GardenPlanner/garden_planner/lib/beet.dart

import 'plant.dart';

class Beet {
  List<BeetRow> beetrows= [BeetRow()];

  void Add(BeetRow beetrow){
    beetrows.add(beetrow);
  }
}

class BeetRow {
  List<Plant> plants= [];

    double get verticalSpace {
      return getMaxVerticalSpace(this);
    }

  double get horizontalSpace {
    return plants.map((plant) => plant.horizontalSpace)
        .reduce((value, element) => value+=element);
  }

    void Add(Plant plant){
      plants.add(plant);
    }
}

double getMaxVerticalSpace(BeetRow beetrow) {
  double maxVerticalSpace = 0;

  for (var plant in beetrow.plants) {
    if (plant.verticalSpace > maxVerticalSpace) {
      maxVerticalSpace = plant.verticalSpace;
    }
  }

  return maxVerticalSpace;
}

double getMaxHorizontalSpace(Beet beet) {
  double maxHorizontalSpace = 0;

  for (var beetrow in beet.beetrows) {
    if (beetrow.horizontalSpace > maxHorizontalSpace) {
      maxHorizontalSpace = beetrow.horizontalSpace;
    }
  }

  return maxHorizontalSpace;
}