user.js

function User(weight) {
    newGuard(this, User);
    Movable.call(this);
    var user = this;
    user.weight = weight;
    user.currentFloor = 0;
    user.destinationFloor = 0;
    user.done = false;
    user.removeMe = false;
};
User.prototype = Object.create(Movable.prototype);


User.prototype.appearOnFloor = function(floor, destinationFloorNum) {
    var floorPosY = floor.getSpawnPosY();
    this.currentFloor = floor.level;
    this.destinationFloor = destinationFloorNum;
    this.moveTo(null, floorPosY);
    this.pressFloorButton(floor);
};

User.prototype.pressFloorButton = function(floor) {
    if(this.destinationFloor < this.currentFloor) {
        floor.pressDownButton();
    } else {
        floor.pressUpButton();
    }
};

User.prototype.handleExit = function(floorNum, elevator) {
    if(elevator.currentFloor === this.destinationFloor) {
        elevator.userExiting(this);
        this.currentFloor = elevator.currentFloor;
        this.setParent(null);
        var destination = this.x + 100;
        this.done = true;
        this.trigger("exited_elevator", elevator);
        this.trigger("new_state");
        this.trigger("new_display_state");
        var self = this;
        this.moveToOverTime(destination, null, 1 + Math.random()*0.5, linearInterpolate, function lastMove() {
            self.removeMe = true;
            self.trigger("removed");
            self.off("*");
        });

        elevator.off("exit_available", this.exitAvailableHandler);
    }
};

User.prototype.elevatorAvailable = function(elevator, floor) {
    if(this.done || this.parent !== null || this.isBusy()) {
        return;
    }

    if(!elevator.isSuitableForTravelBetween(this.currentFloor, this.destinationFloor)) {
        // Not suitable for travel - don't use this elevator
        return;
    }

    var pos = elevator.userEntering(this);
    if(pos) {
        // Success
        this.setParent(elevator);
        this.trigger("entered_elevator", elevator);
        var self = this;
        this.moveToOverTime(pos[0], pos[1], 1, undefined, function() {
            elevator.pressFloorButton(self.destinationFloor);
        });
        this.exitAvailableHandler = function (floorNum, elevator) { self.handleExit(elevator.currentFloor, elevator); };
        elevator.on("exit_available", this.exitAvailableHandler);
    } else {
        this.pressFloorButton(floor);
    }
};