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annotate src/parpg/dialogueactions.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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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 Provides classes used to implement dialogue logic and allow dialogues to have
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17 external effects on the game state.
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18 """
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19 import logging
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20
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21 logger = logging.getLogger('dialogueaction')
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22
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23 class DialogueAction(object):
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24 """
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25 Abstract base class for subclasses that represent dialogue actions embedded
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26 within a DialogueSection or DialogueResponse.
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27
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28 Subclasses must define the keyword class variable and implement both the
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29 __init__ and __call__ methods.
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30
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31 @cvar keyword: keyword used by the L{DialogueParser} to recognize the
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32 L{DialogueAction} in serialized L{Dialogues<Dialogues>}.
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33 @type keyword: basestring
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34 """
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35 logger = logging.getLogger('dialogueaction.DialogueAction')
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36 registered_actions = {}
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37
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38 @classmethod
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39 def registerAction(cls, dialogue_action_type):
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40 """
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41 Register a L{DialogueAction} subclass for easy reference.
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42
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43 @param dialogue_action_type: dialogue action to register.
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44 @type dialogue_action_type: L{DialogueAction} subclass
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45 """
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46 cls.registered_actions[dialogue_action_type.keyword] = \
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47 dialogue_action_type
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48
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49 def __init__(self, *args, **kwargs):
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50 """
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51 Initialize a new L{DialogueAction} instance.
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52
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53 @param args: positional arguments passed by the L{DialogueParser} after
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54 reading a serialized L{Dialogue}.
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55 @type args: list of objects
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56 @param kwargs: keyword arguments passed by the L{DialogueParser} after
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57 reading a serialized L{Dialogue}.
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58 @type kwargs: dict of objects
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59 """
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60 if (not hasattr(type(self), 'keyword')):
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61 raise AttributeError('DialogueAction subclasses must define the '
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62 'keyword class variable.')
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63 self.arguments = (args, kwargs)
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64
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65 def __call__(self, game_state):
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66 """
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67 Execute the L{DialogueAction}.
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68
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69 @param game_state: variables and functions that make up the current
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70 game state.
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71 @type game_state: dict of objects
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72 """
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73 raise NotImplementedError('subclasses of DialogueAction must '
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74 'override __call__')
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75
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76
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77 class MeetAction(DialogueAction):
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78 """
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79 L{DialogueAction} that adds an NPC to the list of NPCs known by the player.
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80 """
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81 keyword = 'meet'
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82
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83 def __init__(self, *args, **kwargs):
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84 """
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85 Initialize a new L{MeetAction} instance.
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86
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87 @param args: positional arguments.
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88 @type args: list of objects
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89 @param npc_id: identifier of the NPC that the player has met.
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90 @type npc_id: basestring
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91 @param kwargs: keyword arguments (not used).
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92 @type kwargs: dict of objects
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93 """
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94 DialogueAction.__init__(self, *args, **kwargs)
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95 self.npc_id = args[0]
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96
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97 def __call__(self, game_state):
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98 """
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99 Add an NPC to the list of NPCs known by the player.
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100
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101 @param game_state: variables and functions that make up the current
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102 game state.
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103 @type game_state: dict of objects
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104 """
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105 npc_id = self.npc_id
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106 # NOTE Technomage 2010-11-13: This print statement seems overly
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107 # verbose, so I'm logging it as an INFO message instead.
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108 # print("You've met {0}!".format(npc_id))
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109 self.logger.info("You've met {0}!".format(npc_id))
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110 game_state['pc'].meet(npc_id)
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111 DialogueAction.registerAction(MeetAction)
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112
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113
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114 class InventoryAction(DialogueAction):
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115 """
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116 Abstract base class for L{DialogueActions<DialogueAction>} used to
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117 manipulate the NPC's and the player's inventory.
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118 """
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119 def __init__(self, *args, **kwargs):
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120 """
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121 Initialize a new L{InventoryAction} instance.
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122
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123 @param args: positional arguments.
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124 @type args: list of objects
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125 @param item_types: item types that should be manipulated.
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126 @type item_types: list of basestrings
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127 @param kwargs: keyword arguments.
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128 @type kwargs: dict of objects
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129 """
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130 DialogueAction.__init__(self, *args, **kwargs)
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131 self.item_types = args
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132
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133
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134 class TakeStuffAction(InventoryAction):
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135 """
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136 L{InventoryAction} used to move items from the NPC's inventory to the
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137 player's inventory.
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138 """
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139 keyword = 'take_stuff'
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140
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141 def __call__(self, game_state):
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142 """
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143 Move items from the NPC's inventory to the player's inventory.
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144
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145 @param game_state: variables and functions that make up the current
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146 game state.
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147 @type game_state: dict of objects
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148 """
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149 item_types = self.item_types
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150 for item_type in item_types:
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151 item = game_state['npc'].inventory.findItem(item_type=item_type)
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152 if (item):
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153 game_state['npc'].give(item, game_state['pc'])
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154 print("{0} gave you the {1}".format(game_state['npc'].name,
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155 item_type))
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156 else:
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157 print("{0} doesn't have the {1}".format(game_state['npc'].name,
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158 item_type))
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159 DialogueAction.registerAction(TakeStuffAction)
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160
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161
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162 class GiveStuffAction(InventoryAction):
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163 """
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164 L{InventoryAction} used to move items from the player's inventory to the
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165 NPC's inventory.
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166 """
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167 keyword = 'give_stuff'
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168
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169 def __call__(self, game_state):
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170 """
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171 Move items from the player's inventory to the NPC's inventory.
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172
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173 @param game_state: variables and functions that make up the current
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174 game state.
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175 @type game_state: dict of objects
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176 """
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177 item_types = self.item_types
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178 for item_type in item_types:
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179 item = game_state['npc'].inventory.findItem(item_type = item_type)
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180 if (item):
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181 game_state['pc'].give(item, game_state['npc'])
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182 print("You give the {0} to {1}".format(item_type,
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183 game_state['npc'].name))
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184 else:
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185 print("You don't have the {0}".format(item_type))
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186 DialogueAction.registerAction(GiveStuffAction)
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187
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188
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189 class QuestAction(DialogueAction):
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190 """
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191 Abstract base class for quest-related L{DialogueActions<DialogueAction>}.
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192 """
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193 def __init__(self, *args, **kwargs):
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194 """
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195 Initialize a new L{QuestAction} instance.
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196
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197 @param args: positional arguments.
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198 @type args: list of objects
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199 @param quest_id: ID of the quest to manipulate.
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200 @type quest_id: basestring
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201 @param kwargs: keyword arguments (not used).
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202 @type kwargs: dict of objects
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203 """
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204 DialogueAction.__init__(self, *args, **kwargs)
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205 self.quest_id = kwargs['quest'] if 'quest' in kwargs else args[0]
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206
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207
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208 class StartQuestAction(QuestAction):
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209 """L{QuestAction} used to activate a quest."""
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210 keyword = 'start_quest'
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211
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212 def __call__(self, game_state):
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213 """
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214 Activate a quest.
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215
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216 @param game_state: variables and functions that make up the current
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217 game state.
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218 @type game_state: dict of objects
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219 """
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220 quest_id = self.quest_id
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221 print("You've picked up the \"{0}\" quest!".format(quest_id))
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222 game_state['quest'].activateQuest(quest_id)
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223 DialogueAction.registerAction(StartQuestAction)
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224
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225
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226 class CompleteQuestAction(QuestAction):
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227 """
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228 L{QuestAction} used to mark a quest as successfully finished/completed.
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229 """
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230 keyword = 'complete_quest'
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231
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232 def __call__(self, game_state):
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233 """
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234 Successfully complete a quest.
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235
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236 @param game_state: variables and functions that make up the current
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237 game state.
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238 @type game_state: dict of objects
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239 """
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240 quest_id = self.quest_id
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241 print("You've finished the \"{0}\" quest".format(quest_id))
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242 game_state['quest'].finishQuest(quest_id)
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243 DialogueAction.registerAction(CompleteQuestAction)
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244
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245
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246 class FailQuestAction(QuestAction):
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247 """L{QuestAction} used to fail an active quest."""
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248 keyword = 'fail_quest'
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249
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250 def __call__(self, game_state):
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251 """
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252 Fail an active quest.
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253
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254 @param game_state: variables and functions that make up the current
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255 game state.
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256 @type game_state: dict of objects
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257 """
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258 quest_id = self.quest_id
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259 print("You've failed the \"{0}\" quest".format(quest_id))
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260 game_state['quest'].failQuest(quest_id)
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261 DialogueAction.registerAction(FailQuestAction)
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262
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263
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264 class RestartQuestAction(QuestAction):
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265 """L{QuestAction} used to restart an active quest."""
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266 keyword = 'restart_quest'
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267
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268 def __call__(self, game_state):
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269 """
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270 Restart an active quest.
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271
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272 @param game_state: variables and functions that make up the current
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273 game state.
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274 @type game_state: dict of objects
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275 """
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276 quest_id = self.quest_id
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277 print("You've restarted the \"{0}\" quest".format(quest_id))
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278 game_state['quest'].restartQuest(quest_id)
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279 DialogueAction.registerAction(RestartQuestAction)
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280
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281
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282 class QuestVariableAction(QuestAction):
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283 """
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284 Base class for L{QuestActions<QuestAction>} that modify quest
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285 variables.
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286 """
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287 def __init__(self, *args, **kwargs):
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288 """
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289 Initialize a new L{QuestVariableAction} instance.
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290
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291 @param args: positional arguments (not used).
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292 @type args: list of objects
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293 @param kwargs: keyword arguments.
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294 @type kwargs: dict of objects
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295 @keyword quest: ID of the quest whose variable should be modified.
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296 @type quest: basestring
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297 @keyword variable: name of the quest variable to modify.
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298 @type variable: basestring
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299 @keyword value: new value that should be used to modify the quest
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300 variable.
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301 @type value: object
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302 """
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303 QuestAction.__init__(self, *args, **kwargs)
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304 self.variable_name = kwargs['variable']
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305 self.value = kwargs['value']
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306
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307
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308 class IncreaseQuestVariableAction(QuestVariableAction):
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309 """
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310 L{QuestVariableAction} used to increase the value of a quest variable by a
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311 set amount.
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312 """
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313 keyword = 'increase_quest_variable'
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314
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315 def __call__(self, game_state):
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316 """
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317 Increase a quest variable by a set amount.
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318
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319 @param game_state: variables and functions that make up the current
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320 game state.
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321 @type game_state: dict of objects
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322 """
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323 quest_id = self.quest_id
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324 variable_name = self.variable_name
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325 value = self.value
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326 print('Increased {0} by {1}'.format(variable_name, value))
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327 game_state['quest'][quest_id].increaseValue(variable_name, value)
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328 DialogueAction.registerAction(IncreaseQuestVariableAction)
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329
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330
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331 class DecreaseQuestVariableAction(QuestVariableAction):
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332 """
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333 L{QuestVariableAction} used to decrease the value of a quest variable by a
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334 set amount.
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335 """
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336 keyword = 'decrease_quest_variable'
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337
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338 def __call__(self, game_state):
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339 """
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340 Decrease a quest variable by a set amount.
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341
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342 @param game_state: variables and functions that make up the current
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343 game state.
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344 @type game_state: dict of objects
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345 """
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346 quest_id = self.quest_id
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347 variable_name = self.variable_name
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348 value = self.value
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349 print('Decreased {0} by {1}'.format(variable_name, value))
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350 game_state['quest'][quest_id].decreaseValue(variable_name, value)
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351 DialogueAction.registerAction(DecreaseQuestVariableAction)
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352
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353
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354 class SetQuestVariableAction(QuestVariableAction):
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355 """
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356 L{QuestVariableAction} used to set the value of a quest variable.
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357 """
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358 keyword = 'set_quest_variable'
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359
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360 def __call__(self, game_state):
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361 """
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362 Set the value of a quest variable.
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363
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364 @param game_state: variables and functions that make up the current
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365 game state.
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366 @type game_state: dict of objects
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367 """
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368 quest_id = self.quest_id
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369 variable_name = self.variable_name
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370 value = self.value
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371 print('Set {0} to {1}'.format(variable_name, value))
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372 game_state['quest'][quest_id].setValue(variable_name, value)
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373 DialogueAction.registerAction(SetQuestVariableAction)