From dbc83dae37dff1338e1ee6358a0a8d10103278b0 Mon Sep 17 00:00:00 2001
From: David Athay <ko2fan@gmail.com>
Date: Wed, 22 Oct 2008 13:30:46 +0000
Subject: Added enabling and disabling NPCs.

---
 src/game-server/npc.cpp | 13 +++++++++----
 src/game-server/npc.hpp |  6 ++++++
 src/scripting/lua.cpp   | 34 +++++++++++++++++++++++++++++++++-
 3 files changed, 48 insertions(+), 5 deletions(-)

(limited to 'src')

diff --git a/src/game-server/npc.cpp b/src/game-server/npc.cpp
index fd462c50..ce344a52 100644
--- a/src/game-server/npc.cpp
+++ b/src/game-server/npc.cpp
@@ -25,14 +25,19 @@
 #include "scripting/script.hpp"
 
 NPC::NPC(const std::string &name, int id, Script *s):
-    Being(OBJECT_NPC, 65535), mScript(s), mID(id)
+    Being(OBJECT_NPC, 65535), mScript(s), mID(id), mEnabled(true)
 {
     setName(name);
 }
 
+void NPC::enable(bool enabled)
+{
+    mEnabled = enabled;
+}
+
 void NPC::update()
 {
-    if (!mScript) return;
+    if (!mScript || !mEnabled) return;
     mScript->prepare("npc_update");
     mScript->push(this);
     mScript->execute();
@@ -40,7 +45,7 @@ void NPC::update()
 
 void NPC::prompt(Character *ch, bool restart)
 {
-    if (!mScript) return;
+    if (!mScript || !mEnabled) return;
     mScript->prepare(restart ? "npc_start" : "npc_next");
     mScript->push(this);
     mScript->push(ch);
@@ -49,7 +54,7 @@ void NPC::prompt(Character *ch, bool restart)
 
 void NPC::select(Character *ch, int v)
 {
-    if (!mScript) return;
+    if (!mScript || !mEnabled) return;
     mScript->prepare("npc_choose");
     mScript->push(this);
     mScript->push(ch);
diff --git a/src/game-server/npc.hpp b/src/game-server/npc.hpp
index c4d8b384..cfcfa54a 100644
--- a/src/game-server/npc.hpp
+++ b/src/game-server/npc.hpp
@@ -38,6 +38,11 @@ class NPC : public Being
 
         void update();
 
+        /**
+         * Enables the NPC
+         */
+        void enable(bool enabled);
+
         /**
          * Prompts NPC.
          */
@@ -71,6 +76,7 @@ class NPC : public Being
     private:
         Script *mScript;    /**< Script describing NPC behavior. */
         unsigned short mID; /**< ID of the NPC. */
+        bool mEnabled;      /**< Whether NPC is enabled */
 };
 
 #endif
diff --git a/src/scripting/lua.cpp b/src/scripting/lua.cpp
index 09ac134e..846a43a1 100644
--- a/src/scripting/lua.cpp
+++ b/src/scripting/lua.cpp
@@ -216,6 +216,37 @@ static int LuaNpc_Create(lua_State *s)
     return 1;
 }
 
+/**
+ * Enable a NPC if it has previously disabled
+ */
+static int LuaNPC_Enable(lua_State *s)
+{
+    NPC *p = getNPC(s, 1);
+    if (p)
+    {
+        p->enable(true);
+        bool b = GameState::insert(p);
+        assert(b); (void)b;
+    }
+
+    return 0;
+}
+
+/**
+ * Disable a NPC
+ */
+static int LuaNPC_Disable(lua_State *s)
+{
+    NPC *p = getNPC(s, 1);
+    if (p)
+    {
+        p->enable(false);
+        GameState::remove(p);
+    }
+
+    return 0;
+}
+
 /**
  * Callback for warping a player to another place.
  * tmw.chr_warp(character, nil/int map, int x, int y)
@@ -468,7 +499,6 @@ static int LuaBeing_Damage(lua_State *s)
     return 0;
 }
 
-
 /**
  * Function for getting the x-coordinate of the position of a being
  */
@@ -781,6 +811,8 @@ LuaScript::LuaScript():
         { "npc_message",            &LuaNpc_Message      },
         { "npc_choice",             &LuaNpc_Choice       },
         { "npc_trade",              &LuaNpc_Trade        },
+        { "npc_enable",             &LuaNPC_Enable       },
+        { "npc_disable",            &LuaNPC_Disable      },
         { "chr_warp",               &LuaChr_Warp         },
         { "chr_inv_change",         &LuaChr_InvChange    },
         { "chr_inv_count",          &LuaChr_InvCount     },
-- 
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