Add FB and Twitter links on main page. Only icons, no text for Discord + Github as...

[vchess.git] / client / src / base_rules.js

diff --git a/client/src/base_rules.js b/client/src/base_rules.js
index 167be91..e0353e8 100644 (file)
--- a/client/src/base_rules.js
+++ b/client/src/base_rules.js
@@ -80,6 +80,24 @@ export const ChessRules = class ChessRules {
     return V.ShowMoves;
   }
 
+  // Sometimes moves must remain hidden until game ends
+  static get SomeHiddenMoves() {
+    return false;
+  }
+  get someHiddenMoves() {
+    return V.SomeHiddenMoves;
+  }
+
+  // Generally true, unless the variant includes random effects
+  static get CorrConfirm() {
+    return true;
+  }
+
+  // Used for Monochrome variant (TODO: harmonize: !canFlip ==> showFirstTurn)
+  get showFirstTurn() {
+    return false;
+  }
+
   // Some variants always show the same orientation
   static get CanFlip() {
     return true;
@@ -88,11 +106,35 @@ export const ChessRules = class ChessRules {
     return V.CanFlip;
   }
 
+  // For (generally old) variants without checkered board
+  static get Monochrome() {
+    return false;
+  }
+
+  // Some variants require lines drawing
+  static get Lines() {
+    if (V.Monochrome) {
+      let lines = [];
+      // Draw all inter-squares lines
+      for (let i = 0; i <= V.size.x; i++)
+        lines.push([[i, 0], [i, V.size.y]]);
+      for (let j = 0; j <= V.size.y; j++)
+        lines.push([[0, j], [V.size.x, j]]);
+      return lines;
+    }
+    return null;
+  }
+
   // Some variants use click infos:
   doClick() {
     return null;
   }
 
+  // Some variants may need to highlight squares on hover (Hamilton, Weiqi...)
+  hoverHighlight() {
+    return false;
+  }
+
   static get IMAGE_EXTENSION() {
     // All pieces should be in the SVG format
     return ".svg";
@@ -263,7 +305,8 @@ export const ChessRules = class ChessRules {
   }
 
   // On which squares is color under check ? (for interface)
-  getCheckSquares(color) {
+  getCheckSquares() {
+    const color = this.turn;
     return (
       this.underCheck(color)
         // kingPos must be duplicated, because it may change:
@@ -468,7 +511,7 @@ export const ChessRules = class ChessRules {
       return;
     const fenParsed = V.ParseFen(fen);
     this.board = V.GetBoard(fenParsed.position);
-    this.turn = fenParsed.turn[0]; //[0] to work with MarseilleRules
+    this.turn = fenParsed.turn;
     this.movesCount = parseInt(fenParsed.movesCount);
     this.setOtherVariables(fen);
   }
@@ -703,13 +746,12 @@ export const ChessRules = class ChessRules {
   // Consider all potential promotions:
   addPawnMoves([x1, y1], [x2, y2], moves, promotions) {
     let finalPieces = [V.PAWN];
-    const color = this.turn;
+    const color = this.turn; //this.getColor(x1, y1);
     const lastRank = (color == "w" ? 0 : V.size.x - 1);
     if (x2 == lastRank) {
       // promotions arg: special override for Hiddenqueen variant
       if (!!promotions) finalPieces = promotions;
-      else if (!!V.PawnSpecs.promotions)
-        finalPieces = V.PawnSpecs.promotions;
+      else if (!!V.PawnSpecs.promotions) finalPieces = V.PawnSpecs.promotions;
     }
     let tr = null;
     for (let piece of finalPieces) {
@@ -720,7 +762,7 @@ export const ChessRules = class ChessRules {
 
   // What are the pawn moves from square x,y ?
   getPotentialPawnMoves([x, y], promotions) {
-    const color = this.turn;
+    const color = this.turn; //this.getColor(x, y);
     const [sizeX, sizeY] = [V.size.x, V.size.y];
     const pawnShiftX = V.PawnSpecs.directions[color];
     const firstRank = (color == "w" ? sizeX - 1 : 0);
@@ -758,10 +800,7 @@ export const ChessRules = class ChessRules {
         // Captures
         if (V.PawnSpecs.canCapture) {
           for (let shiftY of [-1, 1]) {
-            if (
-              y + shiftY >= 0 &&
-              y + shiftY < sizeY
-            ) {
+            if (y + shiftY >= 0 && y + shiftY < sizeY) {
               if (
                 this.board[x + shiftX][y + shiftY] != V.EMPTY &&
                 this.canTake([x, y], [x + shiftX, y + shiftY])
@@ -878,6 +917,7 @@ export const ChessRules = class ChessRules {
         if (
           // NOTE: "castling" arg is used by some variants (Monster),
           // where "isAttacked" is overloaded in an infinite-recursive way.
+          // TODO: not used anymore (Monster + Doublemove2 are simplified).
           (!castleInCheck && this.isAttacked([x, i], oppCol, "castling")) ||
           (this.board[x][i] != V.EMPTY &&
             // NOTE: next check is enough, because of chessboard constraints
@@ -989,12 +1029,11 @@ export const ChessRules = class ChessRules {
     const color = this.turn;
     for (let i = 0; i < V.size.x; i++) {
       for (let j = 0; j < V.size.y; j++) {
-        if (this.getColor(i, j) == color) {
+        if (this.board[i][j] != V.EMPTY && this.getColor(i, j) == color) {
           const moves = this.getPotentialMovesFrom([i, j]);
           if (moves.length > 0) {
-            for (let k = 0; k < moves.length; k++) {
+            for (let k = 0; k < moves.length; k++)
               if (this.filterValid([moves[k]]).length > 0) return true;
-            }
           }
         }
       }
@@ -1036,21 +1075,15 @@ export const ChessRules = class ChessRules {
   }
 
   // Is square x,y attacked by 'color' pawns ?
-  isAttackedByPawn([x, y], color) {
+  isAttackedByPawn(sq, color) {
     const pawnShift = (color == "w" ? 1 : -1);
-    if (x + pawnShift >= 0 && x + pawnShift < V.size.x) {
-      for (let i of [-1, 1]) {
-        if (
-          y + i >= 0 &&
-          y + i < V.size.y &&
-          this.getPiece(x + pawnShift, y + i) == V.PAWN &&
-          this.getColor(x + pawnShift, y + i) == color
-        ) {
-          return true;
-        }
-      }
-    }
-    return false;
+    return this.isAttackedBySlideNJump(
+      sq,
+      color,
+      V.PAWN,
+      [[pawnShift, 1], [pawnShift, -1]],
+      "oneStep"
+    );
   }
 
   // Is square x,y attacked by 'color' rooks ?
@@ -1246,10 +1279,11 @@ export const ChessRules = class ChessRules {
     return 3;
   }
 
-  getComputerMove() {
+  // 'movesList' arg for some variants to provide a custom list
+  getComputerMove(movesList) {
     const maxeval = V.INFINITY;
     const color = this.turn;
-    let moves1 = this.getAllValidMoves();
+    let moves1 = movesList || this.getAllValidMoves();
 
     if (moves1.length == 0)
       // TODO: this situation should not happen