forked from LBRYCommunity/lbry-sdk
27 lines
717 B
Python
27 lines
717 B
Python
class FindShortestID:
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__slots__ = 'short_id', 'new_id'
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def __init__(self):
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self.short_id = ''
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self.new_id = None
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def step(self, other_id, new_id):
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self.new_id = new_id
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for i in range(len(self.new_id)):
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if other_id[i] != self.new_id[i]:
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if i > len(self.short_id)-1:
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self.short_id = self.new_id[:i+1]
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break
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def finalize(self):
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if self.short_id:
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return '#'+self.short_id
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@classmethod
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def factory(cls):
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return cls(), cls.step, cls.finalize
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def register_canonical_functions(connection):
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connection.createaggregatefunction("shortest_id", FindShortestID.factory, 2)
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