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diff --git a/engines/titanic/true_talk/doorbot_script.h b/engines/titanic/true_talk/doorbot_script.h
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+++ b/engines/titanic/true_talk/doorbot_script.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef TITANIC_DOORBOT_SCRIPT_H
+#define TITANIC_DOORBOT_SCRIPT_H
+
+#include "common/hashmap.h"
+#include "titanic/true_talk/tt_npc_script.h"
+
+namespace Titanic {
+
+class DoorbotScript : public TTnpcScript {
+	typedef Common::HashMap<uint, TTsentenceEntries> SentenceEntriesMap;
+private:
+	TTupdateStateArray _states;
+	SentenceEntriesMap _sentences;
+	int _stateIndex;
+private:
+	/**
+	 * Setup sentence data
+	 */
+	void setupSentences();
+
+	/**
+	 * Sets a response
+	 */
+	int setResponse(int dialogueId, int v34 = -1);
+
+	/**
+	 * Gets the dialogue Id for a given room
+	 */
+	int getRoomDialogueId1(const TTroomScript *roomScript);
+
+	/**
+	 * Gets the dialogue Id for a given room
+	 */
+	int getRoomDialogueId2(const TTroomScript *roomScript);
+public:
+	DoorbotScript(int val1, const char *charClass, int v2,
+		const char *charName, int v3, int val2, int v4, int v5, int v6, int v7);
+
+	/**
+	 * Chooses and adds a conversation response based on a specified tag Id.
+	 */
+	virtual int chooseResponse(const TTroomScript *roomScript, const TTsentence *sentence, uint tag);
+
+	/**
+	 * Does NPC specific processing of the parsed sentence
+	 */
+	virtual int process(const TTroomScript *roomScript, const TTsentence *sentence);
+
+	/**
+	 * Called when the script/id changes
+	 */
+	virtual ScriptChangedResult scriptChanged(const TTroomScript *roomScript, uint id);
+
+	virtual int handleQuote(const TTroomScript *roomScript, const TTsentence *sentence,
+		uint val, uint tagId, uint remainder);
+
+	/**
+	 * Handles updating NPC state based on specified dialogue Ids and dial positions
+	 */
+	virtual int updateState(uint oldId, uint newId, int index);
+
+	/**
+	 * Handles getting a pre-response
+	 */
+	virtual int preResponse(uint id);
+
+	/**
+	 * Returns a bitset of the dials being off or not
+	 */
+	virtual uint getDialsBitset() const;
+
+	/**
+	 * Process a sentence fragment entry
+	 */
+	virtual int doSentenceEntry(int val1, const int *srcIdP, const TTroomScript *roomScript, const TTsentence *sentence);
+
+	/**
+	 * Sets a given dial to be pointing in a specified region (0 to 2)
+	 */
+	virtual void setDialRegion(int dialNum, int region);
+
+	/**
+	 * Handles a randomzied response
+	 */
+	virtual bool randomResponse(uint index);
+};
+
+} // End of namespace Titanic
+
+#endif /* TITANIC_DOORBOT_SCRIPT_H */