/*-------------------------------------------------------------------------
svninfo: $Id$
Maarten's Mud, WWW-based MUD using MYSQL
Copyright (C) 1998 Maarten van Leunen
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.
Maarten van Leunen
Appelhof 27
5345 KA Oss
Nederland
Europe
maarten_l@yahoo.com
-------------------------------------------------------------------------*/
package mmud.commands;
import java.util.Vector;
import java.util.logging.Logger;
import mmud.Constants;
import mmud.MudException;
import mmud.ParseException;
import mmud.characters.Person;
import mmud.characters.Persons;
import mmud.characters.ShopKeeper;
import mmud.characters.User;
import mmud.database.Database;
import mmud.database.ItemsDb;
import mmud.items.Item;
import mmud.items.ItemException;
/**
* Buying an item from a bot. Syntax : buy <item> from <character>
*
* @see SellCommand
*/
public class BuyCommand extends NormalCommand
{
public BuyCommand(String aRegExpr)
{
super(aRegExpr);
}
/**
* should be the same as item 38
*/
public static final String[] goldcoin =
{ "valuable", "gold", "shiny", "coin" };
/**
* should be the same as item 37
*/
public static final String[] silvercoin =
{ "valuable", "silver", "shiny", "coin" };
/**
* should be the same as item 36
*/
public static final String[] coppercoin =
{ "valuable", "copper", "shiny", "coin" };
/**
* Tries out the buy command. There are a couple of requirements that need
* to be met, before a successful sale takes place.
* <ol>
* <li>command struct. should be "<I>buy <item> from
* <character></I>", for example: "<I>buy gold ring from Karcas</I>".
* <li>shopkeeper selling the item should
* <ol>
* <li>exist,
* <li>be in the same room and
* <li>
* have a god==4 to indicate "shopkeeper" and
* <li>has the appropriate item for sale
* </ol>
* <li>the customer should be able to afford the item
* </ol>
* A best effort is tried, this means the following sequence of events:
* <ol>
* <li>the item is transferred into the inventory of the customer
* <li>gold coins are transferred into the inventory of the shopkeeper
* <li>silver coins are transferred into the inventory of the shopkeeper
* <li>copper coins are transferred into the inventory of the shopkeeper
* <li>when gold/silver/copper coins are not available in the requested
* quantity, the game will automatically provide appropriate change.
* <li>continue with next item
*</ol>
*
* @param aUser
* the character doing the buying.
* @throws ItemException
* in case the appropriate items could not be properly
* processed.
* @throws ParseException
* if the item description or the number of items requested is
* illegal.
*/
@Override
public boolean run(User aUser) throws ItemException, ParseException,
MudException
{
Logger.getLogger("mmud").finer("");
String[] myParsed = getParsedCommand();
// parse command string
if (myParsed.length >= 4
&& myParsed[myParsed.length - 2].equalsIgnoreCase("from"))
{
// determine if appropriate shopkeeper is found.
Person toChar = Persons
.retrievePerson(myParsed[myParsed.length - 1]);
if ((toChar == null) || (!toChar.getRoom().equals(aUser.getRoom())))
{
aUser.writeMessage("Cannot find that person.<BR>\r\n");
return true;
}
if (!(toChar instanceof ShopKeeper))
{
aUser.writeMessage("That person is not a shopkeeper.<BR>\r\n");
return true;
}
// check for item in posession of shopkeeper
Vector stuff = Constants.parseItemDescription(myParsed, 1,
myParsed.length - 3);
int amount = ((Integer) stuff.elementAt(0)).intValue();
String adject1 = (String) stuff.elementAt(1);
String adject2 = (String) stuff.elementAt(2);
String adject3 = (String) stuff.elementAt(3);
String name = (String) stuff.elementAt(4);
Vector myItems = toChar.getItems(adject1, adject2, adject3, name);
if (myItems.size() < amount)
{
if (amount == 1)
{
aUser.writeMessage(toChar.getName()
+ " does not have that item.<BR>\r\n");
return true;
} else
{
aUser.writeMessage(toChar.getName()
+ " does not have that many items.<BR>\r\n");
return true;
}
}
int sumvalue = 0;
for (int i = 0; i < amount; i++)
{
Item myItem = (Item) myItems.elementAt(i);
sumvalue += myItem.getMoney();
}
if (aUser.getMoney() < sumvalue)
{
aUser.writeMessage("You do not have enough money.<BR>\r\n");
return true;
}
int j = 0;
for (int i = 0; ((i < myItems.size()) && (j != amount)); i++)
{
// here needs to be a check for validity of the item
boolean success = true;
Item myItem = (Item) myItems.elementAt(i);
if (myItem.isAttribute("notbuyable"))
{
aUser.writeMessage("You cannot buy that item.<BR>\r\n");
success = false;
}
if (success)
{
// transfer item to user
int totalitemvalue = myItem.getMoney();
if (success)
{
aUser.transferMoneyTo(totalitemvalue, toChar);
Database.writeLog(aUser.getName(), "paid "
+ totalitemvalue + " copper to " + toChar);
ItemsDb.transferItem(myItem, aUser);
Database.writeLog(aUser.getName(), "bought " + myItem
+ " from " + toChar);
Persons.sendMessage(aUser, toChar, "%SNAME buy%VERB2 "
+ myItem.getDescription()
+ " from %TNAME.<BR>\r\n");
j++;
}
}
}
return true;
}
return false;
}
public Command createCommand()
{
return new BuyCommand(getRegExpr());
}
}