Elevator Saga Take One

elevator.js

{
    init: function(elevators, floors) {
      var waiting_up = new Array(floors.length).fill(0);
      var waiting_down = new Array(floors.length).fill(0);
      
      function bestFloor(waiting) {
          var max_num_waiting = 0;
          var next_floor = 0;
          for(var floor = 0; floor < waiting.length; floor++) {
              var num_waiting = waiting[floor];
              if(num_waiting > 0 && num_waiting > max_num_waiting) {
                  next_floor = floor;
                  max_num_waiting = num_waiting;
              }
          }
          return [max_num_waiting, next_floor];
      }  
        
      function nextFloor(current) {
          var best_up = bestFloor(waiting_up);
          var best_down = bestFloor(waiting_down);
          console.log("best down = " + best_down + " best up = " + best_up);
          if(best_down[0] > best_up[0]) {
              var floor = best_down[1];
              waiting_down[floor] = 0;
              return floor;
          } else {
              var floor = best_up[1];
              waiting_up[floor] = 0;
              return floor;
          }
      }  
        
      elevators.forEach(function(elevator) {
          elevator.on("idle", function() {
            var destinations = elevator.getPressedFloors()
            if(destinations.length > 0) {
                destinations.forEach(function(d) {
                   elevator.goToFloor(d); 
                });
            } else {
               elevator.goToFloor(nextFloor(elevator.currentFloor()));               
            }     
          });          
      });
      floors.forEach(function(floor) {
          floor.on("up_button_pressed", function(f) {
              var n = f.floorNum();
              waiting_up[n] += 1;
              console.log("up queue:" + waiting_up);
              
          });
          floor.on("down_button_pressed", function(f) {
              var n = f.floorNum();
              waiting_down[n] += 1;
              console.log("down queue:" + waiting_down);
          });
      });                
    },
    update: function(dt, elevators, floors) {
        // We normally don't need to do anything here
        
    }

}