Class for adding a customized result to BuiltQuest history

src/games/stendhal/server/entity/npc/quest/BuiltQuest.java

@@ -86,6 +86,7 @@ public List<String> getHistory(Player player) {
 				res.add(completionsShown);
 			}
 		}
+		history.applyOtherResults(player, res);
 		return res;
 	}
 

src/games/stendhal/server/entity/npc/quest/QuestHistoryBuilder.java

@@ -1,5 +1,5 @@
 /***************************************************************************
- *                   (C) Copyright 2022 - Faiumoni e.V.                    *
+ *                 (C) Copyright 2022-2024 - Faiumoni e.V.                 *
  ***************************************************************************
  ***************************************************************************
  *                                                                         *
@@ -11,6 +11,12 @@
  ***************************************************************************/
 package games.stendhal.server.entity.npc.quest;
 
+import java.util.LinkedList;
+import java.util.List;
+
+import games.stendhal.server.entity.player.Player;
+
+
 /**
  * defines the "history" of player progress as shown in the travel log
  *
@@ -25,9 +31,13 @@ public class QuestHistoryBuilder {
 	private String whenQuestCanBeRepeated;
 	private String whenCompletionsShown;
 
+	private List<QuestHistoryResult> otherResults;
+
+
 	// hide constructor
 	QuestHistoryBuilder() {
 		super();
+		otherResults = new LinkedList<>();
 	}
 
 	public QuestHistoryBuilder whenNpcWasMet(String whenNpcWasMet) {
@@ -72,6 +82,16 @@ public QuestHistoryBuilder whenCompletionsShown(String whenCompletionsShown) {
 		return this;
 	}
 
+	/**
+	 * Adds a custom conditional result to history.
+	 *
+	 * @param result
+	 *   History result object to be called when history is requested.
+	 */
+	public void addResult(final QuestHistoryResult result) {
+		otherResults.add(result);
+	}
+
 	String getWhenNpcWasMet() {
 		return whenNpcWasMet;
 	}
@@ -100,4 +120,17 @@ String getWhenCompletionsShown() {
 		return this.whenCompletionsShown;
 	}
 
+	/**
+	 * Calls results objects to update history items list.
+	 *
+	 * @param player
+	 *   Player for which history is requested.
+	 * @param res
+	 *   History items.
+	 */
+	void applyOtherResults(final Player player, List<String> res) {
+		for (final QuestHistoryResult result: otherResults) {
+			result.apply(player, res);
+		}
+	}
 }

src/games/stendhal/server/entity/npc/quest/QuestHistoryResult.java

@@ -0,0 +1,33 @@
+/***************************************************************************
+ *                    Copyright © 2024 - Faiumoni e. V.                    *
+ ***************************************************************************
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+package games.stendhal.server.entity.npc.quest;
+
+import java.util.List;
+
+import games.stendhal.server.entity.player.Player;
+
+
+/**
+ * Class for adding a customized result to BuiltQuest history.
+ */
+public interface QuestHistoryResult {
+
+	/**
+	 * Called when history is requested.
+	 *
+	 * @param player
+	 *   Player for which history is requested.
+	 * @param res
+	 *   History items.
+	 */
+	abstract void apply(Player player, List<String> res);
+}