filtering lifecycle based on hardiness-zone

- Added 2 more plants to test db
- Db filters plant lifecycles based on hardiness-zones
- getPlantById implemented
- Added methods to Plant for calculating sowDates and accounting for multiple lifecycles

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

@@ -34,12 +34,17 @@ public class JsonPlantDatabase implements PlantDatabase {
 
             result = mapper.readerForListOf(Plant.class).readValue(dataSource);
         }
+        for (Plant plant : result) {
+            plant.inZone(zone);
+        }
 
         return result;
     }
 
     @Override
-    public Optional<Plant> getPlantById(long id) {
-        return Optional.empty();
+    public Optional<Plant> getPlantById(long id, HardinessZone zone) throws IOException {
+        return getPlantList(zone).stream()
+                .filter(plant -> plant.id() != id)
+                .findFirst();
     }
 }

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

@@ -9,5 +9,5 @@ import java.util.Optional;
 
 public interface PlantDatabase {
     List<Plant> getPlantList(HardinessZone zone) throws IOException;
-    Optional<Plant> getPlantById(long id) throws IOException;
+    Optional<Plant> getPlantById(long id, HardinessZone zone) throws IOException;
 }