started to implement ShoppingList

src/main/java/mi/hdm/mealPlan/MealPlan.java

@@ -7,6 +7,7 @@ import mi.hdm.recipes.Recipe;
  * Allow the user to create a meal plan for the week. The user can check out his nutrition scores for the week.
  */
 public class MealPlan {
+    //TODO: implement class<
     private static final MealPlan mealPlan = new MealPlan();
 
     public static MealPlan getInstance() {

src/main/java/mi/hdm/shoppingList/ShoppingList.java

 package mi.hdm.shoppingList;
 
+import mi.hdm.exceptions.InvalidIngredientException;
 import mi.hdm.recipes.Ingredient;
+import mi.hdm.recipes.IngredientManager;
+import mi.hdm.recipes.NutritionCalculator;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Optional;
 
 /**
  * Shopping list that the user can add ingredients to. The elements on the list can be marked as done or undone.
  */
 public class ShoppingList {
     //TODO: implement class
+
+    private static final Logger log = LogManager.getLogger(ShoppingList.class);
     private final Map<Ingredient, Boolean> list;
 
     private static final ShoppingList shoppingList = new ShoppingList();
@@ -22,13 +30,32 @@ public class ShoppingList {
         return shoppingList;
     }
 
-    public void clear() {}
+    public void clear() {
+        list.clear();
+        log.info("ShoppingList cleared successfully.");
+    }
 
-    public void markDone(int id) {}
+    public void markDone(Ingredient in) {
+        list.put(in, true);
+        log.info("Ingredient {} marked as done", in);
+    }
+    public void markDone(String name){
+        Ingredient in = getIngredientByName(name).orElseThrow(() -> new InvalidIngredientException("No ingredient with name " + name));;
+        markDone(in);
+    }
 
     public void markUndone(int id) {}
 
     public Map<Ingredient, Boolean> getList() {
         return list;
     }
+
+    private Optional<Ingredient> getIngredientByName(String name) {
+        for (final Ingredient i : list.keySet()) {
+            if (name.equals(i.getName())) {
+                return Optional.of(i);
+            }
+        }
+        return Optional.empty();
+    }
 }