Implemented piece logic

gui-chess/src/main/java/com/gitea/lin/model/Piece/Bishop.java

@@ -0,0 +1,24 @@
+package com.gitea.lin.model.Piece;
+
+import com.gitea.lin.model.Color;
+import com.gitea.lin.model.Direction;
+import com.gitea.lin.model.Type;
+
+import static com.gitea.lin.model.Direction.*;
+
+public final class Bishop extends Piece {
+    public Bishop(Color c) {
+        super(c);
+    }
+
+    @Override
+    public Direction[] getMoveDomain() {
+        return new Direction[] {NORTH_EAST, NORTH_WEST, SOUTH_EAST, SOUTH_WEST};
+    }
+    @Override
+    public int getMaximumStep() { return 7; }
+    @Override
+    public char getSymbol() { return 'B'; }
+    @Override
+    public Type getType() { return Type.BISHOP; }
+}

gui-chess/src/main/java/com/gitea/lin/model/Piece/King.java

@@ -0,0 +1,33 @@
+package com.gitea.lin.model.Piece;
+
+import com.gitea.lin.model.Color;
+import com.gitea.lin.model.Direction;
+import com.gitea.lin.model.Type;
+
+import static com.gitea.lin.model.Direction.*;
+
+public final class King extends Piece {
+    public King(Color c) {
+        super(c);
+    }
+
+    @Override
+    public Direction[] getMoveDomain() {
+        return new Direction[] {NORTH, NORTH_EAST, EAST, SOUTH_EAST, SOUTH, SOUTH_WEST, WEST, NORTH_WEST};
+    }
+
+    @Override
+    public int getMaximumStep() {
+        return 1;
+    }
+
+    @Override
+    public char getSymbol() {
+        return 'K';
+    }
+
+    @Override
+    public Type getType() {
+        return Type.KING;
+    }
+}

gui-chess/src/main/java/com/gitea/lin/model/Piece/Knight.java

@@ -0,0 +1,24 @@
+package com.gitea.lin.model.Piece;
+
+import com.gitea.lin.model.Color;
+import com.gitea.lin.model.Direction;
+import com.gitea.lin.model.Type;
+
+import static com.gitea.lin.model.Direction.*;
+
+public final class Knight extends Piece {
+    public Knight(Color c) {
+        super(c);
+    }
+
+    @Override
+    public Direction[] getMoveDomain() {
+        return new Direction[] {KNIGHT_ENE, KNIGHT_ESE, KNIGHT_NNE, KNIGHT_NNW, KNIGHT_SSE, KNIGHT_SSW, KNIGHT_WNW, KNIGHT_WSW};
+    }
+    @Override
+    public int getMaximumStep() { return 2; }
+    @Override
+    public char getSymbol() { return 'N'; }
+    @Override
+    public Type getType() { return Type.KNIGHT; }
+}

gui-chess/src/main/java/com/gitea/lin/model/Piece/Pawn.java

@@ -0,0 +1,44 @@
+package com.gitea.lin.model.Piece;
+
+import com.gitea.lin.model.Color;
+import com.gitea.lin.model.Direction;
+import com.gitea.lin.model.Type;
+
+import static com.gitea.lin.model.Direction.*;
+
+public final class Pawn extends Piece {
+    public Pawn(Color c) {
+        super(c);
+    }
+
+    @Override
+    public Direction[] getMoveDomain() {
+        boolean isWhite = super.getColor() == Color.WHITE;
+
+        Direction forward = isWhite ? NORTH : SOUTH;
+        Direction forwardDouble = isWhite ? PAWN_DOUBLE_NORTH : PAWN_DOUBLE_SOUTH;
+        Direction hitLeft = isWhite ? NORTH_WEST : SOUTH_WEST;
+        Direction hitRight = isWhite ? NORTH_EAST : SOUTH_EAST;
+
+        if (super.hasMoved()) {
+            return new Direction[] {forward, hitLeft, hitRight};
+        }
+
+        return new Direction[] {forward, forwardDouble, hitLeft, hitRight};
+    }
+
+    @Override
+    public int getMaximumStep() {
+        return super.hasMoved() ? 1 : 2;
+    }
+
+    @Override
+    public char getSymbol() {
+        return 'P';
+    }
+
+    @Override
+    public Type getType() {
+        return Type.PAWN;
+    }
+}

gui-chess/src/main/java/com/gitea/lin/model/Piece/Piece.java

@@ -0,0 +1,27 @@
+package com.gitea.lin.model.Piece;
+
+import com.gitea.lin.model.Color;
+import com.gitea.lin.model.Direction;
+import com.gitea.lin.model.Type;
+
+public abstract class Piece {
+    private Color pieceColor;
+    private boolean movedBefore;
+
+    public Piece(Color c) {
+        this.pieceColor = c;
+    }
+
+    public abstract Direction[] getMoveDomain();
+    public abstract int getMaximumStep(); // TODO: Update UML
+    public abstract char getSymbol();
+    public abstract Type getType();
+
+    public Color getColor() {
+        return this.pieceColor;
+    }
+
+    public boolean hasMoved() {
+        return this.movedBefore;
+    }
+}

gui-chess/src/main/java/com/gitea/lin/model/Piece/Queen.java

@@ -0,0 +1,24 @@
+package com.gitea.lin.model.Piece;
+
+import com.gitea.lin.model.Color;
+import com.gitea.lin.model.Direction;
+import com.gitea.lin.model.Type;
+
+import static com.gitea.lin.model.Direction.*;
+
+public final class Queen extends Piece {
+    public Queen(Color c) {
+        super(c);
+    }
+
+    @Override
+    public Direction[] getMoveDomain() {
+        return new Direction[] {NORTH, NORTH_EAST, EAST, SOUTH_EAST, SOUTH, SOUTH_WEST, WEST, NORTH_WEST};
+    }
+    @Override
+    public int getMaximumStep() { return 7; }
+    @Override
+    public char getSymbol() { return 'Q'; }
+    @Override
+    public Type getType() { return Type.QUEEN; }
+}

gui-chess/src/main/java/com/gitea/lin/model/Piece/Rook.java

@@ -0,0 +1,24 @@
+package com.gitea.lin.model.Piece;
+
+import com.gitea.lin.model.Color;
+import com.gitea.lin.model.Direction;
+import com.gitea.lin.model.Type;
+
+import static com.gitea.lin.model.Direction.*;
+
+public final class Rook extends Piece {
+    public Rook(Color c) {
+        super(c);
+    }
+
+    @Override
+    public Direction[] getMoveDomain() {
+        return new Direction[] {NORTH, EAST, SOUTH, WEST};
+    }
+    @Override
+    public int getMaximumStep() { return 7; }
+    @Override
+    public char getSymbol() { return 'R'; }
+    @Override
+    public Type getType() { return Type.ROOK; }
+}