From 1702f4fe35a59d6fbeb6864902da168e2138a592 Mon Sep 17 00:00:00 2001
From: Chuck Miller <shadowmil@gmail.com>
Date: Wed, 16 Sep 2009 21:11:34 -0400
Subject: Allow for basic scripted monsters

---
 src/game-server/monster.cpp | 33 +++++++++++++++++++++++++++++++++
 src/game-server/monster.hpp | 12 ++++++++++++
 src/scripting/lua.cpp       | 26 ++++++++++++++++++++++++++
 3 files changed, 71 insertions(+)

(limited to 'src')

diff --git a/src/game-server/monster.cpp b/src/game-server/monster.cpp
index 2de90787..f7d2bac6 100644
--- a/src/game-server/monster.cpp
+++ b/src/game-server/monster.cpp
@@ -24,8 +24,10 @@
 #include "game-server/character.hpp"
 #include "game-server/collisiondetection.hpp"
 #include "game-server/item.hpp"
+#include "game-server/resourcemanager.hpp"
 #include "game-server/mapcomposite.hpp"
 #include "game-server/state.hpp"
+#include "scripting/script.hpp"
 #include "utils/logger.h"
 
 #include <cmath>
@@ -60,6 +62,7 @@ static MonsterTargetEventDispatch monsterTargetEventDispatch;
 Monster::Monster(MonsterClass *specy):
     Being(OBJECT_MONSTER),
     mSpecy(specy),
+    mScript(NULL),
     mCountDown(0),
     mTargetListener(&monsterTargetEventDispatch),
     mOwner(NULL),
@@ -94,6 +97,10 @@ Monster::Monster(MonsterClass *specy):
 
 Monster::~Monster()
 {
+    // Remove the monster's script if it has one
+    if (mScript)
+        delete mScript;
+
     // Remove death listeners.
     for (std::map<Being *, int>::iterator i = mAnger.begin(),
          i_end = mAnger.end(); i != i_end; ++i)
@@ -152,6 +159,13 @@ void Monster::update()
         }
         return;
     }
+    else if(mScript)
+    {
+        mScript->setMap(getMap());
+        mScript->prepare("update");
+        mScript->push(this);
+        mScript->execute();
+    }
 
     if (mAction == ATTACK)
     {
@@ -276,6 +290,25 @@ void Monster::update()
     }
 }
 
+void Monster::loadScript(std::string &scriptName)
+{
+    if (mScript)
+        return; // A script has already been loaded for this monster
+
+    std::stringstream filename;
+    filename << "scripts/monster/" << scriptName;
+    if (ResourceManager::exists(filename.str()))       // file exists!
+    {
+        LOG_INFO("Loading monster script: " << filename.str());
+        mScript = Script::create("lua");
+        mScript->loadFile(filename.str());
+    } else {
+        LOG_WARN("Could not find script file \"" << filename.str() << "\" for monster");
+    }
+
+
+}
+
 int Monster::calculatePositionPriority(Point position, int targetPriority)
 {
     Point thisPos = getPosition();
diff --git a/src/game-server/monster.hpp b/src/game-server/monster.hpp
index 21b6cf2c..8dc2102b 100644
--- a/src/game-server/monster.hpp
+++ b/src/game-server/monster.hpp
@@ -23,11 +23,13 @@
 
 #include <map>
 #include <vector>
+#include <string>
 
 #include "game-server/being.hpp"
 #include "game-server/eventlistener.hpp"
 
 class ItemClass;
+class Script;
 
 /**
  * Structure containing an item class and its probability to be dropped
@@ -234,6 +236,11 @@ class Monster : public Being
          */
         void perform();
 
+        /**
+         * Loads a script file for this monster
+         */
+        void loadScript(std::string &scriptName);
+
         /**
          *
          */
@@ -276,6 +283,11 @@ class Monster : public Being
 
         MonsterClass *mSpecy;
 
+        /**
+         * Stores script for the monster, null if no script exist
+         */
+        Script *mScript;
+
         /** Count down till next random movement (temporary). */
         int mCountDown;
 
diff --git a/src/scripting/lua.cpp b/src/scripting/lua.cpp
index f82b581a..4b2513e6 100644
--- a/src/scripting/lua.cpp
+++ b/src/scripting/lua.cpp
@@ -777,6 +777,31 @@ static int monster_create(lua_State *s)
     return 1;
 }
 
+/**
+ * tmw.monster_load_script(mob, scriptfilename)
+ * loads a LUA script given for mob
+ */
+static int monster_load_script(lua_State *s)
+{
+    Monster *m = static_cast< Monster* >(getBeing(s, 1));
+    if (!m)
+    {
+         raiseScriptError(s, "monster_load_script called for a nonexistance monster.");
+         return 0;
+    }
+
+    std::string scriptName(lua_tostring(s, 2));
+    if (scriptName == "")
+    {
+        raiseScriptError(s, "monster_load_script called with incorrect parameters.");
+        return 0;
+    }
+
+    m->loadScript(scriptName);
+    return 0;
+}
+
+
 /**
  * Callback for getting a quest variable. Starts a recovery and returns
  * immediatly, if the variable is not known yet.
@@ -1339,6 +1364,7 @@ LuaScript::LuaScript():
         { "chr_get_hair_color",     &chr_get_hair_color   },
         { "exp_for_level",          &exp_for_level        },
         { "monster_create",         &monster_create       },
+        { "monster_load_script",    &monster_load_script  },
         { "being_apply_status",     &being_apply_status   },
         { "being_remove_status",    &being_remove_status  },
         { "being_has_status",       &being_has_status     },
-- 
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