X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=client%2Fsrc%2Fvariants%2FUpsidedown.js;h=bf3e37c46b950f6ec156669a3a6326841db8c114;hb=dac395887d96e2d642b209c6db6aaacc3ffacb34;hp=c3e8716ece4a9d184ec7491cdd31cfd513275a74;hpb=656b187886e5187e52fafe44b7dc0fb45ccd9222;p=vchess.git

diff --git a/client/src/variants/Upsidedown.js b/client/src/variants/Upsidedown.js
index c3e8716e..bf3e37c4 100644
--- a/client/src/variants/Upsidedown.js
+++ b/client/src/variants/Upsidedown.js
@@ -1,70 +1,74 @@
-class UpsidedownRules extends ChessRules
+import { ChessRules } from "@/base_rules";
+import { randInt } from "@/utils/alea";
+import { ArrayFun } from "@/utils/array";
+
+export const VariantRules = class UpsidedownRules extends ChessRules
 {
-	static get HasFlags() { return false; }
+  static get HasFlags() { return false; }
 
-	static get HasEnpassant() { return false; }
+  static get HasEnpassant() { return false; }
 
-	getPotentialKingMoves(sq)
-	{
-		// No castle
-		return this.getSlideNJumpMoves(sq,
-			V.steps[V.ROOK].concat(V.steps[V.BISHOP]), "oneStep");
-	}
+  getPotentialKingMoves(sq)
+  {
+    // No castle
+    return this.getSlideNJumpMoves(sq,
+      V.steps[V.ROOK].concat(V.steps[V.BISHOP]), "oneStep");
+  }
 
-	static GenRandInitFen()
-	{
-		let pieces = { "w": new Array(8), "b": new Array(8) };
-		for (let c of ["w","b"])
-		{
-			let positions = range(8);
+  static GenRandInitFen()
+  {
+    let pieces = { "w": new Array(8), "b": new Array(8) };
+    for (let c of ["w","b"])
+    {
+      let positions = ArrayFun.range(8);
 
-			let randIndex = randInt(8);
-			const kingPos = positions[randIndex];
-			positions.splice(randIndex, 1);
+      let randIndex = randInt(8);
+      const kingPos = positions[randIndex];
+      positions.splice(randIndex, 1);
 
-			// At least a knight must be next to the king:
-			let knight1Pos = undefined;
-			if (kingPos == 0)
-				knight1Pos = 1;
-			else if (kingPos == V.size.y-1)
-				knight1Pos = V.size.y-2;
-			else
-				knight1Pos = kingPos + (Math.randInt() < 0.5 ? 1 : -1);
-			// Search for knight1Pos index in positions and remove it
-			const knight1Index = positions.indexOf(knight1Pos);
-			positions.splice(knight1Index, 1);
+      // At least a knight must be next to the king:
+      let knight1Pos = undefined;
+      if (kingPos == 0)
+        knight1Pos = 1;
+      else if (kingPos == V.size.y-1)
+        knight1Pos = V.size.y-2;
+      else
+        knight1Pos = kingPos + (Math.random() < 0.5 ? 1 : -1);
+      // Search for knight1Pos index in positions and remove it
+      const knight1Index = positions.indexOf(knight1Pos);
+      positions.splice(knight1Index, 1);
 
-			// King+knight1 are on two consecutive squares: one light, one dark
-			randIndex = 2 * randInt(3);
-			const bishop1Pos = positions[randIndex];
-			let randIndex_tmp = 2 * randInt(3) + 1;
-			const bishop2Pos = positions[randIndex_tmp];
-			positions.splice(Math.max(randIndex,randIndex_tmp), 1);
-			positions.splice(Math.min(randIndex,randIndex_tmp), 1);
+      // King+knight1 are on two consecutive squares: one light, one dark
+      randIndex = 2 * randInt(3);
+      const bishop1Pos = positions[randIndex];
+      let randIndex_tmp = 2 * randInt(3) + 1;
+      const bishop2Pos = positions[randIndex_tmp];
+      positions.splice(Math.max(randIndex,randIndex_tmp), 1);
+      positions.splice(Math.min(randIndex,randIndex_tmp), 1);
 
-			randIndex = randInt(4);
-			const knight2Pos = positions[randIndex];
-			positions.splice(randIndex, 1);
+      randIndex = randInt(4);
+      const knight2Pos = positions[randIndex];
+      positions.splice(randIndex, 1);
 
-			randIndex = randInt(3);
-			const queenPos = positions[randIndex];
-			positions.splice(randIndex, 1);
+      randIndex = randInt(3);
+      const queenPos = positions[randIndex];
+      positions.splice(randIndex, 1);
 
-			const rook1Pos = positions[0];
-			const rook2Pos = positions[1];
+      const rook1Pos = positions[0];
+      const rook2Pos = positions[1];
 
-			pieces[c][rook1Pos] = 'r';
-			pieces[c][knight1Pos] = 'n';
-			pieces[c][bishop1Pos] = 'b';
-			pieces[c][queenPos] = 'q';
-			pieces[c][kingPos] = 'k';
-			pieces[c][bishop2Pos] = 'b';
-			pieces[c][knight2Pos] = 'n';
-			pieces[c][rook2Pos] = 'r';
-		}
-		return pieces["w"].join("").toUpperCase() +
-			"/PPPPPPPP/8/8/8/8/pppppppp/" +
-			pieces["b"].join("") +
-			" w"; //no castle, no en-passant
-	}
+      pieces[c][rook1Pos] = 'r';
+      pieces[c][knight1Pos] = 'n';
+      pieces[c][bishop1Pos] = 'b';
+      pieces[c][queenPos] = 'q';
+      pieces[c][kingPos] = 'k';
+      pieces[c][bishop2Pos] = 'b';
+      pieces[c][knight2Pos] = 'n';
+      pieces[c][rook2Pos] = 'r';
+    }
+    return pieces["w"].join("").toUpperCase() +
+      "/PPPPPPPP/8/8/8/8/pppppppp/" +
+      pieces["b"].join("") +
+      " w 0"; //no castle, no en-passant
+  }
 }