added method for opening name

src/classes/BoardApi.ts

@@ -4,6 +4,7 @@ import { possibleMoves, shortToLongColor } from '@/helper/Board';
 import type { ChessInstance } from 'chess.js';
 import type { Api } from 'chessground/api';
 import type { BoardState } from '@/typings/BoardStore';
+import type { LichessOpening } from '@/typings/BoardAPI';
 
 /**
  * class for modifying and reading data from the board, \
@@ -119,6 +120,25 @@ export class BoardApi {
       this.board.setShapes([]);
     }
   }
+
+  /**
+   * returns the opening name for the current position
+   */
+  async getOpeningName() {
+    const movesArr: string[] = [];
+    const history = this.game.history({ verbose: true });
+    history.forEach((move) => {
+      movesArr.push(move.from + move.to);
+    });
+
+    const moves = movesArr.join(',');
+
+    const res = await fetch(
+      `https://explorer.lichess.ovh/masters?play=${moves}`
+    );
+    const data: LichessOpening = await res.json();
+    return data.opening.name;
+  }
 }
 
 export default BoardApi;

src/typings/BoardAPI.ts

@@ -0,0 +1,37 @@
+export interface LichessOpening {
+  white: number;
+  black: number;
+  draws: number;
+  moves: [
+    {
+      uci: string;
+      san: string;
+      averageRating: number;
+      white: number;
+      game: null;
+      black: number;
+      draws: number;
+    }
+  ];
+  opening: {
+    eco: string;
+    name: string;
+  };
+  topGames: [
+    {
+      id: string;
+      uci: string;
+      month: string;
+      year: number;
+      winner: 'white' | 'black' | null;
+      white: {
+        name: string;
+        rating: number;
+      };
+      black: {
+        name: string;
+        rating: number;
+      };
+    }
+  ];
+}