Common Event Self Switches

var oldGameInterpreter_command111 = Game_Interpreter.prototype.command111;
Game_Interpreter.prototype.command111 = function() {
  var result = false;
  if (this._params[0] == 2) {
    if (this._commonEventId > 0) {
      var key = ['common-event', this._commonEventId, this._params[1]];
      result = ($gameSelfSwitches.value(key) === (this._params[2] === 0));

      this._branch[this._indent] = result;
      if (this._branch[this._indent] === false) {
          this.skipBranch();
      }
      return true;
    }
  }

  return oldGameInterpreter_command111.apply(this, arguments);
};

var oldGameInterpreter_setupReservedCommonEvent = Game_Interpreter.prototype.setupReservedCommonEvent;
Game_Interpreter.prototype.setupReservedCommonEvent = function() {
    if ($gameTemp.isCommonEventReserved()) {
        var event = $gameTemp.reservedCommonEvent();
        this.setup(event.list);
        this._commonEventId = event.id;
        $gameTemp.clearCommonEvent();
        return true;
    } else {
        return false;
    }
};

var oldGameInterpreter_clear = Game_Interpreter.prototype.clear;
Game_Interpreter.prototype.clear = function() {
    oldGameInterpreter_clear.apply(this, arguments);
    this._commonEventId = 0;
};

var oldGameInterpreter_command123 = Game_Interpreter.prototype.command123;
Game_Interpreter.prototype.command123 = function() {
    if (this._commonEventId > 0) {
        var key = ['common-event', this._commonEventId, this._params[0]];
        $gameSelfSwitches.setValue(key, this._params[1] === 0);
        return true;
    }

    return oldGameInterpreter_command123.apply(this, arguments);
};

var oldGameInterpreter_setupChild = Game_Interpreter.prototype.setupChild;
Game_Interpreter.prototype.setupChild = function(list, eventId) {
    oldGameInterpreter_setupChild.apply(this, arguments);
    this._childInterpreter._commonEventId = eventId;
};


var oldGameCommonEvent_refresh = Game_CommonEvent.prototype.refresh;
Game_CommonEvent.prototype.refresh = function() {
    oldGameCommonEvent_refresh.apply(this, arguments);
    if (this._interpreter) {
      this._interpreter._commonEventId = this._commonEventId;
    }
};

var oldGameCommonEvent_update = Game_CommonEvent.prototype.update;
Game_CommonEvent.prototype.update = function() {
    if (this._interpreter) {
        if (!this._interpreter.isRunning()) {
            this._interpreter.setup(this.list());
            this._interpreter._commonEventId = this._commonEventId;
        }
        this._interpreter.update();
    }
};