added the method tryMove and the methods used by it into serverstate

Projekte/mdga/model/src/main/java/pp.mdga/server/ServerState.java

@@ -1,9 +1,16 @@
 package pp.mdga.server;
 
+import pp.mdga.game.Color;
+import pp.mdga.game.Node;
 import pp.mdga.game.Piece;
+import pp.mdga.game.PieceState;
+import pp.mdga.game.PlayerData;
 import pp.mdga.message.client.*;
 import pp.mdga.message.server.PossibleCard;
 import java.lang.System.Logger;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
 
 public abstract class ServerState implements Observer {
     protected static final Logger LOGGER = System.getLogger(ServerState.class.getName());
@@ -58,6 +65,126 @@ public ServerState getParent() {
 
     public void update() { /* do nothing */ }
 
+    /**
+     * This method is used to calculate the steps a piece can move
+     *
+     * @return the steps a piece can move
+     */
+    private int calculateSteps(){
+        return logic.getGame().getDiceEyes() * logic.getGame().getDiceModifier();
+    }
+
+    /**
+     * This method is used to test if u can move a piece
+     *
+     * @param piece the piece to be moved
+     * @return true if the piece can be moved, false otherwise
+     */
+    protected boolean tryMove(Piece piece) {
+        if (piece.getState() == PieceState.HOME){
+            return tryHomeMove(piece, calculateSteps());
+        } else {
+            int homeMoves = getHomeMoves(piece, calculateSteps());
+            if (homeMoves > 0){
+                return tryHomeMove(piece, homeMoves);
+            } else {
+                return tryInfieldMove(piece, calculateSteps());
+            }
+        }
+    }
+
+    /**
+     * This method is used to determine if a piece would move into the home area.
+     *
+     * @param piece the piece to be moved
+     * @param steps the steps the piece would move
+     * @return the number of steps the piece would move into the home area
+     */
+    protected int getHomeMoves(Piece piece, int steps) {
+        int figureIndex = logic.getGame().getBoard().getInfieldIndexOfPiece(piece);
+        Color col = piece.getColor();
+        int startIndex = logic.getGame().getBoard().getPlayerData().get(col).getStartNodeIndex();
+        int moveIndex = startIndex + steps;
+        if (moveIndex > logic.getGame().getBoard().getInfield().length){
+            moveIndex %= logic.getGame().getBoard().getInfield().length;
+            if(moveIndex >= startIndex){
+                return moveIndex - startIndex + 1;
+            }
+        } else if (figureIndex < startIndex && moveIndex >= startIndex){
+            return moveIndex - startIndex + 1;
+        }
+        return 0;
+    }
+
+    /**
+     * This method is used to determine if a piece can move in the infield
+     *
+     * @param piece the piece to be moved
+     * @param steps the steps the piece would move
+     * @return true if the piece can move in the infield, false otherwise
+     */
+    protected boolean tryInfieldMove(Piece piece, int steps){
+        int figureIndex = logic.getGame().getBoard().getInfieldIndexOfPiece(piece);
+        int moveIndex = (figureIndex + steps) % logic.getGame().getBoard().getInfield().length;
+        Piece occupant = logic.getGame().getBoard().getInfield()[moveIndex].getOccupant();
+        if(occupant != null){
+            return occupant.getColor() != piece.getColor();
+        }
+        return true;
+    }
+
+    /**
+     * This method is used to determine if a piece can move inside the home area
+     *
+     * @param piece the piece to be moved
+     * @param steps the steps the piece would move
+     * @return true if the piece can move into the home area, false otherwise
+     */
+    protected boolean tryHomeMove(Piece piece, int steps){
+        Color col = piece.getColor();
+        PlayerData playerData = logic.getGame().getBoard().getPlayerData().get(col);
+        Node[] homeNodes = playerData.getHomeNodes();
+        int index;
+
+        if (playerData.homeIncludes(piece)){
+            index = playerData.getIndexInHome(piece);
+        } else {
+            index = 0;
+        }
+        if(index + steps >= homeNodes.length){
+            return false;
+        } else {
+            for(int i = index; i <= index + steps; i++){
+                if(homeNodes[i].getOccupant() != null){
+                    return false;
+                }
+            }
+            return true;
+        }
+    }
+
+    /**
+     * This method is used to get the pieces that can be moved
+     *
+     * @param color the color of the pieces
+     * @return the pieces that can be moved
+     */
+    protected List<Piece> getMoveablePieces(Color color) {
+        ArrayList<Piece> moveablePieces = new ArrayList<>();
+        ArrayList<Piece> pieces = new ArrayList<>();
+        for (Piece piece : logic.getGame().getBoard().getPlayerData().get(color).getPieces()) {
+            if(piece.getState() == PieceState.ACTIVE || piece.getState() == PieceState.HOME){
+                pieces.add(piece);
+            }
+        }
+        for (Piece piece : pieces) {
+            if (tryMove(piece)) {
+                moveablePieces.add(piece);
+            }
+        }
+        return moveablePieces;
+    }
+
     @Override
     public String toString() {
         return getClass().getSimpleName();