1 /*
2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
5 *
6 * Empire is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 *
19 * ---
20 *
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
24 *
25 * ---
26 *
27 * buy.c: Buy commodities from other nations
28 *
29 * Known contributors to this file:
30 * Dave Pare, 1986
31 * Pat Loney, 1992
32 * Steve McClure, 1996-2000
33 * Markus Armbruster, 2004-2021
34 */
35
36 #include <config.h>
37
38 #include "chance.h"
39 #include "commands.h"
40 #include "commodity.h"
41 #include "item.h"
42 #include "news.h"
43 #include "optlist.h"
44 #include "trade.h"
45
46 /*
47 * format: buy <COMMODITY>
48 *
49 */
50 int
c_buy(void)51 c_buy(void)
52 {
53 struct sctstr sect;
54 struct natstr *natp;
55 struct comstr comm;
56 struct comstr comt;
57 struct trdstr tmpt;
58 struct ichrstr *ip;
59 int qty;
60 int o, n;
61 coord x, y;
62 char *p;
63 float bid;
64 time_t now;
65 double tally;
66 double canspend;
67 char buf[1024];
68
69 if (!opt_MARKET) {
70 pr("The market is disabled.\n");
71 return RET_FAIL;
72 }
73 natp = getnatp(player->cnum);
74 ip = whatitem(player->argp[1], "Commodity you want to buy: ");
75 if (!ip)
76 return RET_SYN;
77 display_mark(ip->i_uid, 0);
78 pr("\n");
79 p = getstarg(player->argp[2], "Which lot are you bidding on: ", buf);
80 if (!p)
81 return RET_SYN;
82 if (*p == 0)
83 return RET_SYN;
84 o = atoi(p);
85 if (o < 0)
86 return RET_SYN;
87 if (!getcomm(o, &comm) || comm.com_owner == 0) {
88 pr("Invalid lot number.\n");
89 return RET_OK;
90 }
91 if (comm.com_type != ip->i_uid) {
92 pr("That lot is not of the type you specified.\n");
93 return RET_OK;
94 }
95 if (comm.com_owner == player->cnum) {
96 pr("You can't bid on your own lot.\n");
97 return RET_OK;
98 }
99 if (!(p = getstarg(player->argp[3], "How much per unit: ", buf)))
100 return RET_SYN;
101 bid = atof(p);
102 if (bid <= 0)
103 return RET_FAIL;
104 if (!check_comm_ok(&comm))
105 return RET_FAIL;
106 if (natp->nat_money < bid * comm.com_amount * buytax) {
107 pr("This purchase would cost %.2f, %.2f more than you have.\n",
108 bid * comm.com_amount * buytax,
109 bid * comm.com_amount * buytax - natp->nat_money);
110 return RET_FAIL;
111 }
112 /* check to see if all of the bids that this player has out plus this new bid
113 would make him go broke. Ken, I ought to skin you alive for making me code
114 this part up.*/
115 tally = 0.0;
116 for (n = 0; gettrade(n, &tmpt); n++) {
117 if (!tmpt.trd_owner)
118 continue;
119 if (tmpt.trd_maxbidder == player->cnum &&
120 tmpt.trd_owner != player->cnum) {
121 tally += tmpt.trd_price * tradetax;
122 }
123 }
124 for (n = 0; getcomm(n, &comt); n++) {
125 if (comt.com_maxbidder == player->cnum &&
126 comt.com_owner != 0 && comt.com_owner != player->cnum) {
127 tally += comt.com_price * comt.com_amount * buytax;
128 }
129 }
130 canspend = natp->nat_money - tally;
131 if (bid * comm.com_amount * buytax > canspend) {
132 pr("You have overextended yourself in the market\n");
133 pr("You can not bid on the current items at that price.\n");
134 return RET_OK;
135 }
136 if (!(p = getstarg(player->argp[4], "destination sector : ", buf)))
137 return RET_SYN;
138 if (!sarg_xy(p, &x, &y))
139 return RET_SYN;
140 if (!getsect(x, y, §)) {
141 pr("Could not access sector");
142 return RET_FAIL;
143 }
144 if (!check_comm_ok(&comm))
145 return RET_FAIL;
146 if ((sect.sct_type != SCT_WAREH && sect.sct_type != SCT_HARBR) ||
147 sect.sct_own != player->cnum) {
148 pr("The destination sector is not one of your warehouses.\n");
149 return RET_FAIL;
150 }
151 if (sect.sct_effic < 60) {
152 pr("That sector is under construction.\n");
153 return RET_FAIL;
154 }
155 n = sect.sct_item[ip->i_uid];
156 qty = comm.com_amount;
157 if (qty + n > ITEM_MAX) {
158 pr("That sector cannot hold %d more %s. It currently holds %d.\n",
159 qty, ip->i_name, n);
160 return RET_FAIL;
161 }
162 if (bid * comm.com_amount > natp->nat_money) {
163 pr("You don't have that much to spend!\n");
164 return RET_FAIL;
165 }
166 if (bid > 0.04 + comm.com_price) {
167 comm.com_price = bid;
168 time(&now);
169 if (comm.com_markettime + MARK_DELAY - now < minutes(5) &&
170 comm.com_maxbidder != player->cnum)
171 comm.com_markettime = now + minutes(5) - MARK_DELAY;
172 comm.com_maxbidder = player->cnum;
173 comm.com_x = x;
174 comm.com_y = y;
175 putcomm(o, &comm);
176 pr("Your bid is being considered.\n");
177 } else {
178 pr("Your bid wasn't high enough (you need to bid at least $0.05 higher\n");
179 pr("than the last bid.\n");
180 return RET_OK;
181 }
182
183 check_market();
184
185 return RET_OK;
186 }
187
188 int
check_market(void)189 check_market(void)
190 {
191 struct comstr comm;
192 struct sctstr *sect;
193 struct natstr *natp;
194 int m;
195 int n;
196 time_t now;
197 double gain;
198 double price;
199
200 for (n = 0; getcomm(n, &comm); n++) {
201 if (comm.com_maxbidder == comm.com_owner || comm.com_owner == 0)
202 continue;
203 (void)time(&now);
204 if (comm.com_markettime + MARK_DELAY > now)
205 continue;
206 if (CANT_HAPPEN(comm.com_type <= I_NONE || comm.com_type > I_MAX))
207 continue;
208 sect = getsectp(comm.com_x, comm.com_y);
209 m = sect->sct_item[comm.com_type];
210
211 price = comm.com_price * comm.com_amount * buytax;
212 gain = comm.com_price * comm.com_amount;
213
214 natp = getnatp(comm.com_maxbidder);
215 if (natp->nat_money < price) {
216 nreport(comm.com_maxbidder, N_WELCH_DEAL, comm.com_owner, 1);
217 wu(0, comm.com_maxbidder,
218 "You didn't have enough cash to cover the cost.\n");
219 wu(0, comm.com_owner,
220 "Sale #%d fell through. Goods remain on the market.\n", n);
221 comm.com_maxbidder = comm.com_owner;
222 } else if (sect->sct_type != SCT_WAREH
223 && sect->sct_type != SCT_HARBR) {
224 wu(0, comm.com_maxbidder,
225 "Sector not a warehouse now, sale #%d fell though.\n", n);
226 wu(0, comm.com_owner,
227 "Sale #%d fell through. Goods remain on the market.\n", n);
228 comm.com_maxbidder = comm.com_owner;
229 } else if (m + comm.com_amount > ITEM_MAX) {
230 wu(0, comm.com_maxbidder,
231 "Warehouse full, sale #%d fell though.\n", n);
232 wu(0, comm.com_owner,
233 "Sale #%d fell through. Goods remain on the market.\n", n);
234 comm.com_maxbidder = comm.com_owner;
235 } else {
236 sect->sct_item[comm.com_type] = m + comm.com_amount;
237 putsect(sect);
238 nreport(comm.com_owner, N_MAKE_SALE, comm.com_maxbidder, 1);
239 wu(0, comm.com_owner, "%s bought %d %s from you for $%.2f\n",
240 cname(comm.com_maxbidder), comm.com_amount,
241 ichr[comm.com_type].i_name, gain);
242 wu(0, comm.com_maxbidder,
243 "You just bought %d %s from %s for $%.2f\n",
244 comm.com_amount, ichr[comm.com_type].i_name,
245 cname(comm.com_owner), price);
246 natp->nat_money -= roundavg(price);
247 putnat(natp);
248 natp = getnatp(comm.com_owner);
249 natp->nat_money += roundavg(gain);
250 putnat(natp);
251 comm.com_owner = 0;
252 }
253 comm.com_owner = 0;
254 putcomm(n, &comm);
255 }
256 return RET_OK;
257 }
258