/*
* Empire - A multi-player, client/server Internet based war game.
* Copyright (C) 1986-2020, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure, Markus Armbruster
*
* Empire 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 3 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, see .
*
* ---
*
* 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.
*
* ---
*
* buy.c: Buy commodities from other nations
*
* Known contributors to this file:
* Dave Pare, 1986
* Pat Loney, 1992
* Steve McClure, 1996-2000
* Markus Armbruster, 2004-2018
*/
#include
#include "chance.h"
#include "commands.h"
#include "commodity.h"
#include "item.h"
#include "news.h"
#include "optlist.h"
#include "trade.h"
/*
* format: buy
*
*/
int
buy(void)
{
struct sctstr sect;
struct natstr *natp;
struct comstr comm;
struct comstr comt;
struct trdstr tmpt;
struct ichrstr *ip;
int qty;
int o, n;
coord x, y;
char *p;
float bid;
time_t now;
double tally;
double canspend;
char buf[1024];
if (!opt_MARKET) {
pr("The market is disabled.\n");
return RET_FAIL;
}
natp = getnatp(player->cnum);
ip = whatitem(player->argp[1], "Commodity you want to buy: ");
if (!ip)
return RET_SYN;
display_mark(ip->i_uid, 0);
pr("\n");
p = getstarg(player->argp[2], "Which lot are you bidding on: ", buf);
if (!p)
return RET_SYN;
if (*p == 0)
return RET_SYN;
o = atoi(p);
if (o < 0)
return RET_SYN;
if (!getcomm(o, &comm) || comm.com_owner == 0) {
pr("Invalid lot number.\n");
return RET_OK;
}
if (comm.com_type != ip->i_uid) {
pr("That lot is not of the type you specified.\n");
return RET_OK;
}
if (comm.com_owner == player->cnum) {
pr("You can't bid on your own lot.\n");
return RET_OK;
}
if (!(p = getstarg(player->argp[3], "How much per unit: ", buf)))
return RET_SYN;
bid = atof(p);
if (bid <= 0)
return RET_FAIL;
if (natp->nat_money < bid * comm.com_amount * buytax) {
pr("This purchase would cost %.2f, %.2f more than you have.\n",
bid * comm.com_amount * buytax,
bid * comm.com_amount * buytax - natp->nat_money);
return RET_FAIL;
}
/* check to see if all of the bids that this player has out plus this new bid
would make him go broke. Ken, I ought to skin you alive for making me code
this part up.*/
tally = 0.0;
for (n = 0; gettrade(n, &tmpt); n++) {
if (!tmpt.trd_owner)
continue;
if (tmpt.trd_maxbidder == player->cnum &&
tmpt.trd_owner != player->cnum) {
tally += tmpt.trd_price * tradetax;
}
}
for (n = 0; getcomm(n, &comt); n++) {
if (comt.com_maxbidder == player->cnum &&
comt.com_owner != 0 && comt.com_owner != player->cnum) {
tally += comt.com_price * comt.com_amount * buytax;
}
}
canspend = natp->nat_money - tally;
check_comm_ok(&comm);
if (bid * comm.com_amount * buytax > canspend) {
pr("You have overextended yourself in the market\n");
pr("You can not bid on the current items at that price.\n");
return RET_OK;
}
if (!(p = getstarg(player->argp[4], "destination sector : ", buf)))
return RET_SYN;
if (!sarg_xy(p, &x, &y))
return RET_SYN;
if (!getsect(x, y, §)) {
pr("Could not access sector");
return RET_FAIL;
}
if ((sect.sct_type != SCT_WAREH && sect.sct_type != SCT_HARBR) ||
sect.sct_own != player->cnum) {
pr("The destination sector is not one of your warehouses.\n");
return RET_FAIL;
}
if (sect.sct_effic < 60) {
pr("That sector is under construction.\n");
return RET_FAIL;
}
n = sect.sct_item[ip->i_uid];
qty = comm.com_amount;
if (qty + n > ITEM_MAX) {
pr("That sector cannot hold %d more %s. It currently holds %d.\n",
qty, ip->i_name, n);
return RET_FAIL;
}
if (bid * comm.com_amount > natp->nat_money) {
pr("You don't have that much to spend!\n");
return RET_FAIL;
}
if (!check_comm_ok(&comm))
return RET_FAIL;
if (bid > 0.04 + comm.com_price) {
comm.com_price = bid;
time(&now);
if (comm.com_markettime + MARK_DELAY - now < minutes(5) &&
comm.com_maxbidder != player->cnum)
comm.com_markettime = now + minutes(5) - MARK_DELAY;
comm.com_maxbidder = player->cnum;
comm.com_x = x;
comm.com_y = y;
putcomm(o, &comm);
pr("Your bid is being considered.\n");
} else {
pr("Your bid wasn't high enough (you need to bid at least $0.05 higher\n");
pr("than the last bid.\n");
return RET_OK;
}
check_market();
return RET_OK;
}
int
check_market(void)
{
struct comstr comm;
struct sctstr *sect;
struct natstr *natp;
int m;
int n;
time_t now;
double gain;
double price;
for (n = 0; getcomm(n, &comm); n++) {
if (comm.com_maxbidder == comm.com_owner || comm.com_owner == 0)
continue;
(void)time(&now);
if (comm.com_markettime + MARK_DELAY > now)
continue;
if (CANT_HAPPEN(comm.com_type <= I_NONE || comm.com_type > I_MAX))
continue;
sect = getsectp(comm.com_x, comm.com_y);
m = sect->sct_item[comm.com_type];
price = comm.com_price * comm.com_amount * buytax;
gain = comm.com_price * comm.com_amount;
natp = getnatp(comm.com_maxbidder);
if (natp->nat_money < price) {
nreport(comm.com_maxbidder, N_WELCH_DEAL, comm.com_owner, 1);
wu(0, comm.com_maxbidder,
"You didn't have enough cash to cover the cost.\n");
wu(0, comm.com_owner,
"Sale #%d fell through. Goods remain on the market.\n", n);
comm.com_maxbidder = comm.com_owner;
} else if (sect->sct_type != SCT_WAREH
&& sect->sct_type != SCT_HARBR) {
wu(0, comm.com_maxbidder,
"Sector not a warehouse now, sale #%d fell though.\n", n);
wu(0, comm.com_owner,
"Sale #%d fell through. Goods remain on the market.\n", n);
comm.com_maxbidder = comm.com_owner;
} else if (m + comm.com_amount > ITEM_MAX) {
wu(0, comm.com_maxbidder,
"Warehouse full, sale #%d fell though.\n", n);
wu(0, comm.com_owner,
"Sale #%d fell through. Goods remain on the market.\n", n);
comm.com_maxbidder = comm.com_owner;
} else {
sect->sct_item[comm.com_type] = m + comm.com_amount;
putsect(sect);
nreport(comm.com_owner, N_MAKE_SALE, comm.com_maxbidder, 1);
wu(0, comm.com_owner, "%s bought %d %s from you for $%.2f\n",
cname(comm.com_maxbidder), comm.com_amount,
ichr[comm.com_type].i_name, gain);
wu(0, comm.com_maxbidder,
"You just bought %d %s from %s for $%.2f\n",
comm.com_amount, ichr[comm.com_type].i_name,
cname(comm.com_owner), price);
natp->nat_money -= roundavg(price);
putnat(natp);
natp = getnatp(comm.com_owner);
natp->nat_money += roundavg(gain);
putnat(natp);
comm.com_owner = 0;
}
comm.com_owner = 0;
putcomm(n, &comm);
}
return RET_OK;
}