Made quest usable

scripts/CSharp/Common/Quest/QuestManager.cs

@@ -8,7 +8,13 @@ namespace Babushka.scripts.CSharp.Common.Quest;
 using QuestPair = KeyValuePair<QuestResource, QuestStatus>;
 public partial class QuestManager : Node
 {
-    public static QuestManager Instance { get; private set; }
+    public static QuestManager? Instance { get; private set; }
+
+    [Signal]
+    public delegate void QuestBecomesActiveEventHandler(QuestResource questResource);
+
+    [Signal]
+    public delegate void QuestsChangedEventHandler();
 
     public override void _EnterTree()
     {
@@ -16,6 +22,8 @@ public partial class QuestManager : Node
     }
 
     private Godot.Collections.Dictionary<QuestResource, QuestStatus> _questStatus = new();
+    
+    private QuestResource? _followQuest;
 
 
     public void ChangeQuestStatus(QuestResource questResource, QuestStatus.Status newStatus)
@@ -27,6 +35,13 @@ public partial class QuestManager : Node
         }
 
         value.status = newStatus;
+
+        EmitSignalQuestsChanged();
+
+        if (newStatus == QuestStatus.Status.Active)
+        {
+            EmitSignalQuestBecomesActive(questResource);
+        }
     }
 
     public IEnumerable<QuestPair> GetVisibleQuests()
@@ -38,4 +53,24 @@ public partial class QuestManager : Node
     {
         return _questStatus.Where(qs => qs.Value.status == QuestStatus.Status.Active);
     }
+    public QuestStatus GetQuestStatus(QuestResource questResource)
+    {
+        if (_questStatus.TryGetValue(questResource, out var status))
+            return status;
+        
+        status = new QuestStatus();
+        _questStatus.Add(questResource, status);
+        return status;
+    }
+
+    public QuestResource? GetFollowQuest()
+    {
+        return _followQuest;
+    }
+
+    public void SetFollowQuest(QuestResource? questResource)
+    {
+        _followQuest = questResource;
+        EmitSignalQuestsChanged();
+    }
 }