Refactor instance suggestions

src/PlaceholderHelper.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
+ */
+
+#ifndef _PLAYERBOT_PLACEHOLDERHELPER_H
+#define _PLAYERBOT_PLACEHOLDERHELPER_H
+
+#include "Common.h"
+#include "Player.h"
+#include "PlayerbotDungeonSuggestionMgr.h"
+
+#include <map>
+
+typedef std::map<std::string, std::string> PlaceholderMap;
+
+class PlaceholderHelper
+{
+    public:
+        static void MapRole(PlaceholderMap& placeholders, Player* bot);
+        static void MapDungeon(
+            PlaceholderMap& placeholders,
+            DungeonSuggestion const* dungeonSuggestion,
+            Player* bot
+        );
+
+    private:
+        struct Insertion
+        {
+            std::ostringstream& out;
+            DungeonSuggestion const* dungeonSuggestion;
+        };
+
+        static void InsertDungeonName(Insertion& insertion);
+        static void InsertDungeonStrategy(Insertion& insertion);
+        static void InsertDifficulty(Insertion& insertion, Player* bot);
+};
+
+#endif