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