jens@0: /*  This code is based on Apple's "GeekGameBoard" sample code, version 1.0.
jens@0:     http://developer.apple.com/samplecode/GeekGameBoard/
jens@0:     Copyright © 2007 Apple Inc. Copyright © 2008 Jens Alfke. All Rights Reserved.
jens@0: 
jens@0:     Redistribution and use in source and binary forms, with or without modification, are permitted
jens@0:     provided that the following conditions are met:
jens@0: 
jens@0:     * Redistributions of source code must retain the above copyright notice, this list of conditions
jens@0:       and the following disclaimer.
jens@0:     * Redistributions in binary form must reproduce the above copyright notice, this list of
jens@0:       conditions and the following disclaimer in the documentation and/or other materials provided
jens@0:       with the distribution.
jens@0: 
jens@0:     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
jens@0:     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 
jens@0:     FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-
jens@0:     BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
jens@0:     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
jens@0:     PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
jens@0:     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
jens@0:     THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
jens@0: */
jens@0: #import <Cocoa/Cocoa.h>
jens@0: @class Bit, Player;
jens@0: @protocol BitHolder;
jens@0: 
jens@0: 
jens@0: /** Abstract superclass. Keeps track of the rules and turns of a game. */
jens@0: @interface Game : NSObject
jens@0: {
jens@0:     CALayer *_board;
jens@0:     NSArray *_players;
jens@0:     Player *_currentPlayer, *_winner;
jens@0: }
jens@0: 
jens@0: /** Returns the human-readable name of this game.
jens@0:     (By default it just returns the class name with the "Game" suffix removed.) */
jens@0: + (NSString*) displayName;
jens@0: 
jens@0: @property (readonly, copy) NSArray *players;
jens@0: @property (readonly) Player *currentPlayer, *winner;
jens@0: 
jens@0: 
jens@0: // Methods for subclasses to implement:
jens@0: 
jens@0: /** Designated initializer. After calling the superclass implementation,
jens@0:     it should add the necessary Grids, Pieces, Cards, Decks etc. to the board. */
jens@0: - (id) initWithBoard: (CALayer*)board;
jens@0: 
jens@0: /** Should return YES if it is legal for the given bit to be moved from its current holder.
jens@0:     Default implementation always returns YES. */
jens@0: - (BOOL) canBit: (Bit*)bit moveFrom: (id<BitHolder>)src;
jens@0: 
jens@0: /** Should return YES if it is legal for the given Bit to move from src to dst.
jens@0:     Default implementation always returns YES. */
jens@0: - (BOOL) canBit: (Bit*)bit moveFrom: (id<BitHolder>)src to: (id<BitHolder>)dst;
jens@0: 
jens@0: /** Should handle any side effects of a Bit's movement, such as captures or scoring.
jens@0:     Does not need to do the actual movement! That's already happened.
jens@0:     It should end by calling -endTurn, if the player's turn is over.
jens@0:     Default implementation just calls -endTurn. */
jens@0: - (void) bit: (Bit*)bit movedFrom: (id<BitHolder>)src to: (id<BitHolder>)dst;
jens@0: 
jens@0: /** Called instead of the above if a Bit is simply clicked, not dragged.
jens@0:     Should return NO if the click is illegal (i.e. clicking an empty draw pile in a card game.)
jens@0:     Default implementation always returns YES. */
jens@0: - (BOOL) clickedBit: (Bit*)bit;
jens@0: 
jens@0: /** Should return the winning player, if the current position is a win, else nil.
jens@0:     Default implementation returns nil. */
jens@0: - (Player*) checkForWinner;
jens@0: 
jens@0: 
jens@0: // Protected methods for subclasses to call:
jens@0: 
jens@0: /** Sets the number of players in the game. Subclass initializers should call this. */
jens@0: - (void) setNumberOfPlayers: (unsigned)n;
jens@0: 
jens@0: /** Advance to the next player, when a turn is over. */
jens@0: - (void) nextPlayer;
jens@0: 
jens@0: /** Checks for a winner and advances to the next player. */
jens@0: - (void) endTurn;
jens@0: 
jens@0: @end
jens@0: 
jens@0: 
jens@0: 
jens@0: /** A mostly-passive object used to represent a player. */
jens@0: @interface Player : NSObject
jens@0: {
jens@0:     Game *_game;
jens@0:     NSString *_name;
jens@0: }
jens@0: 
jens@0: - (id) initWithGame: (Game*)game;
jens@0: 
jens@0: @property (readonly) Game *game;
jens@0: @property (copy) NSString *name;
jens@0: @property (readonly) int index;
jens@0: @property (readonly, getter=isCurrent) BOOL current;
jens@0: @property (readonly, getter=isFriendly) BOOL friendly;
jens@0: @property (readonly, getter=isUnfriendly) BOOL unfriendly;
jens@0: @property (readonly) Player *nextPlayer, *previousPlayer;
jens@0: 
jens@0: @end
jens@0: 
jens@0: 
jens@0: 
jens@0: @interface CALayer (Game)
jens@0: 
jens@0: /** Called on any CALayer in the game's layer tree, will return the current Game object. */
jens@0: @property (readonly) Game *game;
jens@0: 
jens@0: @end