refactor: javadoc and dependencies in HashMap

completed Tests for GardenScheduleTest and new Structure of Task

src/main/java/ch/zhaw/gartenverwaltung/CropDetailController.java

@@ -104,16 +104,16 @@ public class CropDetailController {
      * open dialog to set area
      */
     @FXML
-    void setArea() {
-
+    void setArea() throws IOException {
+        openTextFieldDialog("set Text Area", "Text Area", area_label.getText(), false);
     }
 
     /**
      * open dialog to set location
      */
     @FXML
-    void setLocation() {
-
+    void setLocation() throws IOException {
+        openTextFieldDialog("set Location", "Location", location_label.getText(), true);
     }
 
     /**
@@ -218,6 +218,7 @@ public class CropDetailController {
         setIconToButton(edit, "editIcon.png");
         setIconToButton(delete, "deleteIcon.png");
         edit.setOnAction(getEditTaskEvent(task));
+        delete.setOnAction(deleteTask(task));
 
         hBox.getChildren().addAll(taskName, taskDescription, edit, delete);
         return hBox;
@@ -260,6 +261,12 @@ public class CropDetailController {
         };
     }
 
+    private EventHandler<ActionEvent> deleteTask(Task task) {
+        return (event) -> {
+            showDeleteTask(task);
+        };
+    }
+
     private void createTaskDialog(boolean newTask, Task givenTask) throws IOException {
         Dialog<Task> dialog = new Dialog<>();
         dialog.setTitle("Set Task");
@@ -278,6 +285,7 @@ public class CropDetailController {
 
         if (appLoader.loadPaneToDialog("TaskFormular.fxml", dialogPane) instanceof TaskFormularController controller) {
             controller.setCorp(this.crop);
+            controller.initSaveButton((Button) dialogPane.lookupButton(saveTask));
             if (!newTask) {
                 controller.setTaskValue(givenTask);
             }
@@ -300,4 +308,56 @@ public class CropDetailController {
         }
 
     }
+
+    private void openTextFieldDialog(String title, String labelDescription, String value, boolean isLocation) throws IOException {
+        Dialog<String> dialog = new Dialog<>();
+        dialog.setTitle(title);
+        dialog.setHeaderText(title);
+        dialog.setResizable(false);
+
+        DialogPane dialogPane = dialog.getDialogPane();
+
+        ButtonType save = new ButtonType("Save", ButtonBar.ButtonData.OK_DONE);
+        dialogPane.getButtonTypes().addAll(save, ButtonType.CANCEL);
+
+        if (appLoader.loadPaneToDialog("TextFieldFormular.fxml", dialogPane) instanceof TextFieldFormularController controller) {
+            controller.setDescription_label(labelDescription);
+            controller.setValueTextArea(value);
+            controller.initSaveButton((Button) dialogPane.lookupButton(save));
+
+            dialog.setResultConverter(button -> button.equals(save) ? controller.getValue() : null);
+
+            dialog.showAndWait()
+                    .ifPresent(string -> {
+                        if (isLocation) {
+                            System.out.println(string);
+                            //ToDo method to set location
+                            location_label.setText(string);
+                        } else {
+                            System.out.println(string);
+                            //ToDo method to set area of crop in garden
+                            area_label.setText(string);
+                        }
+                    });
+        }
+    }
+
+    private void showDeleteTask(Task task) {
+        Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
+        alert.setTitle("Delete " + task.getName());
+        alert.setHeaderText("Are you sure want to delete this Task?");
+
+        alert.showAndWait()
+                .ifPresent(buttonType -> {
+                    if (buttonType == ButtonType.OK) {
+                        try {
+                            gardenSchedule.removeTask(task);
+                            setTaskListProperty(this.crop);
+                        } catch (IOException e) {
+                            // TODO: Show error alert
+                            LOG.log(Level.SEVERE, "Could not remove crop.", e);
+                        }
+                    }
+                });
+    }
 }

src/main/java/ch/zhaw/gartenverwaltung/HelloController.java

@@ -1,14 +0,0 @@
-package ch.zhaw.gartenverwaltung;
-
-import javafx.fxml.FXML;
-import javafx.scene.control.Label;
-
-public class HelloController {
-    @FXML
-    private Label welcomeText;
-
-    @FXML
-    protected void onHelloButtonClick() {
-        welcomeText.setText("Welcome to JavaFX Application!");
-    }
-}

src/main/java/ch/zhaw/gartenverwaltung/MainFXMLController.java

@@ -11,6 +11,9 @@ import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
 import javafx.scene.layout.AnchorPane;
 import javafx.scene.layout.Pane;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import javafx.stage.WindowEvent;
 
 import java.io.IOException;
 import java.util.logging.Level;
@@ -40,6 +43,9 @@ public class MainFXMLController {
     @FXML
     private Button tutorial_button;
 
+    private final Stage tutorialModal = new Stage();
+
+
     /**
      * go to home pane
      */
@@ -95,11 +101,23 @@ public class MainFXMLController {
     }
 
     /**
-     * go to Tutorial pane
+     * Show the tutorial window
      */
-    public void goToTutorial() {
-        showPaneAsMainView("Tutorial.fxml");
-        styleChangeButton(tutorial_button);
+    public void showTutorial() {
+        if (!tutorialModal.isShowing()) {
+            if (tutorialModal.getScene() == null) {
+                try {
+                    appLoader.loadSceneToStage("Tutorial.fxml", tutorialModal);
+                    tutorialModal.initModality(Modality.NONE);
+                    tutorialModal.setResizable(false);
+                    tutorialModal.sizeToScene();
+                } catch (IOException e) {
+                    LOG.log(Level.SEVERE, "Could not load Tutorial");
+                }
+            }
+            tutorialModal.show();
+        }
+        tutorialModal.requestFocus();
     }
 
     /**
@@ -132,7 +150,6 @@ public class MainFXMLController {
         appLoader.loadAndCacheFxml("MyGarden.fxml");
         appLoader.loadAndCacheFxml("MySchedule.fxml");
         appLoader.loadAndCacheFxml("Plants.fxml");
-        appLoader.loadAndCacheFxml("Tutorial.fxml");
     }
 
     private void styleChangeButton(Button button) {
@@ -153,12 +170,14 @@ public class MainFXMLController {
         } catch (IOException e) {
             LOG.log(Level.SEVERE, "Failed to load FXML-Pane!", e);
         }
+        mainPane.getScene().getWindow().setOnCloseRequest(this::closeWindowHandler);
         setIconToButton(home_button, "homeIcon.png");
         setIconToButton(settings_button, "settingsIcon.png");
-        Settings.getInstance().getShowTutorialProperty().addListener((observable, oldValue, newValue) -> {
-            tutorial_button.setVisible(newValue);
-        });
-        tutorial_button.setVisible(Settings.getInstance().getShowTutorial());
+        tutorial_button.visibleProperty().bind(Settings.getInstance().getShowTutorialProperty());
+    }
+
+    private void closeWindowHandler(WindowEvent windowEvent) {
+        tutorialModal.close();
     }
 
     /**
@@ -173,7 +192,4 @@ public class MainFXMLController {
         imageView.setPreserveRatio(true);
         button.setGraphic(imageView);
     }
-
-
 }
-

src/main/java/ch/zhaw/gartenverwaltung/TaskFormularController.java

@@ -2,12 +2,14 @@ package ch.zhaw.gartenverwaltung;
 
 import ch.zhaw.gartenverwaltung.types.Crop;
 import ch.zhaw.gartenverwaltung.types.Task;
+import javafx.beans.binding.Binding;
+import javafx.beans.binding.Bindings;
+import javafx.beans.binding.BooleanBinding;
+import javafx.beans.value.ChangeListener;
+import javafx.beans.value.ObservableValue;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
-import javafx.scene.control.DateCell;
-import javafx.scene.control.DatePicker;
-import javafx.scene.control.TextArea;
-import javafx.scene.control.TextField;
+import javafx.scene.control.*;
 import javafx.util.Callback;
 
 import java.net.URL;
@@ -56,7 +58,7 @@ public class TaskFormularController implements Initializable {
         }
     }
 
-    private Callback<DatePicker, DateCell> getDayCellFactory() {
+    private Callback<DatePicker, DateCell> getDayCellFactoryStartDate() {
 
         return (datePicker) -> new DateCell() {
             private final LocalDate today = LocalDate.now();
@@ -71,16 +73,61 @@ public class TaskFormularController implements Initializable {
                     setDisable(false);
                     setStyle("-fx-background-color: #32CD32;");
                 }
+
+                if (end_datePicker.getValue() != null && item.compareTo(end_datePicker.getValue()) > 0) {
+                    setDisable(true);
+                    setStyle("-fx-background-color: #ffc0cb;");
+                }
             }
         };
     }
 
+    private Callback<DatePicker, DateCell> getDayCellFactoryEndDate() {
+
+        return (datePicker) -> new DateCell() {
+            private final LocalDate today = LocalDate.now();
+
+            @Override
+            public void updateItem(LocalDate item, boolean empty) {
+                super.updateItem(item, empty);
+                setDisable(true);
+                setStyle("-fx-background-color: #ffc0cb;");
+
+                if (item.compareTo(today) > 0 && item.compareTo(crop.getStartDate()) > 0) {
+                    setDisable(false);
+                    setStyle("-fx-background-color: #32CD32;");
+                }
+
+                if (start_datePicker.getValue() != null && item.compareTo(start_datePicker.getValue()) < 0) {
+                    setDisable(true);
+                    setStyle("-fx-background-color: #ffc0cb;");
+                }
+            }
+        };
+    }
+
+    public void initSaveButton(Button button) {
+        interval_field.textProperty().addListener((observable, oldValue, newValue) -> {
+            if (!newValue.matches("\\d*")) {
+                interval_field.setText(newValue.replaceAll("[^\\d]", ""));
+            }
+        });
+
+        button.disableProperty().bind(start_datePicker.valueProperty().isNull()
+                .or(end_datePicker.valueProperty().isNull())
+                .or(taskName_field.textProperty().isEmpty())
+                .or(description_area.textProperty().isEmpty())
+                .or(interval_field.textProperty().isEmpty()));
+
+
+    }
+
     @Override
     public void initialize(URL location, ResourceBundle resources) {
-        start_datePicker.setDayCellFactory(getDayCellFactory());
+        start_datePicker.setDayCellFactory(getDayCellFactoryStartDate());
         start_datePicker.setEditable(false);
 
-        end_datePicker.setDayCellFactory(getDayCellFactory());
+        end_datePicker.setDayCellFactory(getDayCellFactoryEndDate());
         end_datePicker.setEditable(false);
     }
 }

src/main/java/ch/zhaw/gartenverwaltung/TextFieldFormularController.java

@@ -0,0 +1,32 @@
+package ch.zhaw.gartenverwaltung;
+
+import javafx.fxml.FXML;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.TextField;
+
+public class TextFieldFormularController {
+
+    @FXML
+    private Label description_label;
+
+    @FXML
+    private TextField text_area;
+
+
+    public void setDescription_label(String string) {
+        description_label.setText(string);
+    }
+
+    public void setValueTextArea(String string) {
+        text_area.setText(string);
+    }
+
+    public String getValue() {
+        return text_area.getText();
+    }
+
+    public void initSaveButton(Button button) {
+        button.disableProperty().bind(text_area.textProperty().isEmpty());
+    }
+}

src/main/java/ch/zhaw/gartenverwaltung/TutorialController.java

@@ -1,6 +1,61 @@
 package ch.zhaw.gartenverwaltung;
 
 
+import javafx.fxml.FXML;
+import javafx.scene.control.Button;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.layout.StackPane;
+import javafx.stage.Stage;
+
 public class TutorialController {
 
+    @FXML
+    public Button previousPageButton;
+    @FXML
+    public Button nextPageButton;
+    @FXML
+    public StackPane tourPages;
+    public ImageView imgAddNewPlant;
+    public ImageView imgTaskList;
+    public ImageView imgSelectDate;
+
+    private int page = 0;
+
+    @FXML
+    public void initialize() {
+        switchViews();
+        setButtonAbilities();
+
+        Image placeholder = new Image(String.valueOf(PlantsController.class.getResource("placeholder.png")));
+        imgAddNewPlant.setImage(placeholder);
+        imgSelectDate.setImage(placeholder);
+        imgTaskList.setImage(placeholder);
+    }
+
+    public void viewNextPage() {
+        page++;
+        switchViews();
+        setButtonAbilities();
+    }
+    public void viewPreviousPage() {
+        page--;
+        switchViews();
+        setButtonAbilities();
+    }
+
+    private void setButtonAbilities() {
+        previousPageButton.setDisable(page <= 0);
+        nextPageButton.setDisable(page >= tourPages.getChildren().size() - 1);
+    }
+
+    private void switchViews() {
+        tourPages.getChildren().forEach(node -> node.setOpacity(0));
+        tourPages.getChildren().get(page).setOpacity(1);
+    }
+
+    public void closeTutorial() {
+        Stage root = (Stage) tourPages.getScene().getWindow();
+        root.close();
+    }
 }

src/main/java/ch/zhaw/gartenverwaltung/bootstrap/AfterInject.java

@@ -6,7 +6,7 @@ import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
 /**
- * Annotates a method to be executed after all dependencies annotates with {@link Inject}
+ * Annotates a method to be executed after all dependencies annotated with {@link Inject}
  * have been injected.
  */
 @Retention(RetentionPolicy.RUNTIME)

src/main/java/ch/zhaw/gartenverwaltung/bootstrap/AppLoader.java

@@ -23,6 +23,10 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
 
+/**
+ * Class responsible for bootstrapping the application wide dependencies
+ * and injecting them into JavaFX Controllers.
+ */
 public class AppLoader {
     /**
      * Caching the panes
@@ -32,17 +36,24 @@ public class AppLoader {
     /**
      * Application-wide dependencies
      */
-    private final PlantList plantList = new JsonPlantList();
-    private final CropList cropList = new JsonCropList();
-    private final TaskList taskList = new JsonTaskList();
-
-    private final GardenSchedule gardenSchedule = new GardenSchedule(taskList, plantList);
-    private final Garden garden = new Garden(gardenSchedule, cropList);
-
+    private final Map<String, Object> dependencies = new HashMap<>();
 
     public AppLoader() throws IOException {
-    }
+        PlantList plantList = new JsonPlantList();
+        CropList cropList = new JsonCropList();
+        TaskList taskList = new JsonTaskList();
+        GardenSchedule gardenSchedule = new GardenSchedule(taskList, plantList);
 
+        dependencies.put(PlantList.class.getSimpleName(), plantList);
+        dependencies.put(CropList.class.getSimpleName(), cropList);
+        dependencies.put(TaskList.class.getSimpleName(), taskList);
+
+        dependencies.put(PlantListModel.class.getSimpleName(), new PlantListModel(plantList));
+
+        dependencies.put(GardenSchedule.class.getSimpleName(), gardenSchedule);
+        dependencies.put(Garden.class.getSimpleName(), new Garden(gardenSchedule, cropList));
+        dependencies.put(AppLoader.class.getSimpleName(), this);
+    }
 
     /**
      * Loads and returns a {@link Pane} (cached).
@@ -73,7 +84,10 @@ public class AppLoader {
     public Object loadSceneToStage(String fxmlFile, Stage appendee) throws IOException {
         FXMLLoader loader = new FXMLLoader(Objects.requireNonNull(HelloApplication.class.getResource(fxmlFile)));
         Pane root = loader.load();
-        appendee.setScene(new Scene(root));
+        Scene scene = new Scene(root);
+        String css = Objects.requireNonNull(this.getClass().getResource("styles.css")).toExternalForm();
+        appendee.setScene(scene);
+        scene.getStylesheets().add(css);
         Object controller = loader.getController();
         annotationInject(controller);
         return controller;
@@ -132,26 +146,18 @@ public class AppLoader {
                 });
 
         Arrays.stream(controller.getClass().getMethods())
-                .filter(method -> method.isAnnotationPresent(AfterInject.class))
+                .filter(method -> method.isAnnotationPresent(AfterInject.class) && method.getParameterCount() == 0)
                 .forEach(afterInjectMethod -> {
-                    if (afterInjectMethod.getParameterCount() == 0) {
-                        try {
-                            afterInjectMethod.invoke(controller);
-                        } catch (IllegalAccessException | InvocationTargetException e) {
-                            e.printStackTrace();
-                        }
+                    try {
+                        afterInjectMethod.invoke(controller);
+                    } catch (IllegalAccessException | InvocationTargetException e) {
+                        // TODO: Log
+                        e.printStackTrace();
                     }
                 });
     }
 
     private Object getAppDependency(Class<?> type) {
-        return switch (type.getSimpleName()) {
-            case "Garden" -> garden;
-            case "PlantList" -> plantList;
-            case "PlantListModel" -> new PlantListModel(plantList);
-            case "GardenSchedule" -> gardenSchedule;
-            case "AppLoader" -> this;
-            default -> null;
-        };
+        return dependencies.get(type.getSimpleName());
     }
 }

src/main/java/ch/zhaw/gartenverwaltung/bootstrap/ChangeViewEvent.java

@@ -3,11 +3,20 @@ package ch.zhaw.gartenverwaltung.bootstrap;
 import javafx.event.Event;
 import javafx.event.EventType;
 
+/**
+ * Represents an event that should lead to a view being changed.
+ */
 public class ChangeViewEvent extends Event {
     private final String view;
 
     public static final EventType<ChangeViewEvent> CHANGE_MAIN_VIEW = new EventType<>("CHANGE_MAIN_VIEW");
 
+    /**
+     * Creates an Event that should lead to the main view being changed.
+     *
+     * @param eventType The {@link EventType<ChangeViewEvent>} specifying which view should be changed.
+     * @param view The filename of the View to be changed to
+     */
     public ChangeViewEvent(EventType<? extends Event> eventType, String view) {
         super(eventType);
         this.view = view;

src/main/java/ch/zhaw/gartenverwaltung/bootstrap/Inject.java

@@ -6,7 +6,7 @@ import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
 /**
- * Annotates a Field to be injected from the application-dependencies
+ * Annotates a Field to be injected from the application-dependencies.
  */
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.FIELD)

src/main/java/ch/zhaw/gartenverwaltung/io/CropList.java

@@ -6,6 +6,10 @@ import java.io.IOException;
 import java.util.List;
 import java.util.Optional;
 
+/**
+ * Represents a List of {@link Crop}s.
+ * The interface specifies the operations to add/update and remove entries.
+ */
 public interface CropList {
     /**
      * Yields a list of all {@link Crop}s in the database.

src/main/java/ch/zhaw/gartenverwaltung/io/IdProvider.java

@@ -1,10 +1,18 @@
 package ch.zhaw.gartenverwaltung.io;
 
+/**
+ * Provides an sequential ID starting from the given initial Value.
+ */
 public class IdProvider {
     private long currentId;
     public IdProvider(long initialValue) {
         currentId = initialValue;
     }
+
+    /**
+     * Yields the next ID in the sequence.
+     * @return The next ID
+     */
     public long incrementAndGet() {
         return ++currentId;
     }

src/main/java/ch/zhaw/gartenverwaltung/io/JsonCropList.java

@@ -19,6 +19,11 @@ import java.util.List;
 import java.util.Map;
 import java.util.Optional;
 
+/**
+ * Implements the {@link CropList} interface for reading and writing {@link Crop} objects
+ * from and to a local JSON file.
+ * The reads are cached to minimize file-io operations.
+ */
 public class JsonCropList implements CropList {
     private final URL dataSource;
 
@@ -40,7 +45,7 @@ public class JsonCropList implements CropList {
     }
 
     /**
-     * Default constructor
+     * Default constructor. Uses a file from the app resources.
      */
     public JsonCropList() {
         this.dataSource = getClass().getResource("user-crops.json");

src/main/java/ch/zhaw/gartenverwaltung/io/JsonPlantList.java

@@ -20,8 +20,8 @@ import java.util.Map;
 import java.util.Optional;
 
 /**
- * Implements the {@link PlantList} interface for loading {@link Plant} objects
- * from a JSON file.
+ * Implements the {@link PlantList} interface for reading {@link Plant} objects
+ * from a local JSON file.
  * The reads are cached to minimize file-io operations.
  */
 public class JsonPlantList implements PlantList {
@@ -44,9 +44,17 @@ public class JsonPlantList implements PlantList {
         imageModule.addDeserializer(Image.class, new PlantImageDeserializer());
     }
 
+    /**
+     * Default constructor. Uses a file from the app resources.
+     */
     public JsonPlantList() {
         this.dataSource = getClass().getResource("plantdb.json");
     }
+
+    /**
+     * Constructor to use a specified {@link URL} as a {@link #dataSource}
+     * @param dataSource A {@link URL} to the file to be used as a data source
+     */
     public JsonPlantList(URL dataSource) {
         this.dataSource = dataSource;
     }
@@ -67,7 +75,7 @@ public class JsonPlantList implements PlantList {
     }
 
     /**
-     * @see PlantList#getPlantById(long)
+     * @see PlantList#getPlantById(HardinessZone, long)
      */
     @Override
     public Optional<Plant> getPlantById(HardinessZone zone, long id) throws HardinessZoneNotSetException, IOException {

src/main/java/ch/zhaw/gartenverwaltung/io/JsonTaskList.java

@@ -13,14 +13,15 @@ import java.net.URISyntaxException;
 import java.net.URL;
 import java.time.LocalDate;
 import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
 /**
- * Implements the {@link TaskList} interface for loading and writing {@link Task} objects
- * from and to a JSON file.
+ * Implements the {@link TaskList} interface for reading and writing {@link Task} objects
+ * from and to a local JSON file.
  * The reads are cached to minimize file-io operations.
  */
 public class JsonTaskList implements TaskList {
@@ -29,6 +30,7 @@ public class JsonTaskList implements TaskList {
     private final static String INVALID_DATASOURCE_MSG = "Invalid datasource specified!";
 
     private Map<Long, Task> taskMap = Collections.emptyMap();
+    private final List<TaskListObserver> subscribers = new ArrayList<>();
 
     /**
      * Creating constant objects required to deserialize the {@link LocalDate} classes
@@ -43,9 +45,17 @@ public class JsonTaskList implements TaskList {
         timeModule.addSerializer(LocalDate.class, dateSerializer);
     }
 
+    /**
+     * Default constructor. Uses a file from the app resources.
+     */
     public JsonTaskList() {
         this.dataSource = getClass().getResource("taskdb.json");
     }
+
+    /**
+     * Constructor to use a specified {@link URL} as a {@link #dataSource}
+     * @param dataSource A {@link URL} to the file to be used as a data source
+     */
     public JsonTaskList(URL dataSource) {
         this.dataSource = dataSource;
     }
@@ -87,6 +97,7 @@ public class JsonTaskList implements TaskList {
             loadTaskListFromFile();
         }
         taskMap.values().removeIf(task -> task.getCropId() == cropId);
+        notifySubscribers();
     }
 
     /**
@@ -107,6 +118,7 @@ public class JsonTaskList implements TaskList {
 
         taskMap.put(id, task.withId(id));
         writeTaskListToFile();
+        notifySubscribers();
     }
 
     /**
@@ -126,6 +138,25 @@ public class JsonTaskList implements TaskList {
             taskMap.remove(taskId);
             writeTaskListToFile();
         }
+        notifySubscribers();
+    }
+
+    /**
+     * {@inheritDoc}
+     * @param observer The change handler
+     */
+    @Override
+    public void subscribe(TaskListObserver observer) {
+        subscribers.add(observer);
+    }
+
+    /**
+     * Calls the change handler method on all registered observers.
+     */
+    private void notifySubscribers() {
+        for (TaskListObserver subscriber : subscribers) {
+            subscriber.onChange(taskMap.values().stream().toList());
+        }
     }
 
     /**

src/main/java/ch/zhaw/gartenverwaltung/io/PlantList.java

@@ -8,7 +8,7 @@ import java.util.List;
 import java.util.Optional;
 
 /**
- * A database of {@link Plant}s.
+ * A List of {@link Plant}s.
  * The interface specifies the minimal required operations.
  */
 public interface PlantList {

src/main/java/ch/zhaw/gartenverwaltung/io/TaskList.java

@@ -7,8 +7,8 @@ import java.time.LocalDate;
 import java.util.List;
 
 /**
- * A database of {@link Task}s.
- * The interface specifies the minimal required operations.
+ * Represents a List of {@link Task}s.
+ * The interface specifies the operations to add/update and remove entries.
  */
 public interface TaskList {
     /**
@@ -51,4 +51,22 @@ public interface TaskList {
      * @throws IOException If the database cannot be accessed
      */
     void removeTask(Task task) throws IOException;
+
+    /**
+     * Registers an observer to be notified of Changes in the TaskList
+     * @param observer The change handler
+     */
+    void subscribe(TaskListObserver observer);
+
+    /**
+     * Specifies an observer for a TaskList
+     */
+    @FunctionalInterface
+    interface TaskListObserver {
+        /**
+         * Method which will be called when changes occur.
+         * @param newTaskList The new values
+         */
+        void onChange(List<Task> newTaskList);
+    }
 }

src/main/java/ch/zhaw/gartenverwaltung/json/GrowthPhaseTypeDeserializer.java

@@ -7,6 +7,9 @@ import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
 
 import java.io.IOException;
 
+/**
+ * Used by the Jackson Library to deserialize a String to a {@link GrowthPhaseType}
+ */
 public class GrowthPhaseTypeDeserializer extends StdDeserializer<GrowthPhaseType> {
     public GrowthPhaseTypeDeserializer(Class<?> vc) {
         super(vc);

src/main/java/ch/zhaw/gartenverwaltung/json/HardinessZoneDeserializer.java

@@ -7,6 +7,9 @@ import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
 
 import java.io.IOException;
 
+/**
+ * Used by the Jackson Library to deserialize a String to a {@link HardinessZone}
+ */
 public class HardinessZoneDeserializer extends StdDeserializer<HardinessZone> {
     public HardinessZoneDeserializer(Class<?> vc) {
         super(vc);

src/main/java/ch/zhaw/gartenverwaltung/json/PlantImageDeserializer.java

@@ -13,6 +13,9 @@ import java.io.InputStream;
 import java.net.URISyntaxException;
 import java.net.URL;
 
+/**
+ * Used by the Jackson Library to deserialize a String to a {@link Image}
+ */
 public class PlantImageDeserializer extends JsonDeserializer<Image> {
 
     @Override

src/main/java/ch/zhaw/gartenverwaltung/types/TaskTemplate.java

@@ -44,6 +44,10 @@ public class TaskTemplate {
     public Task generateTask(LocalDate realStartDate, long cropId) {
         LocalDate endDate = relativeEndDate != null ? realStartDate.plusDays(relativeEndDate) : null;
 
+        if (interval == null) {
+            this.interval = 0;
+        }
+
         return new Task(name, description, realStartDate.plusDays(relativeStartDate), cropId)
                 .withInterval(interval)
                 .withEndDate(endDate);

src/main/resources/ch/zhaw/gartenverwaltung/MainFXML.fxml

@@ -12,7 +12,7 @@
             <Button fx:id="home_button" mnemonicParsing="false" onAction="#goToHome" prefHeight="38.0" prefWidth="40.0" HBox.hgrow="NEVER" />
             <Button fx:id="myGarden_button" layoutX="10.0" layoutY="10.0" mnemonicParsing="false" onAction="#goToMyPlants" prefHeight="38.0" prefWidth="121.0" text="My Garden" />
             <Button fx:id="mySchedule_button" layoutX="10.0" layoutY="10.0" mnemonicParsing="false" onAction="#goToMySchedule" prefHeight="38.0" prefWidth="121.0" text="My Schedule" />
-            <Button fx:id="tutorial_button" layoutX="10.0" layoutY="10.0" mnemonicParsing="false" onAction="#goToTutorial" prefHeight="38.0" prefWidth="121.0" text="Tutorial" />
+            <Button fx:id="tutorial_button" layoutX="10.0" layoutY="10.0" mnemonicParsing="false" onAction="#showTutorial" prefHeight="38.0" prefWidth="121.0" text="Tutorial" />
             <Pane maxWidth="1.7976931348623157E308" prefHeight="200.0" prefWidth="200.0" HBox.hgrow="ALWAYS" />
             <Button fx:id="settings_button" maxHeight="1.7976931348623157E308" mnemonicParsing="false" onAction="#openSettings" prefHeight="38.0" prefWidth="40.0" HBox.hgrow="NEVER" />
          </children>

src/main/resources/ch/zhaw/gartenverwaltung/TextFieldFormular.fxml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.geometry.Insets?>
+<?import javafx.scene.control.Label?>
+<?import javafx.scene.control.TextField?>
+<?import javafx.scene.layout.AnchorPane?>
+<?import javafx.scene.layout.HBox?>
+
+
+<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="64.0" prefWidth="298.0" xmlns="http://javafx.com/javafx/17"
+            xmlns:fx="http://javafx.com/fxml/1" fx:controller="ch.zhaw.gartenverwaltung.TextFieldFormularController">
+   <children>
+      <HBox alignment="CENTER" layoutX="153.0" layoutY="33.0" prefHeight="100.0" prefWidth="200.0" spacing="10.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
+         <children>
+            <Label fx:id="description_label" maxWidth="1.7976931348623157E308" text="Label" HBox.hgrow="ALWAYS" />
+            <TextField fx:id="text_area" HBox.hgrow="NEVER" />
+         </children>
+         <padding>
+            <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
+         </padding>
+      </HBox>
+   </children>
+</AnchorPane>

src/main/resources/ch/zhaw/gartenverwaltung/Tutorial.fxml

@@ -1,27 +1,141 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
 <?import javafx.geometry.Insets?>
-<?import javafx.scene.control.Label?>
-<?import javafx.scene.layout.AnchorPane?>
+<?import javafx.scene.control.Button?>
+<?import javafx.scene.control.ButtonBar?>
+<?import javafx.scene.control.CheckBox?>
+<?import javafx.scene.control.Separator?>
+<?import javafx.scene.image.ImageView?>
+<?import javafx.scene.layout.BorderPane?>
+<?import javafx.scene.layout.HBox?>
+<?import javafx.scene.layout.StackPane?>
 <?import javafx.scene.layout.VBox?>
 <?import javafx.scene.text.Font?>
+<?import javafx.scene.text.Text?>
+<?import javafx.scene.text.TextFlow?>
 
-
-<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/17"
-            xmlns:fx="http://javafx.com/fxml/1" fx:controller="ch.zhaw.gartenverwaltung.TutorialController">
-   <children>
-      <VBox layoutX="7.0" layoutY="8.0" prefHeight="200.0" prefWidth="100.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
+<BorderPane maxHeight="470.0" maxWidth="724.0" minHeight="470.0" minWidth="724.0" prefHeight="470.0" prefWidth="724.0" xmlns="http://javafx.com/javafx/17" xmlns:fx="http://javafx.com/fxml/1" fx:controller="ch.zhaw.gartenverwaltung.TutorialController">
+   <bottom>
+      <HBox alignment="CENTER" prefHeight="0.0" prefWidth="724.0" BorderPane.alignment="CENTER">
          <children>
-            <Label text="Tutorial">
-               <font>
-                  <Font size="18.0" />
-               </font>
-            </Label>
-            <Label text="To be added" />
+            <CheckBox mnemonicParsing="false" text="Don't show again" />
+            <Separator prefWidth="50.0" visible="false" HBox.hgrow="ALWAYS" />
+            <ButtonBar prefHeight="40.0" prefWidth="200.0">
+              <buttons>
+                  <Button cancelButton="true" contentDisplay="CENTER" graphicTextGap="5.0" mnemonicParsing="false" text="Close" onAction="#closeTutorial"/>
+                <Button fx:id="previousPageButton" mnemonicParsing="false" text="Previous" onAction="#viewPreviousPage"/>
+                  <Button fx:id="nextPageButton" defaultButton="true" mnemonicParsing="false" text="Next" onAction="#viewNextPage" />
+              </buttons>
+            </ButtonBar>
          </children>
          <padding>
-            <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
+            <Insets bottom="15.0" left="15.0" right="15.0" top="15.0" />
          </padding>
-      </VBox>
-   </children>
-</AnchorPane>
+      </HBox>
+   </bottom>
+   <center>
+      <StackPane fx:id="tourPages" prefHeight="150.0" prefWidth="200.0" BorderPane.alignment="CENTER">
+         <children>
+            <VBox layoutX="30.0" layoutY="26.0" opacity="0.0" prefHeight="200.0" prefWidth="100.0">
+               <children>
+                  <Text strokeType="OUTSIDE" strokeWidth="0.0" text="Managing Your Crops">
+                     <font>
+                        <Font size="24.0" />
+                     </font>
+                  </Text>
+                  <Separator prefWidth="200.0">
+                     <VBox.margin>
+                        <Insets bottom="15.0" top="10.0" />
+                     </VBox.margin>
+                  </Separator>
+                  <Text strokeType="OUTSIDE" strokeWidth="0.0" text="In the &quot;My Garden&quot; tab, you can see all of the plants you're planning on growing.">
+                     <VBox.margin>
+                        <Insets bottom="20.0" />
+                     </VBox.margin>
+                  </Text>
+                  <HBox prefHeight="100.0" prefWidth="200.0">
+                     <children>
+                        <TextFlow lineSpacing="4.0" prefHeight="90.0" prefWidth="500.0">
+                           <children>
+                              <Text strokeType="OUTSIDE" strokeWidth="0.0" text="To get started, click on the &quot;Add new Plant&quot; button in the bottom left. This will open a list of all the plants you can grow.&#10;Use the search bar at the top, the filters on the left, or simply browse the list until you've found a plant you want to grow in your garden." wrappingWidth="345.80316162109375" />
+                           </children>
+                           <HBox.margin>
+                              <Insets bottom="20.0" />
+                           </HBox.margin>
+                        </TextFlow>
+                        <Separator prefWidth="200.0" visible="false" HBox.hgrow="ALWAYS" />
+                        <ImageView fx:id="imgAddNewPlant" fitHeight="98.0" fitWidth="200.0" pickOnBounds="true" preserveRatio="true" />
+                     </children>
+                  </HBox>
+                  <HBox prefHeight="100.0" prefWidth="200.0">
+                     <children>
+                        <TextFlow lineSpacing="4.0" prefHeight="200.0" prefWidth="500.0">
+                           <children>
+                              <Text strokeType="OUTSIDE" strokeWidth="0.0" text="Once you've found what you're looking for, click the &quot;Select Sow/Harvest Date&quot; button at the bottom of the window.&#10;In the subsequently shown dialog, you can select the date you'd like to sow or harvest the crop. The date selector shows possible dates in green. Confirm your selection with the &quot;Save&quot; button." />
+                           </children>
+                        </TextFlow>
+                        <Separator prefWidth="200.0" visible="false" HBox.hgrow="ALWAYS" />
+                        <ImageView fx:id="imgSelectDate" fitHeight="150.0" fitWidth="200.0" pickOnBounds="true" preserveRatio="true" />
+                     </children>
+                  </HBox>
+               </children>
+               <opaqueInsets>
+                  <Insets />
+               </opaqueInsets>
+            </VBox>
+            <VBox prefHeight="200.0" prefWidth="100.0">
+               <children>
+                  <Text strokeType="OUTSIDE" strokeWidth="0.0" text="Managing Your Tasks">
+                     <font>
+                        <Font size="24.0" />
+                     </font>
+                  </Text>
+                  <Separator prefWidth="200.0">
+                     <VBox.margin>
+                        <Insets bottom="15.0" top="10.0" />
+                     </VBox.margin>
+                  </Separator>
+                  <Text strokeType="OUTSIDE" strokeWidth="0.0" text="In the &quot;My Schedule&quot; tab, you can see all of the tasks you need to complete for a successful harvest.">
+                     <VBox.margin>
+                        <Insets bottom="20.0" />
+                     </VBox.margin>
+                  </Text>
+                  <HBox prefHeight="100.0" prefWidth="200.0">
+                     <children>
+                        <TextFlow lineSpacing="4.0" prefHeight="90.0" prefWidth="500.0">
+                           <children>
+                              <Text strokeType="OUTSIDE" strokeWidth="0.0" text="You can view the tasks for a specific crop by selecting it from the left sidebar.&#10;To see all tasks again, click the &quot;Clear Filter&quot; button at the bottom." wrappingWidth="345.80316162109375" />
+                           </children>
+                           <HBox.margin>
+                              <Insets bottom="20.0" />
+                           </HBox.margin>
+                        </TextFlow>
+                        <Separator prefWidth="200.0" visible="false" HBox.hgrow="ALWAYS" />
+                        <ImageView fx:id="imgTaskList" fitHeight="98.0" fitWidth="200.0" pickOnBounds="true" preserveRatio="true" />
+                     </children>
+                  </HBox>
+                  <HBox prefHeight="100.0" prefWidth="200.0">
+                     <children>
+                        <TextFlow lineSpacing="4.0" prefHeight="200.0" prefWidth="500.0">
+                           <children>
+                              <Text strokeType="OUTSIDE" strokeWidth="0.0" text="You can also add your own custom tasks, by clicking the &quot;Add Task&quot; button.&#10;In the subsequently shown dialog, you can enter the corresponding details.&#10;&#10;Note: If you want to make a task recurring, you need to set both an interval (in days) AND an end date, so the task won't repeat for all eternity." />
+                           </children>
+                        </TextFlow>
+                        <Separator prefWidth="200.0" visible="false" HBox.hgrow="ALWAYS" />
+                        <ImageView fitHeight="150.0" fitWidth="200.0" pickOnBounds="true" preserveRatio="true" />
+                     </children></HBox>
+               </children>
+               <opaqueInsets>
+                  <Insets />
+               </opaqueInsets>
+            </VBox>
+         </children>
+         <BorderPane.margin>
+            <Insets />
+         </BorderPane.margin>
+         <padding>
+            <Insets bottom="20.0" left="20.0" right="20.0" top="20.0" />
+         </padding>
+      </StackPane>
+   </center>
+</BorderPane>

src/main/resources/ch/zhaw/gartenverwaltung/bootstrap/styles.css

@@ -0,0 +1,6 @@
+.button{
+    -fx-text-fill: rgb(49, 89, 23);
+    -fx-border-color: rgb(49, 89, 23);
+    -fx-border-radius: 5;
+    -fx-padding: 3 6 6 6;
+}