[28] | 1 | class ProtagonistCondition(object):
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| 2 | """A condition on the protagonist that can be checked.
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| 3 | """
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| 4 |
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| 5 | def check(self, protagonist):
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| 6 | """Check if this condition applies.
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| 7 | """
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| 8 | raise NotImplementedError()
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| 9 |
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| 10 |
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| 11 | class AllConditions(ProtagonistCondition):
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[32] | 12 | """Condition that is met if all provided conditions are met.
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| 13 |
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| 14 | Conditions are evaluated lazily, so the first condition to fail stops
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| 15 | processing.
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| 16 | """
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[28] | 17 | def __init__(self, *conditions):
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| 18 | self.conditions = conditions
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| 19 |
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| 20 | def check(self, protagonist):
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| 21 | for condition in self.conditions:
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| 22 | if not condition.check(protagonist):
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| 23 | return False
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| 24 | return True
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| 25 |
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| 26 |
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| 27 | class AnyCondition(ProtagonistCondition):
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[32] | 28 | """Condition that is met if any provided condition is met.
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| 29 |
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| 30 | Conditions are evaluated lazily, so the first condition to pass stops
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| 31 | processing.
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| 32 | """
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[28] | 33 | def __init__(self, *conditions):
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| 34 | self.conditions = conditions
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| 35 |
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| 36 | def check(self, protagonist):
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| 37 | for condition in self.conditions:
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| 38 | if condition.check(protagonist):
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| 39 | return True
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| 40 | return False
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| 41 |
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| 42 |
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| 43 | class WolfFormCondition(ProtagonistCondition):
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[32] | 44 | """Condition that is met if the protagonist is in wolf form.
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| 45 | """
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[28] | 46 | def check(self, protagonist):
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| 47 | return protagonist.in_wolf_form()
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| 48 |
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| 49 |
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| 50 | class HumanFormCondition(ProtagonistCondition):
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[32] | 51 | """Condition that is met if the protagonist is in human form.
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| 52 | """
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[28] | 53 | def check(self, protagonist):
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| 54 | return protagonist.in_human_form()
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| 55 |
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| 56 |
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| 57 | class ItemRequiredCondition(ProtagonistCondition):
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[32] | 58 | """Condition that is met if the protagonist has the required item.
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| 59 | """
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[28] | 60 | def __init__(self, required_item):
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| 61 | self.required_item = required_item
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| 62 |
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| 63 | def check(self, protagonist):
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| 64 | return protagonist.has_item(self.required_item)
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| 65 |
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| 66 |
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[32] | 67 | class FunctionCondition(ProtagonistCondition):
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| 68 | """Condition that is met if the provided function returns `True`.
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| 69 | """
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| 70 | def __init__(self, func):
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| 71 | self.func = func
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| 72 |
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| 73 | def check(self, protagonist):
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| 74 | return self.func(protagonist)
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| 75 |
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| 76 |
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[28] | 77 | class Action(object):
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| 78 | """Representation of an action that can be performed.
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| 79 |
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| 80 | If the (optional) condition is met, the provided function will be called
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| 81 | with the protagonist and the target as parameters.
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| 82 | """
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| 83 | def __init__(self, func, condition=None):
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| 84 | self.func = func
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| 85 | self.condition = condition
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| 86 |
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| 87 | def check(self, protagonist):
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| 88 | if self.condition is None:
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| 89 | return True
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| 90 | return self.condition.check(protagonist)
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| 91 |
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| 92 | def perform(self, protagonist, target):
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| 93 | if not self.check(protagonist):
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| 94 | raise ValueError("Attempt to perform invalid action.")
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| 95 | return self.func(protagonist, target)
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| 96 |
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| 97 |
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| 98 | class Interactible(object):
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| 99 | """The property of interactibility on a thing.
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| 100 | """
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| 101 |
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| 102 | def __init__(self, *actions):
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| 103 | self.actions = actions
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| 104 |
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| 105 | def select_action(self, protagonist):
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| 106 | """Select a possible action given the protagonist's state.
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| 107 | """
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| 108 | for action in self.actions:
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| 109 | if action.check(protagonist):
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| 110 | return action
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| 111 | return None
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