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annotate src/parpg/gamestate.py @ 0:1fd2201f5c36

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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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1fd2201f5c36 Initial commit of parpg-core.
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1 # This file is part of PARPG.
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2
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3 # PARPG is free software: you can redistribute it and/or modify
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4 # it under the terms of the GNU General Public License as published by
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5 # the Free Software Foundation, either version 3 of the License, or
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6 # (at your option) any later version.
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7
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8 # PARPG is distributed in the hope that it will be useful,
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9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 # GNU General Public License for more details.
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12
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13 # You should have received a copy of the GNU General Public License
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14 # along with PARPG. If not, see <http://www.gnu.org/licenses/>.
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15
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16 from parpg.quest_engine import QuestEngine
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17
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18 class GameState(object):
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19 """This class holds the current state of the game."""
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20 def __init__(self, quests_dir = None):
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21 self.player_character = None
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22 self.quest_engine = QuestEngine(quests_dir)
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23 self.quest_engine.readQuests()
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24 self.objects = {}
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25 self.object_ids = {}
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26 self.current_map_name = None
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27 self.maps = {}
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28
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29
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30 def addObject(self, map_id, game_object):
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31 """Adds an object to the objects and object_ids
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32 dictionaries.
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33 @param map_id: ID of the map the object is on.
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34 If the object is in a container this has to be None
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35 @param object: object to be added
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36 @type object: GameObject
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37 @type map_id: str or None
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38 """
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39 object_id = game_object.ID
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40 if not self.object_ids.has_key(object_id):
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41 if map_id:
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42 self.objects[map_id][object_id] = game_object
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43 self.object_ids[object_id] = map_id
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44
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45 def deleteObject(self, object_id):
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46 """Removes an object from the dictionaries
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47 @param object_id: ID of the object
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48 @type object_id: str
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49 """
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50 if self.hasObject(object_id):
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51 map_id = self.getMapOfObject(object_id)
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52 if map_id:
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53 inst = self.maps[map_id].agent_layer.getInstance(object_id)
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54 self.maps[map_id].agent_layer.deleteInstance(inst)
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55 del self.objects[map_id][object_id]
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56 del self.object_ids[object_id]
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57
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58
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59 def getObjectsFromMap(self, map_id):
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60 """Gets all objects that are currently on the given map.
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61 @type map: String
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62 @param map: The map name.
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63 @returns: The list of objects on this map. Or an empty list"""
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64 if map_id in self.objects:
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65 return [i for i in self.objects[map_id].values() \
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66 if map_id in self.objects]
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67
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68 return {}
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69
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70 def hasObject(self, object_id):
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71 """Check if an object with the given id is present
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72 @param object_id: ID of the object
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73 @type object_id: str
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74 @return: True if there is an object False if not
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75 """
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76 return self.object_ids.has_key(object_id)
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77
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78 def getMapOfObject(self, object_id):
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79 """Returns the map the object is on.
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80 @param object_id: ID of the object
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81 @type object_id: str
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82 @return: Name of the map the object is on.
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83 If there is no such object or the object is in a container None is returned
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84 """
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85 if self.object_ids.has_key(object_id):
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86 return self.object_ids[object_id]
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87 return None
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88
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89 def getObjectById(self, obj_id, map_id = None):
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90 """Gets an object by its object id and map id
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91 @type obj_id: String
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92 @param obj_id: The id of the object.
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93 @type map_id: String
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94 @param map_id: It id of the map containing the object.
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95 @returns: The object or None."""
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96 if not map_id:
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97 map_id = self.getMapOfObject(obj_id)
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98 if not map_id in self.objects:
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99 self.objects[map_id] = {}
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100 if obj_id in self.objects[map_id]:
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101 return self.objects[map_id][obj_id]
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102
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103 def clearObjects(self):
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104 """Delete all objects from the state
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105 """
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106 self.objects = {}
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107 self.object_ids = {}
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108
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109 def getStateForSaving(self):
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110 """Prepares state for saving
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111 @type state: dictionary
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112 @param state: State of the object
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113 """
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114 ret_dict = {}
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115 ret_dict["CurrentMap"] = self.current_map_name
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116 ret_dict["Quests"] = self.quest_engine.getStateForSaving()
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117 return ret_dict
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118
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119 def restoreFromState(self, state):
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120 """Restores the state"""
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121 self.current_map_name = state["CurrentMap"]
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122 self.quest_engine.readQuests()
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123 self.quest_engine.restoreFromState(state["Quests"])
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124