elevator.saga.js

{
  init(elevators, floors) {
    function leastLoadedElevator() {
      // Find elevator with lowest load factor
      let elevatorIndex = 0;
      let minLoad = 9999999;
      elevators.forEach((elevator, index) => {
        const currentLoad = elevator.loadFactor();
        if (currentLoad < minLoad) {
          minLoad = currentLoad;
          elevatorIndex = index;
        }
      });

      return elevators[elevatorIndex];
    }

    elevators.forEach(function(elevator) {
      elevator.on("idle", function() {
        const pressedFloors = elevator.getPressedFloors();

        if (pressedFloors && pressedFloors.length > 0) {
          // You are idle but somebody pressed a floor
          const nextFloor = pressedFloors[0];
          elevator.goToFloor(nextFloor);
        } else {
          // You are idle but no one pressed anything
          elevator.goToFloor(3);
        }
      });
    });

    floors.forEach(function(floor) {
      floor.on("up_button_pressed", function() {
        const elevator = leastLoadedElevator();
        elevator.goToFloor(floor.level);
      });

      floor.on("down_button_pressed", function() {
        const elevator = leastLoadedElevator();
        elevator.goToFloor(floor.level);
      });
    });
  },
  update(dt, elevators, floors) {
    // We normally don't need to do anything here
  }
};