refactor: first attempt at dependency injection

also some more renaming and improving date-picker dialog

src/main/java/ch/zhaw/gartenverwaltung/models/Garden.java

@@ -2,12 +2,12 @@ package ch.zhaw.gartenverwaltung.models;
 
 import ch.zhaw.gartenverwaltung.io.CropList;
 import ch.zhaw.gartenverwaltung.io.HardinessZoneNotSetException;
-import ch.zhaw.gartenverwaltung.io.JsonCropList;
 import ch.zhaw.gartenverwaltung.types.Crop;
 import ch.zhaw.gartenverwaltung.types.Plant;
 import ch.zhaw.gartenverwaltung.types.Task;
+import javafx.beans.property.ListProperty;
+import javafx.beans.property.SimpleListProperty;
 import javafx.collections.FXCollections;
-import javafx.collections.ObservableList;
 
 import java.io.IOException;
 import java.time.LocalDate;
@@ -19,21 +19,25 @@ import java.util.Optional;
  * The Gardenplan model manages the crops in the gardenplan.
  */
 public class Garden {
-    private CropList cropList;
-    private final ObservableList<Crop> plantedCrops = FXCollections.observableArrayList();
-    private GardenSchedule gardenSchedule;
+    private final CropList cropList;
+    private final ListProperty<Crop> plantedCrops = new SimpleListProperty<>(FXCollections.observableArrayList());
+    private final GardenSchedule gardenSchedule;
 
     /**
      * Constructor of Gardenplan model
      *
      * @param gardenSchedule holds a reference to the task list object.
      */
-    public Garden(GardenSchedule gardenSchedule) throws IOException {
+    public Garden(GardenSchedule gardenSchedule, CropList cropList) throws IOException {
         this.gardenSchedule = gardenSchedule;
-        cropList = new JsonCropList();
+        this.cropList = cropList;
         plantedCrops.addAll(cropList.getCrops());
     }
 
+    public ListProperty<Crop> getPlantedCrops() {
+        return plantedCrops;
+    }
+
     /**
      * Creates a Crop with a {@link Plant} and the planting date of the plant. Then let the Tasklistmodel create the
      * gardening {@link Task} for the crop. Store the crop in the gardenplan file and the cache.

src/main/java/ch/zhaw/gartenverwaltung/models/GardenSchedule.java

@@ -12,19 +12,14 @@ import java.util.List;
 import java.util.stream.Collectors;
 
 public class GardenSchedule {
-    private TaskList taskList;
-    private PlantList plantList;
+    private final TaskList taskList;
+    private final PlantList plantList;
 
     /**
      * Comparators to create sorted Task List
      */
     static final Comparator<Task> sortByStartDate = Comparator.comparing(Task::getStartDate);
 
-    public GardenSchedule(){
-        taskList = new JsonTaskList();
-        plantList = new JsonPlantList();
-    }
-
     /**
      * Constructor to create Database Objects.
      */

src/main/java/ch/zhaw/gartenverwaltung/models/PlantListModel.java

@@ -1,7 +1,6 @@
 package ch.zhaw.gartenverwaltung.models;
 
 import ch.zhaw.gartenverwaltung.io.HardinessZoneNotSetException;
-import ch.zhaw.gartenverwaltung.io.JsonPlantList;
 import ch.zhaw.gartenverwaltung.io.PlantList;
 import ch.zhaw.gartenverwaltung.types.GrowthPhaseType;
 import ch.zhaw.gartenverwaltung.types.HardinessZone;
@@ -16,7 +15,7 @@ import java.util.function.Predicate;
 import java.util.stream.Collectors;
 
 public class PlantListModel {
-    private PlantList plantList;
+    private final PlantList plantList;
     private HardinessZone currentZone;
 
     /**
@@ -28,11 +27,6 @@ public class PlantListModel {
     /**
      * Constructor to create Database Object.
      */
-    public PlantListModel() {
-        plantList = new JsonPlantList();
-        setDefaultZone();
-    }
-
     public PlantListModel(PlantList plantList) {
         this.plantList = plantList;
         setDefaultZone();