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comparison gamestate.py @ 0:7a89ea5404b1

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Initial commit of parpg-core.
author M. George Hansen <technopolitica@gmail.com>
date Sat, 14 May 2011 01:12:35 -0700
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children 98f26f7636d8
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-1:000000000000 0:7a89ea5404b1
1 # This file is part of PARPG.
2
3 # PARPG is free software: you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation, either version 3 of the License, or
6 # (at your option) any later version.
7
8 # PARPG is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
12
13 # You should have received a copy of the GNU General Public License
14 # along with PARPG. If not, see <http://www.gnu.org/licenses/>.
15
16 from parpg.quest_engine import QuestEngine
17
18 class GameState(object):
19 """This class holds the current state of the game."""
20 def __init__(self, quests_dir = None):
21 self.player_character = None
22 self.quest_engine = QuestEngine(quests_dir)
23 self.quest_engine.readQuests()
24 self.objects = {}
25 self.object_ids = {}
26 self.current_map_name = None
27 self.maps = {}
28
29
30 def addObject(self, map_id, game_object):
31 """Adds an object to the objects and object_ids
32 dictionaries.
33 @param map_id: ID of the map the object is on.
34 If the object is in a container this has to be None
35 @param object: object to be added
36 @type object: GameObject
37 @type map_id: str or None
38 """
39 object_id = game_object.ID
40 if not self.object_ids.has_key(object_id):
41 if map_id:
42 self.objects[map_id][object_id] = game_object
43 self.object_ids[object_id] = map_id
44
45 def deleteObject(self, object_id):
46 """Removes an object from the dictionaries
47 @param object_id: ID of the object
48 @type object_id: str
49 """
50 if self.hasObject(object_id):
51 map_id = self.getMapOfObject(object_id)
52 if map_id:
53 inst = self.maps[map_id].agent_layer.getInstance(object_id)
54 self.maps[map_id].agent_layer.deleteInstance(inst)
55 del self.objects[map_id][object_id]
56 del self.object_ids[object_id]
57
58
59 def getObjectsFromMap(self, map_id):
60 """Gets all objects that are currently on the given map.
61 @type map: String
62 @param map: The map name.
63 @returns: The list of objects on this map. Or an empty list"""
64 if map_id in self.objects:
65 return [i for i in self.objects[map_id].values() \
66 if map_id in self.objects]
67
68 return {}
69
70 def hasObject(self, object_id):
71 """Check if an object with the given id is present
72 @param object_id: ID of the object
73 @type object_id: str
74 @return: True if there is an object False if not
75 """
76 return self.object_ids.has_key(object_id)
77
78 def getMapOfObject(self, object_id):
79 """Returns the map the object is on.
80 @param object_id: ID of the object
81 @type object_id: str
82 @return: Name of the map the object is on.
83 If there is no such object or the object is in a container None is returned
84 """
85 if self.object_ids.has_key(object_id):
86 return self.object_ids[object_id]
87 return None
88
89 def getObjectById(self, obj_id, map_id = None):
90 """Gets an object by its object id and map id
91 @type obj_id: String
92 @param obj_id: The id of the object.
93 @type map_id: String
94 @param map_id: It id of the map containing the object.
95 @returns: The object or None."""
96 if not map_id:
97 map_id = self.getMapOfObject(obj_id)
98 if not map_id in self.objects:
99 self.objects[map_id] = {}
100 if obj_id in self.objects[map_id]:
101 return self.objects[map_id][obj_id]
102
103 def clearObjects(self):
104 """Delete all objects from the state
105 """
106 self.objects = {}
107 self.object_ids = {}
108
109 def getStateForSaving(self):
110 """Prepares state for saving
111 @type state: dictionary
112 @param state: State of the object
113 """
114 ret_dict = {}
115 ret_dict["CurrentMap"] = self.current_map_name
116 ret_dict["Quests"] = self.quest_engine.getStateForSaving()
117 return ret_dict
118
119 def restoreFromState(self, state):
120 """Restores the state"""
121 self.current_map_name = state["CurrentMap"]
122 self.quest_engine.readQuests()
123 self.quest_engine.restoreFromState(state["Quests"])
124