Add (real) Football chess

[vchess.git] / client / src / variants / Squatter2.js

diff --git a/client/src/variants/Squatter2.js b/client/src/variants/Squatter2.js
new file mode 100644 (file)
index 0000000..15caaf5
--- /dev/null
+++ b/client/src/variants/Squatter2.js
@@ -0,0 +1,88 @@
+import { ChessRules } from "@/base_rules";
+import { SuicideRules } from "@/variants/Suicide";
+
+export class Squatter2Rules extends ChessRules {
+
+  static get HasFlags() {
+    return false;
+  }
+
+  static get PawnSpecs() {
+    return Object.assign(
+      {},
+      ChessRules.PawnSpecs,
+      { promotions: ChessRules.PawnSpecs.promotions.concat([V.KING]) }
+    );
+  }
+
+  static get Lines() {
+    return [
+      // White goal:
+      [[0, 3], [0, 5]],
+      [[0, 5], [1, 5]],
+      [[1, 5], [1, 3]],
+      [[1, 3], [0, 3]],
+      // Black goal:
+      [[8, 3], [8, 5]],
+      [[8, 5], [7, 5]],
+      [[7, 5], [7, 3]],
+      [[7, 3], [8, 3]]
+    ];
+  }
+
+  static IsGoodPosition(position) {
+    if (position.length == 0) return false;
+    const rows = position.split("/");
+    if (rows.length != V.size.x) return false;
+    // Just check that at least one piece of each color is there:
+    let pieces = { "w": 0, "b": 0 };
+    for (let row of rows) {
+      let sumElts = 0;
+      for (let i = 0; i < row.length; i++) {
+        const lowerRi = row[i].toLowerCase();
+        if (V.PIECES.includes(lowerRi)) {
+          pieces[row[i] == lowerRi ? "b" : "w"]++;
+          sumElts++;
+        }
+        else {
+          const num = parseInt(row[i], 10);
+          if (isNaN(num)) return false;
+          sumElts += num;
+        }
+      }
+      if (sumElts != V.size.y) return false;
+    }
+    if (Object.values(pieces).some(v => v == 0)) return false;
+    return true;
+  }
+
+  scanKings() {}
+
+  filterValid(moves) {
+    return moves;
+  }
+
+  getCheckSquares() {
+    return [];
+  }
+
+  // No variables update because no royal king + no castling
+  prePlay() {}
+  postPlay() {}
+  preUndo() {}
+  postUndo() {}
+
+  getCurrentScore() {
+    const oppCol = V.GetOppCol(this.turn);
+    const goal = (oppCol == 'w' ? 0 : 7);
+    if (this.board[goal].slice(3, 5).some(b => b[0] == oppCol))
+      return oppCol == 'w' ? "1-0" : "0-1";
+    if (this.atLeastOneMove()) return "*";
+    return "1/2";
+  }
+
+  static GenRandInitFen(randomness) {
+    return SuicideRules.GenRandInitFen(randomness);
+  }
+
+};