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