refactor: simplified dayCellFactory for date selector

Instead of generating a list of dates for every single visible date and checking if it is contained in that list, we now use a (admittedly scary-looking) predicate to compare the date to the start and enddates

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

@@ -93,8 +93,9 @@ public class CropDetailController {
 
     }
 
-    public void setPlantFromCrop(Crop crop) throws HardinessZoneNotSetException, IOException, PlantNotFoundException {
+    public void setPlantFromCrop(Crop crop) throws PlantNotFoundException {
         this.crop = crop;
+        try {
             Plant plant = plantList.getPlantById(Settings.getInstance().getCurrentHardinessZone(), crop.getPlantId())
                     .orElseThrow(PlantNotFoundException::new);
 
@@ -110,6 +111,9 @@ public class CropDetailController {
             location_label.setText("");
             createTaskLists(crop);
             createPestList(plant);
+        } catch (HardinessZoneNotSetException | IOException e) {
+            throw new PlantNotFoundException();
+        }
     }
 
     private void createTaskLists(Crop crop) {

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

@@ -108,7 +108,7 @@ public class MyGardenController {
                 stage.initModality(Modality.APPLICATION_MODAL);
                 stage.setResizable(true);
                 stage.showAndWait();
-            } catch (IOException | HardinessZoneNotSetException | PlantNotFoundException e) {
+            } catch (IOException | PlantNotFoundException e) {
                 // TODO: show error alert
                 LOG.log(Level.SEVERE, "Could not load plant details.", e);
             }

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

@@ -7,7 +7,7 @@ import javafx.scene.control.*;
 import javafx.util.Callback;
 
 import java.time.LocalDate;
-import java.util.List;
+import java.time.MonthDay;
 
 public class SelectSowDayController {
     private Plant selectedPlant;
@@ -61,36 +61,49 @@ public class SelectSowDayController {
 
     /**
      * date picker disable/enable dates according to selected plant: sow or harvest day
+     *
      * @return cellFactory of datePicker
      */
     private Callback<DatePicker, DateCell> getDayCellFactory() {
 
         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;");
-                List<LocalDate> dates;
-                LocalDate today = LocalDate.now();
-                if (harvest_radio.isSelected()) {
-                    dates = selectedPlant.getDateListOfGrowthPhase(GrowthPhaseType.HARVEST);
-                } else {
-                    dates = selectedPlant.getDateListOfGrowthPhase(GrowthPhaseType.SOW);
-                }
-                for (LocalDate date : dates) {
-                    if (item.getMonth() == date.getMonth()
-                            && item.getDayOfMonth() == date.getDayOfMonth()
-                            && item.compareTo(today) > 0) {
+
+                if (item.compareTo(today) > 0 && (!harvest_radio.isSelected() || selectedPlant.sowDateFromHarvestDate(item, 0).compareTo(today) >= 0)) {
+                    GrowthPhaseType selectedPhase = harvest_radio.isSelected() ? GrowthPhaseType.HARVEST : GrowthPhaseType.SOW;
+                    MonthDay minDate = selectedPlant.getMinDateForGrowthPhase(selectedPhase);
+                    MonthDay maxDate = selectedPlant.getMaxDateForGrowthPhase(selectedPhase);
+
+                    if (dateInRange(item, minDate, maxDate)) {
                         setDisable(false);
                         setStyle("-fx-background-color: #32CD32;");
                     }
                 }
-                if ((harvest_radio.isSelected() && selectedPlant.sowDateFromHarvestDate(item, 0).compareTo(today) < 0)) {
-                    setDisable(true);
-                    setStyle("-fx-background-color: #ffc0cb;");
-                }
             }
         };
     }
+
+    /**
+     * Checks if the given {@link LocalDate} is within the given {@link MonthDay} range.
+     * (regardless of year)
+     *
+     * @param subject The date to check
+     * @param min The start of the date-range
+     * @param max The end of the date-range
+     * @return Whether the subject is within the range.
+     */
+    private boolean dateInRange(LocalDate subject, MonthDay min, MonthDay max) {
+        return subject.getMonth().compareTo(min.getMonth()) >= 0 &&
+                subject.getMonth().compareTo(max.getMonth()) <= 0 &&
+                // if the day is less than the minimum day, the minimum month must not be equal
+                (subject.getDayOfMonth() >= min.getDayOfMonth() || !subject.getMonth().equals(min.getMonth())) &&
+                // if the day is greater than the maximum day, the maximum month must not be equal
+                (subject.getDayOfMonth() <= max.getDayOfMonth() || !subject.getMonth().equals(max.getMonth()));
+    }
 }

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

@@ -3,7 +3,7 @@ package ch.zhaw.gartenverwaltung.types;
 import javafx.scene.image.Image;
 
 import java.time.LocalDate;
-import java.util.LinkedList;
+import java.time.MonthDay;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -69,37 +69,19 @@ public record Plant(
         return (int) DAYS.between(harvest.startDate().atYear(currentYear), sow.startDate().atYear(currentYear));
     }
 
-    /**
-     * filter out the given growthPhase out of the lifecycle
-     * create list of dates for this growthPhase and return it
-     * @param growthPhase the wanted growthPhase
-     * @return a list of dates of the current year
-     */
-    public List<LocalDate> getDateListOfGrowthPhase(GrowthPhaseType growthPhase) {
-        List<LocalDate> dates = new LinkedList<>();
-        for (GrowthPhase growth : lifecycle) {
-            if (growth.type().equals(growthPhase)) {
-                dates = addDatesFromMonthDay(growth);
-            }
-        }
-        return dates;
-    }
 
-    /**
-     * transform monthDay value of the given growthPhase to localDate
-     * return a list of dates from start to end of growth phase
-     * @param growthPhase the current growthPhase
-     * @return a list of dates of the current year
-     */
-    private List<LocalDate> addDatesFromMonthDay(GrowthPhase growthPhase) {
-        List<LocalDate> dates = new LinkedList<>();
-        LocalDate today = LocalDate.now();
-        LocalDate start = growthPhase.startDate().atYear(today.getYear());
-        LocalDate end = growthPhase.endDate().atYear(today.getYear());
-        while (!start.isAfter(end)) {
-            dates.add(start);
-            start = start.plusDays(1);
+    public MonthDay getMaxDateForGrowthPhase(GrowthPhaseType growthPhase) {
+        return lifecycle.stream()
+                .filter(phase -> phase.type().equals(growthPhase))
+                .findFirst()
+                .map(GrowthPhase::endDate)
+                .orElse(MonthDay.of(12, 31));
     }
-        return dates;
+    public MonthDay getMinDateForGrowthPhase(GrowthPhaseType growthPhase) {
+        return lifecycle.stream()
+                .filter(phase -> phase.type().equals(growthPhase))
+                .findFirst()
+                .map(GrowthPhase::startDate)
+                .orElse(MonthDay.of(1, 1));
     }
 }