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https://github.com/nexus-stc/hyperboria
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22 lines
821 B
Python
22 lines
821 B
Python
import random
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class Promotioner:
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"""
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Promotioner is used to select promotion randomly based on weights of every promotion.
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"""
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def __init__(self, promotions: list[dict]):
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self.promotions = promotions
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self.partial_sums: list = [self.promotions[0]['weight']]
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for promotion in self.promotions[1:]:
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self.partial_sums.append(promotion['weight'] + self.partial_sums[-1])
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def choose_promotion(self, language: str = 'en') -> str:
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pivot = random.randrange(self.partial_sums[-1])
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for partial_sum, promotion in zip(self.partial_sums, self.promotions):
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if partial_sum <= pivot:
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continue
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if language in promotion['texts']:
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return promotion['texts'][language]
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return promotion['texts']['en']
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