X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=public%2Fjavascripts%2Fvariants%2FSwitching.js;h=cedba3dbdb2e15c8dbc869329355d2ad6032bd8d;hb=15952ada1d73262371654351ab8a4471f64010fd;hp=cc2febd1e646f64fbdec59e520e9a94fa7ee1243;hpb=1221ac47836806efb287b0323b92957d9129c653;p=vchess.git

diff --git a/public/javascripts/variants/Switching.js b/public/javascripts/variants/Switching.js
index cc2febd1..cedba3db 100644
--- a/public/javascripts/variants/Switching.js
+++ b/public/javascripts/variants/Switching.js
@@ -3,10 +3,12 @@ class SwitchingRules extends ChessRules
 	// Build switch move between squares x1,y1 and x2,y2
 	getSwitchMove_s([x1,y1],[x2,y2])
 	{
-
 		const c = this.getColor(x1,y1); //same as color at square 2
 		const p1 = this.getPiece(x1,y1);
 		const p2 = this.getPiece(x2,y2);
+		const V = VariantRules;
+		if (p1 == V.KING && p2 == V.ROOK)
+			return []; //avoid duplicate moves (potential conflict with castle)
 		let move = new Move({
 			appear: [
 				new PiPo({x:x2,y:y2,c:c,p:p1}),
@@ -22,28 +24,37 @@ class SwitchingRules extends ChessRules
 		// Move completion: promote switched pawns (as in Magnetic)
 		const sizeX = VariantRules.size[0];
 		const lastRank = (c == "w" ? 0 : sizeX-1);
-		const V = VariantRules;
 		let moves = [];
-		if (p1==V.PAWN && x2==lastRank) //TODO: also the case p2==V.PAWN and x1==lastRank! see Magnetic chess
+		if ((p1==V.PAWN && x2==lastRank) || (p2==V.PAWN && x1==lastRank))
 		{
-			move.appear[0].p = V.ROOK;
+			const idx = (p1==V.PAWN ? 0 : 1);
+			move.appear[idx].p = V.ROOK;
 			moves.push(move);
 			for (let piece of [V.KNIGHT, V.BISHOP, V.QUEEN])
 			{
 				let cmove = JSON.parse(JSON.stringify(move));
-				cmove.appear[0].p = piece;
+				cmove.appear[idx].p = piece;
 				moves.push(cmove);
 			}
+			if (idx == 1)
+			{
+				// Swap moves[i].appear[0] and [1] for moves presentation [TODO...]
+				moves.forEach(m => {
+					let tmp = m.appear[0];
+					m.appear[0] = m.appear[1];
+					m.appear[1] = tmp;
+				});
+			}
 		}
 		else //other cases
 			moves.push(move);
 		return moves;
 	}
 
-	getPotentialMovesFrom([x,y])
+	getPotentialMovesFrom([x,y], computer)
 	{
 		let moves = super.getPotentialMovesFrom([x,y]);
-		// Add switches:
+		// Add switches: respecting chessboard ordering if "computer" is on
 		const V = VariantRules;
 		const color = this.turn;
 		const piece = this.getPiece(x,y);
@@ -54,6 +65,8 @@ class SwitchingRules extends ChessRules
 		for (let step of steps)
 		{
 			let [i,j] = [x+step[0],y+step[1]];
+			if (!!computer && (i<x || (i==x && j<y)))
+				continue; //only switch with superior indices
 			if (i>=0 && i<sizeX && j>=0 && j<sizeY && this.board[i][j]!=V.EMPTY
 				&& this.getColor(i,j)==color && this.getPiece(i,j)!=piece
 				// No switching under check (theoretically non-king pieces could, but not)
@@ -69,5 +82,63 @@ class SwitchingRules extends ChessRules
 		return moves;
 	}
 
-	static get SEARCH_DEPTH() { return 2; } //branching factor is quite high
+	getAllValidMoves(computer)
+	{
+		const color = this.turn;
+		const oppCol = this.getOppCol(color);
+		let potentialMoves = [];
+		const [sizeX,sizeY] = VariantRules.size;
+		for (let i=0; i<sizeX; i++)
+		{
+			for (let j=0; j<sizeY; j++)
+			{
+				if (this.board[i][j] != VariantRules.EMPTY && this.getColor(i,j) == color)
+				{
+					Array.prototype.push.apply(potentialMoves,
+						this.getPotentialMovesFrom([i,j], computer));
+				}
+			}
+		}
+		return this.filterValid(potentialMoves);
+	}
+
+	updateVariables(move)
+	{
+		super.updateVariables(move);
+		if (move.appear.length == 2 && move.vanish.length == 2
+			&& move.appear[1].p == VariantRules.KING)
+		{
+			// Switch with the king; not castle, and not handled by main class
+			const color = this.getColor(move.start.x, move.start.y);
+			this.kingPos[color] = [move.appear[1].x, move.appear[1].y];
+		}
+	}
+
+	unupdateVariables(move)
+	{
+		super.unupdateVariables(move);
+		if (move.appear.length == 2 && move.vanish.length == 2
+			&& move.appear[1].p == VariantRules.KING)
+		{
+			const color = this.getColor(move.start.x, move.start.y);
+			this.kingPos[color] = [move.appear[0].x, move.appear[0].y];
+		}
+	}
+
+	static get SEARCH_DEPTH() { return 2; } //high branching factor
+
+	getNotation(move)
+	{
+		if (move.appear.length == 1)
+			return super.getNotation(move); //no switch
+		// Switch or castle
+		if (move.appear[0].p == VariantRules.KING && move.appear[1].p == VariantRules.ROOK)
+			return (move.end.y < move.start.y ? "0-0-0" : "0-0");
+		// Switch:
+		const startSquare =
+			String.fromCharCode(97 + move.start.y) + (VariantRules.size[0]-move.start.x);
+		const finalSquare =
+			String.fromCharCode(97 + move.end.y) + (VariantRules.size[0]-move.end.x);
+		return "S" + startSquare + finalSquare;
+	}
 }