feat: restore hooks for flags, quest progress, switch state

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/GameState.java

@@ -1,5 +1,6 @@
 package thb.jeanluc.adventure.game;
 
+import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashSet;
 import java.util.Set;
@@ -24,4 +25,10 @@ public class GameState {
     public Set<String> all() {
         return Collections.unmodifiableSet(flags);
     }
+
+    /** Replaces all flags with the given collection (used by load). */
+    public void restore(Collection<String> newFlags) {
+        flags.clear();
+        flags.addAll(newFlags);
+    }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/game/QuestLog.java

@@ -1,5 +1,6 @@
 package thb.jeanluc.adventure.game;
 
+import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
@@ -46,4 +47,12 @@ public class QuestLog {
     public Set<String> completed() {
         return Collections.unmodifiableSet(completed);
     }
+
+    /** Replaces all progress with the given stage map and completed set (load). */
+    public void restore(Map<String, Integer> stages, Collection<String> completedIds) {
+        stageIndex.clear();
+        stageIndex.putAll(stages);
+        completed.clear();
+        completed.addAll(completedIds);
+    }
 }

Semesterprojekt/src/main/java/thb/jeanluc/adventure/model/item/SwitchableItem.java

@@ -53,4 +53,14 @@ public class SwitchableItem extends Item {
     public boolean isOn() {
         return state;
     }
+
+    /**
+     * Directly sets the on/off state without running effects or printing.
+     * Used only when restoring a saved game.
+     *
+     * @param state the state to restore
+     */
+    public void setState(boolean state) {
+        this.state = state;
+    }
 }