.h"
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#include "news.h"
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#include "optlist.h"
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#include "trade.h"
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/*
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* format: buy <COMMODITY>
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*
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*/
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int
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buy(void)
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{
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struct sctstr sect;
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struct natstr *natp;
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struct comstr comm;
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struct comstr comt;
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struct trdstr tmpt;
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struct ichrstr *ip;
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int qty;
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int o, n;
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coord x, y;
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char *p;
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float bid;
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time_t now;
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double tally;
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double canspend;
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char buf[1024];
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if (!opt_MARKET) {
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pr("The market is disabled.\n");
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return RET_FAIL;
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}
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natp = getnatp(player->cnum);
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ip = whatitem(player->argp[1], "Commodity you want to buy: ");
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if (!ip)
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return RET_SYN;
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display_mark(ip->i_uid, 0);
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pr("\n");
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p = getstarg(player->argp[2], "Which lot are you bidding on: ", buf);
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if (!p)
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return RET_SYN;
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if (*p == 0)
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return RET_SYN;
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o = atoi(p);
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if (o < 0)
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return RET_SYN;
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if (!getcomm(o, &comm) || comm.com_owner == 0) {
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pr("Invalid lot number.\n");
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return RET_OK;
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}
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if (comm.com_type != ip->i_uid) {
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pr("That lot is not of the type you specified.\n");
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return RET_OK;
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}
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if (comm.com_owner == player->cnum) {
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pr("You can't bid on your own lot.\n");
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return RET_OK;
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}
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if (!(p = getstarg(player->argp[3], "How much per unit: ", buf)))
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return RET_SYN;
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bid = atof(p);
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if (bid <= 0)
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return RET_FAIL;
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if (natp->nat_money < bid * comm.com_amount * buytax) {
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pr("This purchase would cost %.2f, %.2f more than you have.\n",
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bid * comm.com_amount * buytax,
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bid * comm.com_amount * buytax - natp->nat_money);
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return RET_FAIL;
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}
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/* check to see if all of the bids that this player has out plus this new bid
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would make him go broke. Ken, I ought to skin you alive for making me code
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this part up.*/
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tally = 0.0;
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for (n = 0; gettrade(n, &tmpt); n++) {
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if (tmpt.trd_maxbidder == player->cnum &&
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tmpt.trd_unitid >= 0 && tmpt.trd_owner != player->cnum) {
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tally += tmpt.trd_price * tradetax;
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}
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}
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for (n = 0; getcomm(n, &comt); n++) {
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if (comt.com_maxbidder == player->cnum &&
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comt.com_owner != 0 && comt.com_owner != player->cnum) {
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tally += comt.com_price * comt.com_amount * buytax;
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}
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}
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canspend = natp->nat_money - tally;
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check_comm_ok(&comm);
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if (bid * comm.com_amount * buytax > canspend) {
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pr("You have overextended yourself in the market\n");
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pr("You can not bid on the current items at that price.\n");
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return RET_OK;
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}
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if (!(p = getstarg(player->argp[4], "destination sector : ", buf)))
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return RET_SYN;
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if (!sarg_xy(p, &x, &y))
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return RET_SYN;
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if (!getsect(x, y, §)) {
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pr("Could not access sector");
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return RET_FAIL;
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}
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if ((sect.sct_type != SCT_WAREH && sect.sct_type != SCT_HARBR) ||
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sect.sct_own != player->cnum) {
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pr("The destination sector is not one of your warehouses.\n");
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return RET_FAIL;
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}
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if (sect.sct_effic < 60) {
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pr("That sector is under construction.\n");
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return RET_FAIL;
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}
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n = sect.sct_item[ip->i_uid];
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qty = comm.com_amount;
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if (qty + n > ITEM_MAX) {
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pr("That sector cannot hold %d more %s. It currently holds %d.\n",
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qty, ip->i_name, n);
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return RET_FAIL;
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}
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if (bid * comm.com_amount > natp->nat_money) {
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pr("You don't have that much to spend!\n");
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return RET_FAIL;
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}
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if (!check_comm_ok(&comm))
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return RET_FAIL;
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if (bid > 0.04 + comm.com_price) {
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comm.com_price = bid;
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time(&now);
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if (comm.com_markettime + MARK_DELAY - now < minutes(5) &&
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comm.com_maxbidder != player->cnum)
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comm.com_markettime = now + minutes(5) - MARK_DELAY;
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comm.com_maxbidder = player->cnum;
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comm.com_x = x;
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comm.com_y = y;
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putcomm(o, &comm);
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pr("Your bid is being considered.\n");
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} else {
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pr("Your bid wasn't high enough (you need to bid at least $0.05 higher\n");
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pr("than the last bid.\n");
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return RET_OK;
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}
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check_market();
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return RET_OK;
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}
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int
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check_market(void)
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{
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struct comstr comm;
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struct sctstr *sect;
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struct natstr *natp;
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int m;
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int n;
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time_t now;
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double gain;
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double price;
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for (n = 0; getcomm(n, &comm); n++) {
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if (comm.com_maxbidder == comm.com_owner || comm.com_owner == 0)
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continue;
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(void)time(&now);
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if (comm.com_markettime + MARK_DELAY > now)
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continue;
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if (CANT_HAPPEN(comm.com_type <= I_NONE || comm.com_type > I_MAX))
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continue;
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sect = getsectp(comm.com_x, comm.com_y);
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m = sect->sct_item[comm.com_type];
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price = comm.com_price * comm.com_amount * buytax;
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gain = comm.com_price * comm.com_amount;
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natp = getnatp(comm.com_maxbidder);
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if (natp->nat_money < price) {
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nreport(comm.com_maxbidder, N_WELCH_DEAL, comm.com_owner, 1);
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wu(0, comm.com_maxbidder,
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"You didn't have enough cash to cover the cost.\n");
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wu(0, comm.com_owner,
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"Sale #%d fell through. Goods remain on the market.\n", n);
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comm.com_maxbidder = comm.com_owner;
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} else if (sect->sct_type != SCT_WAREH
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&& sect->sct_type != SCT_HARBR) {
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wu(0, comm.com_maxbidder,
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"Sector not a warehouse now, sale #%d fell though.\n", n);
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wu(0, comm.com_owner,
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"Sale #%d fell through. Goods remain on the market.\n", n);
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comm.com_maxbidder = comm.com_owner;
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} else if (m + comm.com_amount > ITEM_MAX) {
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wu(0, comm.com_maxbidder,
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"Warehouse full, sale #%d fell though.\n", n);
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wu(0, comm.com_owner,
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"Sale #%d fell through. Goods remain on the market.\n", n);
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comm.com_maxbidder = comm.com_owner;
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} else {
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sect->sct_item[comm.com_type] = m + comm.com_amount;
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putsect(sect);
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nreport(comm.com_owner, N_MAKE_SALE, comm.com_maxbidder, 1);
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wu(0, comm.com_owner, "%s bought %d %s from you for $%.2f\n",
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cname(comm.com_maxbidder), comm.com_amount,
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ichr[comm.com_type].i_name, gain);
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wu(0, comm.com_maxbidder,
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"You just bought %d %s from %s for $%.2f\n",
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comm.com_amount, ichr[comm.com_type].i_name,
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cname(comm.com_owner), price);
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natp->nat_money -= roundavg(price);
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putnat(natp);
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natp = getnatp(comm.com_owner);
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natp->nat_money += roundavg(gain);
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putnat(natp);
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comm.com_owner = 0;
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}
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comm.com_owner = 0;
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putcomm(n, &comm);
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}
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return RET_OK;
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}
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