MinesweeperGame.prototype.toggleFlag = function(x, y) {
    if (!this.hasFlag(x, y)) {
        this.setFlag(x, y);
    } else {
        this.removeFlag(x, y);
    }
};
 
MinesweeperGame.prototype.setFlag = function(x, y) {
    if (!this._isCorrectCell(x, y)) {
        throw new MinesweeperGameException("Некорректные координаты.");
    } else if (this.hasOpened(x, y) ||
               this._flagsCounter < MinesweeperGame.MIN_FLAGS) {
        return false;
    }
    this._flags.addCell(x, y);
    this.dispatchEvent(new GameEvent(GameEvent.CELL_CHANGED, {"x": x, "y": y}));
    this._flagsCounter--;
    this.dispatchEvent(new GameEvent(GameEvent.FLAGS_COUNTER_CHANGED));
};
 
MinesweeperGame.prototype.removeFlag = function(x, y) {
    if (!this._isCorrectCell(x, y)) {
        throw new MinesweeperGameException("Некорректные координаты.");
    }else if (this.hasOpened(x, y)) {
        return false;
    } else if (!this.hasFlag(x, y)) {
        throw new MinesweeperGame("Флаг отсутвует.");
    } else if (this._flagsCounter > this._mines) {
        throw new MinesweeperGameException("Что-то пошло не так...");
    }
    this._flags.deleteCell(x, y);
    this.dispatchEvent(new GameEvent(GameEvent.CELL_CHANGED, {"x": x, "y": y}));
    this._flagsCounter++;
    this.dispatchEvent(new GameEvent(GameEvent.FLAGS_COUNTER_CHANGED));
};
 
DomController.prototype._setEvents = function() {
    this._domView.addRightMouseDownToFieldListener(this.toggleFlag.bind(this));
};
 

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