git.pond.sub.org Git - empserver/blob - src/lib/commands/repa.c

   1 /*
   2  *  Empire - A multi-player, client/server Internet based war game.
   3  *  Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
   4  *                           Ken Stevens, Steve McClure
   5  *
   6  *  This program 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 2 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, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ---
  21  *
  22  *  See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
  23  *  related information and legal notices. It is expected that any future
  24  *  projects/authors will amend these files as needed.
  25  *
  26  *  ---
  27  *
  28  *  repa.c: repay loan from a country
  29  *
  30  *  Known contributors to this file:
  31  *
  32  */
  33
  34 #include <math.h>
  35 #include "misc.h"
  36 #include "player.h"
  37 #include "nat.h"
  38 #include "loan.h"
  39 #include "news.h"
  40 #include "file.h"
  41 #include "commands.h"
  42 #include "optlist.h"
  43
  44 int
  45 repa(void)
  46 {
  47         struct  lonstr loan;
  48         struct  natstr *natp;
  49         struct  natstr *loaner;
  50         int     loan_num;
  51         long    payment;
  52         long    owe;
  53         long    due;
  54         long    last_payment;
  55         long    normaltime;
  56         long    doubletime;
  57         double  rate_per_sec,amt;
  58         s_char  *cp;
  59         time_t  now;
  60         s_char  buf[1024];
  61
  62         if (!opt_LOANS) {
  63             pr("Loans are not enabled.\n");
  64             return RET_FAIL;
  65         }
  66         natp = getnatp(player->cnum);
  67         cp = getstarg(player->argp[1], "Repay loan #? ", buf);
  68         if (cp == 0)
  69                 return RET_SYN;
  70         loan_num = atoi(cp);
  71         if (loan_num < 0)
  72                 return RET_SYN;
  73         if (!getloan(loan_num, &loan) || loan.l_lonee != player->cnum
  74             || loan.l_status != LS_SIGNED) {
  75                 pr("You don't owe anything on that loan.\n");
  76                 return RET_FAIL;
  77         }
  78         (void) time(&now);
  79         due = loan.l_duedate;
  80         last_payment = loan.l_lastpay;
  81         if (now < due) {
  82                 normaltime = now - last_payment;
  83                 doubletime = 0;
  84         }
  85         if (last_payment < due && due < now) {
  86                 normaltime = due - last_payment;
  87                 doubletime = now - due;
  88         }
  89         if (due < last_payment) {
  90                 normaltime = 0;
  91                 doubletime = now - last_payment;
  92         }
  93         rate_per_sec = loan.l_irate /
  94                 ((double) loan.l_ldur * SECS_PER_DAY * 100.0);
  95
  96         owe = (long) (loan.l_amtdue *
  97                 ((double) normaltime * rate_per_sec + 1.0 +
  98                 (double) doubletime * rate_per_sec * 2.0) + 0.5);
  99         amt = ((double) normaltime * rate_per_sec + 1.0 +
 100                 (double) doubletime * rate_per_sec * 2.0);
 101         if (((1 << 30) / amt) < loan.l_amtdue)
 102                 owe = (1 << 30);
 103         else
 104                 owe = (long) (loan.l_amtdue *
 105                     ((double) normaltime * rate_per_sec + 1.0 +
 106                     (double) doubletime * rate_per_sec * 2.0) + 0.5);
 107         if ((cp = getstarg(player->argp[2], "amount? ", buf)) == 0)
 108                 return RET_SYN;
 109         if (!check_loan_ok(&loan))
 110             return RET_FAIL;
 111         payment = atoi(cp);
 112         if (payment <= 0)
 113                 return RET_SYN;
 114         if (payment > owe) {
 115                 pr("You don't owe that much.\n");
 116                 return RET_FAIL;
 117         }
 118         if (natp->nat_money < payment) {
 119                 pr("You only have $%d.\n", natp->nat_money);
 120                 return RET_FAIL;
 121         }
 122         player->dolcost += payment;
 123         loaner = getnatp(loan.l_loner);
 124         loaner->nat_money += payment;
 125         putnat(loaner);
 126         (void) time(&loan.l_lastpay);
 127         if (owe <= payment) {
 128                 wu(0, loan.l_loner, "Country #%d paid off loan #%d with $%d\n",
 129                         player->cnum, loan_num, payment);
 130                 nreport(player->cnum, N_REPAY_LOAN, loan.l_loner, 1);
 131                 loan.l_status = LS_FREE;
 132                 loan.l_ldur = 0;
 133                 pr("Congratulations, you've paid off the loan!\n");
 134         } else {
 135                 wu(0, loan.l_loner,
 136                    "Country #%d paid $%.2f on loan %d\n", player->cnum,
 137                        (double) payment, loan_num);
 138                 loan.l_amtdue = owe - payment;
 139                 loan.l_amtpaid += payment;
 140         }
 141         if (!putloan(loan_num, &loan)) {
 142                 pr("Can't save loan; get help!\n");
 143                 return RET_SYS;
 144         }
 145         return RET_OK;
 146 }