Add Orda variant. Some advances in Dynamo draft. Display error message when loading...

[vchess.git] / client / src / variants / Dynamo.js

diff --git a/client/src/variants/Dynamo.js b/client/src/variants/Dynamo.js
index c76c040..4ec1927 100644 (file)
--- a/client/src/variants/Dynamo.js
+++ b/client/src/variants/Dynamo.js
@@ -1,5 +1,97 @@
 import { ChessRules } from "@/base_rules";
 
 export class DynamoRules extends ChessRules {
-  // TODO
+  canIplay(side, [x, y]) {
+    // Sometimes opponent's pieces can be moved directly
+    return true;
+  }
+
+  // NOTE: to push a piece out of the board, make it slide until our piece
+  // (doing the action, moving or not)
+  getPotentialMovesFrom([x, y]) {
+    const color = this.turn;
+    let moves = [];
+    if (this.getColor(x, y) != color) {
+      // Push or pull something: freely only if subTurn == 1
+      if (this.subTurn == 2) {
+        // I know that someone is pushing/pulling: find out who,
+        // and deduce my possible squares (or exit).
+        // TODO
+      } else {
+        // Look in every direction for a friendly pusher/puller.
+        // This means that the action is done without moving.
+        // TODO
+      }
+    } else {
+      // My piece: fill first with normal moves (if any),
+      // and add pushes/pulls (if any).
+      // TODO
+    }
+  }
+
+  getPPpath(m) {
+    let imgName = "";
+    if (m.vanish.length == 1) imgName = "empty";
+    else {
+      // Something is pushed or pull: count by how many squares
+      if (m.appear.length == 1)
+        // It just exit the board
+        imgName = "raus";
+      else {
+        const deltaX = Math.abs(m.appear[1].x - m.vanish[1].x);
+        const deltaY = Math.abs(m.appear[1].y - m.vanish[1].y);
+        if (deltaX == 0) imgName = "shift" + deltaY;
+        else if (deltaY == 0) imgName = "shift" + deltaX;
+        else
+          // Special knight push/pull: just print "P"
+          imgName = "pstep";
+      }
+    }
+    return "Dynamo/" + imgName;
+  }
+
+  isAttackedBySlideNJump([x, y], color, piece, steps, oneStep) {
+    for (let step of steps) {
+      let rx = x + step[0],
+          ry = y + step[1];
+      while (V.OnBoard(rx, ry) && this.board[rx][ry] == V.EMPTY && !oneStep) {
+        rx += step[0];
+        ry += step[1];
+      }
+      if (
+        V.OnBoard(rx, ry) &&
+        this.getPiece(rx, ry) == piece &&
+        this.getColor(rx, ry) == color
+      ) {
+        // Now step in the other direction: if end of the world, then attacked
+        rx = x - step[0];
+        ry = y - step[1];
+        while (V.OnBoard(rx, ry) && this.board[rx][ry] == V.EMPTY && !oneStep) {
+          rx -= step[0];
+          ry -= step[1];
+        }
+        if (!V.OnBoard(rx, ry)) return true;
+      }
+    }
+    return false;
+  }
+
+  isAttackedByPawn([x, y], color) {
+    const lastRank = (color == 'w' ? 0 : 7);
+    if (y != lastRank)
+      // The king can be pushed out by a pawn only on last rank
+      return false;
+    const pawnShift = (color == "w" ? 1 : -1);
+    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;
+  }
 };