--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gamestate.py	Sat May 14 01:12:35 2011 -0700
@@ -0,0 +1,124 @@
+#   This file is part of PARPG.
+
+#   PARPG 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 3 of the License, or
+#   (at your option) any later version.
+
+#   PARPG 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 PARPG.  If not, see <http://www.gnu.org/licenses/>.
+
+from parpg.quest_engine import QuestEngine
+
+class GameState(object):
+    """This class holds the current state of the game."""
+    def __init__(self, quests_dir = None):
+        self.player_character = None
+        self.quest_engine = QuestEngine(quests_dir)
+        self.quest_engine.readQuests()
+        self.objects = {}
+        self.object_ids = {}
+        self.current_map_name = None
+        self.maps = {}
+        
+        
+    def addObject(self, map_id, game_object):
+        """Adds an object to the objects and object_ids
+        dictionaries.
+        @param map_id: ID of the map the object is on. 
+        If the object is in a container this has to be None
+        @param object: object to be added
+        @type object: GameObject
+        @type map_id: str or None
+        """
+        object_id = game_object.ID
+        if not self.object_ids.has_key(object_id):
+            if map_id:
+                self.objects[map_id][object_id] = game_object
+            self.object_ids[object_id] = map_id
+    
+    def deleteObject(self, object_id):
+        """Removes an object from the dictionaries
+        @param object_id: ID of the object
+        @type object_id: str
+        """
+        if self.hasObject(object_id):
+            map_id = self.getMapOfObject(object_id)
+            if map_id:
+                inst = self.maps[map_id].agent_layer.getInstance(object_id)
+                self.maps[map_id].agent_layer.deleteInstance(inst)
+                del self.objects[map_id][object_id]
+            del self.object_ids[object_id]
+            
+            
+    def getObjectsFromMap(self, map_id):
+        """Gets all objects that are currently on the given map.
+           @type map: String
+           @param map: The map name.
+           @returns: The list of objects on this map. Or an empty list"""
+        if map_id in self.objects:
+            return [i for i in self.objects[map_id].values() \
+                                        if map_id in self.objects]
+        
+        return {}
+    
+    def hasObject(self, object_id):
+        """Check if an object with the given id is present 
+        @param object_id: ID of the object
+        @type object_id: str
+        @return: True if there is an object False if not
+        """
+        return self.object_ids.has_key(object_id)
+    
+    def getMapOfObject(self, object_id):
+        """Returns the map the object is on.
+        @param object_id: ID of the object
+        @type object_id: str
+        @return: Name of the map the object is on. 
+        If there is no such object or the object is in a container None is returned
+        """
+        if self.object_ids.has_key(object_id):
+            return self.object_ids[object_id]
+        return None
+    
+    def getObjectById(self, obj_id, map_id = None):
+        """Gets an object by its object id and map id
+           @type obj_id: String
+           @param obj_id: The id of the object.
+           @type map_id: String
+           @param map_id: It id of the map containing the object.
+           @returns: The object or None."""
+        if not map_id:
+            map_id = self.getMapOfObject(obj_id)
+        if not map_id in self.objects:
+            self.objects[map_id] = {}
+        if obj_id in self.objects[map_id]:
+            return self.objects[map_id][obj_id]
+    
+    def clearObjects(self):
+        """Delete all objects from the state
+        """
+        self.objects = {}
+        self.object_ids = {}
+        
+    def getStateForSaving(self):
+        """Prepares state for saving
+        @type state: dictionary
+        @param state: State of the object  
+        """
+        ret_dict = {}
+        ret_dict["CurrentMap"] = self.current_map_name
+        ret_dict["Quests"] = self.quest_engine.getStateForSaving()
+        return ret_dict
+
+    def restoreFromState(self, state):
+        """Restores the state"""
+        self.current_map_name = state["CurrentMap"]
+        self.quest_engine.readQuests()
+        self.quest_engine.restoreFromState(state["Quests"])
+